Plans and current product information
Rambox offers a permanent free Basic plan with unlimited apps and up to two instances per app. Its checked Pro price is $7 monthly or $70 annually. It is incorrect to describe Rambox as paid-only.
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.
Count account instances as well as service names
One mailbox, Telegram and WhatsApp are three services, while three separate WhatsApp accounts create a different requirement. Write down the number of simultaneous sign-ins needed for each service. An app limit and an instance limit are not interchangeable.
For team deployment, check account administration and workspace requirements separately. An individual Pro subscription does not automatically include company authentication, access administration or consolidated billing. For a personal set of tabs, start by testing Basic and Centrio Free.
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 Rambox 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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Try Centrio with your own workflow
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.