diff --git a/native/chat/chat-thread-list.react.js b/native/chat/chat-thread-list.react.js
index 09edd93a8..beb8fbc65 100644
--- a/native/chat/chat-thread-list.react.js
+++ b/native/chat/chat-thread-list.react.js
@@ -1,503 +1,472 @@
 // @flow
 
 import IonIcon from '@expo/vector-icons/Ionicons.js';
 import invariant from 'invariant';
 import * as React from 'react';
 import {
   View,
   FlatList,
   Platform,
   TouchableWithoutFeedback,
   BackHandler,
 } from 'react-native';
 import { FloatingAction } from 'react-native-floating-action';
 
-import { searchUsers as searchUsersEndpoint } from 'lib/actions/user-actions.js';
 import { useLoggedInUserInfo } from 'lib/hooks/account-hooks.js';
 import {
   type ChatThreadItem,
   useFlattenedChatListData,
 } from 'lib/selectors/chat-selectors.js';
-import { useGlobalThreadSearchIndex } from 'lib/selectors/nav-selectors.js';
-import { usersWithPersonalThreadSelector } from 'lib/selectors/user-selectors.js';
 import {
   createPendingThread,
   getThreadListSearchResults,
+  useThreadListSearch,
 } from 'lib/shared/thread-utils.js';
 import { threadTypes } from 'lib/types/thread-types-enum.js';
 import type { ThreadInfo } from 'lib/types/thread-types.js';
-import type { GlobalAccountUserInfo, UserInfo } from 'lib/types/user-types.js';
-import { useServerCall } from 'lib/utils/action-utils.js';
+import type { UserInfo } from 'lib/types/user-types.js';
 
 import { ChatThreadListItem } from './chat-thread-list-item.react.js';
 import ChatThreadListSearch from './chat-thread-list-search.react.js';
 import { getItemLayout, keyExtractor } from './chat-thread-list-utils.js';
 import type {
   ChatTopTabsNavigationProp,
   ChatNavigationProp,
 } from './chat.react.js';
 import { useNavigateToThread } from './message-list-types.js';
 import {
   SidebarListModalRouteName,
   HomeChatThreadListRouteName,
   BackgroundChatThreadListRouteName,
   type NavigationRoute,
 } from '../navigation/route-names.js';
 import type { TabNavigationProp } from '../navigation/tab-navigator.react.js';
 import { useSelector } from '../redux/redux-utils.js';
 import { indicatorStyleSelector, useStyles } from '../themes/colors.js';
 import type { ScrollEvent } from '../types/react-native.js';
 
 const floatingActions = [
   {
     text: 'Compose',
     icon: <IonIcon name="md-create" size={24} color="#FFFFFF" />,
     name: 'compose',
     position: 1,
   },
 ];
 
 export type Item =
   | ChatThreadItem
   | { +type: 'search', +searchText: string }
   | { +type: 'empty', +emptyItem: React.ComponentType<{}> };
 
 type BaseProps = {
   +navigation:
     | ChatTopTabsNavigationProp<'HomeChatThreadList'>
     | ChatTopTabsNavigationProp<'BackgroundChatThreadList'>,
   +route:
     | NavigationRoute<'HomeChatThreadList'>
     | NavigationRoute<'BackgroundChatThreadList'>,
   +filterThreads: (threadItem: ThreadInfo) => boolean,
   +emptyItem?: React.ComponentType<{}>,
 };
 export type SearchStatus = 'inactive' | 'activating' | 'active';
 
 function ChatThreadList(props: BaseProps): React.Node {
   const boundChatListData = useFlattenedChatListData();
   const loggedInUserInfo = useLoggedInUserInfo();
-  const threadSearchIndex = useGlobalThreadSearchIndex();
   const styles = useStyles(unboundStyles);
   const indicatorStyle = useSelector(indicatorStyleSelector);
-  const callSearchUsers = useServerCall(searchUsersEndpoint);
-  const usersWithPersonalThread = useSelector(usersWithPersonalThreadSelector);
 
   const navigateToThread = useNavigateToThread();
 
   const { navigation, route, filterThreads, emptyItem } = props;
 
   const [searchText, setSearchText] = React.useState<string>('');
   const [searchStatus, setSearchStatus] =
     React.useState<SearchStatus>('inactive');
 
