diff --git a/requirements.txt b/requirements.txt
index 2cea5a60..9e7b9f4a 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,6 +2,7 @@ Django>=1.11.18,<1.12
 jpype1==0.6.3
 numpy==1.15.2
 djangorestframework==3.6.4
+django-ratelimit==2.0.0
 bs4==0.0.1
 requests==2.20.1
 lxml==4.2.5
diff --git a/src/api/views.py b/src/api/views.py
index 3772bfc0..bf61b404 100644
--- a/src/api/views.py
+++ b/src/api/views.py
@@ -277,12 +277,12 @@ def convert(request):
                 message = jpype.JavaException.message(ex)
                 returnstatus = status.HTTP_400_BAD_REQUEST
                 httpstatus = 400
-                jpype.detachThreadFromJVM() 
+                jpype.detachThreadFromJVM()
             except :
                 message = format_exc()
                 returnstatus = status.HTTP_400_BAD_REQUEST
                 httpstatus = 400
-                jpype.detachThreadFromJVM() 
+                jpype.detachThreadFromJVM()
             query.tagToRdfFormat=tagToRdfFormat
             query.message=message
             query.status = httpstatus
@@ -473,10 +473,10 @@ def check_license(request):
                     returnstatus = status.HTTP_400_BAD_REQUEST
                     httpstatus = 400
                     jpype.detachThreadFromJVM()
-            
+
             except jpype.JavaException as ex :
                 """ Java exception raised without exiting the application """
-                result = jpype.JavaException.message(ex) 
+                result = jpype.JavaException.message(ex)
                 returnstatus = status.HTTP_400_BAD_REQUEST
                 httpstatus = 400
                 jpype.detachThreadFromJVM()
@@ -496,4 +496,4 @@ def check_license(request):
         else:
             return Response(
                 serializer.errors, status=status.HTTP_400_BAD_REQUEST
-                )        
\ No newline at end of file
+                )
diff --git a/src/app/templates/app/check_license.html b/src/app/templates/app/check_license.html
index 89e52e20..35eaadef 100644
--- a/src/app/templates/app/check_license.html
+++ b/src/app/templates/app/check_license.html
@@ -13,7 +13,7 @@
 		<textarea id="licensetext" name="licensetext" rows="18" style="width: 100%"></textarea>
 		<button id="checklicensebutton" class=" btn btn-md btn-info" type="submit">Check License</button>
 </form>
-{% include "app/modal.html" %} 
+{% include "app/modal.html" %}
 </div>
 {% endblock %}
 {% block script_block %}
@@ -59,7 +59,7 @@
                   $("#modal-body").html("<h3>"+data.data+"</h3>");
                   $("#myModal").modal({
                           backdrop: 'static',
-                          keyboard: true, 
+                          keyboard: true,
                           show: true
                   });
                   $("#checklicensebutton").text("Check License");
@@ -70,9 +70,17 @@
                   $("#modal-header").removeClass("green-modal");
                   try {
                     var obj = JSON.parse(e.responseText);
-                    $("#modal-header").addClass("red-modal");
-                    $("#modal-title").html("Error!");
-                    $("#modal-body").text(obj.data);
+										if (obj.type=="warning" || obj.type=="rate_limit"){
+                      $("#modal-header").removeClass("red-modal");
+                      $("#modal-header").addClass("yellow-modal");
+                      $("#modal-title").html("Warning!");
+                    }
+	                  else if (obj.type=="error"){
+	                      $("#modal-header").removeClass("yellow-modal");
+	                      $("#modal-header").addClass("red-modal");
+	                      $("#modal-title").html("Error!");
+	                    }
+	                  $("#modal-body").text(obj.data);
                   }
                   catch (e){
                     $("#modal-header").addClass("red-modal");
@@ -81,7 +89,7 @@
                   }
                   $("#myModal").modal({
                           backdrop: 'static',
-                          keyboard: true, 
+                          keyboard: true,
                           show: true
                   });
                   $("#checklicensebutton").text("Check License");
diff --git a/src/app/templates/app/compare.html b/src/app/templates/app/compare.html
index b46aae37..c1f2272d 100644
--- a/src/app/templates/app/compare.html
+++ b/src/app/templates/app/compare.html
@@ -27,11 +27,11 @@ <h4 id="doclabel">Upload SPDX Documents using the button or by dragging and drop
 		<div class = "form-group">
 			<div class="col-sm-12">
 			<label class="control-label col-sm-3" >Result File Name</label>
-				<div class="col-sm-6"> 
+				<div class="col-sm-6">
 					<input type="text" id="rfilename" placeholder="" name = "rfilename">
 					<label class="control-label" id="convertdoclabel">.xlsx</label>
 				</div>
-			</div>	
+			</div>
 		</div>
 		<hr>
 		<button class=" btn btn-md btn-info" type="submit" id="comparebutton" name="compare">Compare</button>
@@ -50,7 +50,7 @@ <h4 id="doclabel">Upload SPDX Documents using the button or by dragging and drop
   ['dragenter', 'dragover', 'dragleave', 'drop'].forEach(eventName => {
     dropArea.addEventListener(eventName, preventDefaults, false)
   });
-  
+
   function preventDefaults (e) {
     e.preventDefault()
     e.stopPropagation()
@@ -59,19 +59,19 @@ <h4 id="doclabel">Upload SPDX Documents using the button or by dragging and drop
   ['dragenter', 'dragover'].forEach(eventName => {
     dropArea.addEventListener(eventName, highlight, false)
   });
-  
+
   ['dragleave', 'drop'].forEach(eventName => {
     dropArea.addEventListener(eventName, unhighlight, false)
   });
-  
+
   function highlight(e) {
     dropArea.classList.add('highlight')
   }
-  
+
   function unhighlight(e) {
     dropArea.classList.remove('highlight')
   }
-  
+
   dropArea.addEventListener('drop', handleDrop, false)
 
