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StackWho – Find companies by tech stack with decision maker contacts

StackWho – Find companies by tech stack with decision maker contacts

by veritas9·Feb 21, 2026·1 point·0 comments
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AI Analysis

●●SolidSolve My ProblemSlick

BuiltWith plus verified emails and LinkedIn profiles, but ZoomInfo and Apollo already do this.

Strengths
  • •Combines tech stack detection with decision maker contact data in one query
  • •Clean CSV export workflow integrates directly into CRM and outreach tools
  • •Covers 1,486+ technologies across 689k companies with verified email addresses
Weaknesses
  • •Contact data verification accuracy and freshness unclear from landing page
  • •Crowded competitive space with established players (ZoomInfo, Apollo, Hunter) offering similar stacks
Category
SaaS
Target Audience

B2B sales teams, SDRs, recruiters, and business development professionals

Similar To

ZoomInfo · Apollo.io · Hunter.io

Post Description

Hey HN! I built StackWho (stackwho.com) because I kept running into the same problem: tools like BuiltWith and Wappalyzer are great for finding what tech a company uses, but they stop there. You still have to hunt down the right person to reach out to.

StackWho combines tech stack data with verified contacts. Like CEO, CTO, VP Engineering, Head of Sales including emails and LinkedIn profiles. You can filter by technology, industry, location, and company size, then export to CSV and drop it straight into your CRM.

Free to browse. No annual contracts. Happy to answer questions or hear feedback!

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