diff --git a/landing/competitor-data.js b/landing/competitor-data.js
--- a/landing/competitor-data.js
+++ b/landing/competitor-data.js
@@ -1,5 +1,15 @@
 // @flow
 
+const competitors = Object.freeze({
+  DISCORD: 'discord',
+  KEYBASE: 'keybase',
+  MATRIX: 'matrix',
+  SIGNAL: 'signal',
+  SLACK: 'slack',
+  TELEGRAM: 'telegram',
+});
+export type Competitors = $Values<typeof competitors>;
+
 type FeatureComparison = {
   +title: string,
   +comingSoon: boolean,
@@ -11,7 +21,7 @@
 };
 
 type Competitor = {
-  +id: string,
+  +id: Competitors,
   +name: string,
   +featureComparison: $ReadOnlyArray<FeatureComparison>,
 };
diff --git a/landing/competitor-logo.react.js b/landing/competitor-logo.react.js
--- a/landing/competitor-logo.react.js
+++ b/landing/competitor-logo.react.js
@@ -8,9 +8,10 @@
 import SignalLogo from './assets/signal-logo.react.js';
 import SlackLogo from './assets/slack-logo.react.js';
 import TelegramLogo from './assets/telegram-logo.react.js';
+import type { Competitors } from './competitor-data.js';
 
 type Props = {
-  +name: 'discord' | 'keybase' | 'matrix' | 'signal' | 'slack' | 'telegram',
+  +name: Competitors,
   +size?: number,
 };