This week / Companies / Sierra
AI workforce
Sierra
Conversational AI agents for customer experience, priced on resolved outcomes.
sierra.ai · LinkedIn · Data run November 13, 2026
Momentum, week of November 9, 2026
81 from 5 of 5 signals
- AI workforce: #2 of 17
Signal percentiles: Headcount change, 3 months 83; Web traffic change, 3 months 77; Tranco rank movement, ~30 days 85; Recency of last funding round 69; Launch and discussion activity, 90 days 93.
What the data says
Positive signals
- Headcount grew +45.4% over three months (as of Jul 30, 2026).
- Web traffic up 43.1% over three months (as of May 31, 2026).
- Tranco top-sites rank climbed 33.9% over about 30 days.
- Raised within the last 12 months: Series E, $950M (May 2026).
- 5 Hacker News stories linked to the company in 90 days.
Key facts
- Headquarters
- San Francisco, California, United Statessource
- Founded
- 2023source
- Last round
- Series E, $950M (May 2026)sourceas of round date May 4, 2026
- Headcount
- 893sourceas of Jul 30, 2026
- Headcount change
- 3m +45.4% · 12m +234%as of Jul 30, 2026
- Monthly web visits
- 326Ksourceas of May 31, 2026
- Web traffic change
- 3m +43.1% · 12m +111%as of May 31, 2026
- Tranco top-sites rank
- #109,969sourceas of Nov 12, 2026
- Tranco rank, ~30 days
- +33.9%as of 2026-10-15 to 2026-11-12
- LinkedIn followers
- 88Ksource
- Hacker News stories, 90 days
- 5source
Recent news and launches
- Oct 22, 2026 · Personal Agent Protocol (Hacker News (4 points)) · discussion
- Oct 10, 2026 · Sierra联合Meta等推出个人智能体协议PAP (donews.com)
- Oct 7, 2026 · Meta and Sierra Build Standard for How Personal Agents Interact With Businesses (PYMNTS.com)
- Oct 6, 2026 · Personal Agent Protocol (Hacker News (9 points)) · discussion
- Sep 23, 2026 · Liberty Global signs three-year strategic partnership with Sierra (legacy.thefly.com)
- Sep 9, 2026 · Hyper–bench: Evaluating agents that build agents (Hacker News (2 points)) · discussion
- Sep 1, 2026 · AI-pilling our company: lessons learned (Hacker News (1 points)) · discussion
- Sep 1, 2026 · Building Sierra's MCP Gateway: An engineering iceberg (Hacker News (2 points)) · discussion
n/a means our sources had no value; we do not estimate. Spot an error? Request a correction with a public source.