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Cypht

Free plan Self-hostedWeb

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Cypht's own site

What Cypht is

Cypht is a free, open-source webmail client that brings existing email accounts into one inbox. It reads mail through IMAP, EWS and JMAP, and sends through SMTP. Users can search across accounts, save searches, apply tags and labels, and move or copy messages between accounts. Composition supports plain text, HTML and Markdown, while Sieve filters can move, copy or delete messages. Cypht also includes scheduled sending and calendar tools. It can be self-hosted, with installation methods including manual setup, Docker, YunoHost and Tiki; Cloudron, YunoHost and Tiki are also listed as platforms that embed or package it. Security features include TOTP two-factor authentication, TLS/STARTTLS for IMAP, LDAP and SMTP, and OAuth2 over IMAP/SMTP for Gmail and Outlook. The maker says session and persistent data are encrypted, with persistent-data keys derived from a password that is not stored. HTML email is filtered and external resources are removed before display. Modules can add features or alter behavior without changing core code.

Who it suits

Cypht suits people and organizations that want to bring multiple email accounts into a webmail client, including ISPs, schools, businesses and personal users. Its self-hosted deployment options may suit teams that want to manage installation themselves.

What it does well

  • Combines accounts using IMAP, EWS and JMAP.
  • Supports cross-account search and saved searches.
  • Includes scheduled sending and calendar tools.
  • Offers multiple self-hosting installation methods.
  • Encrypted persistent data uses keys derived from an unstored password.

What to know first

  • The listed platforms are web and self-hosted.
  • HTML email is filtered and external resources are removed.

Plans

PlanBilled and limitsPrice
CyphtFree and open source; LGPL v2.1Free

As cypht.org lists them, read 11 Oct 2026. The maker's own page has the final word.

Getting started

  1. Visit the Cypht website.
  2. Choose manual installation, Docker, YunoHost, or Tiki deployment.
  3. Alternatively, use a platform that embeds or packages Cypht, such as Cloudron, YunoHost, or Tiki.
  4. Connect existing email accounts using supported reading protocols and SMTP for sending.

Verdict

Cypht offers a broad set of inbox, search and filtering tools without a listed plan cost. Consider its web-focused platform and self-hosting options when deciding how it fits your email setup.

Questions

Is Cypht free?

Yes. The Cypht plan costs nothing and is open source under LGPL v2.1.

Can Cypht combine multiple email accounts?

Yes. It combines existing accounts into a unified inbox and supports cross-account search.

Which email protocols does it support?

It supports IMAP, EWS, and JMAP for reading, and SMTP for sending.

Can Cypht be self-hosted?

Yes. Deployment methods include manual installation, Docker, YunoHost, and Tiki.

What security features does the maker describe?

They include TOTP two-factor authentication, TLS/STARTTLS, OAuth2 over IMAP/SMTP for Gmail and Outlook, and encryption of session and persistent data.

Does it support scheduled sending and calendar tools?

Yes. Cypht lists scheduled sending and calendar tools.

Facts from Cypht's own pages

App coverage
web · cypht.org, 23 Sept 2026
Calendar tools
Yes · cypht.org, 23 Sept 2026
Customization
Cypht uses modules that can add features or change behavior without modifying core code. · cypht.org, 11 Oct 2026
Data protection
The maker says session and persistent data are encrypted, with persistent-data encryption keys derived from the user's password, which is not stored. · cypht.org, 11 Oct 2026
Deployment
The installation guide lists manual, Docker, YunoHost, and Tiki deployment methods. · cypht.org, 11 Oct 2026
Email rendering
HTML email is filtered through HTMLPurifier, and external resources are removed before rendering. · cypht.org, 11 Oct 2026
Email tools
Users can move or copy messages between accounts, use tags and labels, and compose in plain text, HTML, or Markdown. · cypht.org, 11 Oct 2026
Free plan
Yes · cypht.org, 23 Sept 2026
Integrations
The maker lists Tiki, Cloudron, and YunoHost as platforms that embed or package Cypht. · cypht.org, 11 Oct 2026
Intended users
The maker describes Cypht as suitable for ISPs, schools, businesses, and personal use. · cypht.org, 11 Oct 2026
Product
Cypht is an open-source webmail client that combines existing email accounts into a unified inbox. · cypht.org, 11 Oct 2026
Protocols
It supports IMAP, EWS, and JMAP for reading email, and SMTP for sending. · cypht.org, 11 Oct 2026
Search and filters
Cypht supports cross-account search, saved searches, and Sieve filters that can move, copy, or delete messages. · cypht.org, 11 Oct 2026
Security
The security page describes TOTP two-factor authentication, TLS/STARTTLS for IMAP, LDAP, and SMTP, and OAuth2 over IMAP/SMTP for Gmail and Outlook. · cypht.org, 11 Oct 2026
Scheduled sending
Yes · cypht.org, 23 Sept 2026
Support
The maker invites users to contact the team with questions and says the team aims to respond quickly. · cypht.org, 11 Oct 2026
Unified inbox
It provides combined inbox, unread, sent, and flagged views across email accounts and RSS feeds. · cypht.org, 11 Oct 2026

Where Cypht stands on Freedom251

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