How we make this list: we compare pricing pages, product documentation and public user reviews. Ratings come from G2, Capterra or Trustpilot, with the date we checked them.
Key takeaways
- Tuta is the closest rival: zero access encryption, a free tier, and paid plans from three euros a month.
- Mailbox.org and Posteo are the one euro a month Germans: standards based, green, and quietly excellent.
- StartMail centres PGP and disposable aliases for users who want classic encryption done simply.
- Mailfence adds documents, calendars and groups around encrypted mail in Belgium.
- Fastmail is the honest non encrypted option: superb mainstream mail that respects you without claiming zero access.
Quick comparison
| Tool | Best for | Starting price | Free plan |
|---|
 Tuta | Zero access encryption with a free tier | EUR 3/month | Yes |
 Mailbox.org | Standards based secure mail from EUR 1 | EUR 1/month | No |
 Posteo | Anonymous, green encrypted mail for EUR 1 | EUR 1/month | No |
 StartMail | PGP made simple, with aliases | See website | No |
 Mailfence | Encrypted mail plus office suite | See website | Yes |
 Runbox | Norwegian mail with a privacy record | See website | No |
 Fastmail | Excellent mainstream mail, honestly not zero access | $3/month | No |
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The best alternatives to Proton Mail in 2026
#1
Tuta
Best for: Zero access encryption with a free tier
Visit tuta.com
Starting priceEUR 3/month
Free planYes
Tuta (the service formerly called Tutanota) is the most direct Proton alternative in existence: a German provider running zero access encryption across mail, calendar and contacts, with open source clients and a free tier that real people use for years. Its paid plans undercut Proton's, starting at EUR 3 a month for the Revolutionary tier with custom domains and real storage.
The trade is the same trade Proton makes, sharpened: Tuta's encryption is its own system, so your mail does not flow through IMAP clients or standard PGP the way a Mailbox.org account does. Judge that by your habits: app based users will not feel it; protocol traditionalists should read the next two entries first. As a like for like encrypted home, Tuta is the first test.
What we like- End to end encrypted mail, calendar and contacts, with the provider unable to read them, free tier is genuinely usable
- Paid plans start at EUR 3 a month, encrypted search and an anonymous signup with no phone number, based in Germany, open source apps, with post quantum encryption work underway
Watch out for- Its own protocol: no IMAP or standard PGP interop with the outside world, importing a large old mailbox takes patience and tools, smaller ecosystem and polish gaps next to Proton's wider suite
Starting priceEUR 1/month
Free planNo
Mailbox.org is the grown up's provider: a Berlin company selling secure, standards based mail for EUR 1 a month upward, with PGP support for those who run their own encryption, encrypted storage options, and a small office suite in the account. It treats you as a customer with rights rather than a product or a suspect, and it publishes how it handles authority requests.
Its model differs from Proton's deliberately: this is trustworthy hosting with strong encryption options, where server side spam filtering and search keep working, rather than a zero access vault. For professionals who need mail that cooperates with the open internet's standards (clients, keys, calendars), Mailbox.org is often the final answer after the encrypted boutiques frustrate them.
What we like- Full standards support: IMAP, PGP and S/MIME for people who manage their own keys, mail, calendar, contacts and office documents under one account, German provider with a long privacy record and transparent reporting, plans start at EUR 1 a month
- No free tier games
Watch out for- No free plan, and the interface is functional rather than beautiful, zero access purists note server side features mean a different trust model than Tuta, setup rewards a user who reads settings pages
#3
Posteo
Best for: Anonymous, green encrypted mail for EUR 1
Visit posteo.de
Starting priceEUR 1/month
Free planNo
Posteo is privacy minimalism from Berlin: one euro a month buys encrypted mail, calendar and contacts from a company that does not know your name and runs on renewable power. You can pay by mailing cash. In an industry of claims, Posteo's whole design is the claim, and its restraint (no domains, no suite, no upsell theatre) is either its charm or its dealbreaker.
