Most privacy comparisons are thinly disguised sales pitches: the competitor is always slow, leaky, and compromised, and the product doing the comparing is flawless. That's not useful to anyone actually trying to choose a tool. So here's the rule for this piece — every product gets a fair account of what it does well before we get to where Haven differs. If you finish reading and decide Signal is right for you, that's a good outcome.
Haven is end-to-end encrypted email and private messaging under one identity, built on open standards (OpenPGP for email, MLS / RFC 9420 for chat), with keys that only ever exist on your device. That "and" is the whole thesis, and it's the cleanest way to understand the comparisons below: the other three each do part of what Haven does, very well, and leave the rest to a second app.
Haven vs Proton Mail
What Proton does well. Proton Mail is the most mature privacy-email product on the market. It has a polished app on every platform, a large engineering team, audited open-source clients, and an entire ecosystem around it — Calendar, Drive, VPN, Pass. Email content is encrypted with zero-access encryption, and it's PGP-compatible, so you can exchange encrypted mail with PGP users on other services. For most people who just want "Gmail but private," Proton is a reasonable, well-supported choice.
Where Haven differs. Proton is a Swiss company, and Swiss law has a ceiling that's worth understanding. In 2021, Proton was served a legally binding order by Swiss authorities (relayed from French police via Europol) and was compelled to begin logging the IP address of a French climate activist, which contributed to an arrest. Proton did nothing wrong here — it complied with a lawful order, exactly as any law-abiding company must. That's the point: "trust us" has a legal ceiling, and that ceiling is set by jurisdiction and corporate structure, not by good intentions.
Haven's answer is architectural rather than promissory. The server runs inside a Confidential VM (AMD SEV-SNP) where the hardware itself prevents the operator from reading memory contents — so plaintext is inaccessible even with full root access, even under a court order, because there is nothing to hand over. Outbound connections route through a relay so the core server's IP isn't exposed to senders or image hosts. And Haven is deliberately single-jurisdiction by choice, with infrastructure outside US legal reach. The other structural difference: Proton does email; it does not do Signal-class real-time chat. Haven does both under the same identity.
Haven vs Tuta (formerly Tutanota)
What Tuta does well. Tuta makes a genuinely thoughtful encryption decision that Proton and classic PGP don't: it encrypts the entire mailbox — including subject lines, contacts, and calendar — not just the message body. It has also moved early on post-quantum cryptography. Because it controls its own encryption stack rather than inheriting PGP's constraints, it can ship improvements PGP can't easily make, like perfect forward secrecy. It's open source and GDPR-compliant.
Where Haven differs. The same decision that lets Tuta encrypt subject lines also makes it a walled garden: Tuta does not support PGP, which means you cannot exchange encrypted email with anyone using a standard PGP client on another service. Encrypted mail to outside recipients happens through password-protected links instead of true interoperable encryption. Haven took the open-standards path instead — OpenPGP for email, so encrypted mail interoperates with the wider PGP world, and MLS for chat, an IETF standard rather than a proprietary protocol. Tuta is also German, and therefore EU-jurisdiction; and like the others, it does email only — no integrated secure chat or encrypted file vault under the same identity.
Haven vs Signal
What Signal does well. Signal is the gold standard for secure messaging, full stop. The Signal Protocol is the most rigorously analyzed messaging cryptography in existence, it's a nonprofit with no advertising business model, and it minimizes metadata aggressively (sealed sender, no message history on servers). If your only need is encrypted real-time chat, Signal is excellent and you should use it.
Where Haven differs. Two things. First, Signal requires a phone number to register — that's still true as of 2025. The 2024 username feature hides your number from other users, but you still must supply a working phone number at signup, which is an identity anchor many at-risk users specifically need to avoid. Haven requires no phone number at all. Second, Signal does not do email — at all. For a journalist coordinating with a source, or a lawyer with a client, communication rarely fits neatly into "chat only." Haven puts encrypted email, MLS chat (built on the same lineage of forward-secret cryptography Signal pioneered), identity aliases, and an encrypted vault behind one identity and one passphrase.
The Honest Comparison
| Property | Haven | Proton | Tuta | Signal |
|---|---|---|---|---|
| Encrypted email | ✓ (PGP) | ✓ (PGP) | ✓ (own, not PGP) | ✗ |
| Secure real-time chat | ✓ (MLS) | ✗ | ✗ | ✓ (best in class) |
| PGP interoperability | ✓ | ✓ | ✗ | N/A |
| No phone number required | ✓ | ✓ | ✓ | ✗ (required at signup) |
| Encrypted file vault | ✓ | Separate app (Drive) | ✗ | ✗ |
| Identity aliases | ✓ | ✓ (paid) | Limited | ✗ |
| Confidential-VM server (operator can't read RAM) | ✓ | ✗ | ✗ | N/A |
| Tor onion access | ✓ | ✓ | ✗ | Via Orbot |
| Jurisdiction | Single, outside US, not published | Switzerland | Germany (EU) | United States |
| Free tier | Free forever, encryption not gated | Yes (limited storage) | Yes (limited storage) | Yes (donation-funded) |
Haven is younger and smaller than Proton, Tuta, and Signal. It's independent — no investors, no VC, run by a small operation rather than a large company or a well-funded nonprofit. That cuts both ways: no investor incentives pulling against users, but also not the decade of battle-testing and the large support team the others have. We think the architecture and the "one identity for email and chat" model are worth it. You should weigh that maturity trade-off honestly.
So Which Should You Use?
The honest routing, if you take nothing else from this:
- You only need secure chat, nothing else? Signal. It's the best at exactly that, and a phone number isn't a dealbreaker for you.
- You want a polished, mature email suite from a large team and you don't need integrated chat? Proton is the safe, well-supported pick.
- You want encrypted subject lines and you live entirely inside one provider? Tuta's walled-garden encryption is genuinely strong.
- You need encrypted email and chat under one identity, no phone number, with a server that physically can't read your data? That's the gap Haven was built to fill.
Privacy isn't a single product category, and the best tool depends on your actual threat model. If Haven isn't the right fit, one of these three very likely is — and that's a better outcome than choosing nothing.