Top 12 Open-Source Alternatives to Zoho Mail

Zoho Mail

Zoho Mail is a secure, encrypted, and enterprise-ready email solution, a suite of apps tailor-made for your organization's needs. .

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Pricing:

Freemium
Free Trial
$1.0 / Monthly (per user)
Official Pricing

Platforms:

Browser
Windows
iOS
iPhone
Android

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Product categories

APIs Appointments and Scheduling Calendar Calendar And Scheduling Email Email Clients Email Service Provider Enterprise Communication Hosted Email Open Source SMTP Server Self-hosted Email

Summary

The top open-source alternatives to Zoho Mail are Tutanota, Spark Mail, and Mailpile. One of the criteria for ordering this list is the number of mentions that products have on reliable external sources. You can suggest additional sources through the form here.

Tutanota Landing Page
1

Tutanota

Get your encrypted mailbox for free.
Pricing:
- Open Source
#Email #Enterprise Communication #Email Clients 180 social mentions
Spark Mail Landing Page
2

Spark Mail

Spark helps you take your inbox under control. Instantly see what’s important and quickly clean up the rest. Spark for Teams allows you to create, discuss, and share email with your colleagues
Pricing:
- Open Source
#Email #Calendar #Email Clients 30 social mentions
Mailpile Landing Page
3

Mailpile

Mailpile is a modern, fast web-mail client with user-friendly encryption and privacy features.
Pricing:
- Open Source
#Email #Enterprise Communication #Email Clients
Mail-in-a-box Landing Page
4

Mail-in-a-box

Mail-in-a-Box provides webmail and an IMAP/SMTP server for use with mobile devices and desktop mail software and also includes contacts and calendar synchronization.
Pricing:
- Open Source
#Email #Email Service Provider #Email Clients 122 social mentions
Roundcube Landing Page
5

Roundcube

Web-based IMAP email client
Pricing:
- Open Source
#Email #Email Clients #SMTP Server 16 social mentions
iRedMail Landing Page
6

iRedMail

A fully fledged, free email server solution, an open source project (GPL v2).
Pricing:
- Open Source
#Email #Email Clients #SMTP Server 3 social mentions
Mailspring Landing Page
7

Mailspring

Mailspring is a mail client for Mac, Windows and Linux.
Pricing:
- Open Source
#Email #Calendar #Enterprise Communication 25 social mentions
Criptext Landing Page
8

Criptext

Criptext - Security that goes beyond encryption.
Pricing:
- Open Source
#Email #Enterprise Communication #Email Service Provider 3 social mentions
FairEmail Landing Page
9

FairEmail

Open source, privacy friendly email app
Pricing:
- Open Source
#Email #Calendar #Email Clients 52 social mentions
mailcow Landing Page
10

mailcow

An open source mailserver suite.
Pricing:
- Open Source
#Email #Open Source #Email Service Provider 87 social mentions
SpamAssassin Landing Page
11

SpamAssassin

Use this program to "Unspam" your mailbox(es).
Pricing:
- Open Source
#Email #Email Security #Cyber Security 6 social mentions
Cal.com Landing Page
12

Cal.com

Cal.com (formerly Calendso) is the open source Calendly alternative.
Pricing:
- Open Source
#Productivity #Appointments and Scheduling #Open Source 56 social mentions