# Sierra funding: rounds and investors > Sierra has raised $1.5B across 4 rounds since 2024. Investors include Greenoaks, Sequoia Capital and Thrive Capital. Every round with its source. Source: https://millionrounds.com/company/sierra (Millionrounds; every figure on the page links to its filing or article) United States · [Series E startup](https://millionrounds.com/companies) # Who invested in *Sierra* 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. AI Customer Experience Enterprise Software Raised 6 months ago Valuation: $10B, Mar 2026 Follow Sierra and see its new rounds in your feed. [Start following](https://millionrounds.com/login?join=1&why=follow&next=%2Fcompany%2Fsierra) Funding summary Updated 5 Nov 2026 **$1.5B** raised across 4 rounds since 2024, from 8 sources **$175M** Round **$350M** Round **$950M** Series E - **Latest round:** Series E, $950M May 2026 - **Led by:** Google Ventures and Tiger Global Management - **Step-up i:** 2.7× - **Investors:** 11 (3 led) See who backed them ## The funding story Each circle is a round, placed by date and sized by amount. The line above is the running total. 2025 2026 **$175M** Round **$350M** Round **?** Venture **$950M** Series E - **First round:** Round, $175M - **Biggest round:** $950M - **Usual gap between rounds:** 5 months ## The rounds - **May 2026** Series E **$950M** *3 new* *3 returning* [Google Ventures](https://millionrounds.com/fund/gv) Lead [Tiger Global Management](https://millionrounds.com/fund/tiger-global-management) Lead [Sequoia Capital](https://millionrounds.com/fund/sequoia-capital) [Benchmark](https://millionrounds.com/fund/benchmark) [Thrive Capital](https://millionrounds.com/fund/thrive-capital-2) [Greenoaks](https://millionrounds.com/fund/greenoaks) Reported by Crunchbase News and 3 others SEC filing: $550M sold, first sale Mar 2026 - **Dec 2025** Venture **Amount undisclosed** *5 new* [Sequoia Capital](https://millionrounds.com/fund/sequoia-capital) [SV Angel](https://millionrounds.com/fund/sv-angel) [Thrive Capital](https://millionrounds.com/fund/thrive-capital-2) [IQ Capital](https://millionrounds.com/fund/iq-capital) [Iconiq Capital](https://millionrounds.com/fund/iconiq-capital-3) Source recorded - **Sept 2025** Round **$350M** *1 returning* [Greenoaks](https://millionrounds.com/fund/greenoaks) Lead Reported by TechCrunch SEC filing: $3.6M sold, first sale Jul 2025 - **Oct 2024** Round **$175M** *3 new* [Greenoaks](https://millionrounds.com/fund/greenoaks) Lead [Thrive Capital](https://millionrounds.com/fund/thrive-capital) [ICONIQ Capital](https://millionrounds.com/fund/iconiq-capital) Reported by TechCrunch and 1 other SEC filing: $22M sold, first sale May 2020 ## Funding filed with regulators Sierra filed 3 raises, $6.0M in all. Filings say how much was sold and to how many investors; they never name the investors. - May 2025 **$4.2M** 2 investors SEC Form D - Aug 2021 **$1.4M** 9 investors debt SEC Form D - Apr 2021 **$342K** 6 investors debt SEC Form D ## Founders and team From Sierra's own website: 4 on the team. - **Caryn Seidman-Becker** Chief Executive Officer - **Moshe Pridan** Chief Product Officer - **Sarah Wallis** Chief Operating Officer - **Alex McGillis** VP, Product Management ## Who was in which round The busiest backers across the latest rounds. A filled square is a round they joined; a dark one, a round they led. **Round** 2024 **Round** 2025 **Venture** 2025 **Series E** 2026 [Greenoaks](https://millionrounds.com/fund/greenoaks) L L [Sequoia Capital](https://millionrounds.com/fund/sequoia-capital) [Thrive Capital](https://millionrounds.com/fund/thrive-capital-2) [Google Ventures](https://millionrounds.com/fund/gv) L [Tiger Global Management](https://millionrounds.com/fund/tiger-global-management) L [SV