For a personal mailbox that owes nobody anything, Posteo is close to perfect. For a business identity on your own domain, it refuses on principle, and Mailbox.org, its near neighbour in every sense, is the practical German alternative. Many privacy minded users run both: Posteo for the personal vault, Mailbox.org for the domain.
What we like- EUR 1 a month, payable anonymously, even by cash in an envelope, no names required at signup: privacy as practice, not marketing, encrypted storage and transport, with calendar and contacts included, runs on green energy and refuses advertising entirely
Watch out for- No custom domain support, which ends the conversation for business users, no bundled suite ambitions: mail, calendar and contacts only, interface is plain to a fault
Starting priceSee website
Free planNo
StartMail serves the user who wants classic email encryption (PGP, the open standard) without a command line. It generates and manages keys for you, encrypts to PGP contacts, and hands you unlimited one off aliases so the address you give a shop is never your address. Being Dutch, it sits inside EU data law, which some switchers specifically want after Switzerland.
Its trust model is the honest middle: PGP where you use it, competent hosting where you do not, rather than zero access everywhere. Pricing runs above the budget Germans and is best confirmed on its site for the current annual figure. For the alias heavy, PGP friendly user, it is the most comfortable seat in this category.
What we like- Built by the Startpage search team in the Netherlands, PGP encryption made usable for normal people, unlimited disposable aliases protect your real address, works with standard clients and protocols better than the closed boutiques, clean, calm interface without suite sprawl
Watch out for- No free tier
- Pricing sits above the one euro Germans, server based PGP handling asks more trust than a zero access design, smaller feature surface than Proton's suite (mail is the product)
Starting priceSee website
Free planYes
Mailfence is the suite play from Belgium: OpenPGP encrypted mail at the centre, with documents, calendars and group tools around it, aimed at small teams and professionals who want one privacy respecting account instead of five services. Its browser based key handling makes PGP survivable for non technical colleagues, which is rarer than it should be.
It will not win a beauty contest against Proton or Fastmail, and its community is small. It wins a specific argument: standards based encryption plus office basics plus EU jurisdiction, in one account at modest prices listed on its site. Law firms and clinics with modest needs and real duties have found that argument persuasive for years.
What we like- Encrypted email with OpenPGP built in, plus documents, calendar and groups, Belgian provider under EU law, digital signatures and key management handled in the browser, free tier to start
- Paid tiers add storage and domains
Watch out for- Interface design trails the leaders by a generation, smaller user base means fewer guides and community answers, suite features are competent rather than best in class
Starting priceSee website
Free planNo
Runbox is the quiet veteran: operating from Oslo since the early web, powered by hydropower, protected by Norwegian law, and boring in the way you want a mail provider to be. It hosts domains, speaks every standard protocol, encrypts in transit and at rest on its side, and minds its own business, which for twenty years has been the entire pitch.
Set expectations by model: Runbox asks you to trust a well run company under a good legal system, not to verify a zero access design. For many switchers, especially those leaving Proton over protocol limits rather than trust, that is precisely the trade they came to make. Pricing is annual and listed on its site by storage tier.
What we like- Norwegian provider running on renewable energy, under Norway's strong privacy law, decades long record with no advertising and no data trade, full standards support: IMAP, POP and your own clients and keys, generous storage and domain hosting for the price
Watch out for- No zero access encryption story: this is trustworthy hosting, honestly labelled, interface is dated, though a modern client has been rebuilding it, no free tier beyond a trial
#7
Fastmail
Best for: Excellent mainstream mail, honestly not zero access
Visit fastmail.com
Starting price$3/month
Free planNo
Fastmail is on this list as the honesty test. It does not claim zero access, because it is not zero access: it is a superb, ad free, standards based email service that treats customers as customers, with aliases, domains and an interface every rival studies. A large share of Proton switchers discover their actual needs were respect, speed and their own domain, and land here happily.
