OSHI vs WhatsApp — The Private Alternative

WhatsApp is the most widely used messenger on Earth, with well over two billion users, and it protects the contents of your chats with the same Signal Protocol encryption OSHI is built around. Its ubiquity is a genuine strength — nearly everyone you know already has it.

The difference is not the message encryption; it is everything around it. WhatsApp is owned by Meta, requires your phone number, and collects a substantial amount of metadata — who you talk to, when, how often, your device and contacts. OSHI is a Swiss, open-source, MIT-licensed messenger that needs no phone number, keeps almost no metadata, and can even deliver messages over a Bluetooth and WiFi mesh when there is no internet at all. If your concern is not just "can someone read my messages" but "who knows I am sending them," that gap matters. This page compares the two fairly.

Feature comparison: OSHI vs WhatsApp

Where WhatsApp genuinely wins

WhatsApp's biggest advantage is reach. With billions of active users it has a network effect no privacy app can match, which means you can actually message your family, your plumber and your kid's school without convincing anyone to install something new. Message contents are end-to-end encrypted by default using the audited Signal Protocol, voice and video calls work reliably worldwide, and the app is polished, fast and available on essentially every platform including a proper desktop app. For many people, WhatsApp is "good enough" privacy with unbeatable convenience, and that is a legitimate position.

The metadata and ownership problem

Encryption protects the contents of a message, not the facts about it. WhatsApp still requires your phone number, ties your account to your real identity, reads your address book to find contacts, and — as Meta's own privacy disclosures describe — collects usage and interaction metadata that can be shared across Meta's businesses. For most users this is a fair trade for convenience. For journalists, activists, or anyone whose network of contacts is itself sensitive, it is a real limitation. OSHI removes the phone number entirely and routes over decentralized transports, so there is far less metadata to collect in the first place.

Where OSHI is different

OSHI is built for the threat models WhatsApp cannot serve. There is no phone number and no Meta account behind your identity. It is fully open source under the MIT licence, so anyone can inspect exactly what it does. And it does not depend on the internet: OSHI can relay encrypted messages device-to-device over Bluetooth and WiFi, through up to five hops, so it keeps working during outages, censorship, or in places with no coverage. It adds on-device AI for translation and writing help that never touches a server, plus steganographic covert channels for hostile network conditions. WhatsApp offers none of these.

Who each app suits

Use WhatsApp for everyday communication with the widest possible circle of people, where convenience and reach outweigh metadata concerns, and where you are comfortable with a Meta-owned, closed-source app tied to your phone number.

Use OSHI when you want to minimise metadata, avoid giving out a phone number, keep an open-source app you can audit, and retain the ability to communicate offline or under censorship. A common pattern is to keep WhatsApp for the masses and move sensitive conversations to OSHI.

Frequently asked questions