A free email account is still the key to most of your online life: it is where password resets land, where banks and delivery firms send notices, and often the login name for everything else. The free services look alike at first glance, but they differ in ways that matter later: how much storage you really get, whether that storage is shared with your photos, whether the provider can read your mail, what happens if you stop logging in, and whether you can use your own domain. This guide compares eight well-known free services using each provider's own help pages, pricing pages and terms. NerdBible did not open accounts to measure anything; where a provider does not publish a figure, we say so rather than guess.
The quick answer
- Best for privacy: Proton Mail or Tuta. Both encrypt stored mail so that, by their own description, the provider cannot read it, and neither relies on advertising.
- Best for storage: GMX and mail.com, which each advertise 65GB of email storage on the free plan, though both have strict inactivity rules.
- Best for Google and Android users: Gmail, if you accept that its 15GB is shared with Google Drive and Google Photos.
- Best for Microsoft users: Outlook.com, which keeps a separate 15GB mailbox apart from your 5GB of Microsoft cloud storage.
- Best for Apple users: iCloud Mail, built into every Apple device, with a small 5GB free allowance shared with backups and photos.
- Best for a free address on your own domain: Zoho Mail's Forever Free plan, aimed at small businesses with up to five users.
Comparison table
| Service | Free storage | Ads in the free inbox | Provider-proof encryption by default | Own domain on the free plan | Inactivity rule for free accounts |
|---|
| Gmail | 15GB, shared with Drive and Photos | Yes, not based on your email content | No (TLS in transit) | No, needs paid Google Workspace | Account unused for 2 years may be deleted |
| Outlook.com | 15GB mailbox; attachments also count toward 5GB cloud storage | Yes | No; encryption is listed as a subscriber feature | No | Sign in at least once every 2 years |
| Proton Mail Free | 500MB, up to 1GB after setup tasks | No ads; funded by subscribers | Yes: zero-access storage, end-to-end between Proton users | No | Use it at least once every 12 months |
| Tuta Free | 1GB | No | Yes, including subject lines | No | Deleted after more than 6 months without login |
| iCloud Mail | 5GB, shared with backups, Photos and Drive | None mentioned by Apple | No, not even with Advanced Data Protection | No, needs iCloud+ | No figure found in Apple's help pages |
| Yahoo Mail | 20GB | Yes, removed with Yahoo Mail Plus | Not documented | Not listed | Mailbox inactive after 12 months and its contents deleted |
| Zoho Mail Forever Free | 5GB per user, up to 5 users | No | Not by default | Yes, one domain (required) | Inactive after 180 days; data deleted after 300 days |
| GMX / mail.com | 65GB of email storage | Yes, removed with paid plans | Optional PGP (GMX) | No, but mail.com offers 100+ domain names to pick from | GMX may delete messages after 6 months; address may be released after 1 year |
Gmail
Every Google Account includes up to 15GB of storage, but Google says it is "shared across Gmail, Google Drive, and Google Photos" (Google One Help), so a phone that backs up photos can fill your inbox's space. If you stay over quota for two years, Google says your content may be removed, with at least three months' notice. The attachment limit for personal accounts is 25MB; anything bigger is turned into a Google Drive link (Gmail Help). Google warns you may hit a sending limit if you email more than 500 recipients in one message or send more than 500 emails in a day (Gmail Help).
Gmail shows ads, but Google states: "We will not scan or read your Gmail messages to show you ads," and you can switch off ad personalisation (Gmail Help). Mail is protected in transit with TLS when the other provider supports it, and a red open padlock marks an unencrypted message (Gmail Help). Google can still technically access stored mail; Gmail is not end-to-end encrypted. A Google Account unused for two years counts as inactive under Google's policy and may be deleted (Google Account Help). Using your own domain requires a paid Google Workspace plan (Google Workspace).
Outlook.com
Microsoft gives free accounts "15 GB of free Outlook.com email storage, which is separate from your Microsoft cloud storage," plus 5GB of cloud storage shared across OneDrive, Outlook.com attachments and Microsoft 365 apps (Microsoft Support). The attachment limit is 25MB, and Microsoft says sending limits "will be lower for non-subscribers" without publishing the free figure (Microsoft Support).
The free version shows ads. Microsoft says it analyses emails from commercial senders to personalise ads but does "not analyze the content of emails from your friends, family, or other individuals" for that purpose (Microsoft Support). A Microsoft 365 subscription removes the ads and adds 100GB of mailbox storage, advanced phishing and malware protection and message encryption (Microsoft Support). To keep the account, sign in at least once in every two-year period (Microsoft Support).
Proton Mail (free)
Proton Free comes with 500MB of mail storage, which you can raise to 1GB by completing a getting-started checklist, and one address. Custom domains are a paid feature, and Proton says it is "funded entirely by paying subscribers" (Proton pricing). Messages between Proton accounts are end-to-end encrypted; mail you send to Gmail or Outlook users is not, unless you use Proton's password-protected email option. Stored mail uses zero-access encryption, which Proton describes as meaning "nobody else can access your emails, not even Proton." Subject lines are not end-to-end encrypted, for compatibility with the OpenPGP standard (Proton Support). A free account must be used at least once a year: Proton may delete one that has been inactive for more than 12 months, after reminder emails (Proton Support).
