Share this article

Signal Messaging App Launches MobileCoin Payments Feature in Beta

Yes, but: The feature will only be available to users in the U.K., and only on iOS and Android.

Updated Sep 14, 2021, 12:36 p.m. Published Apr 6, 2021, 5:47 p.m.
jwp-player-placeholder

Signal, the private messaging app that had a 4,200% increase in downloads in January, is launching a payments feature using . Signal founder Moxie Marlinspike has been an adviser to the project since 2018.

STORY CONTINUES BELOW
Don't miss another story.Subscribe to the The Protocol Newsletter today. See all newsletters

The goal of MOB, which is based on Stellar blockchain technology, is to be able to work efficiently on mobile devices while also protecting users' privacy. The launch on Signal has long been rumored, dating back to when Facebook announced plans to launch its libra stablecoin in early 2019.

MOB stands out from a pack of messenger-native crypto coins because it has actually launched. Telegram’s TON was nuked by U.S. regulators; Facebook’s libra (now diem) remains in a state of near-completion.

At this time, the MOB payment feature will only be available to users in the U.K., and only on iOS and Android. Desktop support is not included.

"I'm terrified for Signal," Matthew Green, a cryptographer at Johns Hopkins University who sits on the Zcash Foundation board, told Wired, adding:

"Signal as an encrypted messaging product is really valuable. Speaking solely as a person who is really into encrypted messaging, it terrifies me that they're going to take this really clean story of an encrypted messenger and mix it up with the nightmare of laws and regulations and vulnerability that is cryptocurrency."

On the other hand, integrating privacy-oriented cryptocurrencies into relatively popular communications apps may give users an attractive onramp and interface to enter into the world of crypto.

Read more: Cryptocurrency Advised by Signal Founder Goes Live, Begins Trading on FTX

In a blog post announcing the launch of the feature in beta, the company said users can link a MOB wallet to Signal, send funds, receive funds, keep track of their balances and review transaction histories.

“As always, our goal is to keep your data in your hands rather than ours; mobile coin’s design means Signal does not have access to your balance, full transaction history, or funds,” Signal wrote. “You can also transfer your funds at any time if you want to switch to another app or service.”

Mobilecoin is currently only trading on FTX.

More For You

Protocol Research: GoPlus Security

GP Basic Image

What to know:

  • As of October 2025, GoPlus has generated $4.7M in total revenue across its product lines. The GoPlus App is the primary revenue driver, contributing $2.5M (approx. 53%), followed by the SafeToken Protocol at $1.7M.
  • GoPlus Intelligence's Token Security API averaged 717 million monthly calls year-to-date in 2025 , with a peak of nearly 1 billion calls in February 2025. Total blockchain-level requests, including transaction simulations, averaged an additional 350 million per month.
  • Since its January 2025 launch , the $GPS token has registered over $5B in total spot volume and $10B in derivatives volume in 2025. Monthly spot volume peaked in March 2025 at over $1.1B , while derivatives volume peaked the same month at over $4B.

More For You

Coinbase Expands Reach of Stablecoin-Based AI Agent Payments Tool

Coinbase (appshunter.io/Unsplash/Modified by CoinDesk)

The updated protocol, x402 V2, allows developers to combine payments, enable secure wallet access, and add new features via a clean, modular design.

What to know:

  • Coinbase has released the latest version of its stablecoin-based payments protocol for AI agents, making it easier to extend and plug in the autonomous payments system.
  • The new version adds wallet-based identity, automatic API discovery, dynamic payment recipients, and support for more chains and fiat.