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Stalwart Labs aims to provide a robust and feature-rich mail server solution. However, sustaining long-term development for such a project requires significant financial resources. Currently, we do not have enough open-source sponsors to cover these costs fully.

To bridge this funding gap and ensure the developers can work full-time and exclusively on enhancing Stalwart Mail Server, we offer a paid Enterprise version. The revenue from the Enterprise version is crucial for maintaining the quality and progress of both the paid and open-source versions.

Moreover, having a paid Enterprise version directly benefits the open-source community. The continuous development funded by the Enterprise version allows us to introduce new features and improvements to the open-source version as well.

It's important to note that the community edition of Stalwart Mail Server already boasts more features than any other open-source or paid mail server solution available in the market. We are committed to maintaining and expanding this lead.

We invite you to become a sponsor if you wish to support the open-source development further and help us release more features as open source in the future. Your sponsorship can make a significant difference in the project's growth and sustainability. Thank you for your understanding and support.

Yes. At Stalwart Labs, we are committed to maintaining the integrity and accessibility of Stalwart Mail Server as an open-source project. We understand the concerns arising from past incidents where popular open-source projects have changed their licensing models or moved certain features behind a paywall. We want to assure our community that we have no intention of doing a "rug pull."

Stalwart Mail Server will remain under the AGPLv3 license, and we will not change any existing open-source features into paid ones. Our commitment to the open-source community is unwavering, and we promise to keep the current open-source version fully accessible and free.

Our paid Enterprise version exists solely to support the long-term sustainability and development of the project. It allows us to fund full-time development and ensure that Stalwart Mail Server continues to grow and improve. The open-source version will continue to receive updates, enhancements, and new features as part of our ongoing commitment.

We appreciate the trust and support of our users and contributors. If you have any questions or concerns, please feel free to reach out to us. Thank you for believing in Stalwart Mail Server and our mission to provide a powerful, open-source mail server solution.

Our Enterprise licensing for Stalwart Mail Server is designed to be flexible and scalable to meet the needs of various organizations. Licenses are sold on a per-mailbox basis, allowing you to purchase only what you need, and charges are applied monthly, providing a straightforward and predictable cost structure.

We offer a tiered pricing scheme, meaning the more mailboxes you license, the lower the cost per mailbox. For those who prefer an annual billing cycle, we provide attractive discounts as an incentive for yearly payments.

Once you purchase an Enterprise license, you will receive a license key. This key is used to activate the Enterprise features in Stalwart Mail Server, unlocking advanced functionality and premium support.

Our goal is to provide a flexible licensing model that grows with your organization and offers the best value for your investment. If you have any questions about our licensing options or need help selecting the right plan for your needs, our support team is here to assist you.

To upgrade to the Enterprise version of Stalwart Mail Server, please contact us using the form provided on our website or via email. Our team will respond promptly with a customized quote and payment details based on your specific needs and the number of mailboxes you wish to license.

We are actively working on making the upgrade process more automated. In the future, you will be able to manage your Enterprise subscription directly from Stalwart's web-based management interface, providing a seamless and convenient upgrade experience.

For now, our support team is here to assist you through the upgrade process and ensure you have all the information you need to make the transition to Enterprise. If you have any questions or need further assistance, please don't hesitate to reach out to us.

If you decide to cancel your Stalwart Enterprise Edition subscription, the server will automatically revert to the Community Edition. This transition will disable all Enterprise features but will not cause any data loss or interrupt the service. Your existing data and emails will remain intact and accessible, ensuring a seamless experience for your users without any disruption.