Signal
Platform · this deep dive is built from the official pages of the platform itself and of the tools that support it.
Overview
Signal is a messenger from the American non-profit Signal Technology Foundation. For an SMM handbook this platform is the exception: there is no advertising here, no business account, no channels with subscribers and no creator programme. All the platform offers is messaging, calls and groups with end-to-end encryption.
The platform describes itself like this: "Say 'hello' to a different messaging experience. An unexpected focus on privacy, combined with all of the features you expect". And separately, in plain words: "No ads, no trackers, no kidding. There are no ads, no affiliate marketers and no creepy tracking in Signal".
This is not a marketing turn of phrase but the way the organisation is built. Signal calls itself an independent non-profit not tied to any major technology company and not subject to acquisition; development is supported by grants and donations. Legally it is a non-profit under section 501(c)(3) of the US Internal Revenue Code. The practical conclusion: if your plan is to "start a channel and broadcast", Signal will not let you. Read this article as a description of a tool for closed communications.
Who's here
The platform does not disclose its audience. An estimate exists in a 2018 blog post about the foundation's establishment, which says: "We've built a service that is used by millions, and software that is used by billions". This is a statement by the organisation itself, it is more than eight years old, and the "billions" refers not to the messenger but to the Signal protocol, which other applications use.
Such reticence is consistent: an organisation that does not collect or store sensitive data also publishes user statistics reluctantly.
Languages. The switcher on the front page offers a long list of interface languages — from Afrikaans and Arabic to Chinese and Vietnamese, including Russian, Ukrainian, Kazakh and Persian; the list is visible in the language selector.
Getting started
Registration is by phone number. The terms of service require an age of at least 13 (in some countries the threshold without parental consent may be higher) and registration by phone number with a verification code received.
There is no such thing as a business account. There is no application form, no verification for organisations, no "blue check" and no separate plan for companies. What is more, the terms expressly forbid selling, renting out or charging for the service — that is, reselling access to Signal as a service breaches the agreement.
What has genuinely changed for public figures is the way to be contacted. In 2024 the platform introduced usernames: the phone number stopped being visible by default to everyone you message; a username lets someone start a conversation without revealing the number; a separate setting prevents people from finding you by phone number. The post is dated 20 February 2024. Note that a username is not a permanent identifier and is not visible to the people you chat with — as a public "handle for a brand" it works poorly.
What you can publish
The formats are listed on the front page: text, voice messages, photos, video, GIFs and files, plus voice and video calls and encrypted stickers, including your own packs. Group chats are named as a separate feature.
What is forbidden is set out in the terms briefly and to the point. You may not use the service for illegal or impermissible messages, including bulk mailings, automated messaging and auto-dialling. That is the key line for an SMM specialist: bulk messaging on Signal is forbidden by the agreement, not merely technically awkward. The same document forbids creating accounts by automated means and collecting information about users.
One more limitation worth remembering when planning service communications: Signal does not provide access to emergency services — police, fire brigades, hospitals.
How to grow
The platform provides no mechanisms for audience growth: there is no recommendation feed, no search across public channels, no directory and no advertising. A group chat is the only multi-user form, and it is managed by hand: groups have administrators who remove members, appoint other administrators and configure permissions — who can change the name and avatar and who can add members. The same post introduced "@" mentions. It is dated 14 October 2020.
Among the more recent features useful in working groups, the platform names group member labels (19 March 2026), pinning messages to the top of a chat (29 January 2026) and polls (19 November 2025). There are no built-in statistics on messages or views, and there cannot be: the platform's server does not see the content, and group membership, group names and avatars are unavailable to it.
Path to monetization
Signal does not pay creators: no share of advertising revenue, no in-app donations, no paid account subscriptions and no sticker shop with payouts to creators.
Money here moves towards the platform, not away from it: the organisation asks for donations to cover servers, traffic and development and states that a donor badge appears in an account only if the donation was made inside the app.
The only paid feature appeared in 2025 — backups. The platform explains: all text messages and media from the last 45 days are kept free of charge, while for media history deeper than 45 days together with message history a subscription of 1.99 US dollars a month is offered. The same post says this is the first paid feature in the service's history, and names the reason outright: storing and transmitting large volumes of data costs money, and the organisation does not sell advertising or data. The post is dated 8 September 2025; at that point the feature was available in beta for Android.
