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Private.Ki Mail
What it is
Private.Ki Mail provides end-to-end encrypted email between Private.Ki users on web, iOS, and Android. Message bodies, subjects, and attachments are encrypted on the sender’s device before transmission and decrypted on the recipient’s device; each message displays encryption and signature checks. Mail to an outside provider is end-to-end encrypted when the recipient has a PGP key. Otherwise, it is delivered normally and marked as not end-to-end encrypted. The Free plan is free and includes one @private.ki address, web access, and attachments up to 25 MB per file, encrypted on the device before upload. Mail features include undo send with 5-, 10-, 20-, or 30-second windows, multiple signatures, search, and Inbox, Sent, Drafts, Archive, and Trash folders. Users can export their public key or import another person’s; PGP-compatible programs can encrypt mail to the service’s published public key. Security options include TOTP two-factor authentication and QR device pairing. The maker says its servers store ciphertext and delivery metadata, but no access or connection logs. It cannot recover a lost passphrase or protected key, and says there is no independent audit yet. Plus is planned at $5 a month, billed annually, and is not yet on sale.
For and against
For
- Encrypts messages on the sender’s device
- Shows encryption and signature checks per message
- Includes TOTP two-factor authentication
- Supports public key export and import
Against
- Free attachments are limited to 25 MB per file
- Lost passphrases and protected keys cannot be recovered
- No independent audit yet
- Plus is planned, not yet on sale
The verdict
Private.Ki Mail offers device-side encryption between its users and labels external mail that lacks end-to-end encryption. Consider the recovery limitation and audit status, as well as the attachment cap on Free.
Who it suits
Private.Ki Mail suits people seeking encrypted communication with other Private.Ki users across web and mobile. Users who need mail to outside providers should check whether recipients have PGP keys for end-to-end encryption.
Plans and prices
Plus
50 GB encrypted storage · up to 10 addresses and aliases · 100 MB attachments planned
Read 8 Oct 2026 · private.ki
Dedicated
Own Private.Ki server, managed by Private.Ki or run by the customer
Read 8 Oct 2026 · private.ki
Free
One @private.ki address · 25 MB attachments · standard paired-device allowance
Read 8 Oct 2026 · private.ki
Teams
Everything in Plus per seat · admin roster · central billing · company domain
Read 8 Oct 2026 · private.ki
On the record
- Account protection
- Account security includes TOTP two-factor authentication, QR device pairing and sessions bound to a device key using DPoP.private.ki · read 8 Oct 2026
- Attachment limit
- Attachments are limited to 25 MB per file on the current Free plan and are encrypted on the device before upload.private.ki · read 8 Oct 2026
- Audit status
- The company says it has no independent audit yet.private.ki · read 8 Oct 2026
- Encryption
- Mail bodies, subjects and attachments between Private.Ki users are encrypted on the sender’s device before transmission and decrypted on the recipient’s device.private.ki · read 8 Oct 2026
- End-to-end encryption
- Yesprivate.ki · read 15 Sep 2026
- External email
- Mail to outside providers is encrypted when the recipient has a PGP key; otherwise it is delivered normally and flagged as not end-to-end encrypted.private.ki · read 8 Oct 2026
- Features
- Mail includes undo send for 5, 10, 20 or 30 seconds, multiple signatures, sender and subject search, and Inbox, Sent, Drafts, Archive and Trash folders.private.ki · read 8 Oct 2026
- Integrations
- Users can export their public key or import another person’s public key, and any program that speaks PGP can encrypt mail to Private.Ki’s published public key.private.ki · read 8 Oct 2026
- Intended audience
- The maker describes Teams as intended for organisations and offers a Dedicated deployment on a customer’s own server.private.ki · read 8 Oct 2026
- Metadata
- The maker says its servers store ciphertext and necessary delivery metadata, including usernames, recipients and approximate storage times; it says it keeps no access or connection logs.private.ki · read 8 Oct 2026
- Product
- Private.Ki Mail provides end-to-end encrypted email between Private.Ki users, with message encryption and signature checks shown for each message.private.ki · read 8 Oct 2026
- Recovery limit
- Private.Ki says it cannot recover a lost passphrase or the key it protects.private.ki · read 8 Oct 2026
- Security
- The maker identifies Ed25519 device-generated keys, AES-256-GCM message encryption, OpenPGP packaging and OPAQUE sign-in among its cryptographic components.private.ki · read 8 Oct 2026
- Support
- The pricing page lists documentation and email support for Free and priority support for Plus; its help center contains product guides and how-to articles.private.ki · read 8 Oct 2026
