CalendarServer
CalendarServer is a standards-compliant server implementation of the CalDAV and CardDAV protocols, including iMIP and APNS.
CalendarServer Alternatives
The best CalendarServer alternatives based on verified products, community votes, reviews and other factors.
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/baikal-alternativesCal and CardDAV server
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/radicale-alternativesThe Radicale Project is a complete CalDAV (calendar) and CardDAV (contact) server solution.
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Try for freeWarm up your cold email inbox, and never land in spam anymore!
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/sogo-alternativesSOGo is groupware server with a focus on scalability and open standards.
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/davical-alternativesDAViCal is a server for calendar sharing.
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/agendav-alternativesAgenDAV is an Open Source CalDAV Web application.
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/xandikos-alternatives
Lightweight CalDAV/CardDAV server on top of Git.
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/roundcube-alternativesWeb-based IMAP email client
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/calypso-alternativesCalypso is primarily a multi-user, multi-channel reservations system with a wide range of customer and technology driven features and functionalities.
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/libreplan-alternativesLibrePlan is an open source web application for project planning, monitoring and control.
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/mailreach-co-alternativesThe #1 email warming service to improve your deliverability by generating realistic and meaningful engagement to your emails. Easy-to-use solution to help you land in the main inbox instead of the spam folder.
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/rainloop-alternativesRainLoop is a web based email client.
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/owncloud-alternativesownCloud is an open source project enabling businesses to host their own cloud storage while maintaining regulatory and compliance needs.
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/infcloud-alternativesInfCloud is an open source CalDAV/CardDAV web client implementation released under GNU AGPL (version 3.0).
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