Mozilla

What Mozilla does

Mozilla is a non-profit-backed technology company founded in 1998, operating today through Mozilla Corporation (the for-profit subsidiary) under Mozilla Foundation (the US non-profit parent). Its flagship product is the Firefox web browser, built on the independent Gecko rendering engine — one of only two major engines not controlled by Google (Blink) or Apple (WebKit) — and available across Windows, macOS, Linux, Android, and iOS in 90+ languages. The company extends this browser-centric platform into a portfolio of privacy products: Mozilla VPN (standalone WireGuard-based subscription plus a free integrated tier inside the browser), Firefox Relay (email and phone masking), Mozilla Monitor (data breach scanning), Firefox Focus (mobile privacy browser), and MDN Plus (developer reference subscription). Beyond consumer software, Mozilla operates Thunderbird (open-source email client via MZLA Technologies), the Solo AI website builder, the 0DIN GenAI vulnerability platform, the Tabstack web automation API, and Thunderbolt (open-source enterprise AI client). The Anonym division provides privacy-preserving advertising technology built on differential privacy and trusted execution environments, and Mozilla.ai and Mozilla Ventures round out the AI and investment portfolio.

Mozilla's revenue is dominated by the Google default-search royalty agreement, reported at over $400 million annually and acknowledged by leadership as the majority of total revenue. Subscription revenue comes from Mozilla VPN ($4.99/month annual or $9.99/month monthly), Firefox Relay premium, MDN Plus, and emerging Thunderbird Pro services. Mozilla Advertising reaches 210M+ monthly active Firefox users and 16.2M MDN users with privacy-preserving placements sold via direct sales. Mozilla Foundation fundraising (donations) supports non-profit advocacy, education, and innovation programs. Distribution is primarily direct-to-consumer via website downloads and app stores (Apple, Google, Microsoft, Linux package managers), with Mozilla Anonym adding a B2B sales motion.

Technology investment centers on Rust integration (zlib-rs, adblock-rust, multi-threaded CSS engine), AI-powered features (Shake to Summarize via Mistral Small 3.1, on-device iOS AI via Apple Intelligence, AI kill switch for user control), and security automation through Anthropic's Claude Mythos Preview AI under Project Glasswing, which identified 271 vulnerabilities in Firefox 150. The Mozilla.ai subsidiary and the Mozilla Data Collective crowdsourced AI data platform extend this into open-source AI tooling and community-centered training data.

Name

Mozilla

Legal name

Mozilla Corporation

Website

https://mozilla.org

Company type

Private

Founded year

1998

Operating status

Operating

Headcount range

1,001–5,000 employees

Short description

Mozilla is a non-profit-backed technology company founded in 1998, best known for the Firefox browser built on its independent Gecko engine. It serves 210M+ monthly active users across consumer privacy products (VPN, Relay, Monitor), developer tools (MDN, Tabstack), and the Mozilla.ai and Anonym advertising divisions.

Ownership category

akta.pro rank

Product category

Web Browsers

NAICS

Software Publishers (51321), Security Systems Services (56162)

akta.pro primary industry

Web Application Security (WAF, RASP) (HDADACAA)

Keywords

• Web browser software
• VPN subscription services
• Privacy protection software
• Email client software
• Developer documentation platform

Headquarters

HQ city

Mountain View

HQ country

United States

HQ region

North America

Offices15 records

Markets served

GTM type

B2C

Offering type

Software

Cost components

Personnel, Technology or R&D, Infrastructure, Operations, Marketing or Sales, Others

