Sierra

San Francisco, California, United States

Sierra helps companies build and optimize conversational AI agents to improve customer experiences

Sierra, based in San Francisco, California, United States, has 14 investors on file, among them Coatue, Comcast Ventures and General Atlantic. Its latest round on record is Series C+, 4 May 2026, of 4 rounds. Its site was last checked 12 Nov 2026: site answers.

sierra.ai

Funding

4 rounds on record

Latest roundSeries C+4 May 2026

Since that round6 monthsno later round on record

Time between rounds3 monthson average, over 4 rounds

Investors in its rounds155 with a VCinfo profile

May 2026Series C+Led by Tiger Global Management, GV, Tiger Global

Mar 2026Series C+Led by LuminArx Capital Management, with General Atlantic, Coatue and 6 others

Sept 2025Series C+Led by Greenoaks Capital

Sept 2025Series BLed by Sequoia Capital, with 2 others

Round sizes and total raised are on Fundup AI, our sister product for funding data.

Investors

14 investors on file

Investor	Evidence	Type
Coatue	Portfolio page	Venture capital
Comcast Ventures	Portfolio page	Corporate VC
General Atlantic	Portfolio page	Venture capital
GV	Portfolio page	Venture capital
Kleiner Perkins	Portfolio page	Venture capital
Lightspeed Venture Partners	Portfolio page	Venture capital
Sandberg Bernthal Venture Partners	Portfolio page	Venture capital
Sequoia Capital	Page + round	Venture capital
Singtel Innov8	Portfolio page	Corporate VC
SoftBank Vision Fund	Portfolio page	Venture capital
SV Angel	Portfolio page	Venture capital
Tiger Global Management	Portfolio page	Venture capital
Traction Fund	Portfolio page	Venture capital
Westbound Equity Partners	Portfolio page	Venture capital

A company is shown only after its own site answers and carries its name. Sites are checked again on a schedule, because domains lapse and get bought. Round stages and dates come from Fundup AI; investor links come from portfolio pages and rounds; other facts name their source when you point at them. How we grade the data

At a glance

Latest round: Series C+, 4 May 2026
Investors on file: 14
Founded: 2023
Employees: 201-500
Headquarters: San Francisco, California, United States
Address: San Francisco, CA, United States
Open roles: 190
Site: Answers
Last checked: 12 Nov 2026

Company data by Fundup AI.

What Sierra runs on

Its vendors and tech stack, each with its source, are on StrataDB, our sister product.

See it on StrataDB

Backed by the same investors

Companies sharing two or more investors with Sierra.

Anthropic8 shared

Databricks6 shared

Harvey6 shared

DoorDash5 shared

Figma5 shared

OpenAI5 shared

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