. Promptfoo? They hunt problems most teams are too scared, or too unprepared, to solve. And when you’re building a red teaming framework for AI vulnerabilities in a world obsessed with speed over safety, you don’t get to hide behind clever marketing or comfy roadmaps. You build for war. And you build it open-source.
Founded in 2024 and headquartered in San Francisco, Promptfoo is setting the tone for a new class of security-first AI infrastructure. The name’s cheeky, but the tech is lethal: a fully automated, end-to-end security platform for red-teaming LLM applications. Jailbreaks, data leaks, bias exploits, Promptfoo doesn’t just detect them, it throws elbows in real-time, embedding test cases into CI / CD workflows before your shiny new AI feature ever sees daylight.
Today, they just closed their $18.4M Series A, led by Insight Partners, with returning firepower from Andreessen Horowitz. And no surprise there, this crew doesn’t miss. When Ian Webster, former AI lead at Discord, and Michael D’Angelo, ex-VP Engineering at Smile Identity, decided to pivot from prompt evals to full-blown adversarial red-teaming, it wasn’t a flex. It was a necessity. They’d already seen firsthand how generative AI can crack wide open under pressure. So they built the pressure.
What started as an open-source toolkit is now becoming the de facto standard for AI security. Over 100,000 developers use Promptfoo’s tools. Thirty-plus Fortune 500s are already paying attention, Shopify, Amazon, Anthropic, and some heavyweights in telecom and finance. You don’t get that kind of traction by pitching “cool features.” You get it by solving real problems for real companies with real consequences.
With fresh capital locked, the focus now shifts to scaling engineering, leveling up cloud orchestration, and launching the next-gen red-teaming console in Q4. The playbook? Expand globally, partner smart, and deepen the moat around enterprise AI defense. No gimmicks. Just velocity and precision.
This isn’t about safety theater. This is about operationalizing trust in AI before the lawsuits, leaks, or black-swan exploits hit your bottom line. Promptfoo isn’t here to watch the AI security category evolve. They’re here to own it.
And if you’re building, deploying, or investing in generative AI and you’re not running red-team tests yet, well, the joke’s not on Promptfoo. It’s on you.
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If software engineering peace of mind is what you crave, Vention is your zen.
