Can I use OpenDescent on mobile?

Not yet. OpenDescent is currently Windows-only, with macOS and Linux builds in progress and a mobile PWA on the roadmap. Signal has mature native apps on iOS, Android, Windows, macOS, and Linux. If mobile-first is a hard requirement, Signal is the better choice today.

▶ Breaking

Meta is ending end-to-end encryption on Instagram DMs — May 8 2026. Here's what to use instead → // Discord leaked 70,000 government IDs. Why we built this → // OpenDescent v0.5.4 released — hubs, live streaming, signed file sharing. Download → // Normal life deserves privacy. // Meta is ending end-to-end encryption on Instagram DMs — May 8 2026. Here's what to use instead → // Discord leaked 70,000 government IDs. Why we built this → // OpenDescent v0.5.4 released — hubs, live streaming, signed file sharing. Download → // Normal life deserves privacy. //

Comparison / OpenDescent vs Signal Published 2026-04-24

A decentralized Signal alternative without a phone number.

Q: Is Signal a good messaging app?

Signal is excellent. It is generally considered the gold standard for private messaging — nonprofit-run, open source, with strong end-to-end encryption based on the Signal Protocol used even by WhatsApp. For one-to-one private conversations, Signal is still the easiest, most-audited, and most-recommended option for most people. OpenDescent is not claiming to be 'better than Signal' — we are decentralized where Signal is centralized, and require no phone number where Signal does.

Q: Why does Signal require a phone number?

Signal's team says phone numbers make sign-up simpler for most users and make it harder for spammers to create fake accounts at scale. Signal added usernames in 2024, so you can hide your phone number from other users — but a phone number is still required to register. Signal's own leadership has acknowledged that the phone number requirement is critics' most persistent complaint.

Q: Is OpenDescent better than Signal?

Not in every way. Signal has a larger user base, a longer track record of independent cryptographic audits, and native apps on every platform. OpenDescent is different, not strictly better: we are peer-to-peer (Signal runs on central servers), require no phone number (Signal does), and include Discord-style community hubs (Signal does not). Which matters more depends on what you need.

Q: What happens if Signal's servers go down?

Signal relies on central infrastructure. When Amazon Web Services experienced a major outage in late 2025, Signal was affected — leading some security commentators to argue 'we need to go beyond Signal' for resilience. OpenDescent is peer-to-peer, so there is no central infrastructure to go down; messages route between devices through a mesh network.

Q: Does OpenDescent use the Signal Protocol?

No. OpenDescent uses standard public-key cryptography primitives — X25519 for key exchange, AES-256-GCM for message encryption, Ed25519 for signatures — combined with libp2p for peer-to-peer networking. The design achieves forward secrecy through ephemeral key agreement per message. The Signal Protocol is a specific design by Open Whisper Systems; we did not reuse it, but the security properties are comparable for our threat model.

Signal is excellent — the gold standard for private messaging and the reason end-to-end encryption went mainstream. OpenDescent isn't out to replace it; we're a different trade-off. Peer-to-peer instead of central servers. No phone number instead of one. Community hubs instead of just 1-on-1. An honest comparison — including where Signal is still better.

▶ Download for Windows See the comparison

OpenDescent

P2P · No phone

Signal

Central · Phone #

E2E encryptedyes · yes Phone requiredno · YES Peer-to-peerYES · no Community hubsYES · no Mobile appssoon · YES

Short version

Signal is excellent. If you want the easiest, most-recommended, most-audited private messenger for 1-on-1 chat, use Signal. We mean it.
OpenDescent is different in three specific ways: no phone number required, peer-to-peer instead of central servers, and community hubs (think Discord-shaped, not just group chats).
Where Signal is still better: mobile apps, independent audit history, and your friends probably already use it.
Our read: use Signal for 1-on-1 with people who are already on it. Use OpenDescent when you want true peer-to-peer, no phone number, or community hubs.

Feature-by-feature. Honest about where we lose.

§ 01 / Compared

Capability	OpenDescent	Signal
Encryption
End-to-end encrypted by default	Yes	Yes
Forward secrecy	Yes · per-message X25519	Yes · Double Ratchet
Voice & video encrypted	Yes · DTLS-SRTP	Yes
Independent cryptographic audit history	Not yet	Extensive
Identity
Phone number required	Never	Yes · required
Email required	Never	No
Usernames instead of phone	Always	Added 2024 · phone still required
Account recovery	12-word mnemonic	PIN + phone
Network architecture
Peer-to-peer	Yes · libp2p mesh	No · central servers
Central infrastructure	None	Signal-operated
Affected by AWS outages	No	Yes (2025)
Can be subpoenaed for data	No entity to subpoena	Minimal metadata only
Features
1-on-1 messaging	Yes	Yes
Group chat	Yes · encrypted	Yes · up to 1,000
Community hubs (Discord-style)	Yes	No
Voice channels	Yes	No
Live streaming	Yes · mesh-pull	No
Disappearing messages	Roadmap	Yes
Stickers	Roadmap	Yes
Platform
Windows	Yes	Yes
macOS	Soon	Yes
Linux	Soon	Yes
iOS	Roadmap (PWA)	Yes
Android	Roadmap (PWA)	Yes
Governance
Open source	MIT	GPLv3 / AGPL
Organisation	Independent dev team	Non-profit · Signal Foundation
Funded by	Pro subs · Founders	Donations · grants

Where Signal is still better. Where we're different.

§ 02 / The honest read

Use Signal if

Where Signal is still the right answer.

