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Snorkel AI

Redwood City, CA Artificial Intelligence Private

Snorkel AI is an enterprise AI company that provides data-centric AI infrastructure for programmatic data labeling. Founded by Stanford AI Lab alumni including Alex Ratner and Chris Ré, Snorkel develops Snorkel Flow, a platform that enables organizations to build, manage, and deploy AI models through weak supervision and programmatic labeling approaches. The platform accelerates AI development by allowing data science teams to write code to label data at scale, reducing the time and cost of traditional manual labeling.

Overview

Company data and valuation marks are estimates and may be incomplete, stale, erroneous, or revised.

Founded

2019

Employees

101–200

Total Funding

$250.3M

5 rounds

Latest Valuation

$1.3B

May 29, 2025

Funding

Total raised $250.3M across 5 rounds

Funding data and valuation marks are estimates and may be incomplete, stale, erroneous, or revised.

Last updated 06-25-2026

Latest Round

Type

Series D

Date

May 29, 2025

Amount

$100M

Valuation

$1.3B

Lead Investors

Addition
DateRoundAmount RaisedValuationLead Investors
May 29, 2025 Series D $100M $1.3B Addition
August 2021 Series C $85M $1B Addition
January 2021 Series B $35M Lightspeed Venture Partners

Funding by Round

Funding data and valuation marks are estimates and may be incomplete, stale, erroneous, or revised.

Valuation Trajectory

Valuation indexed to 1.0× at the selected entry round. Valuation marks are estimates and may contain errors. Hover each dot to compare.

If you invested at:
1x 2022 2023 2024 2025 Snorkel AI

Entry · Series C

$1B

Aug 2021

Snorkel AI today

$1.3B

May 2025 · latest mark

Snorkel AI multiple

1.3x

valuation uplift since first round

Y-axis is logarithmic. Hollow dots = estimated valuations. Does not represent realized investor returns.

Prominent Investors

Addition BlackRock Greyloack Google Ventures Lightspeed Venture Partners Walden Black Rock Greylock GV Nepenthe Capital

Leadership

  • Alex Ratner

    Co-founder and Chief Executive Officer

    LinkedIn
  • Chris Ré

    Co-founder and Advisor

  • Braden Hancock

    Co-founder and VP of Technology

  • Paroma Varma

    Co-founder and Head of Solutions

  • Henry Ehrenberg

    Co-founder and Head of Engineering

Competitors

Competitor list is illustrative and may be incomplete, stale, or erroneous.

  • Scale AI

    Data labeling and AI training platform providing infrastructure for building ML datasets

  • Label Studio

    Open-source and enterprise data labeling platform

  • Prodigy

    Active learning and annotation tool for NLP and ML data labeling

  • Labelbox

    Data labeling and model improvement platform for enterprise AI

  • Hume AI

    Emotional intelligence platform with data annotation capabilities

  • Aquant

    AI-powered data labeling and annotation automation

Snorkel AI Investment FAQ

Public status and buying access

No. Snorkel AI is a private company and does not have a public stock ticker or trade on a public stock exchange. Its shares are generally held by founders, employees, investors, and other private shareholders. Buyers and sellers may be able to transact in Snorkel AI shares through private secondary transactions, but any transaction depends on share availability, buyer and seller agreement, transfer restrictions, company approval rights, and any applicable right of first refusal. There is no guarantee that Snorkel AI will complete an IPO or other liquidity event.

Yes, it is sometimes possible to buy Snorkel AI shares pre-IPO through private secondary transactions. This depends on finding a willing seller, company approval, and satisfying any transfer restrictions or rights of first refusal.

Buyers interested in buying Snorkel AI shares on the secondary market typically do so through SetterVC and other secondary-market platforms, subject to eligibility requirements, share availability, transfer restrictions, and issuer approval. Buyers may need to satisfy sophistication, accreditation, institutional, platform, regulatory, or other eligibility requirements before participating. Once eligible, buyers may be able to view listings, make bids, and work with a licensed broker through the transaction process. Buyers should ensure they have appropriate legal and financial advisors guiding them before completing any transaction.

The company's latest round valuation was approximately $1.3B as of May 29, 2025. The latest round valuation is often used as one reference point in secondary-market pricing, but secondary prices may be above or below that valuation at any given time. Secondary pricing can shift significantly based on post-round conditions, such as changes in company performance, supply-demand dynamics, share class, transaction size, transfer restrictions, or broader market shifts. Any implied valuation from a past round should be confirmed with a broker or through live market listings before relying on it.

Valuation and funding

Snorkel AI was most recently valued at approximately $1.3B as of May 29, 2025. This is a private valuation and may differ from secondary pricing. Secondary shares may trade above or below this mark based on various factors. SetterVC and Setter Capital does not verify the accuracy of these valuations. Buyers and sellers should always confirm current valuations before completing any transaction.

Snorkel AI's valuation has changed over time based on funding rounds, tender offers, secondary-market indications, and other reported or collected valuation marks. Snorkel AI's valuation moved from approximately $1B as of August 2021 to approximately $1.3B as of May 29, 2025. This comparison reflects company-level valuation marks and does not represent realized investor returns. Secondary-market prices may differ from these valuations based on share class, transaction size, transfer restrictions, supply and demand, company performance, and broader market conditions. SetterVC and Setter Capital does not verify the accuracy or completeness of valuation data, and buyers and sellers should confirm current information before relying on it.

Snorkel AI's latest disclosed funding round was a Series D round in May 29, 2025. The round raised approximately $100M at an approximately $1.3B valuation, with Addition listed as disclosed lead or major investors. Primary funding rounds are different from secondary transactions: in a primary round, capital goes to the company, while in a secondary transaction, investors buy existing shares from current shareholders. Funding-round data reflects publicly reported or collected information and may be incomplete. The latest round valuation should be confirmed before it is used as a pricing reference.

Snorkel AI has raised approximately $250.3M in disclosed funding across 5 rounds. These figures reflect primary capital raised by the company and do not include every possible secondary transaction, undisclosed round, debt facility, or private transfer. Reported funding totals can change as new rounds are announced or older round details are corrected. Eligible users can use SetterVC to track Snorkel AI's funding history alongside private-market activity where available.

Snorkel AI's disclosed investors include Addition, BlackRock, Greyloack, Google Ventures, Lightspeed Venture Partners and Walden. Investor lists are based on public reporting, company announcements, and collected funding-round data, and may be incomplete. Participation in a prior funding round does not mean those investors are currently buying or selling shares. On SetterVC, eligible users can review Snorkel AI's funding history, valuation history, and private-market activity alongside other venture-backed companies.

Market context

Snorkel AI's most-cited competitors include Scale AI, Label Studio, Prodigy, Labelbox, Hume AI and Aquant. Investors often compare these companies by sector, product focus, valuation, funding raised, growth signals, investor base, and private-market activity.

Secondary-market demand for Snorkel AI shares can be affected by company performance, revenue growth, profitability, funding history, valuation, investor interest, sector momentum, public-market conditions, expected timing of a liquidity event, and the availability of shares for sale. Demand can also be affected by transfer restrictions, company approval rights, right of first refusal processes, limited information, and the price expectations of buyers and sellers. Strong demand does not guarantee strong pricing, liquidity, or investment returns. Weak demand does not necessarily reflect the company's long-term prospects. Demand signals should not be treated as a recommendation or prediction of investment performance. Buyers and sellers should treat demand signals as informational and conduct their own diligence before transacting.

Selling and transaction mechanics

Sellers often rely on intermediaries and platforms, such as SetterVC and other secondary-market platforms, to identify potential buyers. The exact process varies by company and transaction, but sellers often begin by confirming their ownership, desired price, transferability, and any company approval or notice requirements. If the seller agrees with a buyer on acceptable price and terms, the company may need to be notified through a share transfer notice or similar process. If a right of first refusal, company approval right, or other transfer restriction applies, the seller may need to wait until that process is completed. The parties may then execute a purchase and sale agreement, complete required transfer documentation, and close if all required conditions are satisfied. Sellers should always seek proper legal and financial advice before completing the transaction.

