What are the most used email providers in 2026?

How "most used" is measured

There is no reliable public ranking of email providers by users. Google is the only large provider that has published a recent user count for its mail service. Microsoft, Yahoo, and Apple publish none. The figures that circulate online, such as "Yahoo Mail has 225 million users" or "iCloud has 850 million", trace back to no primary source.

So this guide uses what can be checked: company statements where they exist, regulatory filings, and web traffic estimates from Similarweb, with each labelled for what it is. The order below reflects those signals. It is not a precise count.

The short version

Sources for each row are in the sections below.

Gmail

Google said in January 2026 that "3 billion users rely on Gmail." (Google) Similarweb estimates about 9 billion visits to mail.google.com over three months in mid-2026, roughly nine times Outlook.com's web traffic, and that excludes the apps. (Similarweb)

• Storage. 15 GB free, shared across Gmail, Google Drive, and Google Photos. A 100 GB Google One plan is $1.99 a month. (Google One) Larger plans are now bundled with Google's AI features and have been repriced more than once in 2026, so check the plans page for current figures.
• Inactivity. Google may delete a personal account after two years without activity anywhere on Google, with warning emails first. (Google help)
• What changed. Gemini summaries and writing help are now built in, with some features limited to paid AI plans. (Google) US users can now change their @gmail.com address, keeping the old one as an alias. (TechCrunch) Google is also retiring Gmailify and the option to pull mail from other accounts over POP, with existing users keeping access until January 2027. (Google help)

Gmail's real constraint is the shared 15 GB. Photos and Drive files compete with mail for the same space, and a mailbox that has never been cleaned is often the largest single user of it. We cover this in does email count toward Google storage.

Outlook.com

Microsoft's free consumer mail, which includes old Hotmail and Live addresses. Microsoft does not publish a user count. Similarweb puts outlook.live.com at about 968 million visits over three months, close to Yahoo Mail. (Similarweb)

• Storage. A 15 GB mailbox, plus 5 GB of cloud storage shared with OneDrive. Attachments count against the 5 GB, not the 15. (Microsoft support)
• Paid plans. Microsoft 365 Basic is $1.99 a month and raises the mailbox to 100 GB with no ads. Personal is $9.99 a month with 1 TB of cloud storage and the Office apps. (Microsoft, Microsoft)
• Inactivity. A Microsoft account must be signed in to at least once every two years. An active subscription keeps it open. (Microsoft support)

See Outlook mailbox full at 15 GB if you are near the limit.

Yahoo Mail

Yahoo publishes no user count. Its web traffic is similar to Outlook.com's, with more than half of it from the United States. (Similarweb)

• Storage. 20 GB free in the US, down from the 1 TB Yahoo offered for years. Over the limit, you cannot send or receive. (Yahoo help) A 100 GB add-on is $1.99 a month and 1 TB is $9.99 a month. (Yahoo)
• Inactivity. A mailbox not opened for 12 months has its contents deleted, with reminders at 90, 60, and 30 days. Signing in to Yahoo without opening the mailbox does not count. (Yahoo help)
• What changed. Besides the storage cut, Yahoo added Planner in March 2026, an AI feature that turns emails into calendar entries and to-dos. (Yahoo)

The storage change is covered in Yahoo Mail cut free storage from 1 TB to 20 GB.

iCloud Mail

Every iPhone, iPad, and Mac comes with an iCloud account, and most come with an @icloud.com address. Apple publishes no count of mail users.

• Storage. 5 GB free, shared with photos, device backups, and everything else in iCloud. In practice, mail often has the least room of any provider here. iCloud+ starts at $0.99 a month for 50 GB and adds Hide My Email, which creates a separate address for each site you sign up to. (Apple support)
• Inactivity. Apple's terms allow it to close an account after one year of inactivity, with 30 days' notice. (iCloud terms)

Apple's larger role is as an app. Litmus measured Apple's mail apps at about 62 percent of tracked email opens in July 2026, against 27 percent for Gmail. (Litmus) That measures where mail is read, not which provider holds it, and Apple's Mail Privacy Protection inflates the figure by loading images automatically.

AOL Mail

AOL is no longer part of Yahoo. Bending Spoons, the Italian company that also owns Evernote and Vimeo, completed its purchase of AOL in January 2026. (SEC filing) At the announcement, AOL had about 8 million daily and 30 million monthly active users. (Yahoo Finance) Addresses and logins did not change. (AOL legal FAQ)

• Inactivity. Sign in at least once every 12 months or the mailbox and its contents are deleted. (AOL help) Details are in does AOL delete your email if you don't sign in.

The full story is in the rise and fall of AOL email.

GMX and mail.com

GMX and WEB.DE are among the largest mail providers in Germany, and mail.com is their sister brand for an international audience. Their owner, United Internet, reported 42.03 million accounts at the end of 2025, of which 3.35 million were paid. (United Internet annual report)

• Storage. GMX advertises up to 65 GB of email storage. (GMX)
• Inactivity. The strictest here. GMX's terms allow deleting messages after six months without use, and releasing the address to someone else after a year. (GMX terms)

Privacy-focused providers

Proton Mail, based in Switzerland, encrypts mail so that Proton cannot read it. Proton reported over 100 million accounts in 2023, a figure that covers all its services, not mail alone. (Proton) The free plan includes 500 MB of mail storage, raised to 1 GB after setup steps. Paid plans start with Mail Plus at 15 GB. (Proton) Free accounts unused for 12 months may be deleted, with notices at 30, 15, and 7 days. (Proton terms)

Tuta, formerly Tutanota, is a German encrypted provider claiming over 10 million users. The free plan has 1 GB, and paid plans start at 20 GB. (Tuta)

Zoho Mail is best known for business email. Its free plan is limited to 5 GB per user and does not support IMAP or POP, so it works only in Zoho's own apps. (Zoho)

Paid-only providers

Two smaller providers charge from the first day and show no ads.

• Fastmail: from $5 a month billed annually, with 60 GB. (Fastmail)
• HEY, from 37signals: $99 a year with 100 GB, built around screening first-time senders before they reach the inbox. (HEY)

Choosing between them

• If you use Android or Google services, Gmail is the default, and its spam filtering and search are the strongest. Watch the shared 15 GB.
• If you use Office or Windows, Outlook.com keeps the mailbox separate from cloud storage, which makes 15 GB go further.
• If you want the most free space for mail alone, Yahoo's 20 GB and GMX's 65 GB lead, though GMX's six-month inactivity rule needs watching.
• If you are on an iPhone, iCloud Mail works with no setup, but 5 GB shared with photos fills quickly. Hide My Email is the strongest reason to pay for iCloud+.
• If privacy matters most, Proton and Tuta encrypt your mail, but the free tiers are small and suited to light use.

Whichever you choose, the mailbox fills the same way: a few dozen senders account for most of the mail. Inbox Scrub shows which senders those are in a Gmail account and clears them out sender by sender, unsubscribing on the way. Other providers will follow.