Wispr Secures $25 Million in Series B Funding: User Growth Surpasses 100 Times Annually, Plans to Develop Its Own ASR to Reduce Error Rate to 10%

Speech AI startup Wispr announced a $25 million Series B+ round led by Notable Capital, with participation from Steven Bartlett’s Flight Fund, bringing total funding to $81 million. The company revealed that Flow Dictation achieved an average of 50% of characters input through voice within three months of its launch, and enterprise clients have already covered 270 Fortune 500 companies and 125 paid institutions.

Core product data  

- User base: Year-over-year growth of 100 times, 70% retention after 12 months; monthly growth rate has maintained 40% since June, creating word-of-mouth buzz in the VC community.  

- Technical metrics: Self-developed personalized ASR error rate of 10%, lower than OpenAI Whisper's 27% and Apple's 47%; aiming to reduce it further to less than 5%.  

- Platform expansion: Windows/Mac/iOS are now available, Android Beta is expected to be released by year-end, with the stable version planned for Q1 2026; Windows on ARM and iPad version are under development simultaneously.

This funding round will be used to recruit ML talent, expand the international team, and open up APIs. The company is testing voice-driven workflows, such as one-click voice reply to emails and filling out forms, aiming to upgrade from a "dictation tool" to a "voice-first operating system." Hans Tung, a partner at Notable, has joined the board as an observer. He commented that Wispr's user experience has the potential for "Airbnb-level" network effects.