Signal vs WhatsApp
Updated October 2026 · AppBreakup editorial
Signal
Nonprofit, open-source messenger with end-to-end encryption on every chat and call.
Meta's free phone-number messenger for chats, voice notes and calls, used by billions worldwide.
The short answer
WhatsApp is the practical choice when everyone you know already uses it; Signal is the choice when privacy matters most. Both encrypt messages end to end with the same Signal Protocol, so the biggest difference is metadata and ownership: Meta collects data on who you talk to and when, while nonprofit Signal collects almost nothing.
Signal or WhatsApp: our take
On the surface these apps do the same job: one-to-one and group chats, voice notes, voice and video calls, stories or status updates, and disappearing messages, all end-to-end encrypted by default. WhatsApp even licenses the Signal Protocol for its encryption. Both are free, and both need a phone number to sign up, although Signal lets you hide yours behind a username.
The difference is what happens around the messages. WhatsApp is owned by Meta, which collects usage metadata such as who you talk to and when, earns money from business messaging and ads in the Updates tab, and has built Meta AI into the app. Signal is run by an independent nonprofit funded by donations, with no ads and no tracking, and is designed to know almost nothing about you, including your contacts, group names and memberships. Signal's apps are open source under AGPL-3.0; WhatsApp's are not.
WhatsApp wins on network and extras. With more than 3 billion users it is the default messenger in much of the world, and it adds Communities, Channels and WhatsApp Business. Groups hold up to 1,000 people and group calls up to 32. Signal's network is smaller, so getting friends and family onto it can take persuasion. On desktop, both depend on the phone: WhatsApp links up to four other devices, and Signal's desktop apps for Windows, Mac and Linux require Signal on your phone. WhatsApp also has a web version; Signal does not.
Choose WhatsApp when reaching people and businesses easily is the priority and Meta's data practices don't bother you. Choose Signal for conversations where privacy matters, or if you want to avoid Meta entirely. Many people use WhatsApp for the wider world and Signal for close contacts.
Which should you pick?
Choose Signal if…
- Anyone who wants the strongest mainstream privacy without giving up a familiar chat app
- You want open-source software
- You need Linux, which WhatsApp doesn't list
- Everything end-to-end encrypted by default, including groups
- Collects almost no metadata
Choose WhatsApp if…
- Anyone who wants to reach friends, family and businesses on the messenger they already use
- You need Web, which Signal doesn't list
- Almost everyone in many countries already has it
- Chats and calls are end-to-end encrypted by default
About each app
What is Signal?
Signal is the messenger privacy experts usually recommend first. Every message, voice note, file and call is end-to-end encrypted with the Signal Protocol, which WhatsApp and others also license, and Signal goes further by collecting almost no metadata: it can't see who your contacts are, what your groups are called or who is in them. It covers the everyday basics well, with group chats, voice and video calls, stories, stickers and disappearing messages, and usernames let you chat without sharing your phone number, though you still need one to register. It is run by the Signal Foundation, a US nonprofit funded by donations, so there are no ads, no tracking and no paid tier. The apps are open source. It runs on Android and iPhone, with desktop apps for Windows, Mac and Linux that link to your phone. Its main weakness is network size: you may need to persuade friends to install it.
What is WhatsApp?
WhatsApp is the default messenger in much of the world, so its biggest feature is that the people you want to reach are probably already on it. You sign up with a phone number, then send texts, voice notes, photos, documents and stickers, make voice and video calls, and join groups and Communities. Chats and calls are end-to-end encrypted by default using the Signal Protocol, although Meta still collects metadata such as who you talk to and when. Channels add one-way broadcasts from creators and brands, and Meta AI is built into the app. Personal use is free with no subscription; Meta earns money from WhatsApp Business messaging and ads in the Updates tab. It runs on Android and iPhone, with desktop apps for Windows and Mac and a browser version. Your phone remains the primary device, though up to four other devices can be linked. People who distrust Meta's data practices usually look at Signal, while those who want large public groups move to Telegram.
