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Last checked October 2026

QeyeT Quantum vs Proton, Tuta, Gmail, Yahoo and Outlook

Quantum is QeyeT’s end-to-end encrypted account: keys are made and kept on your devices, and you sign in with six recovery words. Here is how it compares, with sources.

Sign up for Quantum freeClassic vs competitors

Why Quantum

  • Keys on your devices. Mail between QeyeT addresses is encrypted before it leaves your device.
  • No phone number and no password. You sign in and recover with six recovery words.
  • Free during preview, with no credit card. Proton Mail and Tuta also have free end-to-end encrypted plans, with up to 1 GB.
  • Mail, chat, calendar and contacts in one app, on the web and Android, and it still emails Gmail, Outlook and everyone else.
  • No ads. Free Gmail, Yahoo Mail and Outlook.com show ads.
Straight talkQuantum has no IMAP; you use the QeyeT Mail app. Mail to people outside QeyeT travels as normal internet email, like with any provider. Proton and Tuta are mature, audited services with paid tiers; Quantum is in preview. Want your mail in Outlook or Apple Mail? Choose Classic.
ServiceEnd-to-end encryptionFree planEntry paid planAdsOther mail apps
QeyeT QuantumYes, between QeyeT addresses; keys on your devicesFree during previewNone yetNoneNo; QeyeT Mail web and Android app
Proton MailYes, between Proton users, plus zero-access storageUp to 1 GBMail Plus, 15 GB: $4.99/monthNonePaid plans, through Bridge
TutaYes, between Tuta users, plus password-protected mail1 GBRevolutionary, 20 GB: €3/monthNoneNo IMAP
GmailNo by default (S/MIME on some Workspace plans)15 GB shared100 GB: $1.99/monthFree Gmail shows adsYes
Yahoo MailNo20 GBMail Plus: $5/monthFree plan shows adsYes
Outlook.comNo by default (Microsoft 365 adds message encryption)15 GB mailboxMicrosoft 365 Basic: $19.99/yearFree plan is ad-supportedYes

Sources

Prices are US list prices from each provider's official page, last checked October 26, 2026. Taxes, promotions and regional prices vary; check the provider before you buy. Corrections: support@qeyet.com.