Startups

Wispr raises $280M at $2B valuation, launches Canto speech model as it moves past dictation

The AI voice startup, used inside almost every Fortune 500, nearly tripled its valuation in nine months and shipped its first in-house speech model as competition from Apple, Google and Microsoft intensifies.

By Giulia Donatello · Startups & funding · 2026-08-18 · 3 min read

Photo: Unsplash / Matthias Wagner — Close-up of a microphone against a dark background, evoking voice-driven computing.

Wispr closed a $280 million Series B at a $2 billion valuation on August 17, roughly nine months after a $25 million Series A extension pegged the San Francisco dictation company at $700 million. Menlo Ventures led. The valuation has nearly tripled since November, and total capital raised now sits at $361 million.

The round arrives with a product story attached, which is what distinguishes it from the usual AI-adjacent markup. Wispr shipped Canto, its first proprietary speech-recognition model, built directly into Flow. Internal benchmarks cited by the company put error rates in noisy environments at 5% to 10%, down from about 30% on the third-party models it was previously routing through. That’s the pitch to enterprise buyers, and the numbers behind the pitch are unusually specific: revenue growth above 150% for four straight quarters, more than 10,000 enterprises on Flow, penetration into almost every Fortune 500, and over 60 billion words dictated on the platform.

The competitive frame is where things get interesting. Wispr is now building against Apple, Google, Microsoft, Anthropic and OpenAI on the model layer, against Granola, Fireflies and Read AI in meeting notetakers (Wispr Notetaker launched into that fight), and against Willow, Monologue, Aqua and Superwhisper at the prosumer tier. Standing up an in-house model is how you stop being a wrapper. It’s also how you justify a $2 billion mark.

To that end, CEO Tanay Kothari stood up Wispr Interface Labs last month under Ariya Rastrow, an early Amazon Alexa engineer. The subsidiary framing signals that Kothari sees speech as infrastructure rather than a feature.

The cap table tells its own story. Notable Capital, NEA, Neo Ventures, 8VC and MVP Ventures re-upped; Acrew, Forerunner, Goodwater, Peak XV, Together Fund and PLUS Capital came in new. So did a roster of athlete investors, Livvy Dunne, Shaun White, Dak Prescott, Joe Burrow, Klay Thompson, Paul George and Trae Young, the kind of check that reads as brand distribution rather than diligence.

Michael Ashley Schulman of Cerity Partners, quoted by Reuters, called Wispr’s trajectory “dictations only the beginning.” That phrasing is doing the work the valuation needs it to do.

Sources