The best replacement for openvas is nessus.

The best alternatives to openvas are rated as following:
★★★★★  nessus
★★★★★  metasploit
★★★★★  nmap

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Speaking about openvas, one probably shouldn't forget about metasploit.

Other search terms related to openvas and their ratings are:
★★★★★ metasploit
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Google Trends

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