Signal vs WhatsApp
Side-by-side comparison of features, pricing, ratings, and alternatives.
Signal is a nonprofit messaging app focused on privacy, with end-to-end encryption for all messages and calls by default and minimal metadata collection. It is the recommended choice for private communication.
WhatsApp is a globally dominant messaging app offering end-to-end-encrypted text, voice, and video, plus business tools. Its ubiquity makes it the default communication channel in many countries.
Free and open source, funded by donations.
Free for individuals; WhatsApp Business has paid API tiers.
- Best-in-class privacy
- E2E encryption by default
- Open source
- Free, no ads
- Nearly universal reach
- E2E encrypted
- Reliable calls
- Free for individuals
- Requires phone number
- Smaller network than WhatsApp
- Fewer bells and whistles
- Owned by Meta (privacy concerns)
- Ties to phone number
- Business API can be costly
What reviewers say
Signal Reviews
4.8 (4)Great messaging
Tried Signal recently. Free, no ads. Minor gripe: fewer bells and whistles. Would recommend.
Solid choice
We rolled out Signal last quarter. Free, no ads. No real complaints. Would recommend.
Solid choice
We rolled out Signal last quarter. Best-in-class privacy. No real complaints. Would recommend.
WhatsApp Reviews
4.3 (4)Great messaging
We rolled out WhatsApp last quarter. E2E encrypted. No real complaints. Would recommend.
Great messaging
Tried WhatsApp recently. Nearly universal reach. No real complaints. Would recommend.
Good, not perfect
We rolled out WhatsApp last quarter. Upside: reliable calls. Downside: owned by meta (privacy concerns).
More alternatives & similar tools
Alternatives to Signal
View all →
The Verdict
AI-generated from listing dataSignal is the safer default for privacy‑focused users, while WhatsApp offers broader reach and richer business features at the cost of more data exposure.
Key differences
- •Network size: WhatsApp reaches virtually everyone; Signal’s user base is smaller.
- •Privacy model: Signal is open‑source with minimal metadata; WhatsApp collects more data and is owned by Meta.
- •Business tools: WhatsApp provides paid Business API; Signal has no dedicated business messaging features.
- •Platform deployment: WhatsApp is cloud/SaaS across web and mobile; Signal is a desktop app plus mobile clients.
- •Open‑source status: Signal’s code is publicly auditable; WhatsApp’s code is closed.
Pricing & value
Both are free for individual users; WhatsApp Business API may incur costs, but basic use remains free.
Ease of use / learning curve
WhatsApp’s phone‑number login and ubiquitous UI make onboarding trivial for most users.
Features & depth
WhatsApp adds voice/video calls, business messaging tools, and a web client; Signal offers fewer extra features.
Integrations & ecosystem
WhatsApp provides a paid Business API for integration; Signal has no comparable business integration.
Collaboration
WhatsApp supports group chats with up to 1024 participants and broadcast lists; Signal’s group limits are lower.
Scalability
WhatsApp’s global infrastructure handles billions of daily messages; Signal’s scale is smaller but sufficient for its niche.
Security & privacy
Signal is open‑source, collects minimal metadata, and is funded by donations; WhatsApp is owned by Meta and gathers more data.
Choose Signal if…
Privacy‑concerned individuals or small teams prioritizing data protection.
Choose WhatsApp if…
Businesses needing mass reach, API integration, or familiar consumer messaging.
Common questions
Is there any cost to use WhatsApp for business?
WhatsApp is free for individuals; the Business API has paid tiers, so large‑scale business use can be costly.
Can I audit the source code of either app?
Signal is open source and fully auditable; WhatsApp’s code is closed and not publicly available.
Do both apps require a phone number to register?
Yes, both WhatsApp and Signal require a phone number for initial account creation.