Ciphar vs Signal — Encrypted Chat Without a Phone Number
Signal is widely regarded as the gold standard for end-to-end encrypted messaging. So is Ciphar trying to replace it? No. They solve different problems and you should use both, depending on what you are doing.
The short answer
Use Signal for ongoing relationships with people you trust enough to share your phone number with. Use Ciphar for short, one-off, or anonymous conversations where you specifically do not want to share your phone number, install anything, or leave a persistent contact record on either device.
Feature comparison
| Ciphar | Signal | |
|---|---|---|
| Account required | No | Yes |
| Phone number required | No | Yes (or username, with phone still on file) |
| App install required | No (browser) | Yes |
| End-to-end encryption | AES-256-GCM, PBKDF2 key derivation | Signal Protocol (X3DH + Double Ratchet) |
| Self-destruct by default | Yes (60 minutes) | No (disappearing messages opt-in) |
| Persistent message history | No | Yes (on device) |
| Contact list | None | Yes (synced from phone) |
| Voice / video calls | Encrypted voice rooms (browser) | Yes (voice and video) |
| Reproducible builds / open source | Web app, source-visible | Yes, both |
Why Ciphar exists when Signal already does
Signal's strength — a real account tied to your number, with persistent history — is also a friction point for certain conversations. A journalist receiving a tip from a stranger does not want to hand that stranger their phone number. A whistleblower contacting an investigative reporter for the first time does not want either party to install an app and create an account before the first message. A lawyer doing a 30-minute confidential intake does not want a permanent message history on a device that may be subpoenaed later. Ciphar handles those cases.
When to use Signal instead
If any of these apply, Signal is the better tool:
- You will be talking to this person again, regularly, for months or years.
- You want native push notifications and offline message delivery.
- You need encrypted video calls.
- Your threat model includes a sophisticated adversary who could attack the JavaScript delivery channel of any web app — a native app with reproducible builds is a stronger choice.
- You want a verified, audited cryptographic protocol with a long peer-reviewed track record.
When to use Ciphar instead
- You do not want to give the other party your phone number.
- You do not want to install or be seen installing a privacy app.
- The conversation is one-off or short-lived.
- You want the channel and all its history to be irrecoverable after a fixed time, with no "forgot to enable disappearing messages" risk.
- You need the other party to be able to join from any device, immediately, with nothing more than a link.
Honest summary
Signal is a messenger; Ciphar is a one-time encrypted room. Pick the right tool for the conversation. They do not compete — they cover different ends of the privacy spectrum.
Other comparisons: vs WhatsApp · vs Telegram · vs Privnote. Forge a Ciphar channel.