diff --git a/frontend/src/components/AccountMenu.tsx b/frontend/src/components/AccountMenu.tsx
index 03ffb22e..3c20b881 100644
--- a/frontend/src/components/AccountMenu.tsx
+++ b/frontend/src/components/AccountMenu.tsx
@@ -264,6 +264,14 @@ export function AccountMenu() {
         sessionStorage.removeItem("maple_billing_token");
       }
 
+      // Stop proxy and reset config so it doesn't auto-start on next launch
+      try {
+        const { proxyService } = await import("@/services/proxyService");
+        await proxyService.stopAndResetProxy();
+      } catch (error) {
+        console.error("Error clearing proxy config:", error);
+      }
+
       // Sign out from OpenSecret
       await os.signOut();
 
diff --git a/frontend/src/components/DeleteAccountDialog.tsx b/frontend/src/components/DeleteAccountDialog.tsx
index 63e966f2..2bf1351c 100644
--- a/frontend/src/components/DeleteAccountDialog.tsx
+++ b/frontend/src/components/DeleteAccountDialog.tsx
@@ -78,6 +78,14 @@ export function DeleteAccountDialog({ open, onOpenChange }: DeleteAccountDialogP
         sessionStorage.removeItem("maple_billing_token");
       }
 
+      // Stop proxy and reset config so it doesn't auto-start on next launch
+      try {
+        const { proxyService } = await import("@/services/proxyService");
+        await proxyService.stopAndResetProxy();
+      } catch (error) {
+        console.error("Error clearing proxy config:", error);
+      }
+
       // Sign out
       await os.signOut();
 
diff --git a/frontend/src/components/GuestPaymentWarningDialog.tsx b/frontend/src/components/GuestPaymentWarningDialog.tsx
index bae3767b..ac65ff63 100644
--- a/frontend/src/components/GuestPaymentWarningDialog.tsx
+++ b/frontend/src/components/GuestPaymentWarningDialog.tsx
@@ -24,6 +24,14 @@ export function GuestPaymentWarningDialog({ open, onOpenChange }: GuestPaymentWa
   };
 
   const handleLogout = async () => {
+    // Stop proxy and reset config so it doesn't auto-start on next launch
+    try {
+      const { proxyService } = await import("@/services/proxyService");
+      await proxyService.stopAndResetProxy();
+    } catch (error) {
+      console.error("Error clearing proxy config:", error);
+    }
+
     await os.signOut();
   };
 
diff --git a/frontend/src/components/VerificationModal.tsx b/frontend/src/components/VerificationModal.tsx
index 247f8c4a..948811d0 100644
--- a/frontend/src/components/VerificationModal.tsx
+++ b/frontend/src/components/VerificationModal.tsx
@@ -96,6 +96,18 @@ export function VerificationModal() {
     }
   };
 
+  const handleSignOut = async () => {
+    // Stop proxy and reset config so it doesn't auto-start on next launch
+    try {
+      const { proxyService } = await import("@/services/proxyService");
+      await proxyService.stopAndResetProxy();
+    } catch (error) {
+      console.error("Error clearing proxy config:", error);
+    }
+
+    await os.signOut();
+  };
+
   return (
     <Dialog open={isOpen} onOpenChange={handleOpenChange}>
       <DialogContent className="max-w-[calc(100vw-2rem)] sm:max-w-[425px] [&>button]:hidden">
@@ -148,7 +160,7 @@ export function VerificationModal() {
                 )}
               </Button>
             )}
-            <Button variant="outline" onClick={() => os.signOut()} className="gap-2">
+            <Button variant="outline" onClick={handleSignOut} className="gap-2">
               <LogOut className="w-4 h-4" />
               Log Out
             </Button>
diff --git a/frontend/src/services/proxyService.ts b/frontend/src/services/proxyService.ts
index c5777b9b..538c891f 100644
--- a/frontend/src/services/proxyService.ts
+++ b/frontend/src/services/proxyService.ts
@@ -86,6 +86,33 @@ class ProxyService {
     }
   }
 
+  // Stop proxy if running and reset saved config (used on logout)
+  async stopAndResetProxy(): Promise<void> {
+    try {
+      // Check if proxy is running and stop it
+      const status = await this.getProxyStatus();
+      if (status.running) {
+        await this.stopProxy();
+      }
+    } catch {
+      // Proxy may not be running, that's fine
+    }
+
+    try {
+      // Save default config to clear auto_start and API key
+      await this.saveProxySettings({
+        host: "127.0.0.1",
+        port: 8080,
+        api_key: "",
+        enabled: false,
+        enable_cors: true,
+        auto_start: false
+      });
+    } catch (error) {
+      console.error("Failed to reset proxy config:", error);
+    }
+  }
+
   // Helper to check if we're in Tauri desktop environment
   async isTauriDesktop(): Promise<boolean> {
     try {