Revenue model

1. Search engine royalty revenue (Google default search deal): Mozilla receives the majority of its revenue from Google, reportedly over $400 million annually, to remain Firefox's default search engine.
2. Mozilla VPN subscriptions: Recurring paid subscription for standalone Mozilla VPN service across Windows, macOS, Linux, iOS, Android; $4.99/month annual or $9.99/month monthly; plus a free integrated VPN inside Firefox browser.
3. Firefox Relay premium subscriptions: Paid tier for email masking service offering custom subdomains, anonymous replies, and expanded masking; free tier expanded from 5 to 50 disposable emails.
4. MDN Plus subscriptions: Paid developer resource subscriptions (collections, notifications, playgrounds) supporting MDN Web Docs.
5. Mozilla Advertising / Anonym privacy-preserving ad tech: Brand-safe advertising on Firefox and MDN Web Docs reaching 210M+ monthly active Firefox users; Anonym provides privacy-preserving targeting, optimization, and measurement using differential privacy and trusted execution environments.
6. Thunderbird / Thundermail / Thunderbird Pro services: Premium email and productivity services under Thunderbird Pro including Thundermail.
7. Donations to Mozilla Foundation: Non-profit funding via donations supporting advocacy, education, funding, and innovation initiatives.

Pricing tiers

Go-to-market motion1 record

Distribution channels7 records

Core offering

Mozilla develops and distributes the Firefox web browser (powered by the independent Gecko rendering engine) across desktop, Android, and iOS, complemented by a portfolio of privacy-focused products: Mozilla VPN (WireGuard-based, 500+ servers in 30+ countries), Firefox Relay (email masking), Mozilla Monitor (data breach monitoring), Thunderbird email client, and MDN Plus developer subscriptions. The company also operates AI products (Thunderbolt, Solo, 0DIN, Tabstack) and the Anonym privacy-preserving advertising division acquired in June 2024. Mozilla Foundation backs community initiatives including Mozilla Data Collective and Mozilla Ventures.

Product overview

Mozilla operates a portfolio-plus-platform architecture built around its core Firefox browser (available on desktop, Android, and iOS) and the Gecko rendering engine. The Firefox browser serves as the primary user-facing surface, with companion products extending privacy and security: Mozilla VPN provides standalone encrypted internet access via WireGuard, Mozilla Monitor scans for data breaches, Firefox Relay masks email addresses and phone numbers, and Firefox Focus offers a dedicated mobile privacy browsing experience. Developer-oriented offerings include MDN Plus and the Tabstack web automation API. Beyond the consumer portfolio, Mozilla runs the Thunderbird email client, the Solo AI website builder, the 0DIN GenAI vulnerability scanning service, and the Anonym privacy-preserving advertising division (acquired June 2024). Enterprise and AI offerings include the Thunderbolt AI client (via MZLA Technologies) and Mozilla.ai. Mozilla Foundation backs the Mozilla Data Collective community data platform and Mozilla Ventures invests in mission-aligned startups. All products tie together under a non-profit-backed mission to keep the internet open and privacy-respecting.

Differentiator

Problem solved

Functional benefit

Brands

• Firefox: Flagship web browser offering Enhanced Tracking Protection with 2000+ trackers blocked automatically; available on desktop, Android, and iOS.
• Firefox Focus
• Firefox Relay
• Mozilla Monitor
• Mozilla VPN
• MDN Plus
• Thunderbird
• Solo
• 0DIN
• Tabstack
• Anonym

