READY. SET. GO! 🚀 Core Lightning v25.09rc1 is tagged and ready for testing before the final release! ⚡️ We’re inviting the open-source community to try it out and share feedback with the project. Testing and collaboration are what power open-source projects like CLN. 🔗👇 If you run a Lightning node, now’s the time to dive in. Exploring the new features and sharing feedback makes CLN stronger.

GitHub

Release v25.09rc1 Hot Wallet Guardian · ElementsProject/lightning

Release Candidate for Core Lightning v25.09 This release has been named by @king-11. Note: release schedule moved one month: this is v25.09, and al...

In this clip, @npub15r8c...mk4g clears up a common mistake: Your hardware wallet isn’t where your Bitcoin lives, it’s just how you use it. Your seed words are the Bitcoin. That’s why serious Bitcoiners back them up on metal, not paper. Protect your seed with Blockstream Metal. Fireproof, waterproof, offline backup. https://store.blockstream.com/products/blockstream-metal-offline-backup

Following the launch of Simplicity on the @npub1nyyh...7gan mainnet, Blockstream Research Director Andrew Poelstra and Blockstream CEO @npub1qg8j...24kw joined @StarkWare to discuss its capabilities and the STARK verifier built directly in the language. Details 👇

Blockstream

Blockstream’s Adam Back and Andrew Poelstra Discuss Simplicity on Liquid with StarkWare

On August 1st, Simplicity activated on the Liquid Network, unlocking smart contracts that are formally specified and built from first principles. T...

Bitcoin payments have levelled up. @npub1qg8j...24kw explains how trustless layer-2 swaps between the @npub1nyyh...7gan and Lightning enable payments that are fast, private, and even possible offline. Try it on @AQUA Wallet, @BULL BITCOIN, @peachbitcoin, and Misty Breez by @Breez ⚡️.

Wherever you are, Bitcoin’s in the lead. Download the open-source, non-custodial Blockstream app and track every new all-time high in real time.

Stay vigilant 🚨 With Bitcoin near all-time highs we’re seeing more impersonations of Blockstream using fake posts, websites, and emails. Don’t trust, verify. If you spot suspicious content claiming to be us, submit a support ticket via the link in our bio. 🚨 Reminder! 🚨 Never give your seed phrase to anyone and never enter it on a website or software given to you via DM or email. If you need assistance with an issue or bug, open a ticket. ⬇️ http://help.blockstream.com

To celebrate Bitcoin Pizza Day, we donated 1,000 Blockstream Jade hardware wallets to the @My First Bitcoin Node Network to support hands-on Bitcoin education around the world. Here are 7 more communities putting them to use 🧵 ⬇️ The Bitcoin Ubuntu team are set to educate with Jades at their upcoming self-custody workshop. 🇿🇦 A grassroots push in Zambia is being powered by Bitcoin Vic Falls using their donation to expand Bitcoin education. 🇿🇲 A fresh delivery of Blockstream Jade wallets has reached @BitcoinEkasi in South Africa through the My First Bitcoin Node Network. 🇿🇦 A special unboxing saw Free Madeira receive new Jades to strengthen digital sovereignty on the island. 🌊 Students and Bitcoin project leaders across Kenya will soon receive Jades from Mutonga Nakamoto, Founder of BTC Nairobi, to advance education and self-custody. 🇰🇪 In Nigeria, DigiOats is equipping Bitcoin diplomats with Jade hardware wallets to promote open-source Bitcoin education. 🇳🇬 The Bitcoin Matatu team led by Master Guantai in Nairobi is preparing to give away Jade wallets at upcoming community events. 🇰🇪 Watch the recap from @PUBKEY NYC to see the moment this donation was announced.

Get your friends on Bitcoin in seconds with the Blockstream app using just Face ID or a PIN. Once they’re stacking, they can back up their 12-word recovery phrase anytime or pair a Jade.

Our first big update to the new Blockstream app is out now and ready to download. We’ve finessed the entire user experience to make it even easier to buy, secure, and manage your Bitcoin and @npub1nyyh...7gan assets in one place. Still 100% open-source and Bitcoin-only. 🧵 ⬇️ New asset views are now just one tap from the home screen. Check balances, transaction history, or initiate sends without extra steps. Pull down on the home screen to trigger account discovery instantly. @npub1nyyh...7gan functionality gets important upgrades. 2FA can now be reactivated on older 2-of-2 wallets. BIP21 payment URIs are clickable links that pre-fill both the recipient address and amount in your wallet. They’re now better validated in the Blockstream App to protect your funds when sending. The wallet list has been refined for faster navigation, especially with multiple accounts. Watch-only wallets now include a dedicated security tab for quickly verifying backup status and hardware setup. If you're still using multiple apps to buy and self-custody on mobile now’s the time to switch. Download the Blockstream app and take control of your Bitcoin and Liquid in one place.

Blockstream: Bitcoin and digital asset infrastructure

Blockstream App: A multi-platform, feature-rich Bitcoin and Liquid Wallet.

Blockstream app guides you from your first bitcoin purchase to full self-custody, all inside one elegant, security-first Bitcoin experience.

Blockstream’s Andrew Poelstra joins @TFTC to break down why Simplicity changes the game for Bitcoin smart contracts. Now live on the @npub1nyyh...7gan, it enables covenants, DLCs, delegation, and programmable Bitcoin while avoiding the complexity and risk that define other platforms.

Blockstream CEO @npub1qg8j...24kw breaks down the premium features of the Jade Plus Bitcoin hardware wallet, including the metal case, bigger screen, faster CPU, and @npub1nyyh...7gan support. Fully open source hardware and software. Bitcoin only.

