Side by side
BlueMind vs Clustra Calendar
Both stand on calendar apps. Which one you can start free with, which one lets you read the code, and what each costs once you pay.
Free plan AndroidiPhoneLinux+4
BlueMind combines email, calendars, contacts, tasks, conferencing, migration tools, and administrative controls across web, desktop, and mobile access. Its IPv4-only server requirement and substantial default memory requirement matter when planning self-hosted deployment.
Visit BlueMind Free plan Web
Clustra Calendar combines team scheduling with event-linked notes and booking links. Its free tier has a small stated member and workspace limit, while paid plans add larger-scale options.
Visit Clustra CalendarThe facts
| BlueMind | Clustra Calendar | |
|---|---|---|
| Free plan | Yes | Yes |
| Open source | Not published | Not published |
| Runs on | Android, iPhone, Linux, Mac, Self-hosted, Web, Windows | Web |
| Lowest paid plan | Free or on request | Pro: $8 a year |
| Plans published | 5 | 4 |
| Maker | BlueMind | Not published |
| Website | bluemind.net | clustra.org |
| On calendar apps | #60 of 194 | #64 of 194 |
BlueMind: what it does well
- Native Outlook compatibility without a connector
- Shared mailboxes, delegation, filters, and search
- Calendar sharing and resource calendars
- Video meetings with screen or application sharing
- Free plan allows up to 10 accounts
What to know first
- Server supports IPv4 only
- Default setup requires at least 24 GB RAM
- Installation needs a dedicated server or virtual machine
- Free plan is limited to 10 accounts
Clustra Calendar: what it does well
- Team availability appears in a shared grid.
- Booking links can route requests and send reminders.
- Events can have linked agenda and recap notes.
- Paid plans include a 14-day trial without a credit card.
What to know first
- Free plan is limited to 5 members and 1 workspace.
- Formal SOC 2 and ISO certifications are on the roadmap.
Alternatives to BlueMind Alternatives to Clustra Calendar The whole list