   function handleDrop(e) {
@@ -83,7 +83,7 @@ <h4 id="doclabel">Upload SPDX Documents using the button or by dragging and drop
   function handleFiles(files) {
     ([...files]).forEach(checkFile)
   }
-  
+
   function checkFile(file){
     if(file && selected_files.length<13){
       if ($(".file-name").text() == "No file selected"){
@@ -153,7 +153,7 @@ <h4 id="doclabel">Upload SPDX Documents using the button or by dragging and drop
 	                $("#modal-body").html('<h3><a href="'+data.medialink+'"><span class="glyphicon glyphicon-save-file"></span> Download file now</a></h3>');
 	                $("#myModal").modal({
 	                        backdrop: 'static',
-	                        keyboard: true, 
+	                        keyboard: true,
 	                        show: true
 	                });
 	                $("#comparebutton").text("Compare");
@@ -165,6 +165,12 @@ <h4 id="doclabel">Upload SPDX Documents using the button or by dragging and drop
 	                $("#modal-header").removeClass("green-modal");
 	                try{
 		                var obj = JSON.parse(e.responseText);
+                    if (obj.type=="rate_limit"){
+                      $("#modal-header").removeClass("red-modal");
+                      $("#modal-header").addClass("yellow-modal");
+                      $("#modal-title").html("Warning!");
+                      $("#modal-body").text(obj.data);
+                    }
 		                if (obj.type=="warning"){
 		                    $("#modal-header").removeClass("red-modal");
 		                    $("#modal-header").addClass("yellow-modal");
@@ -208,7 +214,7 @@ <h4 id="doclabel">Upload SPDX Documents using the button or by dragging and drop
 
 	                $("#myModal").modal({
                           backdrop: 'static',
-                          keyboard: true, 
+                          keyboard: true,
                           show: true
                   	});
 	                $("#comparebutton").text("Compare");
@@ -231,4 +237,4 @@ <h4 id="doclabel">Upload SPDX Documents using the button or by dragging and drop
 });
 </script>
 
