AI voice production agent that spells out prices and dates, checks name pronunciations against a 4M-word dictionary, and auto-fixes misread words.
Onepin homepage — AI voice production agent
1 / 3Overview
What is Onepin?
Human voice, right words.
Onepin is an AI voice production agent that turns scripts into ship-ready voiceovers. It runs on top of the TTS models teams already use — 30+ models from 19 providers including ElevenLabs, OpenAI, and Google — automatically picking the best model per language, or letting you bring your own keys.
Before a line is rendered, Onepin spells out prices, dates, and abbreviations the way they should be spoken, checks names and brands against a 4-million-word pronunciation dictionary, and scores every line for naturalness, clarity, word accuracy, and pronunciation. When a word is misread, it fixes just that word instead of re-rendering the whole take, keeping the original voice style intact.
The free plan starts with 1,000 one-time credits and no credit card required; paid plans start at $16/month with annual billing. Integrations include API, CLI, SDK, Agent, and MCP, with Premiere and DaVinci plugins in development. Users own the audio they generate, and the platform is SOC 2 compliant.
Platforms and languages
Onepin Availability
Platforms
Languages
Capabilities
Onepin Key Features
Spell-out normalization
Spells out prices, dates, and abbreviations into natural spoken phrasing before the voice reads them.
Pronunciation validation
Checks names, brands, and technical terms against a 4-million-word pronunciation dictionary and corrects errors.
Per-line scoring
Grades every line for naturalness, clarity, word accuracy, and pronunciation against your own standards.
Model auto-routing
Runs on 30+ TTS models from 19 providers, automatically picking the best model per language, with bring-your-own-key support.
Word-level fixes
Corrects only the misread words instead of re-rendering the whole take, preserving the original voice style.
Best for
Who uses Onepin?
Content and production teams
Deliver multilingual AI voiceovers at scale for product videos, ads, explainers, audiobooks, and courses
Independent creators
Generate reliable AI voiceovers for podcasts, videos, and audiobooks with correct pronunciation out of the box
Plans and access
Onepin Pricing
Freemium
Free plan with 1,000 one-time credits; paid plans from $16/mo with annual billing
Common questions
Onepin FAQs
Is there a free plan?
Yes. The Free plan includes 1,000 one-time credits and requires no credit card; you can even try Onepin on the homepage without signing up.
How does pricing work?
Plans start at $0. Paid plans are Creator at $16/month and Studio at $80/month on annual billing (20% off). Usage is measured in credits — 100 credits equal $1 — and one credit covers both generation and validation.
Which languages are supported?
10 languages across 11 regions: English (US/UK), Chinese (CN), French, German, Japanese, Korean, Portuguese (BR/PT), and Spanish (ES/MX). More languages are on the roadmap.
Can I keep using the voices I already use?
Yes. Onepin runs on 30+ TTS models from providers like ElevenLabs, OpenAI, and Google, auto-selects the best model per language, and supports bringing your own keys. Integrations include API, CLI, SDK, Agent, and MCP.
Do I own the audio I generate?
Yes, you own the generated audio and can use it commercially. The platform is SOC 2 compliant on all plans.
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