Signal Foundation

What Signal Foundation does

Signal Foundation is a US 501c3 nonprofit organization established in February 2018 to support Signal Messenger, an end-to-end encrypted messaging application originally created by Moxie Marlinspike in 2012. The Foundation was capitalized with a $50 million personal investment from WhatsApp co-founder Brian Acton and is governed by a board that includes Brian Acton, Meredith Whittaker (President), Jay Sullivan, Katherine Maher, and Amba Kak, with Moxie Marlinspike serving as Founder (Emeritus). Its mission is to protect free expression and enable secure global communication through open source privacy technology.

Signal Messenger is the Foundation's flagship product: a free, cross-platform end-to-end encrypted messaging application available on Android, iOS, Windows, Mac, and Linux, with a localized interface in more than 40 languages. The application's cryptographic layer is built on the Signal Protocol, which has not been broken in the product's history and which has been adopted by other major messaging services including WhatsApp, Google Messages, Skype, and Facebook Messenger's Secret Conversations. The Foundation operates with no advertisers, no investors, and no paid product tiers, and is sustained entirely by donations from users. Revenue mechanics are donation-only; there is no subscription, advertising, or in-app purchase model, and there are no disclosed enterprise contracts.

The Foundation distributes Signal Messenger through self-serve downloads from signal.org, Google Play, and the Apple App Store, and grows primarily through word-of-mouth, open source community engagement, and earned media generated by high-profile privacy incidents — most notably the 2025 SignalGate episode, which produced the app's largest US download surge, and the April 2026 phishing attack against approximately 300 German user accounts, in which Signal's encryption itself was not compromised. The Foundation has taken an explicit public stance against encryption backdoors, opposing the EU Chat Control regulation, the UK's Online Safety Act, and Canada's Bill C-22, and has stated it will exit those markets rather than weaken its encryption architecture. Customer segments are horizontal and consumer-led, including privacy-conscious individuals, general global consumers, and government officials and politicians, with no paid enterprise tier or anchor account structure.

Name

Signal Foundation

Legal name

Signal Technology Foundation

Website

https://signalfoundation.org

Company type

Private

Founded year

2018

Operating status

Operating

Headcount range

11–50 employees

Short description

Signal Foundation is a US 501c3 nonprofit that operates Signal Messenger, a free, open source end-to-end encrypted messaging app used by hundreds of millions globally. Founded in 2018 with $50M from Brian Acton, it is sustained entirely by user donations with no advertisers or investors.

Ownership category

akta.pro rank

Product category

Secure Messaging Software

NAICS

Wired and Wireless Telecommunications (except Satellite) (5171)

SIC

Communications Services, Nec (4899)

akta.pro primary industry

Secure/Encrypted Messaging (BPAMACAG)

Keywords

• Encrypted messaging software
• Privacy communication platform
• Open source encryption
• Nonprofit technology organization
• Secure messaging services

Headquarters

HQ city

Mountain View

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2C

Offering type

Software

Cost components

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

Revenue model

1. Donations and User Contributions: Signal is a nonprofit with no advertisers or investors, sustained only by people who use and value it. The organization relies on community donations to provide Signal Messenger as a free app to millions worldwide.

Pricing tiers

Go-to-market motion1 record

Distribution channels3 records

Marketing channels5 records

Core offering

Signal Foundation operates Signal Messenger, a free end-to-end encrypted messaging application available on Android, iPhone/iPad, Windows, Mac, and Linux. The nonprofit develops and maintains the Signal Protocol, encryption architecture, infrastructure, and open source app code, ensuring user data remains inaccessible to anyone including Signal itself. The organization is sustained entirely by community donations, with no advertisers, investors, or paid tiers.

Product overview

Signal Foundation operates Signal Messenger as its single flagship product — an end-to-end encrypted messaging application focused on privacy. The organization is structured as a 501c3 nonprofit without advertisers or investors, supporting Signal's development and ongoing operations since its founding in 2018 to support the app that originated in 2012.

Differentiator

Problem solved

Functional benefit

Brands

• Signal Messenger: The flagship end-to-end encrypted messaging application developed by Signal Foundation.

Products and services

• Signal Messenger End-to-end encrypted messaging application for individuals worldwide, available free on Android, iPhone/iPad, Windows, Mac, and Linux. Protects user privacy by ensuring data stays out of anyone's hands including Signal's own, with no advertisers or investors. Offers secure private messaging, voice calls, file sharing, and group communications.

Quantifiable outcome

• Signal reached its biggest US download surge following SignalGate in 2025, with ongoing global growth across Europe, South America, and South Asia driven by privacy concerns.
• +1 more outcomes

Named customers3 records

Segments3 records

Ideal customer profiles2 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature3 records

Scale indicators3 records

Recent moves8 records

Expansion highlights5 records

Direct peers

• Wire: Wire is an end-to-end encrypted messaging and collaboration platform used by governments and enterprises. It targets a similar secure-communications need as Signal, particularly for organizational and high-security use cases.
• Wickr (Amazon): Wickr (acquired by Amazon in 2021) provides end-to-end encrypted messaging with self-destructing messages, targeting enterprises and government/security teams. It is a direct competitor to Signal in the secure-messaging category.
• WhatsApp: WhatsApp is the world's most-used messaging app and directly competes with Signal Messenger on private messaging. Notably, WhatsApp itself uses the Signal Protocol for its end-to-end encryption — the technology co-developed by Signal's founders.
• Element (Matrix): Element is the commercial steward of the open-source Matrix protocol, offering end-to-end encrypted messaging with a federated architecture. It overlaps directly with Signal on open-source, privacy-first messaging for consumers, governments, and enterprises.
• Telegram: Telegram is a global messaging platform with hundreds of millions of users and a strong focus on privacy and security, including Secret Chats. It competes head-to-head with Signal for privacy-conscious consumers and political/activist user segments.
• Threema: Threema is a Switzerland-based end-to-end encrypted messaging app that emphasizes privacy, anonymity, and data sovereignty. It is a direct peer targeting the same privacy-conscious consumer and European government/enterprise segments.
• Apple iMessage: iMessage is Apple's end-to-end encrypted messaging service built into iOS, macOS, and watchOS. It is a primary direct competitor for Signal among consumers in the Apple ecosystem, offering comparable end-to-end encryption with deep platform integration.

Emerging players

• Session: Session is an open-source, privacy-focused messaging app that routes messages through an onion network without requiring phone numbers. It targets the same privacy-conscious segment as Signal but with a smaller user base and more niche positioning.
• Viber: Viber is a global messaging app offering end-to-end encrypted chats and calls. It competes with Signal in the broader consumer messaging market, particularly in Eastern Europe, Asia, and emerging markets.
• Keybase (Zoom): Keybase, acquired by Zoom, offered end-to-end encrypted messaging and file sharing with a focus on cryptographic identity. It overlaps with Signal's secure-messaging proposition for tech-savvy users.

Market position

Strengths5 records

Weaknesses4 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xtwitter.com/signalapp
• GitHubgithub.com/signalapp
• Instagraminstagram.com/signal_app

Revenue estimate

Valuation estimate

Number of profiles

Profiles6 records

Subsidiaries1 record

Funding overview

Funding rounds2 records

Investors

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M&A

Investments

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

Frequently asked questions about Signal Foundation