Your friends are already there. The best private messenger is the one you can actually message people on. If your family group chat and your partner and your closest friends are all on Signal, starting there is almost always the right move.
Mobile is non-negotiable. Signal has mature native iOS and Android apps. OpenDescent is currently Windows-only; mobile is on the roadmap via a PWA, but it's not ready. If you message mostly from a phone, Signal wins today.
You want the longest audit track record. The Signal Protocol has been independently reviewed by top-tier cryptographers for over a decade. WhatsApp, Meta's own Messenger, Google's RCS, and Skype all license or base their E2E on it. OpenDescent uses standard primitives well, but hasn't been through a professional cryptographic audit yet.
Non-profit governance matters to you. The Signal Foundation is a proven model: no ads, no shareholders, no pressure to monetise. OpenDescent is a small independent team with a Pro subscription model; that's a different (and less proven) funding arrangement.

Use OpenDescent if

Where OpenDescent is meaningfully different.

You don't want to give anyone your phone number. Signal's own team calls this critics' most persistent complaint — and it hasn't changed. OpenDescent requires no phone number, no email, no account. Ever.
You want true peer-to-peer, not "encrypted on central servers." Signal's cryptography is excellent, but Signal still runs on Signal-operated infrastructure. When AWS went down in late 2025, Signal went with it. OpenDescent messages route directly between devices — there's no centre to take down.
You want community hubs, not just group chat. Signal does small group chats (up to ~1,000). It doesn't do channels, voice rooms, or roles the way a Discord server does. OpenDescent hubs give you that shape — peer-replicated, encrypted, no server owner.
You want zero metadata collected, not "minimal." Signal collects very little metadata — much less than any commercial messenger — but the servers know when you came online and which number registered with which account. OpenDescent has no server to know anything, because there isn't one.

The phone number problem. Signal's own top complaint.

§ 03 / Deep dive

Signal's leadership openly acknowledges that the phone number requirement is critics' most persistent complaint. In 2024 Signal added usernames, which let you hide your phone from other users. But the phone number is still required for Signal itself to register your account.

"We know the phone number requirement is our critics' most persistent complaint … phone numbers make it simpler for most people to use Signal, and harder for spammers to make fake accounts." — Signal leadership, paraphrasing Signal's 2024 username announcement

That's an honest trade-off — spam resistance and onboarding simplicity really are hard problems. But a phone number is still a government-issued identifier tied to your legal identity, given to a third party to use a messaging app. If your threat model includes a hostile government, a divorce, a stalker, or just a future Signal policy change, the phone number is the most durable piece of personal data you've handed over.

How OpenDescent solves this without servers

Because OpenDescent is peer-to-peer, we don't have a "registration server" that needs to prove you're a real human. Your identity is a cryptographic key — an Ed25519 keypair generated locally on your device the first time you open the app. Spam is limited by the fact that messages require an established peer relationship (via invite or username lookup), and by the cost of generating a new identity each time you're blocked.

We don't claim to solve spam better than Signal. We claim to solve it differently — and in a way that doesn't require you to hand over the one piece of personal information that nobody should have to hand over to send a text.

Sources

The Intercept — Signal's new usernames ↗ Signal — Keep your phone number private with Signal usernames ↗ The Intercept — How I got a truly anonymous Signal account ↗ TechRadar — We need to go beyond Signal (AWS outage) ↗

Questions, straight answers.

§ 04 / FAQ

Is Signal a good messaging app?01

Yes — genuinely. Signal is widely and correctly considered the gold standard for private messaging. It's nonprofit-run, open source, extensively audited, and the cryptography it pioneered is the basis for WhatsApp, Meta's Messenger, Google's RCS E2E, and Skype. For most people, most of the time, Signal is still the right answer. We're a different trade-off, not a replacement.

Why does Signal require a phone number?02

Signal's team says phone numbers simplify sign-up for most users and make large-scale spam harder. In 2024, Signal added usernames so you can hide your phone from other users — but a phone number is still required to register with Signal itself. Signal's own leadership calls this critics' most persistent complaint.

Is OpenDescent better than Signal?03

Not in every way. Signal has a larger user base, a longer audit track record, and native mobile apps. OpenDescent is different: peer-to-peer instead of centralised, no phone required instead of required, with community hubs instead of just group chat. Which matters more depends on what you need.

What happens if Signal's servers go down?04

Signal relies on central infrastructure. When AWS had a major outage in late 2025, Signal was affected — which led some security commentators to argue we need to go beyond Signal for resilience. OpenDescent is peer-to-peer: there's no central infrastructure to take down, because the network is the users.

Can I use OpenDescent on my phone?05

Not yet. OpenDescent is currently Windows-only. macOS and Linux builds are in progress; a mobile PWA is on the roadmap. If you message mostly from a phone and don't want to wait, Signal is the better choice today.

Does OpenDescent use the Signal Protocol?06

No. OpenDescent uses standard public-key primitives — X25519 for key exchange, AES-256-GCM for message encryption, Ed25519 for signatures — combined with libp2p for peer-to-peer networking. The security properties (forward secrecy, message authentication) are comparable for our threat model, but the specific design is ours. If you want the Signal Protocol specifically, use Signal.

Has OpenDescent been independently audited?07

Not yet. The code is open source (MIT) and auditable by anyone, and we use standard cryptographic primitives used by Signal, TLS, SSH, and everything else on the internet. A formal audit is on the roadmap but costs tens of thousands of pounds, which we're working toward. Signal, by contrast, has been reviewed by professional cryptographers for over a decade.

Can I use Signal and OpenDescent together?08

Yes, and we think most people who try both will. Signal for the conversations already happening there. OpenDescent for the communities, the people you don't want to give your phone number to, and the setups where you specifically want no central server in the middle.

The summary

Signal is great. We're a different answer.

Use Signal where it wins. Use OpenDescent for peer-to-peer, no phone number, and community hubs.

▶ Download for Windows See how it works