Sierra revenue and valuation
Specter estimates Sierra's annual revenue at $330M to $480M and its valuation at $14.3B to $19.4B. The company last reported $400M ARR in October 2026 and was priced at $15.8B in May 2026.
- Estimated revenue
- $330M–$480M
- Estimated valuation
- $14.3B–$19.4B
- Reported ARR
- $400M
- Total funding
- $1.58B
- Founded
- 2023
- Headquarters
- San Francisco, United States
- Employees
- 1,155
Sierra revenue
Sierra grew from $100M ARR in November 2025 to $400M in October 2026. Specter's model puts current ARR between $330M and $480M, anchored to four reported figures.
Monthly data
| Month | Specter estimate | Low | High | Reported ARR |
|---|---|---|---|---|
| $400M | $330M | $480M | $400M | |
| $350M | $240M | $510M | ||
| $300M | $230M | $400M | ||
| $260M | $210M | $330M | ||
| $230M | $185M | $280M | ||
| $200M | $98M | $300M | $200M | |
| $182M | $146M | $230M | ||
| $165M | $136M | $200M | ||
| $150M | $125M | $180M | $150M | |
| $131M | $104M | $165M | ||
| $114M | $93M | $141M | ||
| $100M | $83M | $120M | $100M | |
| $72M | $35M | $109M | ||
| $70M | $36M | $105M | ||
| $34M | $18M | $50M | ||
| $31M | $12M | $50M | ||
| $34M | $14M | $54M | ||
| $30M | $13M | $46M | ||
| $28M | $12M | $44M | ||
| $26M | $14M | $38M | ||
| $26M | $12M | $40M | ||
| $22M | $10M | $35M | ||
| $20M | $8.4M | $32M | ||
| $18M | $7.7M | $29M | ||
| $15M | $6.5M | $23M | ||
| $12M | $5.8M | $18M | ||
| $13M | $3.2M | $22M | ||
| $7.3M | $3.9M | $11M | ||
| $6M | $3.2M | $9M |
| Date | Reported ARR | Source |
|---|---|---|
| $400M | ||
| $200M | ||
| $150M | ||
| $100M |
Sierra valuation
Sierra's valuation rose from $1B at its venture round in February 2024 to $15.8B at its Series E in May 2026. Specter's live estimate sits between $14.3B and $19.4B.
Monthly data
| Month | Specter estimate | Low | High | Reported valuation |
|---|---|---|---|---|
| $16.7B | $14.3B | $19.4B | ||
| $15.6B | $12.3B | $19.7B | ||
| $15.8B | $12.5B | $20B | ||
| $16B | $13B | $19.7B | ||
| $15.8B | $13.1B | $19B | $15.8B (press) | |
| $15.8B | $13.1B | $19B | $15.8B (round) | |
| $14.1B | $10.8B | $18.4B | ||
| $12.6B | $9.93B | $15.9B | ||
| $11.2B | $9.11B | $13.8B | ||
| $10B | $8.32B | $12B | $10B (press) | |
| $10B | $8.32B | $12B | $10B (press) | |
| $10B | $8.32B | $12B | $10B (press) | |
| $10B | $8.2B | $12.2B | ||
| $10B | $8.32B | $12B | $10B (round) | |
| $10B | $8.28B | $12.1B | ||
| $10B | $8.29B | $12.1B | ||
| $10B | $8.32B | $12B | $10B (press) | |
| $8.92B | $7.05B | $11.3B | ||
| $7.96B | $6.35B | $9.98B | ||
| $7.1B | $5.69B | $8.86B | ||
| $6.34B | $5.13B | $7.83B | ||
| $5.65B | $4.55B | $7.02B | ||
| $5.04B | $4.13B | $6.16B | ||
| $4.5B | $3.74B | $5.41B | $4.5B (press) | |
| $4.5B | $3.74B | $5.41B | $4.5B (round) | |
| $3.73B | $2.59B | $5.36B | ||
| $3.09B | $2.22B | $4.31B | ||
| $2.56B | $1.99B | $3.29B | ||
| $2.12B | $1.63B | $2.77B |
Sierra funding rounds
| Date | Round | Raised | Post-money valuation | Lead investors |
|---|---|---|---|---|
| Series E | $950M | $15.8B | Tiger Global Management, Google Ventures | |
| Venture round | Undisclosed | Undisclosed | SoftBank Vision Fund | |
| Venture round | $350M | $10B | Greenoaks | |
| Venture round | $175M | $4.5B | Greenoaks | |
| Venture round | $110M | $1B | Sequoia Capital, Benchmark |
Sierra competitors
Enterprise conversational AI splits between high-level autonomous reasoning and infrastructure-heavy voice automation.
| Company | Revenue | Valuation |
|---|---|---|
| $330M–$480M | $14.3B–$19.4B | |
| $290M–$430M | $260M–$1.48B | |
| $37M–$139M | $600M–$1.06B | |
| $250M–$1.15B | $940M–$4.44B | |
| $51M–$66M | $4.26B–$6.63B |
Sierra revenue and valuation FAQ
What is Sierra's revenue?
Specter estimates Sierra's annual recurring revenue at $330M to $480M as of October 2026. Sierra last reported $400M ARR in October 2026, up from $100M in November 2025.
What is Sierra's valuation?
Sierra's latest post-money valuation is $15.8B, from a May 2026 Series E. Specter's live estimate is $14.3B to $19.4B.
What is Sierra's revenue multiple?
Sierra is valued at about 39.5× ARR, based on its $15.8B May 2026 valuation and $400M last reported ARR. That works out to roughly $346K of ARR per employee.
How much funding has Sierra raised?
$1.58B across five rounds, from a $110M venture round in February 2024 to a $950M Series E in May 2026.
Who invested in Sierra?
10 investors, including Benchmark, Google Ventures, Greenoaks, Sequoia Capital, SoftBank Vision Fund and Tiger Global Management.
Who are Sierra's competitors?
Fin (Previously Intercom), PolyAI, [24]7.ai and Decagon. Specter ranks 28 competitors for Sierra.