Sierra

San Francisco, United States

Sierra helps businesses to build and deploy AI agents that communicate with users across channels such as chat, voice, email, and messaging.

$350.0M raised

May 2026

Series E

Top Investors

Sequoia CapitalThrive CapitalSV AngelBenchmarkGreenoaks

19,000+ verified contacts

Emails, phones & LinkedIn profiles

How much funding has Sierra raised?

Sierra has raised $350.0M in total funding. The most recent round was Series E. The last funding was announced in May 2026.

Who are Sierra's investors?

Sierra's investors include Sequoia Capital, Thrive Capital, SV Angel, Benchmark, Greenoaks.

Where is Sierra headquartered?

Sierra is headquartered in San Francisco, United States.

What does Sierra do?

Sierra helps businesses to build and deploy AI agents that communicate with users across channels such as chat, voice, email, and messaging.

What stage is Sierra at?

Sierra is at the Series E stage.

Cite this page

Free to use in articles, research, and reference works. Stable URL — will not change. Data on this page last updated May 4, 2026.

MLA

"Sierra — Funding & Investors." VCBacked, May 4, 2026, https://www.vcbacked.co/company/sierra. Accessed June 3, 2026.

APA

VCBacked. (2026). Sierra — Funding & Investors. Retrieved June 3, 2026, from https://www.vcbacked.co/company/sierra

Wikipedia (cite web)

{{cite web |title=Sierra — Funding & Investors |url=https://www.vcbacked.co/company/sierra |website=VCBacked |access-date=June 3, 2026}}

Profile data sourced and verified per the VCBacked methodology. Last funding round dated May 4, 2026.