Sierra
- Founded
- 2023
- HQ
- 🇺🇸 United States
- Stage
- Series E
- Last round
- May 4, 2026
- Cadence
- 9 mo between raises
- Rev / employee
- $400K
How fast a company is breaking out right now — a 0–100 score across five weighted signals.
- Funding (30)Size, recency, and step-up of its rounds.28/30
- Hiring (25)Headcount growth and open-role velocity.22/25
- Backers (20)Quality of its lead investors.20/20
- Curation (15)How many top breakout lists feature it (5 pts each of 3).0/15
- Heat (10)News and social momentum.8/10
Independent breakout lists tracking this company · 0 of 3
Contributes 0/15 to the SR Momentum Score.
Every weekly pipeline run appends here · newest first.
- Jun 21, 2026NewsAdded to the Class of 2026 [Startup Riders]
- Jun 15, 2026MetricARR crossed $200M — added the second $100M in just two quarters [GetLatka]
- May 4, 2026FundingRaised $950M Series E at a $15.8B valuation, led by Tiger Global and GV [CNBC]
- Mar 25, 2026ProductLaunched Ghostwriter — an AI that builds AI agents from plain English [Sacra]
- Mar 1, 2026ExpansionAcquired Fragment (Paris AI-ops) and opened a Sydney office [Sacra]
Sources
FAQ
What is Sierra's ARR in 2026?
Sierra reached approximately $200M ARR in 2026 (verified 2026-06-21). Source: Startup Riders - Sierra Growth Playbook.
What is Sierra's valuation?
Sierra's most recent valuation is $16B, set at its Series E round on May 4, 2026.
How much has Sierra raised?
Sierra has raised $1.5B in total across Series E and prior rounds, with roughly 9 months between raises.
Is Sierra profitable?
Sierra runs at roughly $400K in revenue per employee across 500 staff, a strong efficiency signal. See the Updates feed on this page for sourced profitability disclosures.
Who are Sierra's investors?
Sierra's notable investors include Sequoia, Benchmark, Greenoaks. Full sourced funding history is in the Updates feed on this page.
Agent-ready · schema.org/Corporation · /sierra.json