diff --git a/web/modals/threads/subchannels/subchannels-modal.css b/web/modals/threads/subchannels/subchannels-modal.css
--- a/web/modals/threads/subchannels/subchannels-modal.css
+++ b/web/modals/threads/subchannels/subchannels-modal.css
@@ -1,3 +1,16 @@
+div.subchannelsListContainer {
+  display: flex;
+  flex-direction: column;
+  overflow: scroll;
+  line-height: var(--line-height-text);
+  color: var(--subchannels-modal-color);
+  row-gap: 8px;
+}
+
+div.noSubchannels {
+  text-align: center;
+}
+
 div.subchannelContainer {
   cursor: pointer;
   display: flex;
diff --git a/web/modals/threads/subchannels/subchannels-modal.react.js b/web/modals/threads/subchannels/subchannels-modal.react.js
new file mode 100644
--- /dev/null
+++ b/web/modals/threads/subchannels/subchannels-modal.react.js
@@ -0,0 +1,99 @@
+// @flow
+
+import * as React from 'react';
+
+import { useFilteredChatListData } from 'lib/selectors/chat-selectors';
+import { threadSearchIndex } from 'lib/selectors/nav-selectors';
+import { childThreadInfos } from 'lib/selectors/thread-selectors';
+import { threadIsChannel } from 'lib/shared/thread-utils';
+
+import { useSelector } from '../../../redux/redux-utils';
+import SearchModal from '../../search-modal.react';
+import Subchannel from './subchannel.react';
+import css from './subchannels-modal.css';
+
+type ContentProps = {
+  +searchText: string,
+  +threadID: string,
+};
+
+function SubchannelsModalContent(props: ContentProps): React.Node {
+  const { searchText, threadID } = props;
+  const childThreads = useSelector(state => childThreadInfos(state)[threadID]);
+  const subchannelIDs = React.useMemo(() => {
+    if (!childThreads) {
+      return new Set();
+    }
+    return new Set(
+      childThreads.filter(threadIsChannel).map(threadInfo => threadInfo.id),
+    );
+  }, [childThreads]);
+
+  const filterSubchannels = React.useCallback(
+    thread => subchannelIDs.has(thread?.id),
+    [subchannelIDs],
+  );
+  const allSubchannelsChatList = useFilteredChatListData(filterSubchannels);
+
+  const searchIndex = useSelector(threadSearchIndex);
+
+  const searchResultIDs = React.useMemo(
+    () => searchIndex.getSearchResults(searchText),
+    [searchIndex, searchText],
+  );
+
+  const searchTextExists = !!searchText.length;
+  const filteredSubchannelsChatList = React.useMemo(() => {
+    if (!searchTextExists) {
+      return allSubchannelsChatList;
+    }
+    return allSubchannelsChatList.filter(item =>
+      searchResultIDs.includes(item.threadInfo.id),
+    );
+  }, [allSubchannelsChatList, searchResultIDs, searchTextExists]);
+
+  const subchannels = React.useMemo(() => {
+    if (!filteredSubchannelsChatList.length) {
+      return (
+        <div className={css.noSubchannels}>
+          No matching subchannels were found in the thread!
+        </div>
+      );
+    }
+    return filteredSubchannelsChatList.map(childThreadItem => (
+      <Subchannel
+        chatThreadItem={childThreadItem}
+        key={childThreadItem.threadInfo.id}
+      />
+    ));
+  }, [filteredSubchannelsChatList]);
+
+  return <div className={css.subchannelsListContainer}>{subchannels}</div>;
+}
+type Props = {
+  +threadID: string,
+  +onClose: () => void,
+};
+
+function SubchannelsModal(props: Props): React.Node {
+  const { threadID, onClose } = props;
+
+  const subchannelsContent = React.useCallback(
+    (searchText: string) => (
+      <SubchannelsModalContent searchText={searchText} threadID={threadID} />
+    ),
+    [threadID],
+  );
+
+  return (
+    <SearchModal
+      name="Subchannels"
+      searchPlaceholder="Search"
+      onClose={onClose}
+    >
+      {subchannelsContent}
+    </SearchModal>
+  );
+}
+
+export default SubchannelsModal;