Dana has had the same Gmail address since university. Last month she searched for a divorce lawyer on her phone, and for the rest of the week her inbox showed her ads for mediation services and “fresh start” apartments. Nobody read her email. Google says it does not scan Gmail messages to pick ads, and there is no reason to doubt it. What it does do is show ads based on what you do while you are signed in to Google, and she is signed in all day. The inbox is free because she is the audience. That is the moment most people start typing “gmail alternatives” into a search box.
This is a fair look at six of them, from their own public pages. Each does something well. They differ on where the servers are, what is encrypted, and how the company gets paid. Five of the six run on a familiar model: a password on the account, a spam filter guessing at what you want, and everything else landing in your Inbox. One does not, and that is the difference to watch for at the end.
Why “free” email is the thing you are leaving
A free inbox is funded by advertising, and advertising is funded by attention. Google’s own help page says Gmail ads are selected using your activity while signed in to Google, and that you can turn off ad personalisation but will still see ads. That is not a scandal; it is the deal. The point of switching is to become the customer instead of the audience: you pay a small amount, or use a free tier that a paying user base subsidises, and the company’s incentive lines up with yours.
Proton Mail
Proton is the best-known name on this list. It is based in Switzerland, encrypts mail end to end between Proton users, and stores your mailbox with what it calls zero-access encryption, meaning Proton itself cannot read stored messages. It has a free plan with 1 GB of storage and paid plans above it. Proton does encryption well and explains it clearly, and it now comes with a calendar, drive and VPN if you want a whole suite from one company.
Where it is like Gmail: your account has a password, spam is handled by a filter, and any sender who has your address can put mail in your Inbox.
Tuta
Tuta, formerly Tutanota, is a German provider that encrypts the whole mailbox end to end, including subject lines, and was the first to add post-quantum encryption to email. It does not ask for a phone number at signup and says it does not log IP addresses by default. There is a free tier, open-source apps for every platform, and paid plans with custom domains.
Tuta’s strength is that it encrypts more of the message than most, and does it in the open. The trade-off is the same one every encrypted provider makes: mail to someone outside Tuta is only encrypted if you share a password with them first. And the account itself is opened with a password.
Fastmail
Fastmail is an Australian company that has sold email for over twenty years. It has no free tier and shows no ads, and its privacy page puts it plainly: your data is for you and no one else. It supports standard IMAP, custom domains, and a masked-email feature for signing up to sites with a throwaway address. It is the pragmatic choice for someone who wants a fast, conventional inbox from a company whose only revenue is subscriptions.
Fastmail does not end-to-end encrypt stored mail, which it is open about. It is a private business model, not an encryption product.
Posteo
Posteo is a small Berlin company that has run on green energy since 2009, takes no personal details at signup, and lets you pay anonymously. It is ad-free, financed entirely by its users, and offers encryption of the whole mailbox at the press of a button, plus a free migration service that copies your old mailbox across. It has published a transparency report on government requests since 2014.
Posteo also offers passkey login, which is good to see. A password still exists on the account alongside it, which matters for the next section.
Mailfence
Mailfence is a Belgian service built around OpenPGP, with a keystore in the web client, digital signatures, and a full suite of calendar, contacts and documents. It sits under Belgian privacy law and publishes a transparency report. It is aimed at people who want standards-based encryption they can verify themselves rather than a proprietary system.
Like the others, it authenticates with a password and sorts spam with a filter.
OptMsg
OptMsg is the one on this list built on a different idea of what an inbox is for. It is private email for personal use, and it starts from the same place as the others: OptMsg does not scan your emails to sell ads, and we don’t collect your personal data to sell to advertisers. Messages between OptMsg addresses are encrypted at rest and in transit while they stay on OptMsg infrastructure; mail you send to a Gmail or Outlook address is handled by that provider under its rules, as it would be from any service here.
The structural difference is on the way in. Every other service on this page delivers to your Inbox by default and asks a filter to guess what you do not want. OptMsg’s patent-pending opt-in technology reverses that: only people you approve can reach your Inbox. Everyone else goes to Trash, where messages sit for 30 days before they are auto-deleted, so you can check that folder and rescue anything you want. If many other OptMsg users have approved a sender you have not, a Community Recommendation flags the message so it does not slip past you.
The second difference is the account itself. Your OptMsg account has no password, so a password stolen from another site can’t open your inbox. Sign-in uses passkeys. When another company gets breached, the login they leak isn’t the login to your inbox, and since your email is how most accounts get reset, keeping that door shut keeps the rest shut with it. This is a statement about the design of one account, not about anyone else’s security.
How to choose
If you want the strongest encryption story, Proton or Tuta. If you want a conventional, fast inbox from a subscription business, Fastmail. If you want to leave the smallest trace and pay anonymously, Posteo. If you want open PGP standards, Mailfence. If what wore you out was not the ads but the daily sorting, and you want to decide who reaches your Inbox instead of filtering after the fact, create an OptMsg account and try it with your existing mail forwarded in. For a closer look at the two, see Gmail vs OptMsg and what opt-in email means.
Whichever you pick, you stop being the product the day you become the customer.
Create Your Account. Your Inbox. Your Rules.
Frequently asked questions
Does Gmail read your emails to show you ads? Google’s help page says it does not scan or read Gmail messages to show ads. Ads in Gmail are chosen from your activity while signed in to Google. You can turn off ad personalisation in Ads Settings, but you will still see ads.
What is the most private Gmail alternative? It depends on what “private” means to you. Proton and Tuta lead on end-to-end encryption; Posteo lets you sign up and pay without giving personal details; Fastmail and Mailfence run ad-free subscription businesses. OptMsg is different in kind: it is opt-in. Only people you approve can reach your inbox. Everyone else goes to Trash.
Can I move my old email to a new provider? Most providers on this list offer an import or migration tool. Posteo has a built-in migration service, and Fastmail and Proton import from Gmail. With OptMsg you can forward your existing address to your new one and read it there.
Is a paid email service safer than a free one? Paying changes the incentive: the company answers to you rather than to advertisers. It does not by itself change how the account is secured. Look separately at what is encrypted and how you sign in.
What makes OptMsg different from encrypted providers like Proton? Proton and Tuta protect the contents of your mail with encryption. OptMsg controls who gets into your Inbox in the first place, and has no password on the account for a leaked credential to match. They solve different problems.