-{% endblock %}
\ No newline at end of file
+{% endblock %}
diff --git a/src/app/templates/app/convert.html b/src/app/templates/app/convert.html
index c56c9e20..28e3c50b 100644
--- a/src/app/templates/app/convert.html
+++ b/src/app/templates/app/convert.html
@@ -55,20 +55,20 @@ <h4 id="doclabel">Upload SPDX Document using the button or by dragging and dropp
     <div class = "form-group">
 			<div class="col-sm-12">
 			<label class="control-label col-sm-3" id="doclabel" >SPDX Document</label>
-				<div class="col-sm-3"> 
+				<div class="col-sm-3">
 				  <input type="file" id="file" placeholder="" name = "file"  >
 				</div>
-			</div>	
+			</div>
     </div>
     -->
 		<div class = "form-group">
 			<div class="col-sm-12">
 			<label class="control-label col-sm-3" >Converted File Name</label>
-				<div class="col-sm-3"> 
+				<div class="col-sm-3">
 				  <input type="text" id="cfilename" placeholder="" name = "cfilename"  >
 				  <label class="control-label" id="convertdoclabel" ></label>
 				</div>
-			</div>	
+			</div>
 		</div>
     <hr>
 		<input type="hidden" id="cfileformat" name="cfileformat" value="">
@@ -88,7 +88,7 @@ <h4 id="doclabel">Upload SPDX Document using the button or by dragging and dropp
   ['dragenter', 'dragover', 'dragleave', 'drop'].forEach(eventName => {
     dropArea.addEventListener(eventName, preventDefaults, false)
   });
-  
+
   function preventDefaults (e) {
     e.preventDefault()
     e.stopPropagation()
@@ -97,19 +97,19 @@ <h4 id="doclabel">Upload SPDX Document using the button or by dragging and dropp
   ['dragenter', 'dragover'].forEach(eventName => {
     dropArea.addEventListener(eventName, highlight, false)
   });
-  
+
   ['dragleave', 'drop'].forEach(eventName => {
     dropArea.addEventListener(eventName, unhighlight, false)
   });
-  
+
   function highlight(e) {
     dropArea.classList.add('highlight')
   }
-  
+
   function unhighlight(e) {
     dropArea.classList.remove('highlight')
   }
-  
+
   dropArea.addEventListener('drop', handleDrop, false)
 
   function handleDrop(e) {
@@ -121,7 +121,7 @@ <h4 id="doclabel">Upload SPDX Document using the button or by dragging and dropp
   function handleFiles(files) {
     ([...files]).forEach(checkFile)
   }
-  
+
   function checkFile(file){
     if(file){
       $(".file-name").html("<b>Selected File: </b>"+file.name);
@@ -264,7 +264,7 @@ <h4 id="doclabel">Upload SPDX Document using the button or by dragging and dropp
                   $("#modal-body").html('<h3><a href="'+data.medialink+'"><span class="glyphicon glyphicon-save-file"></span> Download file now</a></h3>');
                   $("#myModal").modal({
                           backdrop: 'static',
-                          keyboard: true, 
+                          keyboard: true,
                           show: true
                   });
                   $("#convertbutton").text("Convert");
@@ -276,6 +276,12 @@ <h4 id="doclabel">Upload SPDX Document using the button or by dragging and dropp
                   $("#modal-body").text("");
               	  try{
               	  	var obj = JSON.parse(e.responseText);
+                    if (obj.type=="rate_limit"){
+                      $("#modal-header").removeClass("red-modal");
+                      $("#modal-header").addClass("yellow-modal");
+                      $("#modal-title").html("Warning!");
+                      $("#modal-body").text(obj.data);
+                    }
               	  	if (obj.type=="warning"){
 	                    $("#modal-header").removeClass("red-modal");
 	                    $("#modal-header").addClass("yellow-modal");
@@ -297,10 +303,10 @@ <h4 id="doclabel">Upload SPDX Document using the button or by dragging and dropp
                     $("#modal-title").html("Error!");
                     $("#modal-body").text("The application could not be connected. Please try later.");
               	  }
-                  
+
                   $("#myModal").modal({
                           backdrop: 'static',
-                          keyboard: true, 
+                          keyboard: true,
                           show: true
                   });
                   $("#convertbutton").text("Convert");
@@ -319,4 +325,4 @@ <h4 id="doclabel">Upload SPDX Document using the button or by dragging and dropp
 
