alt.chat vs StipaCaller

AltChat is a next-generation messenger that works over email. No new account, no phone number — just connect any existing email and start chatting. PRIVACY BY DEFAULT All messages are protected with end-to-end encryption (Autocrypt). Conversations are stored only on your device. WORKS WITH ANY EMAIL Gmail, Outlook, Yahoo, or corporate mail — AltChat works with any IMAP/SMTP provider. VOICE & VIDEO CALLS Make voice and video calls directly from the chat. Supports picture-in-picture and Bluetooth headsets. VIDEO NOTES Record and send short video messages — just like in the most popular messengers. MEDIA & FILES Send photos, videos, documents, and voice messages. Share your location. GROUP CHATS Create group conversations with anyone who has an email address. NO ADS, NO TRACKING No ads, no behavioral analytics, no third-party trackers.

StipaCaller is a small, invite-only messaging and calling app for closed groups — family, friends, anyone who wants their conversations to stay between the people who were invited. Every chat is end-to-end encrypted. Voice and video calls run over a self-hosted backend, not a third-party cloud. There are no ads, no algorithms, no public discovery, and no phone number required. Sign-in is by invite code only. New users join when someone already on the network invites them — there's no public sign-up form, and accounts can't be discovered by searching for a name or number. Designed for small networks where trust is direct and the surface area is intentionally small. Built for people who want a simple way to stay in touch without their conversations becoming someone else's training data. Features: • 1:1 and group chats with end-to-end encryption (libsodium) • Send and receive voice messages • Send and receive photos and videos • Voice and video calls over a self-hosted backend (1:1 only) • Invite-only — no public sign-up, no accounts findable by phone number • No ads, no telemetry, no third-party analytics • Username-based addressing — no phone number required