StackWho
StackWho is a web service for finding companies by their technology stacks and locating decision makers with verified contact details.
What StackWho is
StackWho is a web service for finding companies by their technology stacks and locating decision makers with verified contact details. Its site says the database tracks more than 689,020 companies and 1,486 technologies worldwide. Search filters cover technology, industry, location, and company size. Profiles may include names, titles, verified email addresses, and LinkedIn profile URLs. Free users can browse company profiles and full technology stacks, but contact emails are masked and results stop at 10 pages. Pro adds full contact details, unlimited result pages, saved searches, custom lists, and unlimited CSV exports, with up to 5,000 companies per export. CSV data can be imported into HubSpot, Salesforce, Outreach, Apollo, or another CRM. StackWho says it detects technologies through public website and company information, rescans websites weekly, and refreshes metadata on that schedule. It also says it honors opt-out requests and complies with GDPR and CAN-SPAM. The service is web-based, with Pro at $79 a month.
Good
- Searches by technology, industry, location, and size
- Profiles can include verified contact details
- Weekly website rescans
- Unlimited CSV exports on Pro
- Free plan available
Watch out
- Free emails are masked
- Free results limited to 10 pages
- Free plan has no CSV exports
- Pro costs $79 a month
Who it suits
StackWho suits sales, recruiting, and research users seeking companies by technology and contacts for outreach. It is also useful for CRM workflows that accept CSV imports.
Verdict
StackWho provides technology-based company discovery with contact and export features. The free tier is useful for browsing, while outreach workflows require Pro.
Plans and prices
From StackWho's own pricing page, checked 8 Oct 2001.
| Plan | Price | What it gives you |
|---|---|---|
| Pro | $79 a month | Full contact details · unlimited search result pages · unlimited CSV exports · saved searches and custom lists · each export up to 5,000 companies |
| Free | — | 10 pages of search results · masked contact emails · no CSV exports |
The facts
Each one read from StackWho's own pages, with the date it was checked.
What it does
- Cancellation
- Monthly and annual subscriptions can be cancelled from the dashboard, with access continuing until the billing period ends and no cancellation fees.checked 8 Oct 2001
- Contacts
- Company profiles can include decision makers' names, titles, verified email addresses, and LinkedIn profile URLs.checked 8 Oct 2001
- CRM workflow
- The site says CSV data can be imported into HubSpot, Salesforce, Outreach, Apollo, or another CRM.checked 8 Oct 2001
- Database
- The site says StackWho tracks more than 689,020 companies and 1,486 technologies globally.checked 8 Oct 2001
- Data collection
- StackWho says it detects technologies using public website code, HTTP headers, DNS records, JavaScript libraries, meta tags, CDN patterns, job postings, and public repositories.checked 8 Oct 2001
- Data freshness
- The company says it rescans company websites weekly and refreshes company metadata on the same cycle.checked 8 Oct 2001
- Exports
- Pro subscribers can export unlimited CSVs, with up to 5,000 companies in each export.checked 8 Oct 2001
- Privacy
- StackWho says its data comes from public sources, that it complies with GDPR and CAN-SPAM, and that it honors opt-out requests.checked 8 Oct 2001
- Product
- StackWho helps users find companies by their technology stacks and reach decision makers with verified contact details.checked 8 Oct 2001
- Search
- Users can filter companies by technology, industry, location, and company size.checked 8 Oct 2001
- Security
- StackWho says account data and saved lists are encrypted at rest and in transit, and that Stripe processes payments while StackWho does not store card details.checked 8 Oct 2001
- Support
- The contact page says StackWho aims to respond to messages within 1–2 business days.checked 8 Oct 2001
Money
- Free plan limits
- Free users can browse company profiles and full technology stacks, but contact emails are masked and results are limited to 10 pages.checked 8 Oct 2001
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