-  const [threadsSearchResults, setThreadsSearchResults] = React.useState<
-    Set<string>,
-  >(new Set());
-
-  const [usersSearchResults, setUsersSearchResults] = React.useState<
-    $ReadOnlyArray<GlobalAccountUserInfo>,
-  >([]);
+  const { threadSearchResults, usersSearchResults } = useThreadListSearch(
+    boundChatListData,
+    searchText,
+    loggedInUserInfo?.id,
+  );
 
   const [openedSwipeableID, setOpenedSwipeableID] = React.useState<string>('');
   const [numItemsToDisplay, setNumItemsToDisplay] = React.useState<number>(25);
 
-  const searchUsers = React.useCallback(
-    async (usernamePrefix: string) => {
-      if (usernamePrefix.length === 0) {
-        return [];
-      }
-
-      const { userInfos } = await callSearchUsers(usernamePrefix);
-      return userInfos.filter(
-        info =>
-          !usersWithPersonalThread.has(info.id) &&
-          info.id !== loggedInUserInfo?.id,
-      );
-    },
-    [callSearchUsers, loggedInUserInfo?.id, usersWithPersonalThread],
-  );
-
-  const onChangeSearchText = React.useCallback(
-    async (updatedSearchText: string) => {
-      const results = threadSearchIndex.getSearchResults(updatedSearchText);
-      setSearchText(updatedSearchText);
-      setThreadsSearchResults(new Set(results));
-      setNumItemsToDisplay(25);
-      const searchResults = await searchUsers(updatedSearchText);
-      setUsersSearchResults(searchResults);
-    },
-    [searchUsers, threadSearchIndex],
-  );
+  const onChangeSearchText = React.useCallback((updatedSearchText: string) => {
+    setSearchText(updatedSearchText);
+    setNumItemsToDisplay(25);
+  }, []);
 
   const scrollPos = React.useRef(0);
   const flatListRef = React.useRef();
 
   const onScroll = React.useCallback(
     (event: ScrollEvent) => {
       const oldScrollPos = scrollPos.current;
       scrollPos.current = event.nativeEvent.contentOffset.y;
       if (scrollPos.current !== 0 || oldScrollPos === 0) {
         return;
       }
       if (searchStatus === 'activating') {
         setSearchStatus('active');
       }
     },
     [searchStatus],
   );
 
   const onSwipeableWillOpen = React.useCallback(
     (threadInfo: ThreadInfo) => setOpenedSwipeableID(threadInfo.id),
     [],
   );
 
   const composeThread = React.useCallback(() => {
     if (!loggedInUserInfo) {
       return;
     }
     const threadInfo = createPendingThread({
       viewerID: loggedInUserInfo.id,
       threadType: threadTypes.PRIVATE,
       members: [loggedInUserInfo],
     });
     navigateToThread({ threadInfo, searching: true });
   }, [loggedInUserInfo, navigateToThread]);
 
   const onSearchFocus = React.useCallback(() => {
     if (searchStatus !== 'inactive') {
       return;
     }
     if (scrollPos.current === 0) {
       setSearchStatus('active');
     } else {
       setSearchStatus('activating');
     }
   }, [searchStatus]);
 
   const clearSearch = React.useCallback(() => {
     if (scrollPos.current > 0 && flatListRef.current) {
       flatListRef.current.scrollToOffset({ offset: 0, animated: false });
     }
     setSearchStatus('inactive');
   }, []);
 
   const onSearchBlur = React.useCallback(() => {
     if (searchStatus !== 'active') {
       return;
     }
     clearSearch();
   }, [clearSearch, searchStatus]);
 
   const onSearchCancel = React.useCallback(() => {
     onChangeSearchText('');
     clearSearch();
   }, [clearSearch, onChangeSearchText]);
 
   const searchInputRef = React.useRef();
 
   const onPressItem = React.useCallback(
     (threadInfo: ThreadInfo, pendingPersonalThreadUserInfo?: UserInfo) => {
       onChangeSearchText('');
       if (searchInputRef.current) {
         searchInputRef.current.blur();
       }
       navigateToThread({ threadInfo, pendingPersonalThreadUserInfo });
     },
     [navigateToThread, onChangeSearchText],
   );
 
