Best AssemblyAI Alternative
Looking for a AssemblyAI alternative? STT.ai offers superior accuracy, more models, and transparent pricing.
| Feature | STT.ai | AssemblyAI |
|---|---|---|
| Languages Supported | 100+ | Limited |
| AI Models | 15+ | 1 |
| Choose Your Model | ✓ | ✗ |
| Speaker Diarization | ✓ | Limited |
| API Access | ✓ | Paid |
| Export Formats | TXT, SRT, VTT, JSON | TXT, SRT |
| Free Tier | 600 min/mo | Limited |
| Starting Price | $8.33/mo | - |
| Client-Side Encrypted Storage | ✓ AES-256-GCM | ✗ |
| Real-Time Streaming | ✓ WebSocket | ✓ |
| AI Summarization | ✓ On-device LLM | ✗ |
| Open-Source Models | ✓ | ✗ |
Why Switch to STT.ai
More Model Choices
Pick from 15+ leading AI models to optimize for your use case.100+ Languages
Broadest language support with automatic detection.Transparent Pricing
Generous free tier and simple, predictable pricing.Developer-Friendly API
RESTful API with SDKs, webhooks, and batch processing.Pricing: STT.ai vs AssemblyAI
STT.ai
$0
/ month to start
- ✓ 600 free minutes per month
- ✓ No signup or credit card required
- ✓ All 10+ AI models included
- ✓ Speaker diarization included free
- ✓ All export formats (TXT, SRT, VTT, DOCX, JSON, PDF)
- ✓ API access on paid plans from $8.33/mo
- ✓ 100+ languages
AssemblyAI
$$$
/ month
- - Limited or no free tier
- - Signup required
- - 1 model
- - Limited or paid add-on
- - Limited export formats
- - API may cost extra
- - Limited languages
Switching from AssemblyAI?
You do not need to change your workflow. STT.ai accepts the same audio and video formats, supports the same languages, and exports to the same file types. Upload your first file and see the difference in accuracy -- it takes under 60 seconds.
No credit card. No signup. 600 free minutes per month.
Switch to STT.ai Today
Start with our free tier and experience the difference. No credit card required.
Try STT.ai FreeFrequently Asked Questions
STT.ai offers 600 free minutes/month with no signup required, supports 10+ AI models you can compare on the same file, and runs entirely in-browser for client-side privacy — none of which AssemblyAI matches on its free tier.
STT.ai's paid plans start at $5/month, with predictable per-second billing and no overage fees. AssemblyAI's pricing varies; the comparison table above shows current rates side by side.
STT.ai lets you compare multiple models on the same file with our compare-stt tool — AssemblyAI typically locks you to a single model. If accuracy is mission-critical, run a real sample through both and check the WER.
Yes. STT.ai's REST API uses the same audio-input → transcript-output contract as AssemblyAI's. Python and Node.js SDKs include side-by-side examples. Most migrations take under an hour.
STT.ai supports 100+ languages across our model lineup, which covers everything AssemblyAI does plus more long-tail languages via Whisper Large V3. The languages page lists per-model support.
Yes. Speaker diarization runs on every STT.ai transcription, labeled Speaker 1, Speaker 2, ... with rename support in the editor. Quality is comparable to AssemblyAI's and works across all our models.
STT.ai's REST API has Python + Node.js SDKs, webhook callbacks, model selection per request, and an MCP server for Claude/Cursor — features not all of which exist in AssemblyAI's API.
STT.ai offers client-side encryption on Pro plans (your transcripts are unreadable without your key, even to us) and Private Cloud for self-hosting in your own VPC. AssemblyAI typically doesn't offer comparable encryption guarantees.
Yes. STT.ai supports live transcription via WebSocket streaming — the same latency profile as AssemblyAI. You can dictate, transcribe meetings, or caption live events.
STT.ai exports SRT/VTT subtitles with timestamps, plus burn-in via the burn-subtitles tool and timeline-based editing via subtitle-editor. AssemblyAI's subtitle workflow is comparable; STT.ai adds a free standalone subtitle-editor that doesn't require an account.
STT.ai supports files up to 2 GB across every plan, with free users getting 1 hour per file. Paid plans extend that to 8+ hours. AssemblyAI's file limits vary by plan; check the comparison table above for current numbers.
STT.ai's differentiators include: multi-model comparison on the same file, MCP server integration for AI agents, client-side encryption for transcript storage, an open-source Chrome extension, and free standalone tools (subtitle editor, audio trimmer, etc.) — most of which AssemblyAI doesn't ship.
Try STT.ai's free 600 minutes/month and run a representative sample through both — if STT.ai's output is at parity (or better) and the pricing fits, migration is straightforward via our REST API. The compare-stt tool makes the head-to-head comparison concrete.