I’ve tried quite a few WordPress security plugins over the years, including some paid options, but honestly, I’ve had a surprisingly good experience with VMP™ Security Free. It comes with features that many plugins usually keep behind a paywall, and for a free plugin, the protection level feels really solid.
What I liked most was how lightweight and easy to configure it is, while still covering important security areas like malware protection, login security, firewall features, and vulnerability monitoring. In my experience, it performed better than some premium plugins I previously used.
That said, no matter which plugin you choose, make sure to keep your WordPress core, themes, and plugins updated regularly because security is never just about one plugin.