diff --git a/src/chrome/WarningEmployee.tsx b/src/chrome/WarningEmployee.tsx
new file mode 100644
index 000000000..f9ced1d92
--- /dev/null
+++ b/src/chrome/WarningEmployee.tsx
@@ -0,0 +1,55 @@
+/**
+ * Copyright 2019-present Facebook.
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ * @format
+ */
+
+import {styled, FlexColumn, Text, Button, colors} from 'flipper';
+
+import React from 'react';
+
+const Container = styled(FlexColumn)({
+  height: '100%',
+  width: '100%',
+  justifyContent: 'center',
+  alignItems: 'center',
+  backgroundColor: colors.light02,
+});
+
+const Box = styled(FlexColumn)({
+  justifyContent: 'center',
+  alignItems: 'center',
+  background: colors.white,
+  borderRadius: 10,
+  boxShadow: '0 1px 3px rgba(0,0,0,0.25)',
+  paddingBottom: 16,
+});
+
+const Warning = styled(Text)({
+  fontSize: 24,
+  fontWeight: 300,
+  textAlign: 'center',
+  margin: 16,
+});
+
+const AckButton = styled(Button)({
+  type: 'warning',
+});
+
+export default function WarningEmployee(props: {
+  onClick: (event: React.MouseEvent) => any;
+}) {
+  return (
+    <Container>
+      <Box>
+        <Warning>
+          You are using the open-source version of Flipper. You will get access
+          to more plugins. To use the internal version, please install it from
+          Managed Software Center
+        </Warning>
+        <AckButton onClick={props.onClick}>Okay</AckButton>
+      </Box>
+    </Container>
+  );
+}
diff --git a/src/fb-stubs/config.tsx b/src/fb-stubs/config.tsx
index 2de59bef7..6edb5c1fe 100644
--- a/src/fb-stubs/config.tsx
+++ b/src/fb-stubs/config.tsx
@@ -10,4 +10,5 @@ export default {
   bugReportButtonVisible: false,
   showLogin: false,
   showFlipperRating: false,
+  warnFBEmployees: true,
 };
diff --git a/src/init.js b/src/init.js
index 244b8e2d7..fd88f165c 100644
--- a/src/init.js
+++ b/src/init.js
@@ -7,6 +7,7 @@
 
 import {Provider} from 'react-redux';
 import ReactDOM from 'react-dom';
+import {useState, useEffect} from 'react';
 import {ContextMenuProvider} from 'flipper';
 import GK from './fb-stubs/GK.tsx';
 import {init as initLogger} from './fb-stubs/Logger.tsx';
@@ -22,7 +23,10 @@ import config from './utils/processConfig.tsx';
 import {stateSanitizer} from './utils/reduxDevToolsConfig.tsx';
 import {initLauncherHooks} from './utils/launcher.tsx';
 import initCrashReporter from './utils/electronCrashReporter.tsx';
+import fbConfig from './fb-stubs/config.tsx';
+import {isFBEmployee} from './utils/fbEmployee.js';
 import path from 'path';
+import WarningEmployee from './chrome/WarningEmployee.tsx';
 
 const store = createStore(
   reducers,
@@ -35,15 +39,34 @@ const bugReporter = new BugReporter(logger, store);
 
 GK.init();
 
-const AppFrame = () => (
-  <TooltipProvider>
-    <ContextMenuProvider>
-      <Provider store={store}>
-        <App logger={logger} bugReporter={bugReporter} />
-      </Provider>
-    </ContextMenuProvider>
-  </TooltipProvider>
-);
+const AppFrame = () => {
+  const [warnEmployee, setWarnEmployee] = useState(false);
+  useEffect(() => {
+    if (fbConfig.warnFBEmployees) {
+      isFBEmployee().then(isEmployee => {
+        setWarnEmployee(isEmployee);
+      });
+    }
+  }, []);
+
+  return (
+    <TooltipProvider>
+      <ContextMenuProvider>
+        <Provider store={store}>
+          {warnEmployee ? (
+            <WarningEmployee
+              onClick={e => {
+                setWarnEmployee(false);
+              }}
+            />
+          ) : (
+            <App logger={logger} bugReporter={bugReporter} />
+          )}
+        </Provider>
+      </ContextMenuProvider>
+    </TooltipProvider>
+  );
+};
 
 function init() {
   // $FlowFixMe: this element exists!
diff --git a/src/utils/fbEmployee.js b/src/utils/fbEmployee.js
new file mode 100644
index 000000000..4641d34df
--- /dev/null
+++ b/src/utils/fbEmployee.js
@@ -0,0 +1,25 @@
+/**
+ * Copyright 2019-present Facebook.
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ * @format
+ */
+
+import util from 'util';
+const exec = util.promisify(require('child_process').exec);
+
+const cmd = 'klist --json';
+const endWith = '@THEFACEBOOK.COM';
+
+export function isFBEmployee(): Promise<boolean> {
+  return exec(cmd).then(
+    (stdobj: {stderr: string, stdout: string}) => {
+      const principal = String(JSON.parse(stdobj.stdout).principal);
+
+      return principal.endsWith(endWith);
+    },
+    err => {
+      return false;
+    },
+  );
+}