Papercups

KomunikacjaMITFreeWebSelf-Hosted

Open-source live chat widget for websites with real-time messaging and Slack integration

GitHub Repository Official Website

GitHub stars

Alternative to

Intercom

Komunikacja

Thunderbird

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

MPL-2.0Free

Jitsi Meet

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

Apache-2.0Free

Wire

Secure collaboration platform with encrypted messaging, video calls, and file sharing for teams

GPL-3.0Freemium

mailcow

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

GPL-3.0Free

Mattermost

Secure team messaging platform with channels, file sharing, and workflow automation for enterprises

otherFreemium

Discourse

Modern forum platform for civilized community discussion with real-time updates

GPL-3.0Freemium

Papercups

GitHub stars

Alternative to

Thunderbird

Jitsi Meet

Wire

mailcow

Mattermost

Discourse

Recenzje

Papercups

GitHub stars

Alternative to

Thunderbird

Jitsi Meet

Wire

mailcow

Mattermost

Discourse

Recenzje

Papercups

GitHub stars

Alternative to

Related Alternatives

Thunderbird

Jitsi Meet

Wire

mailcow

Mattermost

Discourse

Recenzje

Papercups

GitHub stars

Alternative to

Related Alternatives

Thunderbird

Jitsi Meet

Wire

mailcow

Mattermost

Discourse

Recenzje