diff --git a/src/pages/DirectMessagesPage.tsx b/src/pages/DirectMessagesPage.tsx
index 3785211..771339b 100644
--- a/src/pages/DirectMessagesPage.tsx
+++ b/src/pages/DirectMessagesPage.tsx
@@ -80,8 +80,10 @@ function GroupPreview({ conversation }: { conversation: Conversation }) {
   const { t } = useTranslation();
   const participants = conversation.participants ?? [];
   const { user } = useCurrentUser();
+  const { getLastRead } = useDMRead();
   const last = conversation.lastMessage;
   const isFromMe = last?.pubkey === user?.pubkey;
+  const unread = !!last && !isFromMe && last.createdAt > getLastRead(conversation.pubkey);
   const timeAgo = last
     ? formatDistanceToNow(new Date(last.createdAt * 1000), { addSuffix: true })
     : '';
@@ -90,6 +92,7 @@ function GroupPreview({ conversation }: { conversation: Conversation }) {
     <Link to={`/messages/group/${participants.join(',')}`}>
       <Card className={cn(
         'hover:bg-gray-900/50 transition-colors cursor-pointer border-gray-800',
+        unread && 'border-[#ff0040]/40 bg-[#ff0040]/[0.04]',
         'hover:border-[#ccff00]/50 active:scale-[0.99]',
       )}>
         <CardContent className="p-3">
@@ -99,7 +102,10 @@ function GroupPreview({ conversation }: { conversation: Conversation }) {
             </div>
             <div className="min-w-0 flex-1">
               <div className="flex items-center justify-between gap-2">
-                <h3 className="truncate font-bold text-white">{t('socialUi.dms.peopleCount', { count: participants.length })}</h3>
+                <h3 className={cn('truncate font-bold text-white', unread && 'font-black')}>
+                  {t('socialUi.dms.peopleCount', { count: participants.length })}
+                  {unread && <span className="ml-2 inline-block h-1.5 w-1.5 rounded-full bg-[#ff0040]" aria-label={t('socialUi.dms.unreadMessages')} />}
+                </h3>
                 <span className="shrink-0 text-xs text-gray-500">{timeAgo}</span>
               </div>
               <p className="mt-0.5 truncate text-xs text-gray-500">
diff --git a/src/pages/GroupConversationPage.tsx b/src/pages/GroupConversationPage.tsx
index 78cbee7..04fb38b 100644
--- a/src/pages/GroupConversationPage.tsx
+++ b/src/pages/GroupConversationPage.tsx
@@ -11,7 +11,8 @@ import { useTranslation } from '@/contexts/language';
 import { useToast } from '@/hooks/useToast';
 import { useNostrLogin } from '@nostrify/react/login';
 import { hasNip44 as checkNip44 } from '@/lib/signerCapabilities';
-import { useGroupConversation, useSendDirectMessage } from '@/hooks/useDirectMessages';
+import { useGroupConversation, useSendDirectMessage, getGroupId } from '@/hooks/useDirectMessages';
+import { useDMRead } from '@/hooks/useDMRead';
 import { useAuthor } from '@/hooks/useAuthor';
 import { genUserName } from '@/lib/genUserName';
 import { formatDistanceToNow } from '@/lib/dateFnsI18n';
@@ -54,11 +55,20 @@ export default function GroupConversationPage() {
   useSeoMeta({ title: t('socialUi.groupConversation.seoTitle') });
 
   const { data: messages, isLoading, refetch, isRefetching } = useGroupConversation(allParticipants);
+  const { markRead } = useDMRead();
+  const groupId = useMemo(() => getGroupId(allParticipants), [allParticipants]);
 
   useEffect(() => {
     messagesEndRef.current?.scrollIntoView({ behavior: 'smooth' });
   }, [messages]);
 
+  // Opening a group marks it read up to its newest message, same as 1:1 DMs.
+  useEffect(() => {
+    if (!messages || messages.length === 0) return;
+    const newest = messages.reduce((max, message) => Math.max(max, message.createdAt), 0);
+    markRead(groupId, newest);
+  }, [groupId, markRead, messages]);
+
   if (!participantsParam || otherPubkeys.length === 0) {
     return (
       <>