Element

KommunikationApache-2.0FreeWebWindowsmacOSLinuxAndroidiOS

Secure messaging app built on the Matrix protocol with end-to-end encryption and federation

GitHub Repository Official Website

GitHub stars

Alternative to

Slack

Kommunikation

Discord

Kommunikation

Microsoft Teams

Kommunikation

ntfy

Simple HTTP-based push notification service for sending alerts to phones and desktops

Apache-2.0Free

Thunderbird

Full-featured email client with calendar, contacts, and chat integration across platforms

MPL-2.0Free

Tuta

Encrypted email service with end-to-end encryption, calendar, and contacts for secure communication

GPL-3.0Freemium

Jitsi Meet

Secure video conferencing solution with screen sharing, chat, and recording without account required

Apache-2.0Free

Revolt

User-first chat platform with servers, channels, and bots built for communities and friends

AGPL-3.0Free

osTicket

Support ticket system that routes and manages customer inquiries from email, web, and phone

GPL-3.0Free

Element

GitHub stars

Alternative to

ntfy

Thunderbird

Tuta

Jitsi Meet

Revolt

osTicket

Recensioner

Element

GitHub stars

Alternative to

ntfy

Thunderbird

Tuta

Jitsi Meet

Revolt

osTicket

Recensioner

Element

GitHub stars

Alternative to

Related Alternatives

ntfy

Thunderbird

Tuta

Jitsi Meet

Revolt

osTicket

Recensioner

Element

GitHub stars

Alternative to

Related Alternatives

ntfy

Thunderbird

Tuta

Jitsi Meet

Revolt

osTicket

Recensioner