The best Penetration Testing alternative to Nessus is Metasploit. It's not free, so if you're looking for a free alternative, you could try Metasploit or PhoneSploit Pro. If that doesn't suit you, our users have ranked more than 50 alternatives to Nessus and 16 are Penetration Testing Tools so hopefully you can find a suitable replacement. Other interesting Penetration Testing Tool alternatives to Nessus are Intruder, Pentestly.io, Probely and PENTESTON.
Nessus alternatives are mainly Penetration Testing Tools, but if you're looking for
Vulnerability Scanners you can filter on that. Other popular filters include
Open Source and
Free. You can also filter by region, for example
EU-based alternatives if you prefer software developed in the European Union. These are just examples - use the filter bar below to find more specific alternatives to Nessus.
Perimeter focussed, easy to use, manages process for new vulnerabilities for you.