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FlowCrypt
FlowCrypt · Prague, Czech Republic · founded 2015
What it is
FlowCrypt is an email encryption service offered as a Chrome extension, with other platforms and a mobile application also listed. It lets users send encrypted messages to OpenPGP users or password-protected messages to other recipients. Recipients can securely reply without installing a plugin. A free plan is available for fewer than 100 users; its plan details list a 5 MB attachment threshold, while product details say free users can add attachments up to 25 MB. Enterprise pricing requires contacting FlowCrypt, and Enterprise supports domains with more than 100 users. Administrators can set domain-wide settings and restrictions, including rules for passphrases, keys and signing. Enterprise supports SSO through Google, OIDC providers and delegated identity providers, and can integrate with public key servers, HSMs and internal systems. FlowCrypt says its enterprise data processing agreement complies with GDPR and Enterprise support includes an SLA for availability and response times for fixes and patches. The maker is headquartered in Prague, Czech Republic.
For and against
For
- Recipients can reply securely without installing a plugin.
- Enterprise administrators can configure domain-wide restrictions.
- Enterprise supports SSO through multiple identity-provider options.
- Enterprise can integrate with public key servers and HSMs.
Against
- The free plan is for fewer than 100 users.
- Free-plan details list a 5 MB threshold, while product details say attachments up to 25 MB.
- Enterprise commercial pricing requires contacting FlowCrypt.
- The listed browser extension platform is Chrome.
The verdict
FlowCrypt offers encrypted messaging and secure recipient replies, with administrative controls and identity options for Enterprise. The free plan has a user threshold, and larger-domain commercial pricing is available by contacting FlowCrypt.
Who it suits
FlowCrypt suits individuals or organizations that need encrypted email for OpenPGP users or password-protected messages for other recipients. Enterprise features address administrators managing domain settings and users at larger scale.
Plans and prices
Free
Fewer than 100 users · 5 MB attachment threshold
Read 27 Sep 2026 · flowcrypt.com
Enterprise
Attachments up to 25 MB · More than 100 users per domain
Read 27 Sep 2026 · flowcrypt.com
On the record
- Admin controls
- Enterprise administrators can configure domain-wide settings and restrictions.flowcrypt.com · read 27 Sep 2026
- Attachment limit
- 25flowcrypt.com · read 20 Sep 2026
- Enterprise authentication
- Enterprise supports SSO through Google, OIDC providers, and delegated IdPs.flowcrypt.com · read 27 Sep 2026
- Chrome rating
- The homepage reports a 4.8 average Chrome Web Store review.flowcrypt.com · read 27 Sep 2026
- Company identity
- FlowCrypt is operated by FlowCrypt a.s. and has existed since 2016.flowcrypt.com · read 27 Sep 2026
- GDPR data agreement
- The enterprise DPA is described as complying with GDPR.flowcrypt.com · read 27 Sep 2026
- Encrypted email
- Users can send encrypted messages to OpenPGP users.flowcrypt.com · read 27 Sep 2026
- Enterprise user scale
- Enterprise supports domains with more than 100 users.flowcrypt.com · read 27 Sep 2026
- Free attachment limit
- Free users can add attachments up to 25MB.flowcrypt.com · read 27 Sep 2026
- Free tier
- A free FlowCrypt plan is available.flowcrypt.com · read 27 Sep 2026
- Gmail integration
- FlowCrypt integrates with Gmail and works from the Gmail interface.flowcrypt.com · read 27 Sep 2026
- Systems integration
- FlowCrypt can integrate with public key servers, HSMs, and internal systems.flowcrypt.com · read 27 Sep 2026
- Message expiry
- Users can choose when password-protected messages expire.flowcrypt.com · read 27 Sep 2026
- Outlook integration
- Yesflowcrypt.com · read 20 Sep 2026
- Password messages
- Users can send password-protected messages to anyone else.flowcrypt.com · read 27 Sep 2026
- Commercial pricing
- Enterprise commercial-use pricing requires contacting FlowCrypt.flowcrypt.com · read 27 Sep 2026
- Recipient replies
- Recipients can securely reply without installing a plugin.flowcrypt.com · read 27 Sep 2026
- Recipient verification
- passwordflowcrypt.com · read 20 Sep 2026
