Top 9 Open-Source Alternatives to Opera Mail

Product categories

Appointments and Scheduling Calendar Disposable Email Email Email Archiving Email Clients Email Management Email Security Email Service Provider Enterprise Communication SMTP Server Self-hosted Email

Summary

The top open-source alternatives to Opera Mail are Mailspring, Spark Mail, and Mail-in-a-box. 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.

Mailspring Landing Page
1

Mailspring

Mailspring is a mail client for Mac, Windows and Linux.
Pricing:
- Open Source
#Email #Email Clients #Calendar 25 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 #Email Clients #Calendar 30 social mentions
Mail-in-a-box Landing Page
3

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 #Self-hosted Email #Email Service Provider 115 social mentions
Tutanota Landing Page
4

Tutanota

Get your encrypted mailbox for free.
Pricing:
- Open Source
#Email #Email Clients #Enterprise Communication 177 social mentions
iRedMail Landing Page
5

iRedMail

A fully fledged, free email server solution, an open source project (GPL v2).
Pricing:
- Open Source
#Email #SMTP Server #Self-hosted Email 2 social mentions
Mailpile Landing Page
6

Mailpile

Mailpile is a modern, fast web-mail client with user-friendly encryption and privacy features.
Pricing:
- Open Source
#Email #Email Clients #Email Management
Calendar Lock PEA Landing Page
7

Calendar Lock PEA

Calendar Lock PEA is an encrypted desktop calendar with a day, week and month view. The shown calendars are never stored unencrypted on your disk, but exist only in the RAM. Platform-independent, Open Source, no installation or registration required.
Pricing:
- Open Source
#Calendar #Appointments and Scheduling #Encryption
Thexyz Landing Page
8

Thexyz

Secure premium email service with mobile sync apps for calendar, contacts, tasks, notes and FISMA compliant email archiving.
Pricing:
- Open Source
- Paid
- $2.95 / Monthly (25GB)
#Email #Email Security #Email Archiving 1 social mentions
FairEmail Landing Page
9

FairEmail

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