ElevenLabs alternative for streaming text to speech
Build spoken responses with Lightning TTS, from a single API request to a continuous text stream. Control pronunciation, pair each voice with the right model, and add Smallest voice agents when your product needs calling.
When is Smallest an alternative to ElevenLabs?
Smallest Lightning is an ElevenLabs alternative when you need streaming text to speech, explicit pronunciation settings, and an API for your own application. Smallest also offers Atoms for hosted voice agents. Keep ElevenLabs on your shortlist when a particular voice, expressive model, or established production workflow is essential, and compare that exact model and use case before switching.
Smallest vs ElevenLabs: TTS models and integration
Compare the models, streaming interfaces, and voice controls for your application. Both vendors also offer separate agent products.
| Smallest AI | ElevenLabs | |
|---|---|---|
| Speech models | Lightning standard and Pro | Multiple expressive and realtime models |
| Voice selection | Pair a voice with its Lightning model | Voice endpoint with model selection |
| Pronunciation | Per-request dictionaries | Pronunciation-related API controls |
| Delivery controls | Speed and language settings | Model-dependent tags, punctuation, and breaks |
| Complete agents | Separate Atoms platform | Separate ElevenAgents product |
Build application speech with Lightning TTS
Speak as your application responds
Lightning’s live endpoint accepts incremental text, so it works as a building block for conversational interfaces. Use synchronous synthesis when you already have the complete message.
Give important words deliberate treatment
Set pronunciation dictionaries, speaking speed, and language in each request, so recurring names and terms sound the way listeners expect.
Add agent operations when you need them
Use Smallest’s voice agent platform for calling and operational workflows, alongside the model APIs for products that already own the conversation.
Use Lightning to read account updates aloud
A financial app’s spoken summary may include a customer name, a date, and several amounts. Keep those values in your application data, then generate a fresh response with the right language and pronunciation settings.
1
Assemble the summary from current account data.
2
Apply the vocabulary and number-reading rules your audience needs.
3
Play the response in your app’s existing audio player.
Smallest TTS pricing for ElevenLabs users
Estimate Lightning using the characters you send for synthesis. Treat a complete agent deployment as its own cost model, with transcription, reasoning, calling, and platform services.
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
Check the complete interaction, including dates, amounts, and playback. Route a small share of usage to Lightning and review the results.
Should you choose Smallest or ElevenLabs?
Choose Smallest AI when
Should you choose Smallest or Vapi?
Choose Smallest for application speech with explicit model, voice, and pronunciation settings, plus a path to hosted agents when the conversation needs calling and operations.
Choose
ElevenLabs
When
When ElevenLabs may be the better fit
Keep ElevenLabs when a particular voice, expressive model, or existing production workflow is essential to your output. Its model selection guide is the right place to identify that dependency.
Frequently asked questions
Is Smallest an ElevenLabs alternative for developers?
Can I keep my existing LLM and use Lightning for speech?
Will ElevenLabs audio tags work in Lightning?
Should I choose Lightning standard or Pro?
Does this comparison cover ElevenAgents?