osTicket

KommunikationGPL-3.0FreeSelf-HostedWeb

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

GitHub Repository Official Website

GitHub stars

Alternative to

Zendesk

Kommunikation

Zammad

Web-based helpdesk and customer support system with email, chat, and social media integration

AGPL-3.0Freemium

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

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Organized team chat with topic-based threading that combines email and chat for productivity

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Self-hostable Discord-compatible chat platform with federation and full API compatibility

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Private messenger with end-to-end encryption for secure text, voice, and video communication

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Dockerized email server suite with webmail, antispam, antivirus, and administration interface

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osTicket

GitHub stars

Alternative to

Zammad

Element

Zulip

Spacebar

Signal

mailcow

Bewertungen

osTicket

GitHub stars

Alternative to

Zammad

Element

Zulip

Spacebar

Signal

mailcow

Bewertungen

osTicket

GitHub stars

Alternative to

Related Alternatives

Zammad

Element

Zulip

Spacebar

Signal

mailcow

Bewertungen

osTicket

GitHub stars

Alternative to

Related Alternatives

Zammad

Element

Zulip

Spacebar

Signal

mailcow

Bewertungen