Tor Project
Tor Project is a US 501(c)(3) nonprofit that develops free, open-source anonymity and censorship-circumvention software, including Tor Browser, Tor VPN, Arti, Snowflake, and OONI, serving privacy-conscious individuals, journalists, activists, and users in censored regions worldwide.
- Company typePrivate
- Founded2006
- HeadquartersCambridge, United States
- Headcount1–10
- GTM typeB2C
- OfferingSoftware
What Tor Project does
Tor Project, Inc. is a US 501(c)(3) nonprofit organization founded in 2006 (with onion routing research originating in the late 1990s at the US Naval Research Lab) that develops and maintains free, open-source anonymity and privacy software. Its core offering is Tor Browser — a Firefox-based browser available on Windows, macOS, Linux, and Android — that routes user traffic through a volunteer-operated overlay network of relays using multi-layered encryption to provide anonymity, censorship circumvention, and tracker/fingerprinting resistance. The portfolio also includes Tor VPN for Android, Arti (a Rust-based reimplementation of the Tor client), Snowflake and BridgeDB (anti-censorship transports), OONI (a censorship-measurement research tool), and Onion Browser for iOS. Co-founders Roger Dingledine and Nick Mathewson remain active, and the organization is led by Executive Director Isabela Bagueros.
The technology stack centers on onion routing — traffic is encrypted three times and passed through three relays — and is being modernized through Counter Galois Onion (CGO) wide-block encryption (launched November 2025), the Arti Rust client, and seizure-resistant RAM-only relay servers (in development with Osservatorio Nessuno, 2026). The Tor network relies on thousands of volunteer-run relays worldwide, and Tor's anti-fingerprinting technology is licensed into downstream products including Mullvad Browser (co-developed with Mullvad VPN).
Tor has no paying end-user customers and distributes its software free of charge via direct download, Google Play Store, and F-Droid. Revenue (in the form of grants and donations) comes from a diversified base of institutional funders including the US Department of State's Bureau of Democracy, Human Rights, and Labor, the Open Technology Fund, Ford Foundation, Sida, Heising-Simons Foundation, Craig Newmark Philanthropies, Zcash Community Grants, the Ethereum Foundation, OpenSats, and #StartSmall, supplemented by individual donations (including through the PrivChat event series) and a 2026 Web3/quadratic-funding campaign with Funding the Commons. The user base spans privacy-conscious consumers, journalists and whistleblowers, human-rights activists, and populations in censored regions such as Iran, Russia, and China.
Tor Project firmographics
Firmographics- Name
- Tor Project
- Legal name
- The Tor Project, Inc.
- Website
- https://torproject.org
- Company type
- Private
- Founded year
- 2006
- Operating status
- Operating
- Headcount range
- 1–10 employees
- Short description
- Tor Project is a US 501(c)(3) nonprofit that develops free, open-source anonymity and censorship-circumvention software, including Tor Browser, Tor VPN, Arti, Snowflake, and OONI, serving privacy-conscious individuals, journalists, activists, and users in censored regions worldwide.
- Ownership category
- akta.pro rank
Tor Project industry classification
Industry- Product category
- Privacy & Anonymity Software
- NAICS
- Software Publishers (5132), Security Systems Services (except Locksmiths) (561621)
- SIC
- Services-Computer Programming Services (7371)
- akta.pro primary industry
- Browser & Web Isolation Security (HDADAEAK)
- akta.pro secondary industries
- Network Security Services (Firewall/VPN/ZTNA/SASE Integration) (BPAEAEAG), VPN Gateways & Concentrators (IPsec/SSL) (HDAFAFAC)
Keywords
Where Tor Project is headquartered
LocationHeadquarters
- HQ city
- Cambridge
- HQ country
- United States
- HQ region
- North America
Offices1 record
Markets served
Tor Project business model
Business model- GTM type
- B2C
- Offering type
- Software
- Cost components
- Technology or R&D, Personnel, Operations, Infrastructure, Marketing or Sales, Others
Revenue model
- Donations from individuals: Individual donors contribute monthly or one-time donations to support Tor's operations. The PrivChat event series is used as a fundraising mechanism.
- Institutional grants and funding: Tor receives grants from foundations and government agencies including Open Technology Fund, U.S. Department of State, Ford Foundation, Heising-Simons Foundation, Sida, and others. This represents the primary funding model for the nonprofit.
