Wispr has raised a $25 million Series A Extension to accelerate development of its voice-first operating system, bringing the company’s total funding to $81 million. The investment was led by Notable Capital, with additional participation from Flight Fund, the investment arm of entrepreneur and The Diary of a CEO host Steven Bartlett.
The announcement comes only months after Wispr closed its $30 million Series A and follows sustained month-over-month growth of 40 percent in both users and annual recurring revenue.
Headquartered in San Francisco, the company is building voice-first foundation models that aim to make speech the primary interface across computing. Wispr’s ambition is to move beyond traditional dictation tools and establish the core infrastructure for a voice-native computing ecosystem. The new capital will support expanded hiring across engineering and product teams focused on enhancing its flagship product, Flow, and continuing to broaden its capabilities.
Wispr’s leadership believes voice has lagged because major technology companies failed to treat it as a central interface, which left existing tools inconsistent and unreliable across apps. By contrast, Flow is designed to provide dependable, context-aware speech-to-text performance within any application. The company reports that 90% of the text produced with Flow requires no user editing, a stark improvement over legacy tools. Flow is now used across more than 25,000 apps and websites and helps hundreds of thousands of users convert speech into clean, structured writing. The company also reports that after six months of using Flow, the average user writes more than 70% of their characters on the platform.
The new funding also introduces a strategic partnership with The Diary of a CEO, one of the world’s largest podcasts with more than one billion streams and an audience of over thirty-five million subscribers across platforms. The year-long collaboration will span audio, video, and digital formats to highlight how voice is emerging as a central interface for human productivity. The investment further strengthens Wispr’s global presence as it continues scaling its technology for both consumer and enterprise applications.
Notable Capital, led by Managing Partner Hans Tung, becomes a key strategic partner for the company. The firm has backed category-defining companies such as Affirm, Airbnb, Slack, Coinbase, Anthropic, and TikTok. Tung joins Wispr as a board observer and brings experience investing in companies that have redefined markets across commerce, consumer technology, and AI.
Wispr believes that the strong investor interest only months after its prior funding round reflects the accelerating momentum behind voice-driven computing. The company plans to use the new capital to strengthen product development, expand global reach, and continue building what it views as the foundation for the next major shift in human-computer interaction.
KEY QUOTES:
“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. We’re building a system designed to make speech a primary mode of computing so that people can work at the speed of thought, on any platform. The strong inbound interest from investors just a few short months since our last raise shows how powerful this vision has become and gives us the ability to scale it faster.”
Tanay Kothari, Co-Founder and CEO, Wispr
“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.”
Hans Tung, Managing Partner, Notable Capital
“Voice is the natural interface for human thought, but we’ve accepted typing because it was the only option. Now, with AI able to understand the nuance in how each of us speaks and thinks, we can finally remove that bottleneck. Wispr’s founders recognized what the market is only now beginning to see: that voice will reshape how we interact with technology. The caliber of critical thinking and technical prowess behind Flow is exactly what I look for: a team that sees where the world is heading and has the depth not only to build it, but to completely redefine how we all work in the process.”
Steven Bartlett, Founder of Flight Fund and Host of The Diary of a CEO
