Short answer:
Duplicacy Web Edition offers a 30-day backup trial. Backup creation after the trial needs an eligible license; some restore and management operations remain usable without a backup license. CLI personal backups are free under the developer's stated exceptions.
Questions to settle before purchase
- Decide if the data belongs to personal use or commercial activity.
- Identify whether you need the Web GUI, old GUI or CLI.
- Check how many Windows computers will run backups and review per-machine licensing.
- Confirm the latest charges on the developer's licensing page rather than relying on a cached amount.
Pricing, renewal details and exceptions may change. Read the developer's live license terms before paying.