Convex raises $57M Series B for its AI-optimised app backend

What's the deal? Convex has closed US$36.9M Series B round led by Insight Partners, with Etna LabsDealroom has a profile for this one. Try Dealroom →, Andreessen Horowitz, and Spark Capital also taking part. The deal brings the developer tooling startup's total outside funding to $110.5 million.

What does Convex do? Founded in 2021 by former members of Dropbox's infrastructure engineering team, it sells an application backend — a set of pre-packaged building blocks companies use to develop custom software. The platform powers nearly 2 million applications, with customers including OpenAIDealroom has a profile for this one. Try Dealroom → and Zapier.

What's the differentiator? Convex says its backend is optimised for AI agents, helping developers avoid hallucination-related coding errors. Its database replaces standard SQL queries with TypeScript to reduce type errors, and it pre-packages code for tasks such as real-time data syncing that AI agents otherwise struggle to generate correctly.

What's the endgame? The platform bundles a database with a search tool, an authentication mechanism, a file storage system, and a retrieval-augmented generation feature for extending AI agents' knowledge with custom datasets. Convex will use the funding to hire and improve the product.

Why it matters, in the founder's words: "Agents reach for the first thing that works, and on most backends the first thing that works is subtly, silently wrong. You'll find out weeks later, in production," said co-founder and chief executive officer Jamie Turner. "Convex is that discipline packaged as a product."

The signal: At $57 million, the round lands in the 91st percentile of all-time Series B deals for US enterprise software startups. That places Convex among the better-funded bets on infrastructure built specifically for the AI-agent coding wave.

Read more: SiliconANGLE