smallest.ai

Voice AI platform with TTS, STT and agent APIs for developers

Intermediate API
Screenshot of smallest.ai, Voice AI platform with TTS, STT and agent APIs for developers

What is smallest.ai?

smallest.ai is a text-to-speech tool. Smallest AI offers text-to-speech, speech-to-text, speech-to-speech and a small language model, plus a voice agent platform. It targets developers and enterprises building low-latency phone and conversational products, with compliance certifications and on-premise options.

Smallest AI is a voice AI platform that bundles speech models and an agent builder into one stack. The model lineup covers text-to-speech (Lightning V3.1 Pro, quoted at 100 ms latency across more than 15 languages), speech-to-text (Pulse Realtime, covering 38 languages with emotion and speaker detection), a small language model called Electron, and Hydra, a native speech-to-speech model. Voice cloning and a public voice library sit alongside these. The audience is mainly developers and enterprises building phone and conversational products. On the developer side, the homepage shows a plain HTTP request that posts text, a voice ID, a sample rate and an output format to the API and saves the returned audio file, with access handled through an API key created in the account settings. On the product side, an agent platform lets teams configure an agent, choose a voice, set languages and go live from one interface, with a playground for testing. Industry pages target healthcare, real estate, travel and hospitality, automobile, banking and e-commerce, and an on-premise option exists for organisations that cannot send audio to a hosted service. In practice the workflow starts with the interactive demo or the playground, moves to an API key, and then to either direct model calls or a configured agent. Enterprise buyers are routed to a sales form that promises a forward-deployed engineer and large concurrent call volumes. Security claims include ISO 27001, SOC 2 Type 2, GDPR and HIPAA compliance. Customer stories cite a speech-to-text deployment at Pocket and a collections-call use case at Kogta. Among alternatives, it competes with dedicated speech vendors and with voice agent orchestration platforms. Its differentiator is owning the whole chain: recognition, language model, synthesis and a speech-to-speech option from one vendor, which can reduce latency and integration work. The trade-off is dependence on a single provider for every layer, and the homepage leaves detailed pricing to a separate page.

How do you use smallest.ai?

  1. 1Try the demo on the homepage
    Use the interactive agent and speech generation demo to hear a voice and judge latency before creating an account.
    smallest.ai — Try the demo on the homepage
  2. 2Create an account
    Sign up or log in through the web app to reach the agent platform and playground.
    smallest.ai — Create an account
  3. 3Generate an API key
    Follow the API keys documentation to create a key, which is passed as a Bearer token in requests.
    smallest.ai — Generate an API key
  4. 4Call the text-to-speech API
    Send a POST request with text, a voice ID, sample rate and output format, then save the returned audio as a file.
    smallest.ai — Call the text-to-speech API
  5. 5Build and launch a voice agent
    In the agent platform, configure the agent, pick a voice, set languages and test it in the playground before going live.
    smallest.ai — Build and launch a voice agent

Pros and cons

Pros

  • Covers the full voice stack: TTS, STT, speech-to-speech, a small language model and an agent builderAI
  • Low latency is a stated focus, with TTS quoted at 100 ms across 15+ languagesAI
  • Speech-to-text supports 38 languages with emotion and speaker detectionAI
  • Lists ISO 27001, SOC 2 Type 2, GDPR and HIPAA compliance, useful for regulated sectorsAI
  • On-premise deployment and industry-specific pages suit enterprise rolloutsAI

Cons

  • The homepage gives no pricing figures, so costs require visiting the pricing page or contacting salesAI
  • Enterprise messaging dominates, which may leave hobbyists and small teams with less guidanceAI
  • Using every layer from one vendor creates lock-in across recognition, language model and synthesisAI
  • Performance claims such as latency and accuracy are vendor statements with no benchmarks on the homepageAI
  • The sales form shows inconsistent latency figures (sub-100ms and sub-500ms), which blurs expectationsAI

How much does smallest.ai cost?

Pricing

The homepage lists no prices. A dedicated pricing page for agents exists, and enterprise buyers are directed to a sales demo form.

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Support

Documentation for agents and models, a public status page, a Discord community and a sales team offering a forward-deployed engineer for enterprise customers.

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Integrations

An integrations page is linked from the footer, but the homepage does not detail specific integrations. Access is through REST-style APIs and API keys.

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Features

Text-to-speech (Lightning V3.1 Pro), speech-to-text (Pulse Realtime), Electron small language model, Hydra speech-to-speech, voice cloning, a voice library, an agent platform with playground, on-premise deployment and industry-specific solutions.

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Frequently asked questions about smallest.ai

  • How much does smallest.ai cost?
    The homepage lists no prices. A dedicated pricing page for agents exists, and enterprise buyers are directed to a sales demo form.
  • Does smallest.ai have an API?
    Yes, smallest.ai offers an API.
  • How do you use smallest.ai?
    The walkthrough on this page covers 5 steps: 1. Try the demo on the homepage 2. Create an account 3. Generate an API key 4. Call the text-to-speech API 5. Build and launch a voice agent.
  • What platforms does smallest.ai support?
    smallest.ai is available on Web App.
  • What does smallest.ai integrate with?
    An integrations page is linked from the footer, but the homepage does not detail specific integrations. Access is through REST-style APIs and API keys.
  • What are the limitations of smallest.ai?
    The homepage gives no pricing figures, so costs require visiting the pricing page or contacting sales. Enterprise messaging dominates, which may leave hobbyists and small teams with less guidance. Using every layer from one vendor creates lock-in across recognition, language model and synthesis.

Status

StatusActive
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Added10/8/2026

Platforms

Web App

Pricing

Paid