Signal is a messaging app that prioritizes privacy and security. It was developed by Signal Messenger LLC, an American company founded in 2018 by Moxie Marlinspike and Brian Acton. Marlinspike, a renowned cryptographer, previously founded Whisper Systems, which was acquired by Twitter in 2011.

The company's headquarters is located in San Francisco, California. It serves as the central hub for Signal's development, operations, and business activities. The company's commitment to privacy and security is reflected in its open-source software, which allows users to independently assess the app's security measures and verify its code.

Signal's main product is its messaging app, available for both iOS and Android devices. The app offers end-to-end encryption of messages, voice and video calls, and the ability to send images and files securely. Signal also allows users to set timer-based self-destructing messages for increased privacy.

On a global scale, Signal has gained recognition as one of the most secure messaging apps available. It is often recommended by privacy advocates and experts. The company does not engage in targeted advertising, ensuring that user data is not collected for commercial purposes.

Signal has not announced any noteworthy subsidiaries, joint ventures, or partnerships. However, it has collaborated with organizations such as WhatsApp, which adopted Signal's encryption protocol for its messaging app. In terms of market position, Signal faces significant competition from other messaging apps such as WhatsApp, Telegram, and Facebook Messenger.

While it boasts a smaller user base compared to these giants, it has experienced substantial growth in recent years, fueled by the increasing concern over data privacy. Signal's notable achievements include being endorsed by high-profile figures such as Edward Snowden, who praised its robust privacy features. It has also received positive reviews from security experts for its commitment to encryption and transparency.

As of the latest update, Signal continues to see increasing adoption by users who prioritize privacy and security. The company regularly updates its app to enhance features and address any vulnerabilities. With its steadfast dedication to privacy, Signal remains a leading choice for individuals seeking a secure messaging platform