San Francisco Ruby Conference, Nov 19-21, 2025

April's SF Ruby Meetup is now live on YouTube! This time, we met at @intercom and listened to: - Brian Scanlan (@brian_scanlan) on turning Claude into a full-stack engineering platform - Konstantin Gredeskoul (@kig) on adaptive user flows with Ruby DSLs and LLMs - Chris Davis (@tweetellington) on semi-autonomous software: putting the human in the loop with Rubot Hosted by @inazarova, we meet every month to learn from each other and listen to presentations about all things Ruby (e.g., libraries, frameworks, open source tools, new startups). Watch the recording: youtu.be/xep8UoK5cyA?si…

SF-based devtool founders, this one's for you! There's still room to join us on May 5 for breakfast and a conversation about agent experience at Blue Bottle Coffee. Sign-up info in the thread:

Marco (@marcoroth_) is a great example of someone who is an active part of the Rails community. He built Herb by listening to developers' frustrations and made it open source to give back. Herb is an HTML-aware ERB toolchain and an ecosystem of developer tools for HTML + ERB files. We interviewed Marco back in November 2025 at @sfrubyconf when Herb was still in development. In this conversation, he explains what it is, how Ruby simplifies AI coding, and why attending conferences and events matters.

You can now look like a Martian! We made our merch store public and it has amazing designs by Anton Lovchikov. Grab what you like. We ship internationally. Link below.

We want you to meet Andy (@andywang), the founder of Finta. Last year, we invited him to demo his product at @sfrubyconf. He has a background in CS and finance. After working as a finance director at different companies, he built a tax and accounting solution for devtool founders that actually makes taxes "forgettable." @Finta is becoming the new default for startups to handle accounting and taxes. Within 10 minutes, founders get automated bookkeeping, effortless tax filing, and real-time insights. 🧵

Meet Kody (@kodykendall), an SF-based software engineer and founder. He's big on bootstrapping, open source, and making AI practical for indie builders and teams. At @SFRubyConf, we made a point of giving the stage to founders who are actually building things and connecting them to active members of the Ruby community. Kody was one of them. He demoed LlamaPress AI, a fullstack coding agent called Leonardo that helps ops teams build custom Rails apps in the browser. We got to see Leonardo work through and solve errors in real time. Link to the demo below.

Friends, the next SF Ruby meetup is tomorrow (!!) at Cisco Meraki in Mission Bay. Join us to talk about building developer tools with Ruby, about Falcon+AI and more. Demo your Ruby startup: still one slot left (DM me). 5 pm March 24, sign up at luma.com/sfruby

No one could actually explain what PMF is or how to find it... until @inazarova conducted thesis-grade research on 30+ successful devtool companies. She built a PMF compass that tells you exactly what to do next based on where you are. If you have an early-stage devtool, AI, or cybersecurity startup: go to evilmartians.com, answer a few questions, and get your plan of action.

If you're a Rails engineer, you've probably seen or heard of @inazarova—but have you ever wondered about her background? Watch her interview with @michael_rispoli and learn how she went from engineer to investment banker to our CEO, how we monetize open source projects like AnyCable, and more: evilmartians.com/events/strictl…

What should I present at the upcoming @sfrubyconf on Mar 24? The backdrop for the talk is building @OpenGraphPlus with Rails, but I need to pick a focus.

Herb v0.9 is here! 🌿 This release focused on stability, compatibility, and deepening Herb's understanding of HTML+ERB templates. Featuring Action View helper support, Prism AST nodes, new linter rules, a faster linter CLI, new language server features, and engine bug fixes. 🚀

Most founders spend years chasing PMF with no compass. We're changing that on March 23rd. 👀 Save the date.

We're finally all caught up and February's SF Ruby Meetup is now live on YouTube! We met at @sentry's offices and listened to: - Neil Manvar (@ndmanvar) introduce Sentry Seer - Sohil Kshirsagar (@sohilkshirsagar) on why coding agent need a harness, not just guardrails - Mike Dalton (@kcdragon_) who came all the way from Philly to talk about Calendar Vision and explain how to turn images into calendar events - Our Vladimir Dementyev (@palkan_tula) who also visited SF for a day and joined us to address whether or not architecture still matters if an AI agent is writing the code. (Slides in the video description). - Brandon Weaver (@keystonelemur) who hosted a Q&A about Ruby Central We meet every month to learn from each other, connect with new people, and eat pizza. Watch Feb's recording: youtube.com/watch?v=izKer1…

The talk @pragdave gave at @sfrubyconf about not using classes has been living rent-free in my head since November. I finally got a chance to play with modules for configuration in @OpenGraphPlus and worked out modules can be extended with modules. beautifulruby.com/code/framework…

December’s SF Ruby meetup, hosted at @intercom’s offices, is now live on our YouTube! Find presentations by: - @noelrap on what’s new in Ruby 4.0 - @inazarova on bundlebun (by @yaroslav), a JS runtime for Rails - @TonsOfFun111 on building AI features into Basecamp OSS Thanks to Hiten Parmar for welcoming us and kicking off the session! Watch it here: youtube.com/watch?v=V3b9hf…

Note that regrettably, we had a technical difficulty with @obie 's keynote recording (it was corrupted), so we linked his amazing blog post instead.

PSA: ALL VIDEOS from the SF Ruby conference are live, including workshops (Inertia Rails, ActiveAgent and more), keynotes, talks, Ruby startup demos. sfruby.com/talks/

@blueridgeruby That's why we've built our own and open-sourced it: evilmartians.com/chronicles/red… Give it a try for the next year)

Watch them here: sfruby.com/talks/

Huge shoutout to all speakers and demo presenters of the first #SFRuby Conference: 53 recordings are now live! Inside are all Ruby stars: @marcoroth_ @paolino @palkan_tula @ChaelCodes @sam_poder @adrianthedev @bensheldon @jeremyevans0 @iamalbertpai @samlambert and more. Enjoy!