diff --git a/native/chat/chat-input-bar.react.js b/native/chat/chat-input-bar.react.js
--- a/native/chat/chat-input-bar.react.js
+++ b/native/chat/chat-input-bar.react.js
@@ -46,6 +46,7 @@
   draftKeyFromThreadID,
   colorIsDark,
 } from 'lib/shared/thread-utils';
+import { getTypeaheadUserSuggestions } from 'lib/shared/typeahead-utils';
 import type { CalendarQuery } from 'lib/types/entry-types';
 import type { LoadingStatus } from 'lib/types/loading-types';
 import type { PhotoPaste } from 'lib/types/media-types';
@@ -91,8 +92,10 @@
 import { type AnimatedViewStyle, AnimatedView } from '../types/styles';
 import { runTiming } from '../utils/animation-utils';
 import { waitForAnimationFrameFlush } from '../utils/timers';
+import { nativeTypeaheadRegex } from '../utils/typeahead-utils';
 import { ChatContext } from './chat-context';
 import type { ChatNavigationProp } from './chat.react';
+import TypeaheadTooltip from './typeahead-tooltip.react';
 
 /* eslint-disable import/no-named-as-default-member */
 const {
@@ -528,6 +531,56 @@
       );
     }
 
+    // we only try to match if there is end of text or whitespace after cursor
+    let typeaheadRegexMatches = null;
+    if (
+      this.state.selection.start === this.state.selection.end &&
+      (this.state.selection.start === this.state.text.length ||
+        /\s/.test(this.state.text[this.state.selection.end]))
+    ) {
+      typeaheadRegexMatches = this.state.text
+        .slice(0, this.state.selection.start)
+        .match(nativeTypeaheadRegex);
+    }
+
+    if (
+      this.androidPreviousText &&
+      this.state.selection.start === this.state.selection.end &&
+      (this.state.selection.start === this.androidPreviousText.length ||
+        /\s/.test(this.androidPreviousText[this.state.selection.end]))
+    ) {
+      typeaheadRegexMatches = this.androidPreviousText
+        .slice(0, this.state.selection.start)
+        .match(nativeTypeaheadRegex);
+    }
+
+    let typeaheadTooltip = null;
+
+    if (typeaheadRegexMatches) {
+      const typeaheadMatchedStrings = {
+        textBeforeAtSymbol: typeaheadRegexMatches[1] ?? '',
+        usernamePrefix: typeaheadRegexMatches[4] ?? '',
+      };
+
+      const suggestedUsers = getTypeaheadUserSuggestions(
+        this.props.userSearchIndex,
+        this.props.threadMembers,
+        this.props.viewerID,
+        typeaheadMatchedStrings.usernamePrefix,
+      );
+
+      if (suggestedUsers.length > 0) {
+        typeaheadTooltip = (
+          <TypeaheadTooltip
+            text={this.state.text}
+            matchedStrings={typeaheadMatchedStrings}
+            suggestedUsers={suggestedUsers}
+            focusAndUpdateTextAndSelection={this.focusAndUpdateTextAndSelection}
+          />
+        );
+      }
+    }
+
     let content;
     const defaultMembersAreVoiced = checkIfDefaultMembersAreVoiced(
       this.props.threadInfo,
@@ -573,6 +626,7 @@
         style={this.props.styles.container}
         onLayout={this.props.onInputBarLayout}
       >
+        {typeaheadTooltip}
         {joinButton}
         {content}
         {keyboardInputHost}