Tools and automation
Signal has no public bot API. The documentation section contains not application interfaces but cryptographic specifications: XEdDSA and VXEdDSA, X3DH, PQXDH, Double Ratchet, Sesame, ML-KEM Braid and the Signal Protocol library. This is material for those building their own encryption, not for scheduling posts.
Scheduling and analytics have no place here under the rules themselves: bulk and automated mailings are forbidden, and the server has no access to the content, so there is nothing in Signal to measure.
Limits and rules
- Age. From 13; in some countries the threshold without parental consent is higher.
- Mailings. Bulk messaging, automated messaging and auto-dialling are forbidden.
- Automation. Creating accounts by automated means and collecting data about users are forbidden.
- Commerce. The service may not be sold, rented out or charged for.
- Data. Signal does not sell, rent out or monetize personal data and content; encrypted information and metadata are transferred to the USA and other countries where the organisation has facilities and partners.
- Emergency services. Unavailable.
- Responsibility for the device. The organisation has no access to your messages, so keeping the account safe is up to you; the backup recovery key is 64 characters long, is held only by you, and if it is lost Signal will not be able to help.
Who it's for
It suits an internal rather than a public channel. If you have a closed community, an editorial team, a campaign headquarters, or work with sources or clients for whom privacy matters, Signal is built for exactly that. It also works as a second point of contact for a public figure: a username lets you receive messages without showing your phone number.
It suits organisations with a security policy: the absence of advertising, trackers and data monetization here is not a promise but a consequence of the legal form.
It does not suit promotion. There is no business account, no channels, no recommendations, no advertising, no statistics and no API — not one tool from the SMM specialist's usual kit. It does not suit mailings in any form: they are expressly forbidden by the agreement. And it does not suit you as a source of income: the platform does not pay creators, and the only money flow runs from the user to the foundation.
Verified data
The checked data this deep dive rests on.
About the platform
the platform describes itself as follows: "Say "hello" to a different messaging experience. An unexpected focus on privacy, combined with all of the features you expect."
Self-description: this is the platform's claim about itself, not an independent assessment
source, checked 2026-07-28
the organisation is the Signal Technology Foundation, a non-profit under section 501(c)(3) of the US Internal Revenue Code
The page gives the organisation's tax identifier
source, checked 2026-07-28
Who's here
the platform does not publish user numbers; the only estimate encountered is "a service that is used by millions, and software that is used by billions" in a blog post of 21 February 2018
The "billions" refers to the Signal protocol in other applications, not to the messenger
source, checked 2026-07-28
Account and access
since February 2024 the phone number has not been visible by default to everyone you message; a username allows a conversation to be started without revealing the number, but it is not a permanent identifier and is not visible in chats · the source is dated 2024-02-20
A post of 20 February 2024
source, checked 2026-07-28
Promotion
the platform provides no audience growth: there are no recommendation feeds, no directory and no search for public channels; groups have administrators, permissions and "@" mentions · the source is dated 2020-10-14
A post of 14 October 2020; the server does not see group membership, names or avatars
source, checked 2026-07-28
Advertising
there is no advertising: the platform states "No ads. No trackers. No kidding" and denies having affiliate marketers and tracking
The platform's claim about itself
source, checked 2026-07-28
Paid subscriptions
the first paid feature in the service's history: all text messages and media from the last 45 days are kept free of charge, while for media history deeper than 45 days and message history a subscription of 1.99 US dollars a month is offered · the source is dated 2025-09-08
A post of 8 September 2025; at that point the feature was in beta for Android
source, checked 2026-07-28
the 64-character backup recovery key is generated on the device and is not sent to the servers; if it is lost, access to the backup is lost for ever
The platform warns outright that it will not be able to help
source, checked 2026-07-28
Limits and restrictions
the minimum age is 13; in some countries the threshold without parental consent may be higher
The About our services section
source, checked 2026-07-28
Restrictions
the terms forbid sending illegal or impermissible messages, including bulk mailings, automated messaging and auto-dialling, as well as creating accounts by automated means and collecting data about users
Legal and Acceptable Use / Harm to Signal
source, checked 2026-07-28
the service provides no access to emergency services
No Access to Emergency Services
source, checked 2026-07-28
Languages
front page interface language: en; the declared language versions are: af, ar, az, bg, bn, bs, ca, cs, da, de, el, en and 55 more
The language is taken from the markup attribute, the versions from hreflang. The "and N more" figure is OUR count of the remaining hreflang links in the markup, not a claim by the source: that number does not appear on the page.
source, checked 2026-07-28
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