Side by side
| Attribute | Signal | |
|---|---|---|
| Pricing | Free | Free |
| Open source | Yes | No |
| Self-hostable | No | No |
| Platforms | Windows, macOS, Linux, iOS, Android | Web, Windows, macOS, iOS, Android |
| Best for | Anyone who wants the strongest mainstream privacy without giving up a familiar chat app | Anyone who wants to reach friends, family and businesses on the messenger they already use |
| Status | Active | Active |
Verified facts, compared
Facts both apps publish, checked on each vendor's own site.
| Fact | Signal | |
|---|---|---|
| End-to-end encryption | Always on | Yes, by default |
Signal vs WhatsApp pricing
Platforms
| Platform | Signal | |
|---|---|---|
| Web | ||
| Windows | ||
| macOS | ||
| Linux | ||
| iOS | ||
| Android |
Signal facts
5 of 5 verified- License
- AGPL-3.0
- Checked Oct 25, 2026github.com(opens source in a new tab)
- “License: AGPL-3.0 (GNU Affero General Public License v3.0).”
- Organisation
- Independent nonprofit
- Checked Oct 25, 2026signal.org(opens source in a new tab)
- “Free for Everyone Signal is an independent nonprofit.”
- Ads and tracking
- None
- Checked Oct 25, 2026signal.org(opens source in a new tab)
- “There are no ads, no affiliate marketers, and no creepy tracking in Signal.”
- End-to-end encryption
- Always on
- Checked Oct 25, 2026signal.org(opens source in a new tab)
- “Privacy isn’t an optional mode — it’s just the way that Signal works.”
- Desktop app
- Requires Signal on your phone
- Checked Oct 25, 2026signal.org(opens source in a new tab)
- “To use the Signal desktop app, Signal must first be installed on your phone.”
WhatsApp facts
6 of 6 verified- Price
- Free
- Checked Oct 25, 2026whatsapp.com(opens source in a new tab)
- “private messaging and calling for free*, available all over the world.”
- End-to-end encryption
- Yes, by default
- Checked Oct 25, 2026whatsapp.com(opens source in a new tab)
- “Learn more Speak freely With end-to-end encryption on WhatsApp, your personal messages and calls are secured with a lock.”
- Group size
- Up to 1,000 people
- Checked Oct 25, 2026whatsapp.com(opens source in a new tab)
- “invite up to 1000 people to your WhatsApp group.”
- Group calls
- Up to 32 people
- Checked Oct 25, 2026whatsapp.com(opens source in a new tab)
- “Get more done and have fun with your groups of up to 32 people.”
- Users
- More than 3 billion
- Checked Oct 25, 2026whatsapp.com(opens source in a new tab)
- “More than 3 billion people in over 180 countries use WhatsApp 1 to stay in touch with friends and family, anytime and anywhere.”
- Owner
- Meta (joined Facebook in 2014)
- Checked Oct 25, 2026whatsapp.com(opens source in a new tab)
- “WhatsApp joined Facebook in 2014”
Pros and cons of Signal
- Everything end-to-end encrypted by default, including groups
- Collects almost no metadata
- No ads, tracking or paid tier; open source
- Needs a phone number to register
- Desktop app only works linked to a phone
- Smaller network than WhatsApp in most countries
Pros and cons of WhatsApp
- Almost everyone in many countries already has it
- Chats and calls are end-to-end encrypted by default
- Reliable group chats, voice notes and group video calls
- Owned by Meta, which collects usage metadata
- Requires a phone number to sign up
- Ads and Meta AI are creeping into the app
Other apps to consider
MollyInstead of Signal
A hardened Signal fork for Android with database encryption, Tor support and no Google services.
ThreemaInstead of Signal
Similar privacy without needing a phone number, from a Swiss company that charges once.
SessionInstead of Signal
No phone number and onion-routed delivery, for people who want Signal-level privacy without an account.
TelegramInstead of WhatsApp
Cloud-synced chats on every device, huge groups and public channels, without a phone-tethered setup.
ViberInstead of WhatsApp
Another free, encrypted mass-market messenger with good desktop apps and cheap calls to landlines.
SimpleX ChatInstead of WhatsApp
No phone number or user ID at all, for those who want to cut ties with account-based messengers.
Signal vs WhatsApp: common questions
Is Signal better than WhatsApp?
WhatsApp is the practical choice when everyone you know already uses it; Signal is the choice when privacy matters most. Both encrypt messages end to end with the same Signal Protocol, so the biggest difference is metadata and ownership: Meta collects data on who you talk to and when, while nonprofit Signal collects almost nothing.
Is Signal free?
Yes, Signal is free.
Is WhatsApp free?
Yes, WhatsApp is free.
Is Signal or WhatsApp open source?
Signal is open source; WhatsApp is not.
Which platforms do Signal and WhatsApp support?
Signal: Windows, macOS, Linux, iOS and Android. WhatsApp: Web, Windows, macOS, iOS and Android.