Microsoft Bot Framework (Voice)
Microsoft's bot orchestration SDK with voice channels via Direct Line Speech.
Drop your audio. Transcript in seconds. First transcript free, then $4 = 300 min
Upstream is archived. Microsoft Bot Framework (Voice)’s repository has been set read-only by its owner, so there are no further releases, fixes, or security patches. The last commit landed 2025-12-29. It can still be cloned and run, and forks may be maintained elsewhere. See the repository.
Best for azure-native teams building bots that span Teams, web, and voice. Pricing: see vendor pricing.
What it is
Microsoft Bot Framework remains a mature SDK and bot service for enterprise conversational AI on Azure. The Direct Line Speech channel exposes a voice surface, and integration with Azure AI Speech provides ASR and TTS. Microsoft is steering new builds toward Copilot Studio (Power Virtual Agents) but Bot Framework is still widely deployed.
Watch out for: LLM-native experiences typically use newer Copilot/Power Virtual Agents stack instead.
Features
| Speaker diarization | No |
| Word-level timestamps | No |
| Streaming / real-time | No |
| Languages supported | None |
| HIPAA eligible | No |
Links
Microsoft Bot Framework (Voice) vs Whipscribe
| Feature | Microsoft Bot Framework (Voice) | Whipscribe |
|---|---|---|
| Category | Transcription APIs | 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 | Cloud, API | Web, API, MCP |
Alternatives to Microsoft Bot Framework (Voice)
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.