Cake Wallet Founder Launches Radar: Communication Software Integrated with BTC Lightning Network Payments Using Signal Encryption Protocol

Cake Wallet Founder Vikrant Sharma Launches New App "Radar," Set for Simultaneous iOS and Android Release on July 7, 2026, Integrating Encrypted Messaging and Self-Custodial Bitcoin Lightning Network Payments into a Single Interface—Send Bitcoin Directly from the Chat Box Without Switching Apps or Copying Addresses, with a Tested Single-Transaction Limit of $5,000.

(Previous: Musk Launches "XChat" Messaging App: End-to-End Encryption, No Ads, Self-Destructing Messages... Set for April 17 Release on Apple App Store) (Background: Encrypted Communications Could Face EU Ban? Signal Blasts New Regulatory Law for Mass Surveillance of Private Chats, Privacy Eroded)

Table of Contents

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• Tying Lightning Network to a Messaging App
• Uses Signal Protocol but Not a Signal Subsidiary
• Single Transaction Limit of $5,000

Key Takeaways

• Radar App launches on July 7, integrating encrypted messaging and Lightning Network Bitcoin payments into a single interface.
• Users can carry over existing Signal contacts; highest tested single payment is $5,000.
• Founder Vikrant Sharma also helms open-source wallet Cake Wallet, with both operating as independent companies.

You're chatting with friends in a messaging app—gossiping, planning dinner, sharing memes—and when it's time to send money, you usually have to switch to another wallet app, copy a long address, and paste it back. Now, Cake Wallet founder Vikrant Sharma has taken aim at this pain point.

On July 7, 2026, he launched a new app called "Radar," simultaneously available on iOS and Android. The official website tagline is "Chats and sats in one place"—meaning chats and Bitcoin handled together.

Sharma is no newcomer to the crypto space. He founded Cake Wallet, a well-known open-source wallet with a loyal user base. With Radar, he deliberately runs the two companies separately, ensuring Radar is not a sub-feature of Cake Wallet but an independent entity.

"The people we chat with and the people we pay are often the same group, yet messaging and payments are still in different places," Sharma said, highlighting the gap Radar aims to bridge.

Tying Lightning Network to a Messaging App

Radar's core design integrates end-to-end encrypted messaging with self-custodial Bitcoin Lightning Network (a Bitcoin Layer 2 payment layer enabling faster and cheaper microtransactions) into a single interface. Users can directly hit send in the chat box, and Bitcoin moves without leaving the app or copying wallet addresses. The underlying technology uses the Breez SDK, a non-custodial Lightning Network infrastructure—private keys remain with the user, no third-party fund custody, and no KYC verification required.

Uses Signal Protocol but Not a Signal Subsidiary

For encrypted messaging, Radar uses the Signal Protocol, the same open-source encryption protocol behind Signal itself. However, Radar is an independently developed and operated company, not affiliated with Signal.

According to Decrypt, Radar even provides financial backing to Signal, treating it as a public good. More conveniently, users can bring their existing Signal contact list directly into Radar without re-adding friends.

Single Transaction Limit of $5,000

When setting up Radar, the system provides a seed phrase (a backup recovery phrase for the wallet) for the user to safeguard, plus an encrypted backup linked to the Signal account as a secondary recovery option. The highest tested single payment is $5,000. This limit is determined by the Lightning Network's liquidity, not an artificial constraint imposed by Radar.

In other words, the app doesn't stop you—what stops you is how much the entire Lightning Network can handle at that moment.

"Convenience comes at the cost of control," Sharma said, pointing out the trade-off in mainstream payment apps like Venmo, Zelle, and Cash App: convenience demands identity verification and data stored on centralized servers. Radar aims to prove that self-custody can still enable frictionless payments.

The trend of "chat apps doing payments" is not limited to Radar. In April, Musk launched the encrypted chat app "XChat" on the Apple App Store, and Jack Dorsey's Cash App is also pushing social payment features to compete for Gen Z's wallets. Messaging apps are becoming a new payment battleground, and Radar is injecting Bitcoin directly into the fray.

FAQs

What is Radar?

Radar is a new app launched by Cake Wallet founder Vikrant Sharma, releasing on iOS and Android on July 7, integrating encrypted messaging and Lightning Network Bitcoin payments into a single chat interface.

What is Radar's relationship with Signal?

Radar uses Signal's open-source encryption protocol for end-to-end encryption but is an independent company, also financially supporting Signal's operations. Existing Signal contacts can be directly imported into Radar.