Sierra
Conversational-AI platform for consumer brands.
Conversational-AI platform for consumer brands.
Best for consumer brands wanting voice and chat AI agents that handle customer conversations end-to-end. Pricing: contact sales.
What it is
Sierra is a conversational-AI platform founded by former Salesforce co-CEO Bret Taylor and former Google AI lead Clay Bavor. The product builds custom AI agents for consumer brands that handle customer-service conversations across voice and chat with on-brand tone and complex workflow handling. Sierra raised at a $4.5B valuation in 2024 with backing from Sequoia, Benchmark, and Greenoaks and counts SiriusXM, WeightWatchers, and Sonos among early customers. Pricing is enterprise contract; deployment is bespoke per customer. Pricing and product details listed here were last reviewed by Neugence on 2026-05-12; check the vendor site for current values before quoting.
Watch out for: Enterprise sales motion; deployments are bespoke.
Install / use
sierra.ai — Contact salesFeatures
| Speaker diarization | No |
| Word-level timestamps | No |
| Streaming / real-time | No |
| Languages supported | None |
| HIPAA eligible | No |
Sierra vs Whipscribe
| Feature | Sierra | Whipscribe |
|---|---|---|
| Category | Products | Transcription APIs |
| Pricing | contact sales | free beta |
| Speaker diarization | — | Yes |
| Word timestamps | — | Yes |
| Streaming | — | No |
| Languages | — | 99 |
| Platforms | Web | Web, API, MCP |
Alternatives to Sierra
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