Rime Raises $24M Series A to Scale Enterprise Voice AI
Artificial intelligence has certainly come a long way, especially in voice generation. However, there’s still one major problem. The voices from even the biggest names often sound cold, stiff and lacking any form of human warmth. Rime is a Silicon Valley startup that wants to change that.
With the news that Rime raises $24M in Series A funding, the company is set to scale its groundbreaking conversational AI. Rime revealed the investment round was led by M13, with Twilio Ventures, Corazon Capital, and Unusual Ventures participating. The funding will help Rime continue to develop into the world’s first enterprise-ready voice-to-speech platform.
Why Linguistics Matters More Than Model Size
Rime Cofounders and Rafael. Image Credit: Boris Zharkov
Some of the best AI voice generators try to solve the robotic voice problem by throwing massive computing power at it. They build bigger models and hope for the best. Rime takes a completely different path. Founded by Lily Clifford, Brooke Larson, and Ares Geovanis, the startup leans heavily on academic speech science.
They believe the team defining the next voice interface must understand how human language actually works. To double down on this, Rime hired Rafael Valle as Chief Science Officer. Valle previously ran audio research at Meta’s Super Intelligence Lab.
Together, the team is building a massive, expressive conversational dataset. Instead of chasing generic signals, they analyze actual speech rhythm, speed, and emotional cues. This lets them design voices that don’t just sound realistic but genuinely empathetic.
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Real-World Results for Major Enterprises
Rime has already built up a massive following in live phone line conversations. Today the platform is used to power almost 100 million customer interactions per month. Industry leaders such as Mayo Clinic, Dialpad, Upstart and Asurion are handling high-volume calls with Rime.
The business impact is backed by hard data. A recent independent study by Miravoice analyzed 100,000 live calls across multiple voice providers. The results were clear. Rime’s voices significantly reduced the rate of customers hanging up during the intro. It also delivered the fastest median time to completion.
By using natural cadences, Rime keeps customers engaged and gets their problems solved faster. A minor pronunciation error or a clunky pause can quickly ruin customer trust. Security is also a major hurdle. Rime solves this by focusing on the voice modeling layer while ensuring strict HIPAA compliance.
For financial platforms like Upstart, precision is everything. Handling complex terms and sensitive account details requires absolute accuracy. Rime’s linguistics-first engine adapts beautifully to these strict environments. It handles specialized terminology with ease, giving enterprises the confidence to automate their most sensitive customer touchpoints.
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Scaling Up the Voice Interface
With this new funding round, Rime has big plans for the future. The company is actively investing in its proprietary conversational data to make its models even more expressive.
They are also expanding their engineering and research teams to handle rapidly growing infrastructure demands. As part of the funding, Morgan Blumberg from M13 will join Rime’s Board of Directors. The ultimate goal is to move past traditional systems.
Rime is working toward real-time speech-to-speech models that eliminate all awkward lag. By bridging academic research and enterprise scale, Rime is building the ultimate voice interface.
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