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Fast, testable, Scala services built on TwitterServer and Finagle


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This project is used in production at Twitter (and many other organizations), and is being actively developed and maintained.

Finatra Logo

Finatra is a lightweight framework for building fast, testable, scala applications on top of TwitterServer and Finagle. Finatra provides an easy-to-use API for creating and testing Finagle servers and apps as well as powerful JSON support, modern logging via SLF4J, Finagle client utilities, and more.

Getting involved



To get started, see the Getting Started section of our User Guide to get up and running. Or check out the specific sections for building HTTP or Thrift servers.


An HTTP controller and server:

import com.twitter.finatra.http._

class ExampleController extends Controller {
  get("/") { request: Request =>
    "<h1>Hello, world!</h1>"
import com.twitter.finatra.http._

class ExampleServer extends HttpServer {
  override def configureHttp(router: HttpRouter): Unit = {

A Thrift controller and server:

import com.twitter.finatra.thrift._
import com.twitter.scrooge.{Request, Response}

class ExampleThriftController
  extends Controller(MyThriftService) {

  handle(MyFunction).withFn { request: Request[MyFunction.Args] =>
import com.twitter.finatra.thrift._

class ExampleServer extends ThriftServer {
  override def configureThrift(router: ThriftRouter): Unit = {

Example Projects

Finatra includes working examples which highlight various features of the framework and include tests. These examples are included in the root sbt build and are thus buildable as part of the entire project.

Please take a look through the examples for more detailed information on features, testing, building, and running.

Latest version

The release branch in Github tracks the latest stable release, which is currently:

Maven Central

available on Maven Central. See the First Steps section in the User Guide for how to add dependencies.

Releases are done on an approximately monthly schedule. While semver is not followed, the changelogs are detailed and include sections on public API breaks and changes in runtime behavior.

Development version

The develop branch in Github tracks the latest code which is updated every week. If you want to contribute a patch or fix, please use this branch as the basis of your Pull Request.

We feel that a welcoming community is important and we ask that you follow Twitter's Open Source Code of Conduct in all interactions with the community. For more information on providing contributions, please see our documentation.


Check out our list of presentations: Finatra Presentations.


A full list of contributors can be found on GitHub.

Follow @finatra on Twitter for updates.


Copyright 2013 Twitter, Inc.

Licensed under the Apache License, Version 2.0: