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Tidelift

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Makes open source software work better—for everyone

Boston, United StatesFounded 2017Other B2B Software
Valuation $100–500M Latest valuation · 2022
Revenue $1–10M Latest reported FY
Headcount <100 Current team size
Total funding $50–100M Disclosed equity funding
Unlock exact values This page shows ranges. Dealroom has the exact numbers for Tidelift and the history behind them.

About Tidelift

Tidelift operates as a managed open source subscription service, providing enterprises with a streamlined approach to handling the complexities of open source software. The company was founded in 2017 by Donald Fischer, Havoc Pennington, Jeremy Katz, and Luis Villa, a team with extensive backgrounds in open source from organizations like Red Hat, the Wikimedia Foundation, and the Mozilla Foundation. This collective experience shaped Tidelift's core mission: to create a viable economic model for open source maintenance, ensuring the software that underpins countless applications remains secure and reliable.

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The business model is centered on a subscription service sold to enterprise clients. These clients pay a recurring fee, which grants them access to a curated catalog of vetted open source components. This catalog provides assurances around security, licensing, and maintenance, directly addressing major pain points for organizations that rely heavily on open source. A significant portion of this subscription revenue, with a commitment of at least 50%, is then paid out to the independent developers and maintainers of these open source projects. Payments to these 'lifters' are determined by factors like subscriber usage and the strategic importance of their packages, creating a direct financial incentive for them to adhere to secure development practices.

The Tidelift Subscription offers a suite of tools that allow development teams to manage their software supply chain effectively. Key features include the ability to create customizable catalogs of approved components, monitor for security vulnerabilities and licensing issues, and receive recommendations for package updates. The platform integrates with a client's existing systems, analyzing their software bills of materials (SBOMs) to track dependencies and report on compliance and violations. This provides organizations with continuously updated data and attestations needed for compliance with standards like the NIST Secure Software Development Framework. Tidelift serves a diverse clientele, including prominent names like Cisco, Fannie Mae, and the U.S. Air Force. In late 2024, it was announced that Sonar had signed a definitive agreement to acquire Tidelift, with plans to extend its code quality and security coverage to open source libraries.

Source: Dealroom company data

At a glance

Status
Acquired
Founded
2017
Headquarters
Boston, United States
Employees
11
Open positions
None listed
Dealroom signal
73.1/100
Industry
Enterprise Software
Sector
Other B2B Software, Information Technology, Open Source, SaaS, Platform
Business model
SaaS
Client focus
b2b

Latest news

Press, funding announcements and product moves mentioning Tidelift.

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Funding history

5 recorded events

Company financing events and reported valuations.

Deal typeDateAmountValuationInvestorsSource
ACQUISITIONOther financing Dec 2024 $0 Sonar
SERIES COther financing Sep 2022 $6.5M $135M General Catalyst · Foundry · Dorilton Capital · Kaiser Permanente
Showing the latest 2 of 5 recorded eventsBook a demo for the full funding history →

Financials

Revenue over time

Revenue, earnings and other financial measures where available. Years marked “E” are estimates.

YearRevenueGrowth
2026
2025
2024
2023
2022
2021
2020
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Growth signals

Tidelift website traffic

Latest recorded traffic for Tidelift is 5.7K monthly website visits, up 1.8% over the last three months. Tidelift's team declined 8.3% over the past year.

Latest monthly visits5.7K 3-month web change+1.8% 1-year team growth-8.3%
Summary metrics are public; monthly history is available with a demoCompare with peers →

Investors

8 investors on the cap table

From Dealroom's funding and investor records, grouped by the round each investor first entered.

Series A2 investors entered at this stage

Series B and later5 investors entered at this stage

  • Dorilton Capital
  • Atlassian Ventures
  • Kaiser Permanente
  • Cisco Investments
  • AEI HorizonX

Other known investors1 additional known investor

  • Sonar
Team profiled 10 named & role-tagged
Founders Hidden — book a demo/100 quality score
Key operators 3 quality Hidden — book a demo/100
Potential founders Hidden — book a demo likely future founders
Startup mafia Hidden — book a demo alumni-founded startups
Talent movements Hidden — book a demo in · Hidden — book a demo out past 12 months

Source: Dealroom Talent Intelligence.

Global footprint

Workforce and web traffic by country
Workforce by country
3 countries with
team presence
🇺🇸 United States71.4%
🇧🇩 Bangladesh14.3%
🇬🇧 United Kingdom14.3%
3 countries shown

Market sentiment

Posts on X, past 7 days

An AI-synthesised read of the highest-engagement posts about Tidelift on X, ranked by likes and reposts, corporate channels excluded.

Reading the room on X — pulling top posts and synthesizing themes…

Source: X recent search ranked by engagement (likes + retweets) · Synthesis by Claude · Cached for 1 hour

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