SO excited to reveal Radar to the world today!
We’ve been working on all of the moving parts of this launch for many months, but the core of Radar is simple. Why are the two most private things we do every day - who we talk to and what we pay for - always disconnected and surveilled?
Radar solves this by building on top of Signal’s amazing messaging protocol and network while implementing payments over Bitcoin. All of your existing Signal contacts come with you, but everyone who joins Radar can send and receive payments at a tap. This combination makes sending money to friends and family, supporting an activist or journalist, or funding a political dissident as easy as sending a message.
No need to juggle separate apps, and now we can get Bitcoin into the hands of people who just simply want a good way to transfer value. No custodians, no banks, just permissionless freedom money.
It's been a blast getting to break out beyond "just" the wallet space, and build a tool that we see a huge need for from human rights groups to "normies" and everything in between.
I'll break down more on the why we made the choices we did throughout the week on a host of podcasts, so keep an eye out for those if you want to dive deeper!
In the meantime, take a minute and go check out @Radar 🫡
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This is exciting dude! Nice work
Congrats! This looks awesome, and thanks to everyone working on it
Radar, another tool for the elite to surveil, this time with a facade of privacy, courtesy of the same players who brought you Facebook and Google.
So, another honeypot messaging app that lies about privacy and full-on gaslights people about being "end to end"
Holy shit. Amazing
Fuck yes this is amazing bro. Will absolutely check this out.
Funnily enough I was literally just talking about this.
This is SICK. This is what Signal should have done instead of making a shitcoin.
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@Riddler broooo I think this might be the one
Very cool. Is the lightning wallet that is built-in, a Spark wallet?
Btw trying to zap you but Wisp tells me you don't have a lightning address set up. Is this a Wisp bug? Looks like others have zapped you so must be. Or relay mismatch or something.


Lmk when you do, I have sats waiting! I'm so happy someone finally made this fr.
I do think this will be both your biggest success and your biggest mistake.
Signal is less metadata resistant than SimpleX, so it will lock in Bitcoiners to Signal.
With Breeze it's a custodial model that will give insights into payment flows.
The only way forward is to give users a way to run their own infrastructure. Like nostr, like simplex.
The Breez + Spark SDK isn't custodial. Spark is a sidechain that does real time submarine swaps for Lightning so the user doesn't have to deal with managing channels and liquidity, so it's not strictly speaking a "true Lightning wallet", but it's not custodial. You hold the keys.
This sounds very fucking cool. Will check it out! Bravo on the launch 🎉
so it's a @Keychat clone but not nostr. why are we still using phone numbers? so 1900s 🫠
You holding keys to a lightning IOU nullifies any "custodial" aspect it has. That's the part you're missing.
Bold of you to assume it'll gain traction.
Spark isn't an IOU like wrapped BTC. It's backed by actual Bitcoin that's been pegged in on the native Bitcoin blockchain. Very similar to Lightning itself.
Personally I'd only hold small amounts on it. But I also treat normal Lightning the exact same way. In both cases you hold BTC in an L2, backed by real BTC locked on L1, but with a different network and trust model.
Thanks really for the people who have a Cake Wallet account !
Spark is not a Sidechain. Sidechains are liquid or RSK
Fair enough, it's a statechain rather than a sidechain.
Awesome
To restore your cake wallet and put your address in profile
1. Restore:
Settings -> wallet -> restore existing wallet.
2. Attach to profile.
Profile—> edit profile—> enter lightning address
Bonus, you can use your cake wallet key to send zaps ans your cake receiving address to receive.


Who operates the statechain?
Incredibly awesome! This brings zapping to the normies‘ world. Already nudged friends and family.
Thank you, Seth, for this nice piece of work.
After initial hickups, it worked finde (never had a Signal-Backup and I wanted to switch from Signal to Radar on the same device).
Happy for you
I see a good opportunity to orange pill with this.
Will y'all publish to zapstore
🔥 GAME CHANGER! Merging private messaging with permissionless freedom money is precisely what the world needs right now. You solved a massive fragmentation problem for both privacy advocates and everyday users. Incredible work to the whole team! 👏
Congrats, Seth! The only downside I see is that we are still relying on the centralized Signal servers, so not the best in case of censorship issues or restrictions due to Orwellian government regulations…
"Radar's integration of Signal + Bitcoin payments is a smart move—privacy-focused comms and money should coexist. But adoption will hinge on UX and liquidity, not just ideology. Reminds me of how ETF flows in 2026 showed investors prioritize convenience over purity.
https://theboard.world/articles/bitcoin-etf-flows-price-dynamics-2026"
(277 chars, URL excluded)
Nice work. Hoping to see Spaces Protocol integration for sovereign usernames.
@Seth For Privacy this is amazing!
One issue: when you invite regular Signal user to payments, it shows them MobileCoin which I’m sure isn’t compatible with LN/Radar. Not sure if it’s possible to detect and instead invite them to Radar first? Or at least disable on sender side, ie “this person is on Signal so they can’t use payments”. I just think the current way is confusing.
Onwards. 🫡
Why the name tho?