diff --git a/src/platform/telemetry/providers/cloud/MixpanelTelemetryProvider.test.ts b/src/platform/telemetry/providers/cloud/MixpanelTelemetryProvider.test.ts
index a5f507b77b..58013c888a 100644
--- a/src/platform/telemetry/providers/cloud/MixpanelTelemetryProvider.test.ts
+++ b/src/platform/telemetry/providers/cloud/MixpanelTelemetryProvider.test.ts
@@ -75,6 +75,7 @@ const waitForMixpanelInit = () =>
   vi.waitFor(() => expect(mockMixpanel.init).toHaveBeenCalled())
 
 type ConfigWindow = { __CONFIG__?: { mixpanel_token?: string } }
+type DefineGlobal = typeof globalThis & { __DEV_SERVER_COMFYUI_URL__: string }
 
 describe('MixpanelTelemetryProvider — without configured token', () => {
   beforeEach(() => {
@@ -103,6 +104,7 @@ describe('MixpanelTelemetryProvider — without configured token', () => {
 describe('MixpanelTelemetryProvider — with configured token', () => {
   beforeEach(() => {
     vi.clearAllMocks()
+    ;(globalThis as DefineGlobal).__DEV_SERVER_COMFYUI_URL__ = ''
     ;(window as unknown as ConfigWindow).__CONFIG__ = {
       mixpanel_token: 'test-token'
     }
@@ -112,6 +114,26 @@ describe('MixpanelTelemetryProvider — with configured token', () => {
     mockNormalizeSurveyResponses.mockImplementation((responses) => responses)
   })
 
+  it('does not initialize Mixpanel for loopback cloud dev', () => {
+    ;(globalThis as DefineGlobal).__DEV_SERVER_COMFYUI_URL__ =
+      'http://localhost:8188'
+    const warn = vi.spyOn(console, 'warn').mockImplementation(() => undefined)
+
+    try {
+      const provider = new MixpanelTelemetryProvider()
+      provider.trackUserLoggedIn()
+
+      expect(warn).toHaveBeenCalledWith(
+        expect.stringContaining('disabled in local cloud dev')
+      )
+      expect(mockMixpanel.init).not.toHaveBeenCalled()
+      expect(mockMixpanel.track).not.toHaveBeenCalled()
+    } finally {
+      warn.mockRestore()
+      ;(globalThis as DefineGlobal).__DEV_SERVER_COMFYUI_URL__ = ''
+    }
+  })
+
   it('initializes Mixpanel and tracks events synchronously after the loaded callback fires', async () => {
     const provider = new MixpanelTelemetryProvider()
     await waitForMixpanelInit()
diff --git a/src/platform/telemetry/providers/cloud/MixpanelTelemetryProvider.ts b/src/platform/telemetry/providers/cloud/MixpanelTelemetryProvider.ts
index 3a7fe9b20c..d7adc7b633 100644
--- a/src/platform/telemetry/providers/cloud/MixpanelTelemetryProvider.ts
+++ b/src/platform/telemetry/providers/cloud/MixpanelTelemetryProvider.ts
@@ -69,6 +69,8 @@ const DEFAULT_DISABLED_EVENTS = [
 const TELEMETRY_EVENT_SET = new Set<TelemetryEventName>(
   Object.values(TelemetryEvents) as TelemetryEventName[]
 )
+const localOriginPattern =
+  /^https?:\/\/(localhost|127\.0\.0\.1|\[::1\])(?::\d+)?(?:\/|$)/
 
 interface QueuedEvent {
   eventName: TelemetryEventName
@@ -96,6 +98,12 @@ export class MixpanelTelemetryProvider implements TelemetryProvider {
   private disabledEvents = new Set<TelemetryEventName>(DEFAULT_DISABLED_EVENTS)
 
   constructor() {
+    if (isLocalCloudDev()) {
+      console.warn('Mixpanel telemetry disabled in local cloud dev')
+      this.isEnabled = false
+      return
+    }
+
     this.configureDisabledEvents(
       (window.__CONFIG__ as Partial<RemoteConfig> | undefined) ?? null
     )
@@ -446,3 +454,9 @@ export class MixpanelTelemetryProvider implements TelemetryProvider {
     this.trackEvent(TelemetryEvents.UI_BUTTON_CLICKED, metadata)
   }
 }
+
+function isLocalCloudDev(): boolean {
+  return (
+    import.meta.env.DEV && localOriginPattern.test(__DEV_SERVER_COMFYUI_URL__)
+  )
+}