What is company tech stack?
Company tech stack (or technographics) is the inventory of software an account runs on its public website + product (e.g. uses Salesforce, HubSpot, Stripe, Segment, Datadog). BuiltWith and Wappalyzer are the canonical sources; some B2B databases (Cognism, ZoomInfo) layer in CRM-system + ATS detection beyond what's publicly inferrable.
When you're working from a company contact email, the company tech stack field becomes one of the most-requested enrichments because it lets you complete the buyer profile without forcing the prospect to fill another form. The trade-off is hit-rate: the company tech stack value is only as findable as your company contact email is unambiguous.