Is Signal free, and how is it funded?

Signal is free for everyone, and it is funded by grants and donations rather than ads, trackers, or a paid tier. On signal.org, the organization describes itself as an independent nonprofit that is not tied to any major tech companies and can never be acquired by one. If you are deciding whether to use Signal or wondering who pays for it, the short answer is: you can use it at no cost, and the money comes from people and organizations that choose to support it.

What "free" means on signal.org

The site states plainly that Signal is free for everyone. It also says there are no ads, no affiliate marketers, and no creepy tracking. That combination matters because it rules out the usual ways a free messaging app might pay for itself.

According to the site, Signal also lets you share text, voice messages, photos, videos, GIFs, and files for free, using your phone's data connection so you can avoid SMS and MMS fees. Voice and video calls are described as free as well, with no long-distance charges. So the "free" claim covers both the app itself and the communication features it offers.

How Signal is funded

The funding model is stated directly on the homepage:

• Signal is an independent nonprofit.
• It is not tied to any major tech companies.
• It can never be acquired by one.
• Development is supported by grants and donations from people like you.

That last point is the practical answer to "how is it funded." There is no advertising revenue and no corporate parent underwriting it. Instead, the site points to a Donate option and asks users to contribute. The footer identifies Signal as a 501c3 nonprofit, which is the U.S. tax category for charitable organizations.

Why the nonprofit structure is part of the pitch

The site frames the funding model as inseparable from the privacy promise. It says the encryption keeps conversations secure, that Signal cannot read your messages or listen to your calls, and that "privacy isn't an optional mode — it's just the way that Signal works." A nonprofit funded by donations has no ad business that would benefit from scanning or profiling users, which is the logic behind presenting "No ads. No trackers. No kidding." alongside the donation request.

What this means if you are deciding whether to use it

If your concern is cost, Signal is free to download and use, with no paid tier mentioned on the page. If your concern is who is behind it, the site's answer is a nonprofit supported by grants and donations, explicitly independent of major tech companies. The trade-off is that the project relies on voluntary support, and the site provides a Donate link for anyone who wants to contribute to its operation.

For the specific mechanics of how Signal protects messages, see the related question on how Signal protects privacy and secures messages.