   const onPressSeeMoreSidebars = React.useCallback(
     (threadInfo: ThreadInfo) => {
       onChangeSearchText('');
       if (searchInputRef.current) {
         this.searchInputRef.current.blur();
       }
       navigation.navigate<'SidebarListModal'>({
         name: SidebarListModalRouteName,
         params: { threadInfo },
       });
     },
     [navigation, onChangeSearchText],
   );
 
   const hardwareBack = React.useCallback(() => {
     if (!navigation.isFocused()) {
       return false;
     }
     const isActiveOrActivating =
       searchStatus === 'active' || searchStatus === 'activating';
     if (!isActiveOrActivating) {
       return false;
     }
 
     onSearchCancel();
     return true;
   }, [navigation, onSearchCancel, searchStatus]);
 
   const searchItem = React.useMemo(
     () => (
       <TouchableWithoutFeedback onPress={onSearchFocus}>
         <View style={styles.searchContainer}>
           <ChatThreadListSearch
             searchText={searchText}
             onChangeText={onChangeSearchText}
             onBlur={onSearchBlur}
             searchStatus={searchStatus}
             onSearchCancel={onSearchCancel}
             innerSearchActive={false}
             ref={searchInputRef}
           />
         </View>
       </TouchableWithoutFeedback>
     ),
     [
       onChangeSearchText,
       onSearchBlur,
       onSearchCancel,
       onSearchFocus,
       searchStatus,
       searchText,
       styles.searchContainer,
     ],
   );
 
   const renderItem = React.useCallback(
     (row: { item: Item, ... }) => {
       const item = row.item;
       if (item.type === 'search') {
         return searchItem;
       }
       if (item.type === 'empty') {
         const EmptyItem = item.emptyItem;
         return <EmptyItem />;
       }
       return (
         <ChatThreadListItem
           data={item}
           onPressItem={onPressItem}
           onPressSeeMoreSidebars={onPressSeeMoreSidebars}
           onSwipeableWillOpen={onSwipeableWillOpen}
           currentlyOpenedSwipeableId={openedSwipeableID}
         />
       );
     },
     [
       onPressItem,
       onPressSeeMoreSidebars,
       onSwipeableWillOpen,
       openedSwipeableID,
       searchItem,
     ],
   );
 
   const listData: $ReadOnlyArray<Item> = React.useMemo(() => {
     const chatThreadItems = getThreadListSearchResults(
       boundChatListData,
       searchText,
       filterThreads,
-      threadsSearchResults,
+      threadSearchResults,
       usersSearchResults,
       loggedInUserInfo,
     );
 
     const chatItems: Item[] = [...chatThreadItems];
 
     if (emptyItem && chatItems.length === 0) {
       chatItems.push({ type: 'empty', emptyItem });
     }
 
     if (searchStatus === 'inactive' || searchStatus === 'activating') {
       chatItems.unshift({ type: 'search', searchText });
     }
 
     return chatItems;
   }, [
     boundChatListData,
     emptyItem,
     filterThreads,
     loggedInUserInfo,
     searchStatus,
     searchText,
-    threadsSearchResults,
+    threadSearchResults,
     usersSearchResults,
   ]);
 
   const partialListData: $ReadOnlyArray<Item> = React.useMemo(
     () => listData.slice(0, numItemsToDisplay),
     [listData, numItemsToDisplay],
   );
 
   const onEndReached = React.useCallback(() => {
     if (partialListData.length === listData.length) {
       return;
     }
     setNumItemsToDisplay(prevNumItems => prevNumItems + 25);
   }, [listData.length, partialListData.length]);
 
   const floatingAction = React.useMemo(() => {
     if (Platform.OS !== 'android') {
       return null;
     }
     return (
       <FloatingAction
         actions={floatingActions}
         overrideWithAction
         onPressItem={composeThread}
         color="#7e57c2"
       />
     );
   }, [composeThread]);
 
