United States · Series E startup
4 rounds we have observed, with the 11 investors named in them. Every figure came from a named source, and where the company reported a raise to the SEC itself, that is shown beside it.
Raised 6 months agoValuation: $10B, Mar 2026
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Funding summaryUpdated 5 Nov 2026
$1.5Braised across 4 rounds since 2024, from 8 sources
Each circle is a round, placed by date and sized by amount. The line above is the running total.
Reported by Crunchbase News and 3 othersSEC filing: $550M sold, first sale Mar 2026
Source recorded
Reported by TechCrunch and 1 otherSEC filing: $22M sold, first sale May 2020
Sierra filed 3 raises, $6.0M in all. Filings say how much was sold and to how many investors; they never name the investors.
From Sierra's own website: 4 on the team.
The busiest backers across the latest rounds. A filled square is a round they joined; a dark one, a round they led.
GreenoaksLL
Sequoia Capital
Thrive Capital
Google VenturesL
Tiger Global ManagementL
SV Angel
Benchmark
IQ Capital
Thrive Capital
Iconiq CapitalMissing a round, or an investor who was in one? Tell us.
These 9 firms list Sierra as a portfolio company on their own websites, but no report of a round names them. They are the firms' own claims, kept apart from the rounds above.
Sierra's investors include Greenoaks, Sequoia Capital, Thrive Capital, Google Ventures and Tiger Global Management, and 6 more on record. Google Ventures led its latest round.
Sierra has raised $1.5B across 4 rounds since 2024. One round did not disclose an amount, so the total is a floor.
Sierra's most recent round was a Series E of $950M in May 2026, led by Google Ventures.
Its most recent round, $950M in May 2026, is also its largest on record.
Sierra's first round on record, in Oct 2024, was backed by Greenoaks, Thrive Capital and ICONIQ Capital.
Sierra's latest named round is a Series E, in May 2026.
Sierra is based in the United States.
Greenoaks led the Undisclosed round in 2024; Google Ventures led the Series E in 2026.
In the same sector, and raised in the last eighteen months.
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United States · 