Angel](https://millionrounds.com/fund/sv-angel) [Benchmark](https://millionrounds.com/fund/benchmark) [IQ Capital](https://millionrounds.com/fund/iq-capital) [Thrive Capital](https://millionrounds.com/fund/thrive-capital) [Iconiq Capital](https://millionrounds.com/fund/iconiq-capital-3) ## Everyone who backed them [Greenoaks](https://millionrounds.com/fund/greenoaks) VC firm **3** rounds, led 2 [Sequoia Capital](https://millionrounds.com/fund/sequoia-capital) VC firm **2** rounds [Thrive Capital](https://millionrounds.com/fund/thrive-capital-2) Family office **2** rounds [Google Ventures](https://millionrounds.com/fund/gv) Corporate VC **1** round, led 1 [Tiger Global Management](https://millionrounds.com/fund/tiger-global-management) VC firm **1** round, led 1 [SV Angel](https://millionrounds.com/fund/sv-angel) VC firm **1** round [Benchmark](https://millionrounds.com/fund/benchmark) VC firm **1** round [IQ Capital](https://millionrounds.com/fund/iq-capital) VC firm **1** round [Thrive Capital](https://millionrounds.com/fund/thrive-capital) Accelerator **1** round [Iconiq Capital](https://millionrounds.com/fund/iconiq-capital-3) Growth equity **1** round [ICONIQ Capital](https://millionrounds.com/fund/iconiq-capital) Family office **1** round Missing a round, or an investor who was in one? [Tell us](https://millionrounds.com/corrections?slug=sierra). ## Also claim to have backed them 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. [Comcast Ventures](https://millionrounds.com/fund/comcast-ventures) Corporate VC Per its own site [Singtel Innov8](https://millionrounds.com/fund/singtel-innov8) Corporate VC Per its own site [Conviction](https://millionrounds.com/fund/conviction-4) VC firm Per its own site [Westbound Equity Partners](https://millionrounds.com/fund/westbound-equity-partners) VC firm Per its own site [M.G. Siegler](https://millionrounds.com/fund/m-g-siegler) VC firm Per its own site [1105](https://millionrounds.com/fund/1105) Venture studio Per its own site [Everybody Ventures](https://millionrounds.com/fund/everybody-ventures) VC firm Per its own site [Mech Ventures](https://millionrounds.com/fund/mech-ventures) VC firm Per its own site [RR2 CAPITAL](https://millionrounds.com/fund/rr2-capital) VC firm Per its own site ## Quick answers about Sierra ### Who invested in Sierra? 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. ### How much has Sierra raised? Sierra has raised $1.5B across 4 rounds since 2024. One round did not disclose an amount, so the total is a floor. ### When did Sierra last raise? Sierra's most recent round was a Series E of $950M in May 2026, led by Google Ventures. ### What was Sierra's biggest round? Its most recent round, $950M in May 2026, is also its largest on record. ### Who backed Sierra first? Sierra's first round on record, in Oct 2024, was backed by Greenoaks, Thrive Capital and ICONIQ Capital. ### What stage is Sierra at? Sierra's latest named round is a Series E, in May 2026. ### Where is Sierra based? Sierra is based in the United States. ### Who led Sierra's rounds? Greenoaks led the Undisclosed round in 2024; Google Ventures led the Series E in 2026. ## Companies like Sierra In the same sector, and raised in the last eighteen months. [**Laza Medical** $160M · Nov 2026](https://millionrounds.com/company/laza-medical)[**Nooks** $543M · Nov 2026](https://millionrounds.com/company/nooks)[**Journify** $12M · Nov 2026](https://millionrounds.com/company/journify)[**Agrani Labs** $123M · Nov 2026](https://millionrounds.com/company/agrani-labs)[**e2e** $8.0M · Nov 2026](https://millionrounds.com/company/e2e)[**Guava** $13M · Nov 2026](https://millionrounds.com/company/guava) ## Find investors like these Search every investor by what they have actually funded, then narrow to your stage and market. Free. Open the investor searchOr these rounds in the app