Products and services

• Firefox Mozilla's flagship web browser offering built-in Enhanced Tracking Protection that automatically blocks 2000+ data trackers, available across Windows, macOS, Linux, Android, and iOS in 90+ languages. Includes the Gecko engine and an integrated free VPN (in supported regions) for browser traffic privacy.
• Firefox Focus Dedicated privacy browser for mobile with automatic tracking protection and ad blocking, designed for users wanting a focused, ephemeral browsing experience with one-tap data erasure.
• Firefox Relay Email and phone number masking service that protects users' real contact information. Free tier includes 50 disposable email addresses; paid tiers add custom subdomains, anonymous replies, and expanded masking.
• Mozilla Monitor Data breach monitoring service that scans for leaked credit card information, phone numbers, and other personal data; sends instant notifications of new breaches and offers automated removal of exposed information from data broker sites.
• Mozilla VPN Standalone premium VPN service using the WireGuard protocol, offering up to 5 connected devices, access to 500+ servers in 30+ countries, multi-hop routing, custom DNS support, ad/tracker blocking, malware protection, and whole-device encryption. Audited by Cure53 with no-logging policy.
• MDN Plus Subscription tier for MDN Web Docs (Mozilla Developer Network) providing developers with curated content collections, notifications, and playgrounds to support web development learning and reference.
• Thunderbird Open-source email, calendar, and contacts application operated by MZLA Technologies (a Mozilla subsidiary), offering unified inbox management with filtering and organization capabilities.
• Solo AI-powered service that lets users instantly create a website and grow their business, with free custom domain connection and hosting capabilities.
• 0DIN AI security service that connects users' AI systems to a global community of security experts who uncover and help fix GenAI vulnerabilities before attackers can exploit them.
• Tabstack Developer-focused API and automation product that connects apps to the web with reliable automation, turning live web pages into clean, structured results for downstream applications.
• Thunderbolt AI client Open-source AI client by MZLA Technologies (a Mozilla subsidiary) designed for enterprise self-hosted deployment on private infrastructure, integrating with DeepSet's Haystack platform, Model Context Protocol servers, and Agent Client Protocol agents for chat, search, and research across internal AI models.

Quantifiable outcome

• Enhanced Tracking Protection reduces unique user identification by ~14% on average and 49% on macOS
• +5 more outcomes

Named customers4 records

Ideal customer profiles4 records

Technology focussed Yes

API detail

Has API

Yes

API docs

API detail

Core technology

AI maturity

App detail

Integration6 records

AI capability5 records

Feature12 records

Partnerships

18 partnerships are on record, tiered core, minor and flagship.