 </script>
 
-{% endblock %}
\ No newline at end of file
+{% endblock %}
diff --git a/src/app/templates/app/submit_new_license.html b/src/app/templates/app/submit_new_license.html
index 4b1a8157..1b73c820 100644
--- a/src/app/templates/app/submit_new_license.html
+++ b/src/app/templates/app/submit_new_license.html
@@ -244,7 +244,7 @@
                   $("#modal-header").removeClass("green-modal");
                   try {
                     var obj = JSON.parse(e.responseText);
-                    if (obj.type=="warning"){
+                    if (obj.type=="warning" || obj.type=="rate_limit"){
                       $("#modal-header").removeClass("red-modal");
                       $("#modal-header").addClass("yellow-modal");
                       $("#modal-title").html("Warning!");
diff --git a/src/app/templates/app/validate.html b/src/app/templates/app/validate.html
index d582f04c..6314873f 100644
--- a/src/app/templates/app/validate.html
+++ b/src/app/templates/app/validate.html
@@ -23,7 +23,7 @@ <h4>Upload file using the button or by dragging and dropping onto the dashed reg
     </form>
   </div> <hr>
     <button id="validatebutton" name="validatebutton" class="btn btn-md btn-info" type="submit" disabled="true">Validate</button>
-  {% include "app/modal.html" %} 
+  {% include "app/modal.html" %}
   <!--
   <output id="list"></output>
   -->
@@ -40,7 +40,7 @@ <h4>Upload file using the button or by dragging and dropping onto the dashed reg
   ['dragenter', 'dragover', 'dragleave', 'drop'].forEach(eventName => {
     dropArea.addEventListener(eventName, preventDefaults, false)
   });
-  
+
   function preventDefaults (e) {
     e.preventDefault()
     e.stopPropagation()
@@ -49,19 +49,19 @@ <h4>Upload file using the button or by dragging and dropping onto the dashed reg
   ['dragenter', 'dragover'].forEach(eventName => {
     dropArea.addEventListener(eventName, highlight, false)
   });
-  
+
   ['dragleave', 'drop'].forEach(eventName => {
     dropArea.addEventListener(eventName, unhighlight, false)
   });
-  
+
   function highlight(e) {
     dropArea.classList.add('highlight')
   }
-  
+
   function unhighlight(e) {
     dropArea.classList.remove('highlight')
   }
-  
+
   dropArea.addEventListener('drop', handleDrop, false)
 
   function handleDrop(e) {
@@ -73,7 +73,7 @@ <h4>Upload file using the button or by dragging and dropping onto the dashed reg
   function handleFiles(files) {
     ([...files]).forEach(checkFile)
   }
-  
+
   function checkFile(file){
     if(file){
       $(".file-name").html("<b>Selected File: </b>"+file.name);
@@ -125,7 +125,7 @@ <h4>Upload file using the button or by dragging and dropping onto the dashed reg
                   $("#modal-body").html("<h3>"+data.data+"</h3>");
                   $("#myModal").modal({
                           backdrop: 'static',
-                          keyboard: true, 
+                          keyboard: true,
                           show: true
                   });
                   $("#validatebutton").text("Validate");
@@ -136,7 +136,7 @@ <h4>Upload file using the button or by dragging and dropping onto the dashed reg
                   $("#modal-header").removeClass("green-modal");
                   try {
                   	var obj = JSON.parse(e.responseText);
-                  	if (obj.type=="warning"){
+                  	if (obj.type=="warning" || obj.type=="rate_limit"){
 	                    $("#modal-header").removeClass("red-modal");
 	                    $("#modal-header").addClass("yellow-modal");
 	                    $("#modal-title").html("Warning!");
@@ -156,7 +156,7 @@ <h4>Upload file using the button or by dragging and dropping onto the dashed reg
                   }
                   $("#myModal").modal({
                           backdrop: 'static',
-                          keyboard: true, 
+                          keyboard: true,
                           show: true
                   });
                   $("#validatebutton").text("Validate");
@@ -236,4 +236,4 @@ <h4>Upload file using the button or by dragging and dropping onto the dashed reg
 </script>
 -->
 
-{% endblock %}
\ No newline at end of file
+{% endblock %}
diff --git a/src/app/templates/app/xml_upload.html b/src/app/templates/app/xml_upload.html
index 2726f337..e42ed7eb 100644
--- a/src/app/templates/app/xml_upload.html
+++ b/src/app/templates/app/xml_upload.html
@@ -28,7 +28,7 @@
 <div class="panel panel-default">
   <div class="panel-heading"> <p class="lead">Upload the XML File</p> </div>
     <div class="panel-body">
-  
+
       <ul class="nav nav-tabs">
         <li class="active"><a data-toggle="tab" href="#text">XML Text</a></li>
         <li><a data-toggle="tab" href="#upload">Upload File</a></li>
@@ -62,7 +62,7 @@ <h4>Upload XML file using the button or by dragging and dropping onto the dashed
             {% csrf_token %}
             <div class="container" style="margin-top:20px;">
               <label class="control-label col-sm-6" >License Full Name or Identifier as on SPDX License List:</label>
-              <div class="col-sm-6" style="text-align:left;"> 
+              <div class="col-sm-6" style="text-align:left;">
                 <input type="text" id="licenseName" placeholder="License Name" name="licenseName" autocomplete="off" autofocus style="width:280px;">
               </div>
             </div> <hr>
@@ -77,7 +77,7 @@ <h3>Make a new License XML file from scratch</h3><br>
           </form>
         </div>
   </div>
-  {% include "app/modal.html" %} 
+  {% include "app/modal.html" %}
   </div>
 </div>
 {% endblock %}
@@ -91,7 +91,7 @@ <h3>Make a new License XML file from scratch</h3><br>
   ['dragenter', 'dragover', 'dragleave', 'drop'].forEach(eventName => {
     dropArea.addEventListener(eventName, preventDefaults, false)
   });
-  
+
   function preventDefaults (e) {
     e.preventDefault()
     e.stopPropagation()
@@ -100,19 +100,19 @@ <h3>Make a new License XML file from scratch</h3><br>
   ['dragenter', 'dragover'].forEach(eventName => {
     dropArea.addEventListener(eventName, highlight, false)
   });
-  
+
   ['dragleave', 'drop'].forEach(eventName => {
     dropArea.addEventListener(eventName, unhighlight, false)
   });
-  
+
   function highlight(e) {
     dropArea.classList.add('highlight')
   }
-  
+
   function unhighlight(e) {
     dropArea.classList.remove('highlight')
   }
-  
+
   dropArea.addEventListener('drop', handleDrop, false)
 