If your threat model includes your provider or its government reading your mail, Fastmail fails it by design and you belong with Tuta. If your model is escaping advertising, tracking and a worse product, Fastmail at $3 a month is arguably the best email money on this page. Knowing which reader you are is the whole decision.
What we like- Arguably the best mainstream email experience sold today: fast, searchable, superbly designed, masked email aliases, custom domains and calendar and contacts done properly, Australian company with a long, transparent record, from $3 a month, standards based throughout
Watch out for- Not end to end encrypted: Fastmail can access your mail, and says so, Australian law includes data retention and access provisions privacy hardliners reject, no free tier
How we chose
Eligibility required an independent email provider with a genuine privacy posture: end to end or zero access encryption, or (stated openly) a respected ad free model on open standards. Gmail style advertising mail was excluded regardless of scale. Each entry states its encryption model and jurisdiction, because in this category those are the product. Prices checked October 2026: Tuta from EUR 3 a month with a free tier, Mailbox.org and Posteo from EUR 1, Fastmail from $3; providers whose pricing varies by tier or term say See website.
How to choose your encryption model
Match the model to the threat, in plain language. If you fear your mailbox being read after a breach or a compelled disclosure, zero access designs (Tuta, and Proton itself) are built for exactly that, and their protocol limits are the price. If you fear advertising profiling and sloppy handling, any paid provider here solves it. If you fear clumsy interoperability more than either, standards based hosts (Mailbox.org, StartMail, Runbox) keep your mail portable for life.
Think about your correspondents, because encryption is a two ended affair. Mail between users of the same closed system is protected end to end; mail to the outside world travels as ordinary email unless PGP is arranged at both ends. Nobody's grandmother is installing PGP. For most people, the meaningful wins are a provider that does not mine the inbox, encrypted storage, aliases that contain breaches, and two factor login, all available across this page.
Finally, plan the boring exit: your own domain. An address at your domain can move between Mailbox.org, Fastmail, Runbox and others in an afternoon, taking your identity with it. An address at a provider's domain is a tenant's address, however kind the landlord. Privacy veterans pay the few euros a year for the domain first and argue about providers second.
Frequently asked questions
What is the closest alternative to Proton Mail?
Tuta: the same zero access idea across mail, calendar and contacts, open source apps, a working free tier and paid plans from EUR 3 a month, based in Germany. The difference to feel before switching is interoperability: both are closed systems, and your mail habits must fit inside their apps.
Why do people want IMAP and PGP instead?
Because open standards outlive companies. An IMAP and PGP friendly provider (Mailbox.org, StartMail, Mailfence, Runbox) lets you use any client, hold your own keys and leave with everything working on day one elsewhere. Closed encryption boutiques protect you more completely inside their walls and cooperate less outside them. Neither is a trick; they are different philosophies with receipts.
Is email ever really private?
Metadata (who writes to whom, when, from where) is visible to providers and networks in almost every design, and mail to users on ordinary services leaves the encrypted world at the border. Zero access encryption protects content at your provider, which is a real and limited good. For genuinely sensitive communication, encrypted messengers exist for a reason; email privacy tools reduce exposure, they do not repeal the medium.
Which is cheapest?
Posteo and Mailbox.org at EUR 1 a month for real, full mailboxes, with Tuta's free tier the cheapest of all if its limits fit. At these prices the decision should be made on model and jurisdiction rather than money, because the difference between the dearest and cheapest serious option here is a coffee a month.
Can I use my own domain with these providers?
Yes at Tuta (paid tiers), Mailbox.org, StartMail, Mailfence, Runbox and Fastmail. Posteo is the exception, refusing custom domains on principle. If the domain matters, and for anyone building a long term address it should, that one line decides Posteo's place in your plans.
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Is your product missing or out of date?
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Shihab Mia · Founder, Rankite
Shihab has 5+ years in B2B and SaaS SEO. He writes Rankite's software buying guides from pricing pages, documentation and public user reviews. More about Shihab.