Ecosystem Updates September 2026 | New Website, a Maturing SDK, and Knoss

September packed in a lot and closed Q3 in style. We refreshed the look and feel of our website, shared the strategy that’s been taking shape over the past few months, and brought Knoss, a derivatives exchange built on Cartesi, into the spotlight.

On the tech side, the Fraud-Proof System got more robust, and builders got fresh updates across the Rollups stack and developer tooling. On the community side, we kept seeing support and appreciation that we never take for granted, and we're excited for what's to come as we embark on the Q4 journey with all of you.

Here’s your full roundup of what happened across the Cartesi ecosystem this past month.

Tech

This past month, Cartesi's Fraud-Proof System advanced with settlement and bond recovery improvements.

The Fraud-Proof System continued its v3 alpha development with Permissionless Refereed Tournament (PRT) 3.0.0-alpha.4, introducing a safer two-step settlement process and a new sentry mechanism that can shorten finality when independent validators agree on the result.

The release also introduced the persistent Sling node and aligned the stack with Cartesi Machine v0.21 and Rollups Contracts 3.0.0-alpha.10.

Later in the month, the next PRT release, 3.0.0-alpha.5, improved the reliability of Sling around epoch settlement and bond recovery.

The node now makes sure an epoch is fully settled and its bonds are recovered before moving on, while restarted nodes can resume where they left off. This helps prevent refunds from getting stuck and makes validator operation more robust. Read more in the thread unpacking this release:

In parallel, Rollups Contracts expanded its published artifacts and developer tooling.

Rollups Contracts 3.0.0-alpha.10 expands its published compilation artifacts with OpenZeppelin's standard ERC interfaces, including ERC-165, ERC-20, ERC-721, and ERC-1155. These artifacts are used by downstream tooling such as the Rollups Node CLI when interacting with asset portals, improving compatibility across the broader Rollups stack.

Alongside the contracts release, new versions of the @cartesi/client, @cartesi/react, @cartesi/codec, and @cartesi/wagmi-plugin packages align the TypeScript tooling with 3.0.0-alpha.10 and its latest deployment artifacts.

The update refreshes contract addresses across supported networks and adds support for generating the contracts and deployment information needed for Permissionless Refereed Tournament integrations.

Convenience saw some shipping too, and now everyone can run the Cartesi Machine in the browser with a new TypeScript package.

The new @cartesi/machine package brings the Cartesi Machine API to web applications through WebAssembly, allowing developers to instantiate, configure, run, and inspect deterministic RISC-V machines directly in the browser.

Web Worker support keeps execution responsive, while new console interfaces enable interactive Linux terminals and browser-based experimentation without requiring a local Cartesi Machine installation. Try it here and check out this thread from co-founder Erick de Moura on why this matters:

The Cartesi Sequencer is another stream worth mentioning. It's progressing through its early alpha phase with v0.1.0-alpha.9. Documentation and examples are available to help builders get started, alongside canonical machine images for devnet and Sepolia and wallet-sequencer binaries for Linux on amd64 and arm64, making it easier for anyone to run and validate the Sequencer across environments.

For a bird's-eye view, current architecture priorities are tracked and periodically updated on our Technical Plan website page, so that’s your go-to source to know where the technical teams are spending their time and effort nowadays.

Ecosystem

On the ecosystem side, September ended on a high note with the launch of our new website and a strategy explainer introducing Knoss, a derivatives exchange being built on Cartesi Rollups.

The Cartesi Foundation is now focusing more of its engineering and business development efforts on supporting Knoss. Over the years, the lessons learned have crystallized into the understanding that technical advantage alone doesn't drive adoption, so the next stage for Cartesi is putting the tech to work in a real commercial product, where its requirements can shape the infrastructure directly.

Behind Knoss are Felipe Argento, Danilo Tuler, Pedro Argento, Eduardo Barthel, and Brandon Isaacson, familiar faces from the Cartesi ecosystem who decided to build on the stack themselves and have taken on this mission as an independent venture. The Foundation funded Knoss's early development through a grant and holds a contractual right to 25% of its net revenues after essential operating and growth costs. Any of that revenue will go back into developing Cartesi.

