PesMo Nano is the fastest, lowest-cost neural text-to-speech API. It runs in real time on ordinary CPUs — no GPU fleet — so you can serve millions of voice requests at up to 10× cheaper than incumbent APIs.
Today's best-sounding TTS runs on GPUs and bills by the character. Great for a demo — brutal when you're narrating a million articles, powering a call center, or giving every user a real-time voice agent. Nano flips the economics.
A non-autoregressive architecture generates a whole sentence in a single pass — under 200 ms on a CPU, about 50 ms on an L40s GPU. No GPU required.
Because it runs on commodity compute, the marginal cost of an hour of audio drops to fractions of a cent. Pass that on as up to 10× savings.
Ship it to the edge, on-prem behind your firewall, or any cloud. Your text and your users' data never have to leave your infrastructure.
Inline tags like [chuckle], [laugh] and [sigh] add natural, human warmth where you want it.
Built on public-domain and commercially-clean voice data — no cloning of real people, no licensing landmines for your product.
One REST endpoint, streaming 24 kHz audio, SDKs for the languages you already use. Swap it in where you call any TTS today.
Unedited 24 kHz samples generated by PesMo Nano — no cherry-picking, no post-processing. On UTMOS, a standard automatic naturalness metric, these score ~4.06 / 5.
“Artificial intelligence is changing the way we live and work.”
“Thank you so much for your help; I really appreciate it.”
“Our new product launches next month, and we couldn't be more excited.”
“Reading a good book by the fireplace is my favorite way to relax.”
Generated from a single checkpoint on one GPU. UTMOS is an automatic estimate of perceived naturalness and is not a substitute for human listening — press play and judge for yourself.
Illustrative cost to synthesize one million characters of speech — roughly 20+ hours of audio.
Figures are illustrative for positioning and subject to final pricing. Quality is tuned for high-volume, latency-sensitive production use — not premium voice cloning.
Be first to build on the cheapest voice API in production. We're onboarding design partners and high-volume teams now.
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