A WhatsApp group or Mosaikin for your event photos?
A WhatsApp group is great for chat. For event photos it has gaps: everyone needs the app and has to be added, photos go out in Standard quality unless the sender picks HD, and they arrive among the messages with nothing checked first. Mosaikin gives the event one checked album, joined from a QR code.
Built in the UK, for UK celebrations. Run under UK law, with safeguarding built in as standard: every photo is checked before it is shown, and we report what the law says we must. You keep the lot, and share it as and when you like in a digital guestbook and album.
Side by side
| What is compared | WhatsApp group | Mosaikin |
|---|---|---|
| Joining | Every guest needs WhatsApp and must be added to the group or sent an invite link | Scan a QR code or open a link in the browser; no app, no account |
| Photo quality | Standard quality unless the sender chooses HD for that photo or in settings | Photos up to 4096 pixels on the longest edge; the browser resizes anything larger |
| Where photos end up | In the chat history, among the messages | One gallery for the event, with a live slideshow for a screen |
| Checked before it is shown | No: a message appears to the group when it is sent | Yes: every photo and message is checked first, and uncertain ones wait for the host |
| Removing something | Admins can delete another member’s message within two days of it being sent | The host or a moderator can hide or delete a photo at any time |
| Group size | Up to 1,024 members | No limit on guests; the plan sets the photo allowance |
| Afterwards | No album, slideshow or keepsake made from the chat | Full archive ZIP, printable guestbook and highlight reel on an upgraded event |
If a fact about WhatsApp on this page is out of date, tell us at hello@mosaikin.app and we will correct it within five working days.
Where WhatsApp is the better tool
Conversation. If the point is chatting before and after the day, a group chat does that well and Mosaikin does not try to. Plenty of hosts use both: the group for the chat, and the Mosaikin link pinned in it for the photos.
Where a group chat falls short for an event
- Not everyone is in it. The plus-ones, the colleagues and the friend of a friend are rarely in the group, and adding them means collecting numbers.
- Quality is left to each sender. Photos and videos go out in Standard quality unless the person sending chooses HD.
- Nothing is checked. Whatever a member sends appears for everyone at once; an admin can remove it afterwards, within two days.
- There is no album. The photos sit in the chat between the messages, and gathering them afterwards is a job for someone.
Those are exactly the jobs Mosaikin is built for. Guests scan one code, every photo is checked before it is shown, and the host keeps the whole album. See how it works, how to share photos from a party in one album, and Is Mosaikin safe? for what the checks are.
The occasions where the group chat is usually the alternative: parties, corporate events, schools and large events.
Questions people ask
Why not just use a WhatsApp group for wedding photos?
You can, and for a small group it works. The gaps show at an event: not every guest is in the group, photos go out in Standard quality unless the sender picks HD, nothing is checked before everyone sees it, and the photos end up scattered through the chat.
Can I use Mosaikin and a WhatsApp group together?
Yes. Share the Mosaikin link or QR code in the group, and guests tap it to add their photos to the event’s album.
Does Mosaikin compress photos?
Photos longer than 4096 pixels on their longest edge are resized in the browser before upload; a typical phone photo below that passes through at its own size. Every photo is re-saved without its camera metadata.
Do guests need WhatsApp or any other app to use Mosaikin?
No. Guests use their phone’s browser, with no app and no account.
Sources
- WhatsApp Help Centre, “About HD photos and videos”, read 5 October 2026
- WhatsApp Help Centre, “How to add and remove group members”, read 5 October 2026
- WhatsApp Help Centre, “How to delete messages”, read 5 October 2026
- Mosaikin competitor research, August 2026: app-store and Trustpilot reviews of other guest-photo apps, and vendor pricing pages read live on 14 and 15 August 2026.
Give your guests one album for the day
Creating an event is free, and guests never need an app or an account. Upgrade that one event for the whole album, every keepsake and room for thousands of photos.