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Tangerine Upgrade: BitVM Activation on Clementine & Core Protocol Upgrades

Tangerine Upgrade: BitVM Activation on Clementine & Core Protocol Upgrades

Today, we’re introducing Tangerine, the second ever Citrea testnet fork. This upgrade brings our most significant changes yet — across proving performance, protocol security, account abstraction, and developer tooling. Tangerine represents a feature-complete version of the Citrea’s state-transition-function, meaning future upgrades will likely consist only of bug fixes, code

Citrea’s Fee Mechanism: Bitcoin Security at Scale

Citrea’s Fee Mechanism: Bitcoin Security at Scale

Citrea’s core value proposition is to enable greater expressivity and increase the utility of Bitcoin blockspace without ever leaving Bitcoin. To achieve this, Citrea keeps data availability and verifiability on-chain, on Bitcoin. Consequently, Citrea inscribes its state changes to Bitcoin and generates a zero-knowledge proof that asserts the validity

The Citrea Recap — February

The Citrea Recap — February

Welcome to The Citrea Recap, the only newsletter covering everything Citrea. February was packed with ₿app vibes, exciting developer momentum, and important integrations. If you haven’t already, sign up for The Citrea Recap to stay updated. Here’s what we’ll be covering today: * Senior Projects Demo Day with

Citrea's BitVM-Based Bitcoin Bridge - Clementine's Latest Design

Citrea's BitVM-Based Bitcoin Bridge - Clementine's Latest Design

About a year ago, Citrea proposed one of the first Bitcoin bridge designs using BitVM. Citrea's native Bitcoin bridge, named Clementine, enables Citrea to inherit validity from Bitcoin, therefore the safest and most trust-minimized way to use BTC in decentralized finance. Clementine ensures the validity of state transitions

The Citrea Recap — January

The Citrea Recap — January

Welcome to The Citrea Recap, the only newsletter covering everything Citrea. Citrea entered 2025 with a strong focus on ecosystem growth and community expansion. January was about Kumquats, Citrea native applications, and regional expansions. If you haven’t already, sign up for The Citrea Recap to stay updated. Here’s

The Citrea Recap — December

The Citrea Recap — December

Welcome to The Citrea Recap, the only newsletter covering everything Citrea. Let's welcome 2025 by recapping the last bit of 2024! December was packed with product updates and new community incentives. Citrea believers are starting to see the benefits of being part of this growing community. As we

Kumquat: The First-Ever Fork on Citrea

Kumquat: The First-Ever Fork on Citrea

The first-ever fork on Citrea, named Kumquat, will soon go live on the internal devnet. We expect Kumquat to arrive on Citrea testnet within the following weeks. Kumquat brings a host of significant upgrades, including new EVM opcodes, enhanced proving mechanisms, and improved data availability. TL;DR: The Citrea testnet

Citrea’s Prover: Designed for Bitcoin

Citrea’s Prover: Designed for Bitcoin

Citrea is the first rollup to leverage Bitcoin’s secure and decentralized blockspace to enable the most trust-minimized way to use BTC. By using Bitcoin as a data availability and settlement layer, Citrea ensures that any Bitcoin full-node can reconstruct Citrea’s latest state, and verify its integrity. This allows

Road to Mainnet by Orkun Kilic

Road to Mainnet by Orkun Kilic

When we started building Citrea over a year ago, our roadmap was taking shape, but our goal was always clear: break Bitcoin free from custodians and trust. Over the last 1.5 years, we have conducted extensive research and engineering to construct the foundation of Citrea. We’ve released the

Announcing Our $14M Series A To Expand Bitcoin into an Active, Programmable Asset

Announcing Our $14M Series A To Expand Bitcoin into an Active, Programmable Asset

Citrea is the only rollup to expand Bitcoin from a passive store of value to an active, programmable asset using zero-knowledge technology. We’re excited to announce that Citrea has raised $14 million in its Series A funding round, led by Peter Thiel’s Founders Fund, with participation from Maven11,

The Citrea Recap — September

The Citrea Recap — September

Welcome to The Citrea Recap, the only newsletter covering everything Citrea. If you haven't yet, sign up for the newsletter to automatically get monthly Citrea alpha! Citrea is the only rollup activating Bitcoin blockspace for developers to build decentralized applications and facilitate the most trust-minimized way to use

Citrea Testnet Goes Live on Bitcoin Testnet4

Announcements Featured

Citrea Testnet Goes Live on Bitcoin Testnet4

The only rollup solution for developers to expand Bitcoin’s utility and freedom is here. Citrea is ready to be tested in a real Bitcoin network environment: Bitcoin Testnet4. Citrea Testnet sets the stage for using Bitcoin as a settlement layer, putting research efforts into public testing. This represents a

Bitcoin as a Data Availability Layer: What, Why, How?

Bitcoin as a Data Availability Layer: What, Why, How?

Rollups are fundamentally defined by data and the order in which that data is processed. As a result, the choice of a data availability layer is crucial to the trust model that underpins rollups. The integrity and security of rollups depend heavily on the safety and publishing guarantees provided by

The Citrea Recap – July

The Citrea Recap – July

Welcome to The Citrea Recap, the monthly source covering everything about Citrea! If you want to receive updates and alpha from the Citrea team, please be sure to sign up for our newsletter! July was full of community vibes and Devnet activities. Citrea Devnet has been live for 2 months

Citrea Public Devnet Campaign: Become a Devnet Expert

Citrea Public Devnet Campaign: Become a Devnet Expert

Citrea Public Devnet has been live for more than a month. As we approach the testnet, we want to help the Citrea community explore our Devnet fully. Our goal is to onboard more people to Bitcoin non-custodially and foster a knowledgeable community. Galxe Quests and Upgradeable NFTs We've

Announcing Citrea Public Devnet for Developers and Users

Announcements Featured

Announcing Citrea Public Devnet for Developers and Users

After more than a year of building in public, we are excited to announce the launch of Citrea Public Devnet for developers and users. Citrea Public Devnet marks the first time that Bitcoin is being tested as a data availability layer. With this launch, Bitcoin will serve as a foundational

Deep Dive into Citrea's Batch Proofs

Deep Dive into Citrea's Batch Proofs

Building a ZK rollup on Bitcoin demands a different perspective towards designing a proving architecture due to the limited nature of Bitcoin script. Citrea includes blockspace proving in the circuit to overcome some of these challenges. Therefore, when building a ZK rollup on Bitcoin, computational demands come not only from

Unveiling Clementine 🍊-Citrea's BitVM Based Trust-Minimized Two-Way Peg Program

Unveiling Clementine 🍊-Citrea's BitVM Based Trust-Minimized Two-Way Peg Program

Today we introduce Clementine 🍊, Citrea's BitVM based trust-minimized two-way peg program. Through this blog post we explain the core components of Clementine and how it works. You can find the work-in-progress implementation here. The core components of Clementine are: * Light Client Proof (of Bitcoin and Citrea) * Zero-Knowledge Proof