Signal is a free, nonprofit messaging app that encrypts every message, call, and file end to end by default, with no ads or trackers. It suits anyone who needs private everyday communication and does not want a commercial platform reading along.
Signal is a messaging app built around end-to-end encryption, and it applies that protection to everything by default rather than offering a private mode you have to switch on. Setup takes a phone number and a name: there are no feeds to configure, no advertising profile to fill in, and no contact suggestions pulled from a social graph. From there you send text, photos, videos, files, and voice notes, hold voice or video calls, and gather people into group chats, with the option to hide your number behind a username. Registration pins the account to a phone number, and the app keeps working across linked devices.
The nonprofit structure shapes the product. There is no advertising business, no data resale, and no parent company that could change those terms through an acquisition, so the roadmap answers to grants and donations instead. Practically, that means a deliberately narrow feature set: no channels for broadcasters, no app store of embedded services, and no plugins. The team has also leaned into resistance rather than reach, adding support for proxies that keep the service usable when a network blocks it, which matters to journalists and organizers working under censorship. Anyone comparing it with a more commercially minded messenger such as Viber will notice the absence of stickers for purchase, business broadcasting tools, and paid calling.
The case for Signal rests on guarantees that do not depend on trusting a company's promises. Encryption is applied to messages, calls, and attachments without configuration, message metadata is minimized so the service has little to hand over, and the code is published for independent review. A phone number can be hidden behind a username, which lets you join a group or hand out a contact address without revealing the line you registered with. Safety numbers let two people confirm they are talking to the intended device, and a registration PIN blocks someone from re-registering your number elsewhere. Everyday needs are covered as well: replies, edits, reactions, view once media, stories, scheduled sends, disappearing messages, encrypted sticker packs, and a notes to self thread. Calls work for pairs and groups, desktop screen sharing covers remote help, and proxy support keeps the service reachable on networks that try to block it. For practical privacy, that combination is hard to match.
Key capabilities and highlights.
Messages, calls, attachments, and group conversations are protected end to end by default, with no private mode to enable and no setting that trades privacy for extra features. Keys stay on the participating devices, which means the service itself cannot read your conversations even if it wanted to.
Voice and video calls between users cost nothing beyond your data connection, whether the other person is across town or on another continent. Group calls let several people join the same conversation, and on desktop, screen sharing turns a call into a quick way to walk someone through a problem.
You can register a username and share that instead of your phone number, so new contacts reach you without ever learning the line you signed up with. Phone number visibility can be limited to specific people, which helps when joining large groups or handing out a contact address publicly.
Groups accommodate a large number of members, with administrators able to add or remove people and control who may edit group details. Mentions, replies, and per-group notification settings keep a busy thread manageable, and everything posted in the group is encrypted just like a one-to-one conversation.
Set a timer on a conversation and new messages remove themselves after the chosen interval, from a few seconds to a few weeks. View-once photos and videos open a single time and cannot be replayed from the chat, which is handy for sharing something sensitive without leaving it behind.
A registration PIN in Signal stops someone who controls your phone number from creating a new account in your name on another device. Safety numbers let two people verify they are communicating with the right device, and the app warns both sides if a contact's encryption details change unexpectedly.
A Signal desktop client pairs with the phone by scanning a code, after which conversations appear on a larger screen with a real keyboard. Chats and history sync across linked devices, so you can start typing on a phone and finish on a computer without forwarding anything to yourself.
The project is run by an independent nonprofit supported by donations and grants rather than advertising or data sales, which removes the usual incentive to profile users. There are no trackers or affiliate links inside the app, and the clients are published as open source for anyone to audit.
Browse historical releases and previous builds.
Common questions about Signal.
It is a free messaging and calling app whose defining feature is encryption that always applies. Text, photos, files, voice notes, and calls are protected end to end by default, and the service is operated by a nonprofit funded by donations rather than advertising.
Yes. Messaging and calls between users cost nothing beyond your data connection, and there are no premium tiers, ads, or in-app purchases. Development is funded by grants and donations to the nonprofit that runs the project.
A phone number is still required to register, but you can create a username and hand that out instead, and you can restrict who is allowed to see your number. That lets you join groups or share a contact address without revealing the line tied to the account.
No, not with the encryption intact. Signal conversations are end to end encrypted, so only the participating devices hold the keys needed to decrypt them. The service minimizes the metadata it keeps as well, and safety numbers let two people confirm they are talking to the right device.
Signal keeps message history on the device rather than in a cloud account, so restoring a lost phone generally means losing past conversations unless you made a local backup or transferred the account to the new device. The account can be re-registered using the same number, and a registration PIN helps stop someone else claiming it first.
Yes. A desktop client links to your phone by scanning a code, and once paired it shows the same conversations with synchronized history, so replies can be typed with a keyboard. Screen sharing during calls is available there as well, which is useful for talking someone through a task.
The app includes support for proxies, which can keep the service reachable when a network blocks it, and community-run proxies are often published for that purpose. Availability still depends on local circumstances and, in some places, legal restrictions on circumvention tools.
Signal is a free, nonprofit messaging app that encrypts every message, call, and file end to end by default, with no ads or trackers. It suits anyone who needs private everyday communication and does not want a commercial platform reading along.
Element is a Matrix-based secure messenger and collaboration app with end-to-end encryption, group calls, and file sharing. It targets individuals, teams, and public institutions that want to self-host their own messaging network instead of renting one.
Bria is a SIP softphone that turns a Windows, macOS, iOS or Android device into a business phone, handling HD voice and video calls, messaging and screen sharing through the accounts your organisation already owns.
Nextcloud is a self-hosted collaboration platform whose desktop client keeps folders synchronised with your own server. It supports on-demand virtual files, selective sync, multiple accounts, end-to-end encrypted folders, and notifications from apps like Talk.
Telegram Desktop is an open-source Windows messaging client for synchronized chats, group conversations, channels, calls, and file sharing through a full keyboard-and-mouse interface across linked devices.
Comments