Cobalt Speech (Cubic / Diatheke)
On-prem ASR + dialog stack popular in defense, regulated finance, and accessibility.
On-prem ASR + dialog stack popular in defense, regulated finance, and accessibility.
Best for air-gapped, defense, finance, or accessibility deployments where the audio must never leave the customer network. Pricing: Contact sales.
What it is
Cobalt Speech & Language builds Cubic (ASR), Luna (TTS) and Diatheke (dialog) — a complete speech stack delivered as containerized software for on-prem and air-gapped deployments. The company has government, defense, and accessibility customers and is one of the few options for fully offline enterprise ASR with vendor support. Pricing is contract-based. Best fit: air-gapped, defense, finance, or accessibility deployments where the audio must never leave the customer network. Caveats: b2b sales only; pricing is per-deployment, not per-minute. Feature flags from vendor docs: speaker diarization, word-level timestamps, streaming, HIPAA-eligible under BAA. Directory tags: on-prem, voice-intel. Last vendor-page check: 2026-05-12.
Watch out for: B2B sales only; pricing is per-deployment, not per-minute.
Install / use
Contact Cobalt for Cubic container deploymentFeatures
| Speaker diarization | Yes |
| Word-level timestamps | Yes |
| Streaming / real-time | Yes |
| Languages supported | None |
| HIPAA eligible | Yes |
Cobalt Speech (Cubic / Diatheke) vs Whipscribe
| Feature | Cobalt Speech (Cubic / Diatheke) | Whipscribe |
|---|---|---|
| Category | Products | Transcription APIs |
| Pricing | Contact sales | free beta |
| Speaker diarization | Yes | Yes |
| Word timestamps | Yes | Yes |
| Streaming | Yes | No |
| Languages | — | 99 |
| Platforms | On-prem, API | Web, API, MCP |
Alternatives to Cobalt Speech (Cubic / Diatheke)
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.