   const fixedSearch = React.useMemo(() => {
     if (searchStatus !== 'active') {
       return null;
     }
     return (
       <View style={styles.searchContainer}>
         <ChatThreadListSearch
           searchText={searchText}
           onChangeText={onChangeSearchText}
           onBlur={onSearchBlur}
           searchStatus={searchStatus}
           onSearchCancel={onSearchCancel}
           innerSearchAutoFocus={true}
           ref={searchInputRef}
         />
       </View>
     );
   }, [
     onChangeSearchText,
     onSearchBlur,
     onSearchCancel,
     searchStatus,
     searchText,
     styles.searchContainer,
   ]);
 
   const scrollEnabled =
     searchStatus === 'inactive' || searchStatus === 'active';
   // viewerID is in extraData since it's used by MessagePreview
   // within ChatThreadListItem
   const viewerID = loggedInUserInfo?.id;
   const extraData = `${viewerID || ''} ${openedSwipeableID}`;
 
   const chatThreadList = React.useMemo(
     () => (
       <View style={styles.container}>
         {fixedSearch}
         <FlatList
           data={partialListData}
           renderItem={renderItem}
           keyExtractor={keyExtractor}
           getItemLayout={getItemLayout}
           extraData={extraData}
           initialNumToRender={11}
           keyboardShouldPersistTaps="handled"
           onScroll={onScroll}
           style={styles.flatList}
           indicatorStyle={indicatorStyle}
           scrollEnabled={scrollEnabled}
           onEndReached={onEndReached}
           onEndReachedThreshold={1}
           ref={flatListRef}
         />
         {floatingAction}
       </View>
     ),
     [
       extraData,
       fixedSearch,
       floatingAction,
       indicatorStyle,
       onEndReached,
       onScroll,
       partialListData,
       renderItem,
       scrollEnabled,
       styles.container,
       styles.flatList,
     ],
   );
 
   const onTabPress = React.useCallback(() => {
     if (!navigation.isFocused()) {
       return;
     }
     if (scrollPos.current > 0 && flatListRef.current) {
       flatListRef.current.scrollToOffset({ offset: 0, animated: true });
     } else if (route.name === BackgroundChatThreadListRouteName) {
       navigation.navigate({ name: HomeChatThreadListRouteName });
     }
   }, [navigation, route.name]);
 
   React.useEffect(() => {
     const clearNavigationBlurListener = navigation.addListener('blur', () => {
       setNumItemsToDisplay(25);
     });
 
     return () => {
       // `.addListener` returns function that can be called to unsubscribe.
       // https://reactnavigation.org/docs/navigation-events/#navigationaddlistener
       clearNavigationBlurListener();
     };
   }, [navigation]);
 
   React.useEffect(() => {
     const chatNavigation: ?ChatNavigationProp<'ChatThreadList'> =
       navigation.getParent();
     invariant(chatNavigation, 'ChatNavigator should be within TabNavigator');
     const tabNavigation: ?TabNavigationProp<'Chat'> =
       chatNavigation.getParent();
     invariant(tabNavigation, 'ChatNavigator should be within TabNavigator');
 
     tabNavigation.addListener('tabPress', onTabPress);
 
     return () => {
       tabNavigation.removeListener('tabPress', onTabPress);
     };
   }, [navigation, onTabPress]);
 
   React.useEffect(() => {
     BackHandler.addEventListener('hardwareBackPress', hardwareBack);
     return () => {
       BackHandler.removeEventListener('hardwareBackPress', hardwareBack);
     };
   }, [hardwareBack]);
 
   React.useEffect(() => {
     if (scrollPos.current > 0 && flatListRef.current) {
       flatListRef.current.scrollToOffset({ offset: 0, animated: false });
     }
   }, [searchText]);
 
   const isSearchActivating = searchStatus === 'activating';
   React.useEffect(() => {
     if (isSearchActivating && scrollPos.current > 0 && flatListRef.current) {
       flatListRef.current.scrollToOffset({ offset: 0, animated: true });
     }
   }, [isSearchActivating]);
 
   return chatThreadList;
 }
 
 const unboundStyles = {
   icon: {
     fontSize: 28,
   },
   container: {
     flex: 1,
   },
   searchContainer: {
     backgroundColor: 'listBackground',
     display: 'flex',
     justifyContent: 'center',
     flexDirection: 'row',
   },
   flatList: {
     flex: 1,
     backgroundColor: 'listBackground',
   },
 };
 
 export default ChatThreadList;