Watch anything together without installing a thing. Paste a video URL, mint an invite link, and your viewers stay in lockstep with you.
Host-authoritative clock
The host is the source of truth for playback state. Guests follow — no split-brain, no "who pressed pause first?".
Sub-100 ms sync
Three-band drift correction: tiny drifts get a silent rate nudge, large drifts get a visible seek. Aim is viewer-imperceptible.
End-to-end encrypted
Sync messages ride the same DataChannel file-sharing uses. DTLS + SCTP at the transport layer — no bytes in the clear on a Rapidly server.
Up to 10 viewers
Each viewer joins via a one-time invite token the host mints on demand. One IP per connection, bounded by the session cap.