   function handleDrop(e) {
@@ -124,7 +124,7 @@ <h3>Make a new License XML file from scratch</h3><br>
   function handleFiles(files) {
     ([...files]).forEach(checkFile)
   }
-  
+
   function checkFile(file){
     if(file.type=="text/xml" || file.type=="application/xml"){
       $(".file-name").html("<b>Selected File: </b>"+file.name);
@@ -144,7 +144,7 @@ <h3>Make a new License XML file from scratch</h3><br>
 </script>
 
 <script type="text/javascript">
-  
+
   function button_change(state){
     /* to change the state of submit button */
     if(state == 0){
@@ -181,7 +181,7 @@ <h3>Make a new License XML file from scratch</h3><br>
         $("#modal-header").removeClass("green-modal");
         try {
           var obj = JSON.parse(e.responseText);
-          if (obj.type=="warning"){
+          if (obj.type=="warning" || obj.type=="rate_limit"){
             $("#modal-header").removeClass("red-modal");
             $("#modal-header").addClass("yellow-modal");
             $("#modal-title").html("Warning!");
@@ -201,7 +201,7 @@ <h3>Make a new License XML file from scratch</h3><br>
         }
         $("#myModal").modal({
           backdrop: 'static',
-          keyboard: true, 
+          keyboard: true,
           show: true
         });
         button_change(1);
diff --git a/src/app/tests.py b/src/app/tests.py
index b2395a24..954a7eed 100644
--- a/src/app/tests.py
+++ b/src/app/tests.py
@@ -1,7 +1,8 @@
 # -*- coding: utf-8 -*-
 from __future__ import unicode_literals
 
-from django.test import TestCase
+import json
+from django.test import RequestFactory, TestCase
 from unittest import skipIf
 from src.secret import getAccessToken, getGithubUserId, getGithubUserName
 from django.contrib.auth.models import User
@@ -20,11 +21,15 @@
 
 from app.models import UserID
 from app.models import LicenseRequest
-from app.views import generateLicenseXml
-from django.contrib.auth.models import User
+from app.views import generateLicenseXml, submitNewLicense, RATE_LIMIT_TYPE, RATE_LIMIT_MSG, xml_upload, check_license, convert, compare, validate_xml, validate
+from django.contrib.auth.models import User, AnonymousUser
 from django.contrib.auth import authenticate
 from social_django.models import UserSocialAuth
 
+from ratelimit.decorators import ratelimit
+# from ratelimit.exceptions import Ratelimited
+# from ratelimit.core import get_usage, is_ratelimited, _split_rate
+
 
 class IndexViewsTestCase(TestCase):
 
@@ -1079,7 +1084,7 @@ def test_license_requests(self):
         self.assertEqual(resp.resolver_match.func.__name__,"licenseRequests")
 
