The best open source alternative to Missive is Freescout. If that doesn't suit you, we've compiled a ranked list of other open source Missive alternatives to help you find a suitable replacement. Other interesting open source alternative to Missive is UnInbox.
Missive alternatives are mainly Customer Communication Platforms but may also be Helpdesk Software or Team Chat & Messaging Tools. Browse these if you want a narrower list of alternatives or looking for a specific functionality of Missive.
Self-hosted email management system with shared inboxes, automation, and powerful collaboration features for efficient customer support.

Freescout is a robust, open-source helpdesk solution designed to revolutionize your customer support workflow. With its self-hosted architecture, you maintain complete control over your data while enjoying enterprise-level features.
Key benefits of Freescout include:
Freescout empowers businesses of all sizes to deliver exceptional customer support while maintaining full control over their helpdesk infrastructure. Experience the freedom and flexibility of open-source without compromising on features or performance.
Streamline team communication with shared inboxes, unlimited email addresses, and customizable workflows. Perfect for modern businesses seeking organized email management.

UnInbox revolutionizes team email management with a powerful open-source platform designed for modern business collaboration. Teams can work together seamlessly through shared inboxes, with the ability to comment on conversations and reply from shared addresses, eliminating confusing email chains.
Key features include:
The platform offers tiered pricing options from Free to Enterprise, making it accessible for businesses of all sizes. The Pro plan includes advanced features like unlimited custom domains, SMTP & API access, and priority support, while Enterprise customers get additional security features like SAML SSO and dedicated instances.
Perfect for teams who need to manage multiple email addresses, track response statuses, and collaborate effectively on email communications. The open-source nature ensures transparency and customization possibilities for organizations.
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