• Cloudflare (PACT Protocol)coreTechnology or Integration · 1 June 2026Cloudflare, Mozilla, Google, Microsoft, and Shopify jointly developed Private Access Control Tokens (PACT), a new protocol designed to replace CAPTCHAs using anonymous tokens to verify human users. The initiative responds to bots now accounting for 58% of global web traffic. Cloudflare CEO Matthew Prince is leading the standardization effort. The group plans to submit PACT for W3C standardization.
• Google Chrome (PACT Protocol)coreTechnology or Integration · 1 June 2026Google Chrome is co-developing Private Access Control Tokens (PACT) with Mozilla Firefox, Microsoft Edge, Cloudflare, and Shopify to enable anonymous personhood verification without visual CAPTCHAs. The three browsers (Chrome, Firefox, Edge) combined hold approximately 77% market share, ensuring the protocol reaches the majority of internet users.
• Microsoft Edge (PACT Protocol)coreTechnology or Integration · 1 June 2026Microsoft Edge is co-developing the PACT (Private Access Control Tokens) protocol with Mozilla, Google, Cloudflare, and Shopify. The protocol aims to replace CAPTCHAs and address the milestone where bot traffic has officially surpassed human HTTP requests.
• Adafruit (Web Serial API collaboration)minorStrategic or Co-development Partner · 1 May 2026Mozilla released Firefox 151 with Web Serial API support on desktop in collaboration with Adafruit, whose browser-based hardware workflows including WebSerial ESPTool now work natively in Firefox. The feature brings Firefox closer to feature parity with Chromium-based browsers for hardware/embedded development communities.
• Anthropic (Project Glasswing)flagshipStrategic or Co-development Partner · 1 April 2026Mozilla is one of approximately 40-50 partner organizations with access to Anthropic's restricted Claude Mythos Preview AI model through Project Glasswing. The collaboration enabled Mozilla to identify 271 critical security vulnerabilities in Firefox 150 (vs 22 with prior Opus 4.6), contributing to 423 total bug fixes in April 2026. Anthropic restricted Mythos from public release due to safety concerns; Mozilla engineers paired the AI model with a custom harness for source-code reasoning.
• Brave Software (adblock-rust engine)coreTechnology or Integration · 1 March 2026Mozilla quietly integrated Brave's adblock-rust engine into Firefox 149 through a prototype project led by Mozilla engineer Benjamin VanderSloot, vendoring the engine via Rust tooling and integrating it via ContentClassifierService with C++ wrappers. Waterfox has also adopted the same engine. The engine was overhauled in January with FlatBuffers reducing memory usage by 75%.
• Anonym (acquired by Mozilla)flagshipStrategic or Co-development Partner · 1 June 2024Mozilla acquired Anonym in June 2024 to integrate its privacy-preserving advertising technology. Anonym uses differential privacy algorithms and trusted execution environments to protect user data while enabling targeted advertising. Anonym is now part of Mozilla Corporation with Brad Smallwood as Chief Business Officer and Jesse Goranson leading sales.
• Fakespot (acquired by Mozilla)minorStrategic or Co-development Partner · 1 May 2023Mozilla acquired Fakespot, a startup that helps users identify fake or unreliable reviews through a website and browser extension. Mozilla planned to incorporate Fakespot features into Firefox to enhance the shopping experience for Firefox users. Fakespot was later scheduled for shutdown in mid-2025 as part of Mozilla's product reallocation.
• Pulse (acquired by Mozilla)coreStrategic or Co-development Partner · 1 December 2022Mozilla acquired Pulse, a team specialized in machine learning, to develop new approaches focused on ethical AI and personalized user experiences in products including Pocket. Pulse was co-founded by Raj Singh (now VP of Product at Mozilla, leading new 0 to 1 product initiatives).
• Active Replica (acquired by Mozilla)minorStrategic or Co-development Partner · 1 December 2022Mozilla completed the acquisition of Active Replica, a US-based virtual spaces startup, to enhance the Hubs platform. Active Replica specializes in virtual event packages, venue design, and live entertainment — used to support Mozilla's metaverse strategy.
• Mila (open-source sovereign AI research)coreStrategic or Co-development PartnerMozilla and Mila announced a strategic research partnership focused on open-source sovereign AI. Partnership was announced via Mozilla's blog and referenced on the Mozilla homepage.
• Mullvad VPN (network infrastructure)coreTechnology or IntegrationMozilla VPN is powered by Mullvad's network infrastructure using WireGuard protocol. The Mozilla VPN features page links to mullvad.net for server list and WireGuard documentation, indicating a deep technical partnership for VPN backend services.
• Waterfox (industry coordination on adblock)minorOthersWaterfox adopted the same Brave adblock-rust engine for its 2026 release, signaling a broader industry shift toward native ad-blocking capabilities parallel to Mozilla's Firefox 149 integration.
• GitHub, Google, Amazon, Microsoft, Pinterest (DMCA amicus)minorGTM or Marketing PartnerGitHub, Google, Amazon, Microsoft, Mozilla, and Pinterest jointly filed an industry amicus brief supporting service provider liability protections in the Cox v. Sony U.S. Supreme Court ruling (March 2026), which established that service providers cannot be held liable for user copyright infringement without evidence of intent to contribute.
• Coalition for App Fairness (Epic Games, DuckDuckGo, Proton)coreGTM or Marketing PartnerMozilla, Epic Games, DuckDuckGo, and Proton signed an open letter coordinated by the Coalition for App Fairness urging the UK government and CMA to robustly enforce the Digital Markets, Competition and Consumers Act against Apple and Google, warning that sluggish regulatory enforcement is allowing dominant platforms to entrench monopolies over mobile browsers, search engines, and app stores.
• Open Rights Group, EFF, Tor Project, Proton, Mullvad, ExpressVPN, Tuta, Internet Society (UK open web coalition)coreGTM or Marketing PartnerMozilla joined 19 organizations including Proton, Tor, Mullvad, ExpressVPN, and EFF in an open letter published May 5 urging the UK government not to undermine the open web as the Children's Wellbeing and Schools Act became law. The coalition warns against VPN bans and mass identity verification for ordinary internet users.
• Global Encryption Coalition (Center for Democracy & Technology)minorGTM or Marketing PartnerMozilla is part of the Global Encryption Coalition including the Center for Democracy & Technology, which urged Meta to reverse its decision to discontinue end-to-end encrypted messaging on Instagram, arguing low adoption is a reason to make encryption the default rather than remove it.
• Proton VPN, Surfshark, NordVPN, Windscribe (UK VPN policy advocacy)minorGTM or Marketing PartnerMozilla joined Proton VPN, Surfshark, NordVPN, and Windscribe in raising concerns about UK proposals to age-restrict VPNs, arguing such restrictions would undermine privacy architecture and fail to effectively protect children.