 class ArchiveLicenseRequestsViewsTestCase(StaticLiveServerTestCase):
-    
+
     def setUp(self):
         options = Options()
         options.add_argument('-headless')
@@ -1097,7 +1102,7 @@ def test_archive_license_requests(self):
         self.assertEqual(resp.redirect_chain,[])
         self.assertIn("app/archive_requests.html",(i.name for i in resp.templates))
         self.assertEqual(resp.resolver_match.func.__name__,"archiveRequests")
-    
+
     def test_error_archive_license_requests(self):
         """Check if error page is displayed when the license id does not exist for archive license"""
         license_id = 0
@@ -1248,3 +1253,112 @@ def test_no_license_id_on_license_requests_edit_xml(self):
         self.assertEqual(resp.status_code,200)
         self.assertIn("app/license_requests.html",(i.name for i in resp.templates))
         self.assertEqual(resp.resolver_match.func.__name__,"licenseRequests")
+
+
+class LimitRequestsTestCase(StaticLiveServerTestCase):
+
+    def setUp(self):
+        options = Options()
+        self.factory = RequestFactory()
+        options.add_argument('-headless')
+        self.selenium = webdriver.Firefox(firefox_options=options)
+        super(LimitRequestsTestCase, self).setUp()
+
+    def tearDown(self):
+        self.selenium.quit()
+        super(LimitRequestsTestCase, self).tearDown()
+
+    def test_get_license_submit_request(self):
+        """Limit post on license request submission"""
+        resp = self.client.get(reverse("submit-new-license"),follow=True,secure=True)
+        self.assertEqual(resp.status_code,200)
+        self.assertEqual(resp.redirect_chain,[])
+        self.assertIn("app/submit_new_license.html",(i.name for i in resp.templates))
+        self.assertEqual(resp.resolver_match.func.__name__,"submitNewLicense")
+
+    def test_post_license_submit_request(self):
+        """Check if the license submit post request is limited"""
+        request = self.factory.post('/submit_new_license')
+        request.user = AnonymousUser()
+        # Limit the request
+        request.limited = True
+        resp = submitNewLicense(request)
+        result = json.loads(resp.content)
+        self.assertEqual(resp.status_code,401)
+        self.assertEqual(result["data"],RATE_LIMIT_MSG)
+        self.assertEqual(result["type"],RATE_LIMIT_TYPE)
+
+    def test_post_validate_request(self):
+        """Check if the validate post request is limited"""
+        request = self.factory.post('/validate')
+        request.user = AnonymousUser()
+        # Limit the request
+        request.limited = True
+        resp = validate(request)
+        result = json.loads(resp.content)
+        self.assertEqual(resp.status_code,401)
+        self.assertEqual(result["data"],RATE_LIMIT_MSG)
+        self.assertEqual(result["type"],RATE_LIMIT_TYPE)
+
+    def test_post_validate_xml_request(self):
+        """Check if the validate_xml post request is limited"""
+        request = self.factory.post('/validate_xml')
+        request.user = AnonymousUser()
+        # Limit the request
+        request.limited = True
+        resp = validate_xml(request)
+        result = json.loads(resp.content)
+        self.assertEqual(resp.status_code,401)
+        self.assertEqual(result["data"],RATE_LIMIT_MSG)
+        self.assertEqual(result["type"],RATE_LIMIT_TYPE)
+
+    def test_post_compare_request(self):
+        """Check if the compare post request is limited"""
+        request = self.factory.post('/compare')
+        request.user = AnonymousUser()
+        # Limit the request
+        request.limited = True
+        resp = compare(request)
+        result = json.loads(resp.content)
+        self.assertEqual(resp.status_code,401)
+        self.assertEqual(result["data"],RATE_LIMIT_MSG)
+        self.assertEqual(result["type"],RATE_LIMIT_TYPE)
+
+
+    def test_post_convert_request(self):
+        """Check if the convert post request is limited"""
+        request = self.factory.post('/convert')
+        request.user = AnonymousUser()
+        # Limit the request
+        request.limited = True
+        resp = convert(request)
+        result = json.loads(resp.content)
+        self.assertEqual(resp.status_code,401)
+        self.assertEqual(result["data"],RATE_LIMIT_MSG)
+        self.assertEqual(result["type"],RATE_LIMIT_TYPE)
+
+
+    def test_post_check_license_request(self):
+        """Check if the check_license post request is limited"""
+        request = self.factory.post('/check_license')
+        request.user = AnonymousUser()
+        # Limit the request
+        request.limited = True
+        resp = check_license(request)
+        result = json.loads(resp.content)
+        self.assertEqual(resp.status_code,401)
+        self.assertEqual(result["data"],RATE_LIMIT_MSG)
+        self.assertEqual(result["type"],RATE_LIMIT_TYPE)
+
+
+    def test_post_xml_upload_request(self):
+        """Check if the xml_upload post request is limited"""
+        request = self.factory.post('/xml_upload')
+        request.user = AnonymousUser()
+        # Limit the request
+        request.limited = True
+        resp = xml_upload(request)
+        result = json.loads(resp.content)
+        self.assertEqual(resp.status_code,401)
+        self.assertEqual(result["data"],RATE_LIMIT_MSG)
+        self.assertEqual(result["type"],RATE_LIMIT_TYPE)
diff --git a/src/app/views.py b/src/app/views.py
index 16e4c566..d6636f9c 100644
--- a/src/app/views.py
+++ b/src/app/views.py
@@ -56,9 +56,13 @@
 logger = logging.getLogger()
 from .forms import LicenseRequestForm
 from .models import LicenseRequest
+from ratelimit.decorators import ratelimit
+
 
