I often hear from employees of large companies that they use Vulners for Vulnerability Management because it's toll free. Well, strictly speaking, it is not.

In the footer of each Vulners.com page there is a link to EULA. According to it, it's free for personal, education or research use. If you use Vulners at work to monitor your infrastructure or to get information about vulnerabilities, this is a commercial usage and you have to pay.

How much? It's better to request the latest details from isox@vulners.com. But currently the price starts from $150/month WITHOUT API usage and from $500/month for 10000 API calls. For $1000/month you can use Vulners API without any restrictions.