Q2 was epic at Blockstream! 🚀 1️⃣ Simplicity activated on the @npub1nyyh...7gan 2️⃣ Core Lightning shipped new features and developer tools 3️⃣ The all-new Blockstream app went live @The Bitcoin Conference 4️⃣ Thousands of Blockstream Jade hardware wallets were donated to educators around the globe Dive into the full Q2 rundown for an inside look at company progress, business growth, industry moves, and the latest from our engineering teams.

Blockstream

Blockstream Quarterly Update - Q2 2025

In this latest update, we cover key technical progress, product launches, research breakthroughs, media wins and commercial successes throughout th...

With $14B in ETF flows and treasury companies accelerating, Bitwise Invest CIO Matt Hougan says $200K Bitcoin is still in play this year. Tune in to Bitcoin Capital #19 for his take on what’s coming next. 🗓 August 5 at 15:00 UTC https://x.com/i/broadcasts/1dRJZYELrooGB

In 2017, Blockstream set out to develop a smart contract language that outperforms Bitcoin Script and EVM, offering more expressiveness with stronger safety assurances. Eight years later, we believe we've done it. Introducing Simplicity.

Blockstream

Simplicity Launches on Liquid Mainnet

Back in 2017, Russell O'Connor at Blockstream published the Simplicity whitepaper. The goal was ambitious: design a clean-slate vision for a smart ...

--- Simplicity isn't like Solidity, or most modern programming languages, which are Turing-complete. Instead, the language was designed to express any finite function while avoiding the risks associated with unbounded loops and global state.

Simplicity

Simplicity: Next-Generation Smart Contracts for Bitcoin

Build secure, transparent Bitcoin smart contracts with Simplicity. Learn, write, and deploy powerful contracts using Simplicity and SimplicityHL.

--- Simplicity provides developers with high confidence in their applications, allowing them to know all potential outcomes and fee costs before execution. The recent Bybit hack illustrates the risks of including features like recursion and global state.

Blockstream

The Risks of Expressive Smart Contracts: Lessons from the Latest Ethereum Hack

The fresh Bybit exploit in an Ethereum smart contract has revived long-standing debates about the security trade-offs built into the Ethereum proto...

--- With Simplicity's arrival, we have for the first time a clean foundation for serious financial applications, without the complexity and patchwork of risks that defined the last era of DeFi. --- Want to build covenants, vaults and delegation schemes? Now you can on the @npub1nyyh...7gan. Want to create derivatives, pooled wallets or tokenless DEXs? That's possible too.

The Liquid Network

The Liquid Network: The Financial Layer for Bitcoin Capital Markets

Liquid is an open-source Bitcoin layer-2 that enables fast, confidential bitcoin payments and secure asset issuance.

--- Simplicity on Liquid is just the beginning. With community feedback, real-world usage, and more tooling, docs, wallet support, and example contracts, our next major goal is to activate on a Bitcoin test network. Get started today.

Simplicity

Simplicity: Next-Generation Smart Contracts for Bitcoin

Build secure, transparent Bitcoin smart contracts with Simplicity. Learn, write, and deploy powerful contracts using Simplicity and SimplicityHL.

Our Bitcoin Pizza Day donation keeps making its way around the world 🌍 We're excited to support Bitcoin Africa Story, part of the @My First Bitcoin node network, as they teach self-custody with the secure, Bitcoin-only, open-source Jade hardware wallet.

With the Jade Plus, it’s simple to scan and sign air-gapped Bitcoin and @npub1nyyh...7gan transactions, bringing the highest level of Bitcoin security to everyone. Getting started with air-gapped Bitcoin security is easy with Jade Plus. Visit the Blockstream Store today. ⬇️ https://store.blockstream.com/products/jade-plus

Bitcoin meetups have always been the engine of adoption. Now with the new Blockstream Local, meetup organizers can access free workshop materials, receive on-chain Bitcoin to distribute at events, and onboard their community to self-custody with the Blockstream app and Blockstream Jade. Read the full story on how Blockstream Local, now powered by the Blockstream app, plans to fuel grassroots Bitcoin adoption with real sats and free open-source self-custody tools. From El Salvador to Cuba, Namibia to Indonesia, learn how to get involved.

Blockstream

Blockstream Local: Now Powered by the Blockstream App

Grass-roots Bitcoin meetups have always been an engine of adoption. They turn abstract ideas into practical skills: someone installs a wallet, lear...

To celebrate Bitcoin Pizza Day, we teamed up with @PUBKEY to announce a donation of 1,000 Jade wallets to the @My First Bitcoin node network, supporting hands-on open-source Bitcoin education worldwide. Meet the communities receiving them 🧵⬇️ In the Dominican Republic, BTC Dominicana is using their new Jades to empower the local Bitcoin community with tools for self-custody, education, and growth. 🇩🇴 In Mexico, @thecore21m is putting Jades to work in monthly meetups demonstrating real Bitcoin self-custody in action. 🇲🇽 In Nigeria, Bitcoin Anambra is strengthening its grassroots mission by delivering Bitcoin education and self-custody tools to the people. 🇳🇬 Returning from El Salvador and Guatemala, Kirscha Kievits is set to equip students with Jades for hands-on Bitcoin learning. Watch the recap from @PubKey NYC and see the moment the donation was announced.

Feeling late to Bitcoin? @The Bitcoin Conference in Las Vegas our CIO Sean Bill explains why pensions still see huge upside ahead with Bitcoin’s 79% compound growth and a Sortino ratio that blows away stocks.

Watch as Cryptography Lead at Blockstream Research Jonas Nick joins Brink to break down DahLIAS, aggregate signatures, secp256k1 compatibility, CISA, and more.