What happened
Radar Chat went live on Thursday as a fork of Signal, the encrypted messenger, with a self-custodial Bitcoin Lightning wallet wired into the client itself, according to CryptoBriefing. The wallet is non-custodial, meaning the private keys sit on the user's device rather than with an operator, and payments settle over the Lightning Network rather than on Bitcoin's base chain. The fork preserves Signal's core encryption model.
What it adds is a payments primitive that Signal itself has repeatedly declined to ship in this form. Signal ran a MobileCoin integration years back that never caught on and drew regulatory heat; Radar's bet is that Bitcoin plus Lightning is a cleaner answer. The product is a client, not a protocol.
It talks to the public Lightning Network like any other node.
Why it matters
Lightning has spent years in a chicken-and-egg loop. Wallets exist. Nodes exist.
Merchants exist. What has been missing is a mainstream surface that puts a Lightning payment one tap away from something people already do every day. Chat is that surface.
If Radar's implementation actually works at scale, it's the closest thing crypto has had to a WeChat-style money-in-chat moment on a self-custodial rail. The self-custodial framing matters editorially. Most consumer Bitcoin apps that scaled, from Cash App to Strike, are custodial by default.
A Signal fork that keeps keys on-device is a different animal, and it lands in a regulatory environment where U. S. and EU rulemakers have spent 2024 and 2025 tightening the screws on hosted wallets specifically.