Wispr has raised $25 million in a Series A extension just five months after closing a $30 million Series A led by Menlo Ventures. The voice-to-text AI company, which has 40% month-over-month growth, brought in the new capital from Notable Capital, the firm behind early investments in Airbnb, Slack, Coinbase, Anthropic, and TikTok. With this round, Wispr has now raised $81 million total and sits at a $700 million post-money valuation.
Wispr Flow, the company’s voice dictation app, is actually working. Users aren’t just trying it once. They’re using it for the majority of their typing. After six months, the average user writes 72% of their characters through Flow. That’s a substitution where typing is being replaced.
For decades, voice-to-text has been a broken promise. Apple’s Siri struggles with accuracy. Google’s Recorder requires extensive manual editing. Amazon’s Alexa can’t handle real-time transcription without errors. The fundamental problem isn’t transcription.
The problem is polish. The voice is messy, people speak in fragments, with filler words, without punctuation, with natural hesitations. Converting raw speech into publishable text requires intelligence, not just accuracy.
Wispr solved it. Flow removes filler words automatically, adds proper punctuation, formats text based on context (an email looks different than a Slack message), and maintains consistency across 25,000 apps and websites. Most importantly, 90% of what users dictate requires zero edits, compared to 10% for Siri and 73% error rate for Apple’s native transcription.
“Voice never reached its potential because the industry treated it as a feature instead of an interface. We’re picking up where others left off, and the growing migration of users to Wispr reinforces how much demand there is for a dependable voice interface,” CEO Tanay Kothari said.
The Metrics That Matter
The numbers paint a picture of real product-market fit. After just three months of usage, the average user writes more than 50% of their characters through Flow. By six months, that jumps to 72%. Over 12 months, Wispr maintains a 70% retention rate, in a space where retention typically craters.
The company has achieved 100x user base growth year-over-year. Fortune 500 penetration stands at 270 companies. In recent weeks, Wispr has been signing 125 enterprise customers per week. That’s not marketing hype, that’s sustainable demand.
Wispr’s error rate sits at around 10%, significantly lower than OpenAI’s Whisper (27%) and Apple’s transcription (47%). For professionals who need to trust voice-to-text, that difference is material.
The Series A extension just months after Series A is unusual. But it makes sense given two factors. Explosive growth, and VC conviction about missing out. Wispr Flow has become popular within the VC community itself. Partners use it, love it, and suddenly realize they should be invested.
“We were still not planning to raise anytime soon because we had a really long runway and the team’s really lean. But when I heard from Hans and Steven, it made sense to put something together to bring them on,” said Tanay.
Hans Tung, the lead investor from Notable Capital, is a storied venture capitalist with 13 Forbes Midas List appearances. His belief in Wispr’s vision validates the thesis that voice should be treated as the primary computing interface, not a feature.
Vision and Partnerships
Wispr is building proprietary voice-first foundation models designed to create a “voice operating system,” a computing environment where speech is the primary interface, not keyboard and mouse. That’s much bigger than replacing typing.
The company is investing heavily in personalized Automatic Speech Recognition (ASR), models trained on individual users’ speech patterns to reduce errors further. It’s working on Android (beta by year-end, stable by Q1 2026). It’s testing enterprise APIs with select partners. And it’s exploring workflow automation, imagine asking Flow to draft and send an email, not just transcribe one.
Wispr isn’t alone in this space. YC-backed Willow focuses on voice editing across iOS apps. Aqua, Monologue, Typeless, TalkTastic, Superwhisper, and BetterDictation all compete in voice dictation. But most are point solutions. They’re apps you use occasionally, not tools that become your default writing interface.
Wispr’s advantage is singularly focused. Make voice dictation so good that users default to it, not typing. The metrics suggest they’re winning that battle.
The investment also brings a partnership with Steven Bartlett’s The Diary of a CEO podcast, one of the world’s top 10 podcasts with 35 million subscribers. For a year, they’ll feature content around voice as the future interface for productivity. For a startup, that’s distribution most venture firms can’t buy.
“Wispr is tackling one of the most ambitious challenges in technology: reimagining the primary interface between humans and machines. The founders’ vision, speed, and craftsmanship stand out even among the best teams we’ve seen. My colleague Chelcie Taylor and I believe Wispr is building the foundation for a new generation of AI-driven interfaces, and we’re proud to partner with them in that mission,” said Hans.
