Onepin
AI voice production agent fixing names, prices and dates before they ship
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Onepin is an AI voice production agent that sits as a quality layer on top of text-to-speech engines. Instead of locking into one provider, it connects 30+ engines including ElevenLabs, OpenAI and Google, routing each line to the best model automatically.
The problem it solves is real: synthetic voices sound natural now, but they still stumble on names, prices and dates. Onepin's 4-million-word pronunciation dictionary catches errors before they reach a listener's ear.
Every line gets scored on four criteria: naturalness, word accuracy, clarity and pronunciation. If a model misreads a single word, Onepin fixes just that word in the same voice without re-rendering the entire take.
Onepin supports 10+ locales today with plans to expand to 30. It ships with API, SDK and MCP from day one, and holds SOC 2 Type II certification for enterprise teams.
AI-assisted draft, human-reviewed before publishing — see how we choose & review tools.
Why we picked it
Most AI voice tools focus on how the voice sounds. Onepin focuses on what comes after: is the name right, the price clear, the date readable? That quality layer is missing from most voice production pipelines today.
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