 NORMAL = "normal"
 TESTS = "tests"
+RATE_LIMIT_MSG = "Sorry, your quota of hourly requests has been reached."
+RATE_LIMIT_TYPE = "rate_limit"
 
 TYPE_TO_URL = {
 NORMAL:  settings.REPO_URL,
@@ -67,6 +71,14 @@
 
 import cgi
 
+def rate_limit_reponse(request):
+    ajaxdict = {}
+    ajaxdict["type"] = RATE_LIMIT_TYPE
+    ajaxdict["data"] = RATE_LIMIT_MSG
+    response = dumps(ajaxdict)
+    return HttpResponse(response,status=401)
+
+
 def index(request):
     """ View for index
     returns index.html template
@@ -85,13 +97,17 @@ def about(request):
         'app/about.html',context_dict
         )
 
+@ratelimit(key='user_or_ip', rate='100/h', method=['POST'])
 def submitNewLicense(request):
     """ View for submit new licenses
     returns submit_new_license.html template
     """
     context_dict = {}
     ajaxdict = {}
+    was_limited = getattr(request, 'limited', False)
     if request.method=="POST":
+        if was_limited:
+            return rate_limit_reponse(request)
         if not request.user.is_authenticated():
             if (request.is_ajax()):
                 ajaxdict["type"] = "auth_error"
@@ -204,7 +220,7 @@ def createIssue(licenseAuthorName, licenseName, licenseIdentifier, licenseCommen
     url = TYPE_TO_URL[urlType]
     r = post(url, data=dumps(payload), headers=headers)
     return r.status_code
-    
+
 def licenseInformation(request, licenseId):
     """ View for license request and archive request information
     returns license_information.html template
@@ -320,13 +336,17 @@ def download_xml_file(request, licenseId):
     response['Content-Disposition'] = 'inline; filename=myfile.xml'
     return response
 
+@ratelimit(key='user_or_ip', rate='100/h', method=['POST'])
 def validate(request):
     """ View for validate tool
     returns validate.html template
     """
     if request.user.is_authenticated() or settings.ANONYMOUS_LOGIN_ENABLED:
         context_dict={}
+        was_limited = getattr(request, 'limited', False)
         if request.method == 'POST':
+            if was_limited:
+                return rate_limit_reponse(request)
             if (jpype.isJVMStarted()==0):
                 """ If JVM not already started, start it."""
                 classpath = settings.JAR_ABSOLUTE_PATH
@@ -433,13 +453,17 @@ def validate(request):
     else :
         return HttpResponseRedirect(settings.LOGIN_URL)
 
+@ratelimit(key='user_or_ip', rate='100/h', method=['POST'])
 def validate_xml(request):
     """ View to validate xml text against SPDX License XML Schema,
          used in the license xml editor """
     if request.user.is_authenticated() or settings.ANONYMOUS_LOGIN_ENABLED:
         context_dict={}
+        was_limited = getattr(request, 'limited', False)
         if request.method == 'POST':
             ajaxdict=dict()
+            if was_limited:
+                return rate_limit_reponse(request)
             try :
                 if "xmlText" in request.POST:
                     """ Saving file to the media directory """
@@ -513,13 +537,17 @@ def validate_xml(request):
     else :
         return HttpResponseRedirect(settings.LOGIN_URL)
 
+@ratelimit(key='user_or_ip', rate='100/h', method=['POST'])
 def compare(request):
     """ View for compare tool
     returns compare.html template
     """
     if request.user.is_authenticated() or settings.ANONYMOUS_LOGIN_ENABLED:
         context_dict={}
+        was_limited = getattr(request, 'limited', False)
         if request.method == 'POST':
+            if was_limited:
+                return rate_limit_reponse(request)
             if (jpype.isJVMStarted()==0):
                 """ If JVM not already started, start it, attach a Thread and start processing the request """
                 classpath =settings.JAR_ABSOLUTE_PATH
@@ -687,13 +715,17 @@ def getFileFormat(to_format):
     else :
         return ".invalid"
 
