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Feature checklists make every tool look equivalent. This table leads with the three things that actually differ — what it costs you before it works, whether your files leave your device, and where the free version stops.
| Cal.comcal.com | Calendlycalendly.com | Doodledoodle.com | EasyRetroeasyretro.io | |
|---|---|---|---|---|
| What it does | Open-source scheduling links you can run on your own server | Send a link and let people book a slot your calendar says is free | Propose several times and let a group tick the ones that work for them | Runs a retro as a board of cards people add, vote on and group |
| What it costs you | Free tierA genuinely usable free tier with paid plans for volume or team features. | Free tierA genuinely usable free tier with paid plans for volume or team features. | Free tierA genuinely usable free tier with paid plans for volume or team features. | Free tierA genuinely usable free tier with paid plans for volume or team features. |
| Your files | Runs on their server | Runs on their server | Runs on their server | Runs on their server |
| Where it stops | Team scheduling, routing forms and white-labelling are paid — only the individual booking page is free. | One active event type on the free plan, and the booking page carries Calendly branding. | The free tier is ad-supported, and calendar sync and branding are reserved for paid plans. | Free boards are public to anyone with the link — private boards require a paid plan. |
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| Category | Collaboration & Meetings | Collaboration & Meetings | Collaboration & Meetings | Collaboration & Meetings |
| Last checked | 2026-07-29 | 2026-07-29 | 2026-07-29 | 2026-07-29 |
| Open the site | Open | Open | Open | Open |
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