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  • MessagingSealed before send.
  • Voice & videoClose. Clear. Private.
  • StatusShine then fade.
  • ChannelsBroadcast. Follow. Quiet.
  • PrivacyYou decide everything.
  • GroupsCrews without chaos.
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Privacy & security

Messaging we're proud to own.

UIMessage exists for one reason: private conversations should feel effortless and stay yours. So we built the whole thing ourselves — and we sweat every detail.

Built in-house, on purpose.

When you control the whole system, you control the trade-offs — and we choose privacy and quality every time.

Owned, not rented

The Go message router, media pipeline, signaling, SFU, and TURN relay are built in-house, so we control their security and performance trade-offs.

Documented trust boundary

The iPhone client encrypts personal content before relay. The server identity directory remains trusted, and Signal-style verification and ratcheting are not implemented yet.

Calm, native, fast

Thoughtful, native apps that respect your time — no clutter, no dark patterns, no ads.

Free for everyone

We build a messenger we're proud of, not a product that monetizes your attention.

The company

An IntrSI product

UIMessage is built by IntrSI — an independent studio that builds the tools we wish existed. We answer to the people who use our products, not to advertisers.

Learn more at intrsi.com.

Straight from the newsroom.

Product news, security deep-dives, and stories from the team building UIMessage.

All news
Product

Introducing UIMessage — private messaging, done right

May 20, 2026·4 min read
Security

How UIMessage's current iPhone encryption works

May 17, 2026·6 min read
Product

Your privacy, your rules: photo, last seen, and online controls

May 11, 2026·3 min read
Engineering

Calls that feel like the same room

May 5, 2026·5 min read
UIMessage

Your words leave the phone already sealed. The rest is just getting them home.

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