Based on our record, Framadate seems to be more popular. It has been mentiond 2 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
We also offer one of the few free and ad-free alternatives to Google Forms ( https://framaforms.org ). And https://framadate.org (alternative to Doodle) welcomes nearly 75 0000 people per day and is installed by hundreds (thousands?) of organizations. Source: about 3 years ago
Alternatively to Doodle, if you want something that handles your data more sensitive, then go for Framadate. Source: about 3 years ago
Zimbra - Zimbra is trusted by over 500 million users to increase productivity with a complete set of collaboration tools while maintaining total control over security and privacy.
Doodle - Make meetings happen. With Doodle, scheduling becomes quick and easy.
iRedMail - A fully fledged, free email server solution, an open source project (GPL v2).
Dudle - Dudle is an online scheduling application, which is free and open source.
mailcow - An open source mailserver suite.
Xoyondo - Xoyondo makes it easy to find a date for your event that works for everybody. You can also create polls and conduct surveys. Xoyondo is free. No registration required.