Yes, the Website Technology Checker Extension is safe to use. You are expected to follow the recommended instructions mentioned for each extension.
Website Technology Checker Extension
Yes, we find live and fresh data. Every time you search, we do a fresh ping. Apart from that all the emails that you get are pre-verified.
Yes, you can use the tool for free, but if you are looking for email data for each website, you will be charged 0.5 credits per website.
Like mentioned it is an estimate that we prepare based on the data points we find. It is not 100% accurate but gives a good enough estimate so you can find big spenders and target them accordingly for your cold email outreach.