Scale indicators15 records

Recent moves7 records

Expansion highlights8 records

Broad incumbents

• Google Chrome: Dominant cross-platform browser (Chromium/Blink engine) and Mozilla's largest direct competitor. Co-develops PACT and pays Mozilla >$400M annually as Firefox's default search engine — making Chrome both the chief rival and the largest single source of Mozilla revenue.
• Apple Safari: Major browser with WebKit engine, the default on iOS/macOS. Shares Mozilla's regulatory vulnerability to DMA enforcement and is a Mozilla partner through Apple Intelligence integrations in Firefox for iOS; competing platform for the privacy-conscious user.
• Microsoft Edge: Chromium-based browser tightly bundled with Windows and Copilot AI. Co-develops the PACT protocol with Mozilla and shares the ~77% combined browser share covered by PACT, but is a primary competitor for AI-feature mindshare and default placement on Windows.

Direct peers

• Brave: Privacy-first Chromium-based browser with built-in ad-blocking, VPN, and a privacy-preserving ad network (Brave Ads). Mozilla adopted Brave's adblock-rust engine in Firefox 149, signaling tight technical alignment on user-side blocking and ad-tech strategy.
• DuckDuckGo: Privacy-focused browser, search engine, and email-protection service (Duck Addresses). Competes directly with Firefox Relay's email masking and with Firefox's tracker-blocking positioning; Firefox Relay's 10x free-tier expansion explicitly targeted DuckDuckGo's offering.
• Opera: Alternative browser with built-in VPN, ad-blocker, and AI features (Aria). Targets the same privacy-conscious and feature-seeking niche as Firefox and offers comparable bundling of browser + VPN; relevant comparable for product strategy and market positioning.
• Proton (Proton AG): Privacy-focused suite spanning VPN, email (Proton Mail), calendar, and now a privacy browser (Proton Browser). Direct overlap with Mozilla VPN, Firefox Relay, Thunderbird, and Firefox on a privacy-first subscription bundle; co-signed Mozilla's UK regulatory open letters.

Others

• Mullvad VPN: WireGuard-based VPN provider whose network infrastructure powers Mozilla VPN. A direct privacy-VPN comparable and a co-signatory on Mozilla's UK open-web coalition letters; useful comparable for VPN unit economics and audit posture.

Emerging players

• Vivaldi Technologies: Chromium-based power-user browser with built-in mail, calendar, RSS, and VPN-like features. Smaller but directly comparable in targeting power users and offering bundled privacy/productivity tools alongside the browser.
• The Browser Company (Arc): Developer of the Arc and Dia browsers, focused on AI-native browsing experiences and productivity-first UX. Relevant comparable for Mozilla's Project Nova redesign and AI-control investments targeting differentiated, design-forward users.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• GitHubgithub.com/mozilla/bedrock
• YouTubeyoutube.com/user/firefoxchannel
• Facebookfacebook.com/mozilla
• LinkedInlinkedin.com/company/mozilla-corporation
• Instagraminstagram.com/mozilla
• Xx.com/mozilla

Compliance4 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles20 records

Subsidiaries7 records

Funding overview

Funding rounds2 records

Investors1 record

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A5 records

Investments24 records

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Mozilla