- Web3/Cryptocurrency crowdfunding: Tor Project launched a Web3 crowdfunding campaign in partnership with Funding the Commons, accepting crypto contributions in Bitcoin, Ethereum, Zcash, Monero, and Golem, with matching pools from partners.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Freemium | Others | Free tier - Tor Browser |
Go-to-market motion1 record
Distribution channels4 records
Marketing channels8 records
Tor Project product offering
Product offeringCore offering
The Tor Project develops and distributes free, open-source anonymity and privacy software, centered on Tor Browser — a privacy-hardened Mozilla Firefox derivative that routes traffic through a volunteer-run onion-routing network with three-layer encryption. The portfolio also includes Tor VPN for Android, the Arti Rust-based Tor client, Snowflake and BridgeDB censorship-circumvention tools, the OONI censorship-measurement platform, and collaborative products such as Mullvad Browser. All offerings are free of charge and source-available, with no commercial subscription tiers.
Product overview
The Tor Project develops a suite of free and open-source privacy and anonymity technologies centered around the Tor network and Tor Browser. The core offering is Tor Browser, available for Windows, macOS, Linux, and Android, which routes traffic through the Tor network using multi-layered encryption to protect user privacy and bypass censorship. Tor VPN extends this protection to all device applications. The project also includes Arti (a modern Rust-based Tor implementation), Snowflake and BridgeDB (anti-censorship tools), and OONI (censorship measurement research). Through collaboration, Tor's anti-fingerprinting technology powers Mullvad Browser, while Onion Browser brings Tor routing to iOS users. The ecosystem is supported by the Tor Expert Bundle for developers integrating Tor into applications.
Differentiator
Problem solved
Functional benefit
Brands
- Tor Browser: The organization's flagship private web browser that routes traffic through the Tor network for anonymity and censorship circumvention, available for desktop (Windows, macOS, Linux) and Android.
- Arti
- Tor VPN
- OONI
Products and services
- Tor Browser A free, open-source web browser based on Mozilla Firefox that routes internet traffic through the Tor network to provide anonymity, censorship circumvention, protection against third-party trackers and ads, anti-fingerprinting, automatic cookie and browsing-history clearing, and per-website isolation. Available on Windows, macOS, Linux, Android, and (via Onion Browser) iOS.
- Tor VPN A free VPN application for Android that routes a device's traffic through the Tor network, providing per-app routing and local-only session statistics for users who want Tor-level protection across all their apps.
- Onion Browser An open-source iOS browser that routes traffic through the Tor network, allowing iPhone and iPad users to access .onion services and browse anonymously. Distributed via Apple's App Store and developed by a contributor working closely with the Tor Project.
- Tor Expert Bundle A free download package containing the Tor daemon along with pluggable transports, bridge strings, and geoip data. Used by developers who need to integrate Tor routing into their own applications.
- Arti A modern implementation of the Tor client written in Rust, designed to replace the legacy C codebase and make Tor more reliable, more secure, and easier for third-party developers to embed into their own applications.
- OONI (Open Observatory of Network Interference) A free software project maintained by the Tor Project that measures internet censorship, traffic manipulation, and connectivity issues around the world. Used by researchers, journalists, and advocates to detect and document network interference.
- Mullvad Browser A free privacy-focused web browser developed by Swedish VPN provider Mullvad in collaboration with the Tor Project, built on Firefox with Tor's anti-fingerprinting technology and default privacy settings.
- Snowflake A standalone censorship-circumvention pluggable transport tool hosted at snowflake.torproject.org that lets users in heavily censored regions reach the Tor network by leveraging temporary volunteer-run browser-based proxies.
- BridgeDB A standalone bridge distribution system that supplies Tor bridge addresses to users who cannot connect to the Tor network directly because their network blocks direct Tor access.
Quantifiable outcome
- Usage surge from 7.5 million to 25 million users during Iran protests (January 2026)
- +1 more outcomes
Companies that use Tor Project
Customer profileNamed customers4 records
Segments3 records
Ideal customer profiles3 records
Tor Project technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature7 records
Tor Project partnerships and signals
Strategic signalPartnerships
Four partnerships are on record, tiered core and minor.
- Funding the CommonscoreTor Project and Funding the Commons launched a Web3 crowdfunding campaign to support 10 nonprofit projects working on privacy, censorship circumvention, and digital infrastructure.
- FastlycoreFastly's global edge cloud platform hosts Tor Browser update downloads that can be fetched anonymously, providing critical infrastructure support.
- Mullvad VPNcoreMullvad collaborated with Tor Project to develop Mullvad Browser, built on Firefox with Tor's anti-fingerprinting protections. Mullvad provides ongoing financial support.
- Osservatorio NessunominorItalian digital rights non-profit leading the development of stateless, RAM-only relay servers for Tor that wipe data on reboot to protect against hardware seizures.
