Free Analysis tools:
Urlscan.io – allows you to scan a website and analyze the resources it requests and the domains it contacts.
Censys.io – is a public search engine that enables researchers to quickly ask questions about the hosts and networks that compose the Internet.
Shodan – use to discover which of your devices are connected to the Internet, where they are located and who is using them.
VirusTotal – analyze suspicious files and URLs to detect types of malware, automatically share them with the security community
AnyRun – malware analysis service.
PassiveTotal – consolidates massive sets of diverse internet data sources into a single platform.
Alienvault – provides threat intelligence, collaborative defense & effective security for organizations of all sizes.