Why would you want to pay for a proxy service when you can sign up for a free one? Firstly, let’s see where it hides the risk.
Free proxies or free risks?
Free proxies offer little protection from various outside threats, including malicious software attacks, traffic interceptions and data theft. They are almost always poorly encrypted, or not encrypted at all. If you‘re planning to use a proxy service, you must be 100% sure that all of your valuable data is completely secure.
Not to mention the case of poor maintenance and lack of customer support. If the service crashes or if your device gets infected with malware, no one can be held accountable for that but yourself.
Free proxy lists are often full of blocked or dead proxies, at the meantime they are usually incredibly slow.
On top of that, they are not always entirely free. They are advertised as free, but as soon as you sign up you may find that there’s quite a bunch of hidden costs that prevent you from doing what you need to do.
The main rule is quite simple. If you are serious about protecting your data and online security, never use free proxies.
The only thing that might make sense here is basic, casual use.