StackScan
1. StackScan, for the one field nobody else fills
Every other tool here can tell me how big a company is. Almost none of them can tell me what that company runs.
That is the field I actually want, because it is the only one that changes the first line of the email.
StackScan takes a domain and gives back the stack. Checkout platform, email tool, analytics, payment processor, hosting, the frameworks underneath. It watches more than 360 million domains and tracks over 55,000 technologies.
For enrichment specifically, the part that matters is that it does not end at a download. There is a REST API, direct CRM integrations, and an n8n node, so the stack can land on the record the same hour the record is created. There is an MCP server too, if your team has moved research into an AI client.
I use it two ways. Backfill, where I push an export of everything already in the CRM through it and get a stack column back. And watch, where anything new gets scanned on the way in.
The public technology pages are the cheapest way to see whether the data is any good before you pay. Shopify and Klaviyo are the two I check most, and WooCommerce if you sell into the WordPress half of ecommerce.
One honest caveat. This is company and domain data. Nobody's mobile number comes out of it, so you will still pay somebody else for contacts.
Earns its place for
- +Fills a field no firmographic vendor has
- +REST API, CRM sync and an n8n node, not just exports
- +Lowest entry price here with coverage at that scale
- +You can look at the data before you buy
Where it lets you down
- −Companies and domains, so contact data still comes from elsewhere
- −Tells you what they run, not who signs off on replacing it