AI Deployment Firms › AI platforms deployed by their own engineers
Sierra
Conversational AI agent platform for large enterprises' customer service and engagement, priced on outcomes.
Sierra sells a conversational AI platform that businesses use to build and run customer service and engagement agents. Its home page lists large enterprise customers such as Rocket Mortgage, SiriusXM, Singtel, SoftBank and Uber, with case study pages for several of them. It states that customers pay on outcomes rather than a fixed licence.
- Type of firm
- Platform with embedded engineers
- Known for
- Enterprise customer service AI agents with outcome pricing
- Based in
- San Francisco, United States
- Founded
- 2024
- Origin
- Started as an AI or data firm
- Funding
- Series B or later (Growth)
- Total raised
- $635M
- Ownership
- VC-backed
- Status
- Active
- Generalist or specialist
- Generalist
- Own product
- Yes: Sierra Agent Studio
- Pricing
- Outcome-based
- Founders
- Bret Taylor, Clay Bavor
- Website
- sierra.ai
Funding and deals
- 2026-05: Growth, $950 million, led by Tiger Global and GV (lead)
- 2025-12: Undisclosed, not disclosed, led by SoftBank Vision Fund 2
- 2025-09: Growth, $350M, led by Greenoaks Capital
- 2024-10: Series B, $175M, led by Greenoaks Capital
- 2024-02: Series A, $110M, led by Sequoia Capital and Benchmark
Investors
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