Scale indicators4 records
Recent moves6 records
Expansion highlights6 records
Tor Project competitors and assessment
Company assessmentBroad incumbents
- Mozilla (Firefox): Underlying engine of Tor Browser and partner in Tor's anti-fingerprinting work. Mozilla is a broad incumbent whose Firefox product competes for privacy-conscious users and supplies core technology Tor depends on.
- Brave: Privacy-focused web browser with built-in tracker blocking, fingerprinting resistance, and a VPN. Competes with Tor Browser for the same privacy-conscious consumer segment and ships its own ad-supported crypto model.
- ExpressVPN: Major commercial VPN provider targeting privacy and censorship-circumvention users globally. Competes with Tor VPN for mainstream users who want an easier-to-use alternative to Tor Browser.
Direct peers
- Proton: Swiss privacy company offering ProtonVPN, Proton Mail, and related encrypted tools. Directly comparable to Tor in target customer (privacy and human-rights users) and core value proposition (anonymity/encryption), with a more commercial, freemium business model.
- Mullvad VPN: Swedish commercial VPN provider and direct collaborator with Tor Project on Mullvad Browser. Mullvad is the closest privacy-tool peer: same target user (privacy-conscious, censorship-affected users), overlapping anti-fingerprinting technology, and a mutual partnership with Tor.
- DuckDuckGo: Privacy-focused search engine and browser offering tracker blocking and anti-fingerprinting. Targets the same mainstream privacy-conscious user as Tor Browser and is listed as a corporate sponsor of Tor Project.
- Signal: End-to-end encrypted messaging app serving the same journalists/activists/human rights defender segment that Tor targets. Comparable privacy-first nonprofit funding model and overlapping user base.
- Psiphon: Anti-censorship tool widely used in Iran, China, and other censored regions. Directly comparable to Tor/Snowflake on the circumvention use case and overlapping user base of censored-region users.
Emerging players
- I2P (Invisible Internet Project): Open-source anonymous network similar in architecture to Tor's onion routing. Competes for technically sophisticated users seeking anonymity but with a smaller relay footprint and developer community.
Others
- Tails: Privacy-focused live operating system (and Tor Project subsidiary per the source data) that routes all traffic through Tor. Treated as a peer/adjacent for completeness given its product overlap and operational linkage to Tor.
Market position
Strengths5 records
Weaknesses4 records
Competitive moat5 records
Key risks6 records
Key highlights6 records
Customer concentration
Tor Project social profiles
Digital presenceTor Project financial estimates
Financial estimateRevenue estimate
Valuation estimate
Tor Project leadership team
Management profileNumber of profiles
Profiles13 records
Tor Project subsidiaries and ownership
Company hierarchySubsidiaries2 records
Tor Project funding detail
Funding detailFunding overview
Funding rounds3 records
Investors1 record
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Tor Project M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Tor Project
What does Tor Project do?
The Tor Project develops and distributes free, open-source anonymity and privacy software, centered on Tor Browser — a privacy-hardened Mozilla Firefox derivative that routes traffic through a volunteer-run onion-routing network with three-layer encryption. The portfolio also includes Tor VPN for Android, the Arti Rust-based Tor client, Snowflake and BridgeDB censorship-circumvention tools, the OONI censorship-measurement platform, and collaborative products such as Mullvad Browser. All offerings are free of charge and source-available, with no commercial subscription tiers.
Is Tor Project a public or private company?
Tor Project is a private company. It is classified as nonprofit foundation owned and is currently operating.
When was Tor Project founded?
Tor Project was founded in 2006. It employs 1 to 10 people.
Where is Tor Project based?
Tor Project is headquartered in Cambridge, United States, in the North America region.
How does Tor Project make money?
Three revenue lines are on record. Donations from individuals are the primary driver. The others are institutional grants and funding and web3/Cryptocurrency crowdfunding.
Who are Tor Project's main competitors?
Broad incumbents on record are Mozilla (Firefox), Brave and ExpressVPN. Direct peers are Proton, Mullvad VPN, DuckDuckGo, Signal and Psiphon. I2P (Invisible Internet Project) is listed as an emerging player. Tails is listed as an others.
Does Tor Project have an API?
No public API is recorded for Tor Project.
What industry is Tor Project in?
Tor Project's product category is Privacy & Anonymity Software. Its primary akta.pro industry code is HDADAEAK, Browser & Web Isolation Security, with a secondary code of BPAEAEAG, Network Security Services (Firewall/VPN/ZTNA/SASE Integration). Its NAICS code is 5132 and its SIC code is 7371.