Skip to content
Spackflow
简体中文 Download

Messaging · Real-time calls

Conversation, in flow.

Messages arrive before you finish thinking about them. Calls clear enough to make distance irrelevant. One account, every device.

Get Spackflow See what it does

Messaging

Arrival is instantaneous.

A persistent connection means messages never queue. The moment you send, it is already on their device — no spinner, no waiting, no "sending".

  • Millisecond delivery

    Persistent connections and incremental sync keep the path from you to them as short as it can be.

  • Synced everywhere

    Read it on your phone, and it is read on your desktop. Conversations, drafts and unread counts stay identical.

  • Media, uncompromised

    Photos, video, files and voice travel at original quality. No second round of compression.

20:43
Alex Online
Today
Finished the draft. Can we go through it tonight? 8:41 PM
Sure. Nine? 8:41 PM
Perfect, I'll start a call 8:42 PM
Proposal-final.pdf 2.4 MB 8:42 PM
Got it — much clearer now 8:43 PM
Message…

Real-time calls

Face to face, minus the glass.

Adaptive bitrate starts yielding the instant your network dips, and you never notice it happened. What remains is their face and their voice.

Good connection 12:04
Alex Speaking
You
  • 1080p Video quality
  • 48kHz Audio sampling
  • < 200ms End-to-end latency

  • Adapts to weak networks

    When bandwidth fluctuates, voice continuity comes first and video degrades smoothly instead of freezing.

  • Low latency

    A LiveKit-based media path brings one-to-one calls close to the rhythm of speaking in the same room.

  • Switch mid-call

    Turn on the camera partway through a voice call. One tap, no interruption.

Security

Your conversations are yours.

Everything is encrypted in transit, and the server can run entirely inside your own infrastructure. Where your data lives and how long it stays is your decision, not ours.

  • TLS encryption across the entire transport path
  • Full self-hosted deployment supported
  • Two-factor authentication and device management
  • Your messages are never mined for advertising

Every platform

Four clients, one experience.

One account moves seamlessly between phone, tablet and desktop. Which device you said it on stops mattering.

  • Android Android 7.0 or later
  • iOS iOS 13.0 or later
  • macOS macOS 11 or later
  • Windows Windows 10 or later

Start now.

Pick your device. You will be sending your first message within a minute.

See all platforms