Rails Is Sugar for LLMs
SF Ruby news: March 2026
The San Francisco tech conversation in March was about model benchmarks, agent frameworks, and whether TypeScript is done. Meanwhile, Rails had its biggest month in years.
Garry Tan, YC’s CEO, ships 10,000 lines of code a week on a Rails app written with Claude Code. That is his weekly average. In March he open-sourced the setup and the line:
“Rails was designed for syntactic sugar, and LLMs are sugar friends.”
Then the receipts started rolling in.
The money moved
Intercom raised $250M on top of a 2M-line Rails monolith, with its Fin AI agent on a $100M ARR run rate inside $400M+ total. They’re hiring 650 people — presumably to keep up with Fin.
If you want to see what this looks like from the inside, Intercom’s Brian Scanlan is speaking at SF Ruby’s April meetup tomorrow at Intercom SF on how 90% of Intercom’s pull requests are now authored by Claude Code. He’ll walk through their internal Claude Code plugin system — 13 plugins, 100+ skills — and why the top power users at the company are design managers, not engineers. Free, 5:30 PM, at Intercom’s office. Also on the bill: Konstantin Gredeskoul on adaptive user flows with Ruby DSLs and LLMs, and Chris Davis on semi-autonomous software with human-in-the-loop.
GitLab crossed $1B ARR, authorized a $400M buyback, and added more $1M+ customers in a single quarter than any before. Chime is guiding to $2.6B+ revenue and GAAP profitability in 2026 — 9.5M members, +31% YoY, on Rails and a cleaner balance sheet than most of fintech. Shopify’s Winter ‘26 Edition shipped 150+ updates, including Agentic Storefronts that put products inside ChatGPT and Perplexity; revenue is $3.67B a quarter, GMV hit $124B, and yes, still Rails.
Spring Health acquired Alma to form a $6–7B mental health company projected at $1B in year-one revenue. The Rails backend matches 50M+ lives to therapy. The biggest mental health consolidation of the year, running on Rails.
The tooling caught up
Claude Code merged Ruby LSP into its official plugins — go-to-definition, hover, diagnostics, 900x faster than text search. Herb v0.9 gave ERB a C-based parser that understands Action View helpers, which means AI coding agents work against an AST instead of squinting at strings.
The hidden winners
Omada Health posted its first profitable quarter — Q4 revenue $75.8M (+58%), membership 886K (+55%), stock +14%. Checkr launched AI identity verification to fight deepfake hiring fraud and embedded it in QuickBooks for 120K+ businesses, because the robots are applying for jobs now too.
Apollo.io shipped the first agentic GTM platform — 20K weekly users, 2.3x more meetings booked, $1.6B valuation, 210M+ contacts on one Rails monolith. Chatwoot added another 490 stars on its way to 27.7K — ten people, $870K revenue, open-source alternative to Intercom. Lago Embedded launched white-label Rails billing with PayPal as an early adopter!
The companies shipping the most interesting products, raising the biggest rounds, and printing the most revenue keep having one thing in common. They stick with Rails.
Come see it in person tomorrow: Brian Scanlan (Intercom) on 90% of PRs authored by Claude Code, plus talks from Konstantin Gredeskoul and Chris Davis. Free, Tuesday April 14, 5:30 PM, at Intercom SF. RSVP →
Seen a Ruby win we should cover? We’re already collecting April stories at sfruby.com. Drop leads in our Slack — 600+ Ruby builders in the Bay Area and beyond.
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