The main reason for VPN services to have a no-logs policy is to protect their users from being tracked by law enforcement agencies, government agencies and hackers. If you see a VPN provider do not claim or promise that they have this policy, it could be possible for them to track your activities or store your private data and then give this information out if required.
The VPN services who have this feature include:
- Atlas VPN
- ZenMate VPN