I’m excited to share that Standard Capital led the Series A for Momentic, founded by Wei-Wei Wu and Jeff An. We just published a conversation where I sat down with them to talk through what they’re building, how they got here, and why this space is moving so quickly. I wanted to summarize the big ideas from our interview for folks who prefer to read.
Momentic builds a modern testing platform that lets teams describe end-to-end user journeys—login flows, page creation, mobile actions—using plain English. Traditional systems like Selenium, Cypress, and Playwright are powerful but brittle. They require constant engineering effort just to keep tests running. Momentic turns this on its head: the tests act as the “source of truth” for how your product is supposed to behave, and the platform handles the verification.
As we all know, AI tools can generate code faster than ever, but verification hasn’t kept up. You can vibe-code a big diff and ship something broken without realizing it. The Momentic pitch clicked for me immediately: the more code is produced by LLMs, the more guardrails you need to keep the product working. In their framing, English becomes the programming language of the future—not just for writing code, but for verifying it.
The founding story is very on-brand for two people who were clearly meant to work together. Jeff was exploring ideas in the testing space at the end of 2023. Through a chain of mutual connections—including the KP Fellows program and Heap’s CTO—he eventually got introduced to Wei-Wei, who had been building a prototype from the opposite direction. They compared notes, realized the pieces fit, and started sprinting together. They flew down, jammed for a couple of weeks, applied to YC on the literal deadline, got in, and kept building.
Unlike a lot of teams, the core idea never changed. The name changed—originally “Screenwriter”—but the vision stayed the same: apply AI to a category that hasn’t meaningfully evolved in twenty years.
Their customer stories say a lot. Notion migrated from a huge Selenium suite to Momentic, and now every engineer’s merge path depends on Momentic tests passing. They run millions of tests per week with five-nines reliability. The Quora (po.com) team cut their QA cycle from seven hours to thirty minutes. And the demand has pushed them beyond web: mobile and desktop testing are now on the roadmap.
With the Series A closed, the company is scaling fast and hiring. They’re tackling problems that are simultaneously important, high-scale, and brand-new—a rare combination. They’re now processing over a billion tokens an hour and even hit the threshold to earn the OpenAI “plaque,” which, as I told them, is a real badge of honor around here.
Wei-Wei and Jeff are building something essential for the future of software development, and I’m thrilled we get to back them at this stage. I’m excited to see what they ship next.