Plans and current product information
Ferdium is a free, open-source project. Its official site advertises account-free use, workspaces and a custom server option. A free distribution model is not evidence that account or server features are absent, and ordinary installation should not be portrayed as developer-only work.
Centrio Free supports up to 3 services. Pro costs €4 monthly or €40 annually. Compare the full payment period, taxes and any separate provider charges rather than approximate exchange rates.
Choose a maintenance model that fits your team
Open source is useful if you want to inspect implementation or participate in fixes. Source availability alone does not replace checking updates, company rules and web-service compatibility. Running your own server adds backup and maintenance responsibilities.
Centrio has Free and paid Pro plans; Ferdium is worth testing if subscription-free open-source software is your main requirement. Compare the features you need with the same accounts. For network access, determine separately whether you need an integrated VPN client, an existing system VPN or company-managed settings.
Run the same test in both apps
- Use the same accounts and web pages; verify a new message while the target account is not active. Check sound, badge and the operating-system notification separately.
- Send and receive a small attachment. Open a link outside the app and confirm that it goes to the intended browser or account.
- Restart the app and test after the computer wakes from sleep. A saved session may still expire or be revoked by its service.
- For memory and startup comparisons, record OS, app versions, service count and elapsed time after launch. Measure all related processes with the same workload; idle numbers alone are not a benchmark.
Decide from your actual constraints
Keep Ferdium if it already completes your essential tasks at an acceptable cost. Test Centrio if its arrangement of services and plan features better fits your work. Neither product can guarantee every feature of a native messenger inside its web version.
Sources and verification
Product pages checked on September 17, 2026. Prices and plan limits can change; check checkout before paying.
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Free includes up to 3 services. Pro is €4 per month or €40 per year. Any illustrative price in another currency is not the billed amount.