Proton Mail Alternatives 2026: 5 Options, 4 Free
Proton Mail alternatives: Tuta, Zoho Mail, Gmail, Fastmail and 1 more. Prices and licenses checked October 25, 2026.
•3 min read•Passwords, Privacy & Identity
Verdict:Proton Mail's free plan is small: 500 MB at the start, rising to 1 GB once you finish a setup checklist. Mail Plus is $3.99 a month billed annually, and Proton Unlimited is $9.99. If you want to leave because of space, Gmail gives 15 GB free and Zoho Mail gives 5 GB per user for up to five people on your own domain, which Proton's free tier does not allow. If you want to keep encrypted mail but pay less, Tuta's free plan has 1 GB, one calendar and three labels, which is the nearest like-for-like swap. The cost is that Tuta, like Proton, has no custom domain on the free tier. Fastmail is a different bet: no free plan, $5 per user a month billed annually, but custom domains and a plain mail focus, with a trial of up to 30 days. iCloud Mail makes sense only if you already use Apple devices. The trade-off is privacy against capacity. Gmail and Zoho are more generous in space and domain support, while Proton and Tuta keep the encryption model. Moving also means exporting mail and updating every account that sends to your old address, so keep Proton active for a few months while you switch.
Quick comparison
| Tool | Price | Platforms | Best for | Tested |
|---|---|---|---|---|
| Tuta | Free (1 GB storage, 1 calendar, 3 labels, no custom domain) | Web, iOS, Android | Encrypted free mailbox | Docs only |
| Zoho Mail | Free (Forever Free: up to 5 users, 5 GB mail storage per user, one domain) | Web, iOS, Android | Free custom-domain mail for a small team | Docs only |
| Gmail | Free (No-cost plan with 15 GB pooled storage per user) | Web, iOS, Android | Maximum free storage | Docs only |
| Fastmail | Paid from $3 per user/month, 12-month prepay (Basic business plan; Individual $5, monthly billing $4 to $6) | Web, iOS, Android | Paid mail-only service | Docs only |
| iCloud | Free (5 GB free); paid from $0.99 per per month, iCloud+ 50 GB plan (200 GB $2.99, 2 TB $9.99) | iOS, macOS, Windows, Web | Apple device owners | Docs only |
| StartMail | Paid from $4.99 per month (Personal; $59.88 billed annually) | Web browser | Docs only |
Independent comparison. Paid placements are labelled separately; editorial links earn no affiliate commissions. Learn more.
Good fit if
- You need far more free storage (Gmail is the pick)
- You want encrypted mail but a different vendor (Tuta is the pick)
- You run a small team on your own domain for free (Zoho Mail is the pick)
- You want paid mail with custom domains and no free-plan limits (Fastmail is the pick)
Not ideal if
- You rely on Proton Mail features or integrations that these tools do not replicate
Proton Mail today: Free (Up to 1 GB (500 MB at start, rising to 1 GB after a setup checklist)); paid from $3.99 per month, billed annually (Mail Plus; $47.88 every 12 months) (Proton Mail pricing, checked 2026-10-23).
Why people look for Proton Mail alternatives
Proton Mail's Free plan holds 1 GB (500 MB at start), one address, three folders, three labels, one custom filter and 150 messages a day, with no custom domain. Mail Plus costs $3.99 per month billed annually (the page lists $4.99 standard) for 15 GB, 10 addresses and one domain. Proton Mail Bridge, which connects desktop email clients, requires a paid plan.
Tuta
Compared with Proton Mail: Tuta has a free plan with 1 GB storage, one calendar and three labels, compared with Proton's free 1 GB. It also encrypts mail, but the free plan has no custom domain, which matches Proton's free limits.
Price: Free (1 GB storage, 1 calendar, 3 labels, no custom domain) (Tuta pricing, checked 2026-10-23).
Platforms and license: Web, iOS, Android. Proprietary.
Best for: Encrypted free mailbox.
Zoho Mail
Compared with Proton Mail: Zoho Mail's Forever Free plan gives up to 5 users 5 GB each on one domain, far more than Proton's free tier. You lose Proton's end-to-end encryption focus and gain a custom domain without paying.
Price: Free (Forever Free: up to 5 users, 5 GB mail storage per user, one domain) (Zoho Mail pricing, checked 2026-10-23).
Platforms and license: Web, iOS, Android. Proprietary.
Best for: Free custom-domain mail for a small team.
Gmail
Compared with Proton Mail: Gmail is free with 15 GB pooled storage per user, 15 times Proton's free 1 GB. Google can process your mail, so you trade Proton's privacy stance for space and integration.
Price: Free (No-cost plan with 15 GB pooled storage per user) (Gmail pricing, checked 2026-10-23).
Platforms and license: Web, iOS, Android. Proprietary.
Best for: Maximum free storage.
Fastmail
Compared with Proton Mail: Fastmail has no free plan; Standard costs $5 per user a month billed annually, against Proton Mail Plus at $3.99. You pay more for a mail-first product with custom domains and a trial of up to 30 days.
Price: Paid from $3 per user/month, 12-month prepay (Basic business plan; Individual $5, monthly billing $4 to $6) (Fastmail pricing, checked 2026-10-23).
Platforms and license: Web, iOS, Android. Proprietary.
Best for: Paid mail-only service.
iCloud
Compared with Proton Mail: iCloud Mail comes with the free 5 GB iCloud account, and paid storage starts at $0.99 a month. It suits Apple users who want less setup but gives up Proton's encryption and non-Apple apps.
Price: Free (5 GB free); paid from $0.99 per per month, iCloud+ 50 GB plan (200 GB $2.99, 2 TB $9.99) (iCloud pricing, checked 2026-10-23).
Platforms and license: iOS, macOS, Windows, Web. Proprietary.
Best for: Apple device owners.
Other popular options (paid)
StartMail
Compared with Proton Mail: Personal is $4.99 a month ($59.88 billed annually) with 20 GB and unlimited aliases, against Proton Mail Plus at $3.99 monthly billed annually. There is no free plan, only a 7-day trial that needs a card or PayPal.
Price: Paid from $4.99 per month (Personal; $59.88 billed annually) (StartMail pricing, checked 2026-10-25).
Which one to pick
- You need far more free storage: Gmail
- You want encrypted mail but a different vendor: Tuta
- You run a small team on your own domain for free: Zoho Mail
- You want paid mail with custom domains and no free-plan limits: Fastmail
Limits of this review
Docs-only for Tuta, Zoho Mail, Gmail, Fastmail, iCloud: we did not install or run them, so feature claims come from vendor pages and we did not test import from Proton Mail. Vendor prices and free limits change; confirm on the linked pricing page before you buy or migrate.
Related guides
Sources
Kevin Fan
Kevin Fan is a SaaS founder. He runs Free Instead Of, which tracks free and open-source alternatives to paid software and checks each price and free-plan limit against the vendor's own pages.
Methodology
Based on official pricing and product pages checked between 2026-10-23 and 2026-10-25: Proton Mail, Tuta, Zoho Mail, Gmail, Fastmail, iCloud, StartMail. Prices, free limits and licenses are the figures shown on those pages on those dates. No tool on this page was installed or run. No accounts were created.