+@ratelimit(key='user_or_ip', rate='100/h', method=['POST'])
 def convert(request):
     """ View for convert tool
     returns convert.html template
     """
     if request.user.is_authenticated() or settings.ANONYMOUS_LOGIN_ENABLED:
         context_dict={}
+        was_limited = getattr(request, 'limited', False)
         if request.method == 'POST':
+            if was_limited:
+                return rate_limit_reponse(request)
             if (jpype.isJVMStarted()==0):
                 """ If JVM not already started, start it, attach a Thread and start processing the request """
                 classpath =settings.JAR_ABSOLUTE_PATH
@@ -876,13 +908,17 @@ def convert(request):
     else :
         return HttpResponseRedirect(settings.LOGIN_URL)
 
+@ratelimit(key='user_or_ip', rate='100/h', method=['POST'])
 def check_license(request):
     """ View for check license tool
     returns check_license.html template
     """
+    was_limited = getattr(request, 'limited', False)
     if request.user.is_authenticated() or settings.ANONYMOUS_LOGIN_ENABLED:
         context_dict={}
         if request.method == 'POST':
+            if was_limited:
+                return rate_limit_reponse(request)
             licensetext = request.POST.get('licensetext')
             if (jpype.isJVMStarted()==0):
                 """ If JVM not already started, start it, attach a Thread and start processing the request """
@@ -958,6 +994,7 @@ def check_license(request):
     else:
         return HttpResponseRedirect(settings.LOGIN_URL)
 
+@ratelimit(key='user_or_ip', rate='100/h', method=['POST'])
 def xml_upload(request):
     """ View for uploading XML file
     returns xml_upload.html
@@ -965,7 +1002,10 @@ def xml_upload(request):
     if request.user.is_authenticated() or settings.ANONYMOUS_LOGIN_ENABLED:
         context_dict={}
         ajaxdict = {}
+        was_limited = getattr(request, 'limited', False)
         if request.method == 'POST':
+            if was_limited:
+                return rate_limit_reponse(request)
             try:
                 if "xmlTextButton" in request.POST:
                     """ If user provides XML text using textarea """
@@ -1175,7 +1215,7 @@ def archiveRequests(request, license_id=None):
             LicenseRequest.objects.filter(pk=license_id).update(archive=archive)
     archiveRequests = LicenseRequest.objects.filter(archive='True')
     context_dict={'archiveRequests': archiveRequests}
-    return render(request, 
+    return render(request,
         'app/archive_requests.html',context_dict
         )
 
@@ -1190,7 +1230,7 @@ def licenseRequests(request, license_id=None):
             LicenseRequest.objects.filter(pk=license_id).update(archive=archive)
     licenseRequests = LicenseRequest.objects.filter(archive='False')
     context_dict={'licenseRequests': licenseRequests}
-    return render(request, 
+    return render(request,
         'app/license_requests.html',context_dict
         )
 
@@ -1210,12 +1250,16 @@ def update_session_variables(request):
         return HttpResponse(response, status=400)
     return HttpResponse("Bad Request", status=400)
 
+@ratelimit(key='user_or_ip', rate='100/h', method=['POST'])
 def pull_request(request):
     """ View that handles pull request """
     if request.user.is_authenticated():
         if request.method=="POST":
             context_dict = {}
             ajaxdict = {}
+            was_limited = getattr(request, 'limited', False)
+            if was_limited:
+                return rate_limit_reponse(request)
             try:
                 if request.user.is_authenticated():
                     user = request.user
diff --git a/src/src/settings.py b/src/src/settings.py
index 38716c8e..6326f07d 100644
--- a/src/src/settings.py
+++ b/src/src/settings.py
@@ -181,7 +181,15 @@
     'DEFAULT_RENDERER_CLASSES': (
         'rest_framework.renderers.JSONRenderer',
         'rest_framework.renderers.BrowsableAPIRenderer',
-    )
+    ),
+    'DEFAULT_THROTTLE_CLASSES': (
+        'rest_framework.throttling.AnonRateThrottle',
+        'rest_framework.throttling.UserRateThrottle'
+    ),
+    'DEFAULT_THROTTLE_RATES': {
+        'anon': '100/hour',
+        'user': '100/hour'
+    }
 }
 
 # Absolute Path for tool.jar