Fundraising Fox

weblink

Unicorn · $15.8B

San Francisco, US · Founded 2023 · 15 known investors

sierra.ai

Sierra helps businesses build better, more human customer experiences using AI. The company partners with industry leaders to transform customer experiences and deliver measurable business impact at scale.

Also known as Sierra · Sierra AI · Sierra Technologies, Inc.

AI & Machine LearningEnterprise SoftwareSaaS

Founders & leadership

weblink was founded in 2023 by Bret Taylor and Clay Bavor.

BTBret Taylor
Bret Taylorin𝕏Co-FounderHe serves as chairman of the board at OpenAI and previously spent seven years at Salesforce, where he was co-CEO, president and COO, and president and chief product officer after the company acquired Quip, which he led as CEO. He also sat on Twitter's board from 2016 to 2022, serving as chairman in his final year.
CBClay Bavor
Clay Bavorin𝕏Co-FounderHe spent nearly two decades at Google, joining as an associate product manager in 2005 and going on to lead product management, the AR/VR division, and later Labs, where he oversaw projects including Project Starline and Area 120.

Investors · 15

Funding

SEC filings, press & company announcements

$1.6B disclosed across 4 of 5 rounds · 2024–2026

Source: company announcements and press reports — follow each round's link for the claim.

Valuation · disclosed

Disclosed events
$10Bvaluation at Series CSep 2025
filing ↗
$4.5Bvaluation at Series BOct 2024
filing ↗
$1Bvaluation at Launch / SeedFeb 2024
filing ↗

Source: SEC prospectus filings, and round valuations the company or its investors disclosed — follow each entry's link for the claim.

Key figures

latest reported
Annual recurring revenueMay 2026$150M
Enterprise annual recurring revenue (on track to top)Sep 2025$100M
HeadcountAug 2026989
HeadcountAug 2026789 employees
Languages supported by omnichannel AI agentsAug 202659 languages
Models powering product portfolioMay 202615 models
Number of institutional investorsAug 202612 investors
Post-money valuationMay 2026$15.8B
Total disclosed fundingMay 2026$1.6B
Total fundingOct 2024$285M

Company-reported or press-reported figures, each dated to when it was claimed — not independently audited.

7 people who came through Sierra went on to found or lead other companies.

Competitors · 5

by search overlap

Companies competing with weblink for the same Google search keywords, organic and paid, via search-intersection analysis.

Timeline · 6

launches, deals, and filings
Jul 2026
Sierra acquires Takeoff

Sierra acquired Takeoff and said the combined teams would build Horizon, a platform for long-horizon AI agents.

source ↗

Jul 2026
Strategic partnership with SoftBank for Japan distribution

Sierra and SoftBank announced a partnership making SoftBank the exclusive sales channel in Japan for Sierra's conversational AI platform.

source ↗

May 2026
$950 million Series E at $15 billion valuation

Round led by Alphabet's GV and Tiger Global, joined by Benchmark, Sequoia, Greenoaks and others; aggregator lists a $15.8 billion post-money valuation.

$950M source ↗

Sep 2025
$350 million round at $10 billion valuation

Company confirmed it was raising $350 million, with Greenoaks Capital expected to lead.

$350M source ↗

Oct 2024
$175 million round at $4.5 billion valuation

Round led by Greenoaks Capital with participation from Thrive Capital and ICONIQ, bringing total funding to $285 million.

$175M source ↗

Feb 2024
Sierra launches conversational AI platform for businesses

Company came out of stealth with a pitch for a conversational AI platform for businesses, alongside a $110 million seed/launch round.

source ↗

Dated company events from announcements, filings, and press; legal rows summarize public dockets and regulator releases.

Legal entities · 1

corporate structure
SIERRA TECHNOLOGIESMinnesota

In the news

Research sources · 12

primary sources listed

12 public sources were cited for this profile; the first-party ones are listed here.

Frequently asked questions

What does weblink do?
Sierra helps businesses build better, more human customer experiences using AI. The company partners with industry leaders to transform customer experiences and deliver measurable business impact at scale.
Who founded weblink?
weblink was founded by Bret Taylor, Clay Bavor in 2023.
Who are weblink's investors?
weblink's investors include Comcast Ventures, Conviction, Everybody Ventures, ICONIQ, Kleiner Perkins, Mech Ventures, Sequoia Capital, SoftBank Vision Fund and 7 more.
How much funding has weblink raised?
weblink has disclosed $1.6B raised across 4 of its 5 known rounds.
Where is weblink headquartered?
weblink is headquartered in San Francisco, US.