c.Email

c.Email is ranked #7 of 28 in email encryption software on The Geeks Club, made by c.Email (London, United Kingdom). It runs on Browser extension. There is a free plan.

c.Email plans and pricing

All plans

Free Free c.Email is free for all users. Existing email address support · End-to-end encryption · Verified sending c.email · 27 Sept 2026

Premium Not published c.email · 27 Sept 2026

Business Self-Serve Not published c.email · 27 Sept 2026

Business Plus Not published c.email · 27 Sept 2026

Compared on email encryption software

Free plan: Yes

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c.Email

Free plan: Yes
Free pricing: c.Email is free for all users and will always have a free tier.
Premium status: Premium features are planned as part of an expanded product suite.
Free features: The free plan includes encryption, verified sending, post-quantum security, and For Your Eyes Only emails.
Email addresses: The free plan allows unlimited email addresses.
Supported addresses: Users can connect an existing Gmail or Outlook address.
Platforms and apps: c.Email is available as an app and browser extension, including a Chrome extension.
Existing email: Users keep their current email address and do not need to create a new account.
Identity check: Setup includes a one-time identity check with an existing ID and liveness check.
On-device data: Identity data is stored only on the user's device and does not leave it.
Encryption method: c.Email uses end-to-end hybrid public-key encryption combining classical and post-quantum cryptography.
Post-quantum standard: c.Email uses ML-KEM, the post-quantum standard published by NIST.
Server access: Emails are encrypted and decrypted on devices and are not stored, encrypted, or decrypted on c.Email servers, with a business exception.
Security levels: Users can choose Not secure, Secure, or For Your Eyes Only email security.
Price from: Free

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Where it ranks on The Geeks Club

Best Email Encryption Software in 2026#7 of 28
Best File Encryption Tools in 2026#4 of 27

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Sources

c.email· checked 20 Sept 2026
c.email/pricing· checked 27 Sept 2026