Intelx.io Free _hot_

Users can search for specific "selectors" including email addresses, domains, IP addresses, CIDRs, Bitcoin addresses, and IPFS hashes. Initial 7-Day Trial: New registrants typically receive a 7-day trial

Intelx provides tiered access levels for non-paying users, ranging from completely anonymous searches to limited-time professional trials. Intelx.io Free

If you use the free tier, use it strategically. Don't search for broad terms. Search for very specific unique strings (e.g., "john.doe+backup@gmail.com" ). That way, the single result you get is actually useful. Users can search for specific "selectors" including email