Stack AI
No-code platform for building AI workflows including voice agents and assistants.
Drop your audio. Transcript in seconds. First transcript free, then $4 = 300 min
Best for internal automation and customer-facing assistants with mixed text+voice surfaces. Pricing: see vendor pricing.
What it is
Stack AI is a workflow builder that chains LLMs, vector stores, tools, and APIs into deployable assistants. Voice agents are one supported output channel, layered over Twilio or Vapi for PSTN delivery. Stack AI positions toward enterprise IT and operations teams that need quick wins across knowledge bots, RAG search, and lightweight phone assistants.
Watch out for: Voice features lighter than dedicated voice-AI vendors; favors chat workflows.
Features
| Speaker diarization | No |
| Word-level timestamps | No |
| Streaming / real-time | No |
| Languages supported | None |
| HIPAA eligible | No |
Stack AI vs Whipscribe
| Feature | Stack AI | Whipscribe |
|---|---|---|
| Category | Products | Transcription APIs |
| Pricing | Not verified | $4–$24 one-time packs (credits never expire) · $2 single unlock · 60 min free on signup |
| Speaker diarization | Not verified | Yes |
| Word timestamps | Not verified | Yes |
| Streaming | Not verified | No |
| Languages | — | 99 |
| Platforms | Web, Cloud | Web, API, MCP |
Alternatives to Stack AI
Whipscribe is a managed faster-whisper + whisperX service. If you want transcripts without running infrastructure, paste a URL or drop a file in the form below — you'll have a transcript in seconds.