Tuta (free)
Tuta's free plan has 1GB of storage, one address, no custom domain, three labels and a 25MB attachment limit, and the service is ad-free (Tuta pricing). Tuta says it encrypts mailbox data end to end, "even email headers and metadata such as subject lines," and that it does not ask for a phone number at sign-up (Tuta). The catch is the strictest inactivity rule here: "Free accounts are deleted if you do not log in for a period longer than six months," and deleted addresses are not recycled for new users (Tuta FAQ).
iCloud Mail
An Apple Account starts with 5GB of iCloud storage, shared across Mail, device backups, Photos and iCloud Drive; if it fills up, you cannot send or receive iCloud mail. Apple publishes clear limits: 1,000 messages a day, 1,000 recipients a day, 500 recipients per message, and a 20MB message size, up to 5GB with Mail Drop (Apple Support). Apple states that "iCloud Mail does not use end-to-end encryption because of the need to interoperate with the global email system," even with Advanced Data Protection switched on (Apple Support). Custom email domains (Apple Support) and Hide My Email random addresses (Apple Support) are iCloud+ features, so they need a paid plan.
Yahoo Mail
Yahoo now includes "20 GB of free storage with every account." When a mailbox is full you cannot send or receive, and mail sent to you in the meantime is lost (Yahoo Help). Attachments are limited to 25MB per message, incoming and outgoing (Yahoo Help). Yahoo's inactivity rule is aimed at the mailbox itself: "If you don't access your Yahoo Mail mailbox for 12 months, it becomes inactive," and its emails, folders and contacts are permanently deleted, after reminders at 90, 60 and 30 days (Yahoo Help). The paid Yahoo Mail Plus removes most ads, adds disposable addresses and stops inactivity deletion (Yahoo Help).
Zoho Mail (Forever Free)
Zoho's free plan is different from the rest: it is business email for a domain you already own. It covers up to five users with 5GB of mail storage each and "custom email for one domain," with web and mobile app access but no IMAP, POP or ActiveSync, so you cannot use it in a desktop mail program. Zoho says the plan is available only in select data centres, and promises "We will never serve you ads" (Zoho Mail pricing). A free personal account unused for 180 consecutive days is marked inactive, and Zoho's policy table says its data is permanently deleted after 300 days (Zoho Mail Help).
GMX and mail.com
GMX advertises 65GB of email storage, attachments up to 50MB and up to 10 alias addresses on its free account, plus optional PGP encryption (GMX). mail.com offers the same 65GB of email storage, 30MB attachments, up to 10 addresses, 2GB of cloud storage and a choice of more than 100 domain names, and says users can upgrade to remove ads (mail.com). GMX's terms let it delete stored messages "after a period of 6 months of inactivity (no login via web browser or email program) without warning," and release your address to other customers after a year (GMX terms). We did not find an equivalent clause in mail.com's terms, so check before relying on it.
How to choose
If privacy matters most
Pick Proton Mail or Tuta. Remember that end-to-end encryption only fully applies when both sides use the same service or a compatible method; a message you send to an ordinary inbox is protected in transit, not end to end. Apple says iCloud Mail is encrypted in transit and on its servers with keys Apple holds, and Gmail relies on TLS in transit rather than end-to-end encryption, so with these services stored messages are not hidden from the provider itself.
If you need space
GMX and mail.com offer the most email storage. Gmail and iCloud look generous until photos and backups share the same pool. Yahoo's 20GB is described as mail storage.
If you live in one ecosystem
The service tied to your phone or office software is usually the least friction: Gmail on Android, iCloud Mail on Apple devices, Outlook.com with Windows and Microsoft 365.
If it is for a business
A free address on a big provider's domain is fine for a side project, but customers trust an address on your own domain. Zoho's Forever Free plan is the only option here that allows that without paying, with the limits noted above.
How to secure a free mailbox
- Turn on two-step sign-in. The FTC notes that a second factor makes it "harder for scammers to log in to your accounts if they do get your username and password" (FTC). An authenticator app is stronger than a text code.
- Use a passkey where offered. Google says passkeys "can't be shared, copied, written down, or accidentally given to someone else," which makes them more resistant to phishing (Google Account Help).
- Keep recovery options current. A recovery phone number or secondary address is how you get back in after a lost password; check it once a year.
- Use aliases for sign-ups. GMX and mail.com include alias addresses on the free plan; Apple and Yahoo offer masked or disposable addresses on paid plans. An alias that starts receiving spam can simply be deleted.
- Learn the phishing signs. The FTC lists generic greetings, claims of account or billing problems and requests to click a link to update payment details as red flags, and asks people to report phishing emails to reportphishing@apwg.org.
- Log in regularly. Several free plans delete inactive accounts, and the address you lose may be the one your bank uses.
When a paid plan is worth it
Pay when the free plan's limits start to cost you something: when storage is full and mail is bouncing, when you want your own domain, when you need to remove ads, or when an inactivity rule puts an important address at risk. For most people the first paid tier of the service they already use is the simplest step, because it keeps the same address. If you are moving for privacy, start the new account on a free plan, forward your old mail for a few months, and update important logins before you close the old inbox.