Cartesi remains open source and general purpose, and our technical work now centers on completing and hardening the Rollups and fraud-proof stack.

To read more about this new direction and what it means for Cartesi and Knoss, check out this blog post, and while you're at it, give Knoss a follow on X so you don't miss a thing.

Our contributors welcomed the news, and we've seen real enthusiasm across the ecosystem for how well the Cartesi stack fits running options onchain:

For some, this moment has been a long time coming. The idea that decentralized derivatives and the Cartesi stack belong together goes back years, and it's been great to see that vision finally becoming real:

Community

On the community front, September brought us some new NFC keychains we discovered in the big garden of the internet, or, more precisely, Instagram. Kudos to the creator.

On the creative side, our Giphy account recently passed 1M views. These are the animated GIFs that decorate many of our posts on X, and what began as a playful way to give our feed some personality has found a much wider audience. Seeing people watch them a million times over tells us the Cartesi brand is landing, and we're grateful for it.

On this one, a shoutout goes to our marketing contributor Nida Baris, who's been cooking up dozens of these in the background. Don't be shy, and feel free to use them in any related posts.

And while we're on the shoutout theme, one goes out to our developer advocate Shaheen Ahmed, the most AI-pilled contributor we know. He's always experimenting and sharing his findings on X for anyone who wants the latest tea on AI developments. Give him a follow.

Shoutouts to our tech contributors go without saying, so we'll stop here, but not before a well-deserved one to none other than Erick de Moura, co-founder of Cartesi, for his invaluable contribution to the new website, now live in its current shape. There were many chefs in the kitchen, but one lead chef, and we'd like to extend him a formal thank you. We hope our community likes the new site as much as we do. And as Erick put it, seeing the people who helped build Cartesi take the reins of a business of their own is a new direction that has everyone excited.

Media

On the media front, Felipe Argento put the thesis into words with "ETH to a Million or Zero." The piece explains why perps alone can't express real market convictions, why options have stayed out of reach onchain, and how verifiable compute removes the tradeoff between capital efficiency and trust. It's a great read for anyone wondering why the Cartesi stack and options fit so well together, and why Knoss is being built to prove DeFi no longer has to choose between overcollateralized simplicity and trusted offchain risk engines.

Over on our social media channels, the TikTok journey continued this month as well, with the channel growing steadily and new content going up regularly. If you haven't already, hit follow and ask your TikToker frens to do the same, so we can reach even more people curious about Cartesi. Not on TikTok? The Cartesi YouTube channel has you covered then, with similar video content and shorts dropping there all the time.

Our CoinMarketCap community keeps growing, and this month it passed 90,400 followers. A total of 500 new followers joined us this quarter, and we love to see it. CoinMarketCap also kept publishing AI-powered articles about Cartesi and our latest updates. Follow our profile to join the community and learn more about what it means to build with Linux onchain, backed by Ethereum's security.

Finally, as you probably know by now, these ecosystem updates also go out in the Cartesians' monthly newsletter, and once again there's a merch pack up for grabs. The challenge: whoever follows us and sends us a DM on TikTok gets their hands on it. If you haven't already, subscribe to the newsletter and keep an eye out.

That’s a Wrap

This was September, a month that set the tone for the rest of the year. We're rolling into October and Q4 with a new website live, Knoss taking shape on Cartesi Rollups, and clear priorities on the technical side: completing and hardening the Rollups and fraud-proof stack. There's plenty of work ahead, and we're excited to keep expanding what's possible on this compute layer for production-ready DeFi products.

More is on the way, so stay tuned. Until then, join the conversation on Discord, X, Telegram, and beyond.

Cartesi Ecosystem Updates - September 2026

Tech

Ecosystem

Community

Media

That’s a Wrap

More must-see content pieces

More from Monthly Updates.

Cartesi Ecosystem Updates - August 2026

Cartesi Ecosystem Updates - July 2026

Cartesi Ecosystem Updates - June 2026