Pricing
- Most accurate speech-to-text model
- Supports multiple languages
- Highly accurate
- Trained on over 12.5 million hours of audio data
- Fastest path to working voice agents
- Built on Realtime Speech-to-Text API
- Transcribe live audio with ultra-low latency
- Best-in-class accuracy
Pricing from the official site, verified Jun 2026. Always confirm current prices on the vendor site.
Pros & cons
Our analysisPros
- API with speaker labels and timestamps
- Offers summarization, sentiment, and topic detection
- Usage-based pricing fits small and large workloads
- SDKs for Python, JavaScript, and more
- Free tier covers development and testing volume
Cons
- Accuracy strongest for English; other languages vary
- No listed third-party integrations
- Primarily developer-facing, not a consumer UI
What users say
AssemblyAI is commonly used by developers who need to add speech-to-text and audio analysis to their own products without building the underlying models. A frequently noted strength is the breadth of audio intelligence features — transcription, summarization, sentiment, and chapter detection — available through a single API call. A common limitation is that accuracy is most competitive for English content, and the service is entirely API-driven with no consumer-facing interface.
Editorial summary based on public information.
Best for
Developers building transcription or audio-intelligence features into applications
Manually choose competitor 
AssemblyAI
Otter.ai
The co-pilot for your product team
LUCYD AUDIO EYEWEAR
Speakflow
Beepbooply
Voqal
Altered
UnitText| Feature | AssemblyAI | Otter.ai |
|---|---|---|
| Pricing | Freemium | Paid |
| Price from | $0.15/mo | $19.99/mo |
| Free tier | Yes | No |
| API | Yes | Waitlist |
| Open source | No | No |
| Platforms | Web | API |
| Models | Assemblyai | Otter |
| Context window | 8k | 8k |
| Launched | 2017 | 2016 |
| Languages | 99 languages | — |
| Integrations | — | Slack, Zoom, Salesforce +8 more |
Top alternatives to AssemblyAI
See all alternatives → Otter.ai
Live meeting transcription with automatic summaries and action items.
The co-pilot for your product team
Aggregate customer feedback to drive decisions
LUCYD AUDIO EYEWEAR
Smart glasses that blend style with connected technology
Speakflow
Online teleprompter with voice-activated scrolling
Beepbooply
Convert text to speech in 900+ voices and 80+ languages
Voqal
Write code using voice commands
Verified Jun 2026
Specs
| Pricing | Freemium |
|---|---|
| Price from | $0.15/mo |
| Free tier | Yes |
| API | Yes |
| Open source | No |
| Platforms | Web |
| Models | Assemblyai |
| Languages | 99 languages |
| Context window | 8k |
| Launched | 2017 |