Fish Audio alternative for streaming text to speech
Bring speech into your product with Lightning’s streaming API, configurable pronunciation, and model-specific voices. Use Smallest for the speech layer today, with a path to phone agents as your workflow grows.
Is Smallest a Fish Audio alternative for live applications?
Yes. Smallest Lightning is a Fish Audio alternative for streaming speech inside your application, with voice, language, and pronunciation settings in the API request. Fish Audio also offers a speech API, and its expressive cues and Story Studio may better suit multi-speaker content creation. Choose based on the interaction you’re building and the voice controls it needs.
Smallest vs Fish Audio: speech APIs and voice controls
Compare streaming, voice selection, and delivery controls for speech inside an application. Fish Story Studio also supports a separate multi-speaker content creation workflow.
| Smallest AI | Fish Audio | |
|---|---|---|
| Primary speech product | Lightning TTS API | TTS API and Story Studio |
| Model selection | Lightning standard or Pro | S2.1-Pro recommended for production |
| Streaming | HTTP, SSE, and WebSocket | Realtime streaming documented |
| Delivery controls | Speed, language, and pronunciation dictionaries | Natural-language cues and multi-speaker dialogue |
| Voice workflow | Model-specific voice catalog | Voice cloning and storytelling tools |
Add configurable speech to your application with Lightning
Make speech part of the product
Send application text to Lightning and return audio through HTTP or streaming endpoints, so the speech experience is built around your own interface and business logic.
Keep terminology in your control
Add a pronunciation dictionary for brand names, services, and recurring phrases. Select a compatible voice and model, then adjust speaking speed for the interaction.
Take the next step into phone workflows
For support, bookings, or outreach, Atoms adds agent operations alongside Smallest’s model APIs, so your next use case can go beyond generating a recording.
Use Lightning for spoken product answers
Give shoppers spoken answers about fit, availability, or delivery. Your application supplies the answer, and Lightning supplies the audio. If a purchase needs a phone conversation, Atoms is a separate path for that workflow.
1
Retrieve the product details relevant to the question.
2
Generate the spoken answer with your chosen Lightning voice.
3
Offer a phone agent where the purchase needs a conversation.
Smallest TTS pricing for Fish Audio users
Use your application’s character volume to estimate Lightning usage. Budget narration projects and live conversational workloads separately, because their output and retry patterns differ.
Lightning v3.1
Approximately $0.175 per 10,000 characters on the published pay-as-you-go model plan.
Lightning v3.1 Pro
Approximately $0.195 per 10,000 characters on the published pay-as-you-go model plan.
Your complete application
Wire the request into your player, listen to complete user journeys, and roll the change out to a limited audience before expanding.
Should you choose Smallest or Fist Audio?
Choose Smallest AI when
Turn speech into an interactive product
Choose Smallest when your priority is spoken responses inside a live application, with an API for speech generation and a separate platform for phone conversations.
Choose
Fish Audio
When
When Fish Audio may be the better fit
Look closely at Fish Audio when multi-speaker storytelling, expressive cues, or the Story Studio authoring experience is the central requirement. Those creation workflows are different from embedding speech in a live product.
Frequently asked questions
Is Smallest an alternative to Fish Audio for an application API?
Can I move Fish Audio expression cues directly to Lightning?
Does this page compare Fish Story Studio with a Smallest editor?
Which Fish Audio model is relevant to a current comparison?
Can Smallest handle a phone conversation?