Yes, current and former Snorkel AI employees, early investors, and other existing shareholders may be able to sell vested shares before an IPO through a private secondary sale. This is not automatic; it depends on whether the shareholder has transferable shares, whether there is buyer demand, and whether the company's governing documents permit the transfer. Many companies require prior notice, company approval, or a right of first refusal before shares can be sold. Sellers should also seek proper legal and financial advice before proceeding.

A Snorkel AI secondary transaction usually involves an existing shareholder selling shares to a buyer before a public listing. The buyer and seller typically agree on price, number of shares, share class, and closing conditions. The seller may then need to notify Snorkel AI through a share transfer notice or similar process. If Snorkel AI or existing investors have approval rights, transfer restrictions, or a right of first refusal, those steps may need to be completed before the transfer can close. The parties typically enter into a purchase and sale agreement, complete any required transfer documentation, and close only if the necessary conditions are satisfied. Timing and certainty can vary by company and transaction.

In most private secondary transactions, parties commonly use a purchase and sale agreement that outlines price, terms, and conditions. They may also use share transfer documentation, often a stock transfer notice, share transfer notice, transfer instruction, or similar document, along with any required company approval or right of first refusal materials. Proof of ownership, such as a cap table entry, share certificate, brokerage statement, issuer confirmation, or administrator confirmation, may also be important. Buyers often request recent company financials, but private companies may limit disclosure. Since every deal varies, buyers and sellers should consult legal and financial advisors to understand which documents are needed.

Risk, diligence, and investor caution

Buying Snorkel AI shares pre-IPO is risky. Shares are illiquid, no IPO or liquidity event is guaranteed, valuations can change, transfers may require company approval, and private companies may provide limited financial disclosure. Be prepared for total loss. SetterVC and Setter Capital do not provide due diligence, legal, tax, accounting, valuation, or investment advice. Buyers must conduct their own due diligence, verify information, and seek independent legal and investment advice before proceeding.

Private secondary shares are typically illiquid. Unlike public stocks, there is no active public market, so selling them can be difficult and time-consuming. Sales depend on finding a willing buyer and often require company approval. Investors should be prepared to hold the shares for an extended period, with no guarantee of a future sale. Always assess your need for liquidity before investing.

SetterVC and Setter Capital do not provide due diligence, legal, tax, accounting, valuation, or investment advice. Buyers must conduct their own due diligence, including verifying ownership, transferability, legal structure, company approval, and assessing the company's prospects. SetterVC and Setter Capital do not provide advice on whether an investment is good, what price to pay, or what the best bid or ask is. SetterVC and Setter Capital may share documents in some circumstances, but it does not guarantee their accuracy or completeness. Due diligence is essential. Seek legal and investment advice as needed.

Before buying Snorkel AI shares, a buyer should try to review the share class, price per share, implied valuation, transfer restrictions, ROFR process, company approval rights, seller ownership evidence, recent financing or tender-offer information, available financial information, information rights, resale restrictions, tax considerations, and expected liquidity paths. Not all information may be available for a private company. Buyers should confirm available diligence, process details, and information needs with their own legal, tax, and investment advisers.

SPVs carry risks. Examples include the need to confirm the company allows SPV-based transfers, verify that the SPV truly owns the shares or interests it claims to own, and ensure it has not sold more interests than it holds. Due diligence is essential. Seek legal and investment advice as needed.

Forward contracts carry risks. Examples include the seller refusing to transfer the shares at the future date, even if the seller owns them, the seller going bankrupt with creditors claiming the shares, or the seller committing the same shares to multiple parties. Due diligence is essential. Seek legal and investment advice as needed.

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