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StackWho
What StackWho is
StackWho helps users identify companies by the technologies they use and find decision makers with contact details. Its site says the database tracks more than 689,020 companies and 1,486 technologies globally. Search filters let users narrow companies by technology, industry, location, and company size. Profiles can include decision makers’ names and titles, verified email addresses, and LinkedIn profile URLs. The free plan provides access to company profiles and full technology stacks, while masking contact emails and limiting search results to 10 pages. Pro adds full contact details, unlimited result pages, saved searches, custom lists, and unlimited CSV exports, with up to 5,000 companies in each export. CSV data can be brought into HubSpot, Salesforce, Outreach, Apollo, or another CRM. StackWho says it detects technologies from public website and company information, rescans company websites weekly, and refreshes company metadata on the same cycle. The service says it honors opt-out requests and complies with GDPR and CAN-SPAM. StackWho is a web service, with Pro priced at $79 a month.
Who it suits
StackWho suits users prospecting for companies that use particular technologies and seeking decision makers at those companies. It also fits teams that want to filter company lists and export them to a CRM.
What it does well
- Search by technology, industry, location, and company size.
- Profiles can include verified emails and LinkedIn profile URLs.
- Pro includes unlimited search result pages and CSV exports.
- Exports can contain up to 5,000 companies each.
- CSV data can be imported into several named CRMs.
What to know first
- Free search is limited to 10 pages.
- Free contact emails are masked and CSV export is unavailable.
- Pro costs $79 a month.
Limits
The free plan limits search results to 10 pages, masks contact emails, and does not include CSV exports. Pro exports can each contain up to 5,000 companies.
Plans
| Plan | Billed and limits | Price |
|---|---|---|
| Pro | Full contact details · unlimited search result pages · unlimited CSV exports · saved searches and custom lists · each export up to 5,000 companies | $79 a month |
| Free | 10 pages of search results · masked contact emails · no CSV exports | On request |
As stackwho.com lists them, read 8 Oct 2026. The maker's own page has the final word.
Getting started
- Visit StackWho’s website and use the web service.
- Start with the free plan to browse company profiles and technology stacks.
- Choose Pro at $79 a month for full contact details and exports.
- Filter companies by technology, industry, location, or company size.
- Export CSVs on Pro and import them into a CRM if needed.
Verdict
Pick StackWho if you want to find companies by technology and use filters, contact details, or CSV exports for prospecting. The free plan may be enough to browse profiles and technology stacks, but full contact details and unlimited results require Pro.
Questions
Is StackWho free?
Yes. Its free plan allows browsing company profiles and full technology stacks, with results limited to 10 pages and contact emails masked.
How much is StackWho Pro?
Pro costs $79 a month.
What does Pro add?
Pro provides full contact details, unlimited search result pages, saved searches, custom lists, and unlimited CSV exports of up to 5,000 companies per export.
Which platforms does StackWho support?
StackWho is available on the web.
Can StackWho data be used with a CRM?
Yes. StackWho says CSV data can be imported into HubSpot, Salesforce, Outreach, Apollo, or another CRM.
How can I cancel a subscription?
Monthly and annual subscriptions can be cancelled from the dashboard. Access continues until the billing period ends, with no cancellation fees.
Facts from StackWho's own pages
- Cancellation
- Monthly and annual subscriptions can be cancelled from the dashboard, with access continuing until the billing period ends and no cancellation fees. · stackwho.com, 8 Oct 2026
- Contacts
- Company profiles can include decision makers' names, titles, verified email addresses, and LinkedIn profile URLs. · stackwho.com, 8 Oct 2026
- CRM workflow
- The site says CSV data can be imported into HubSpot, Salesforce, Outreach, Apollo, or another CRM. · stackwho.com, 8 Oct 2026
- Database
- The site says StackWho tracks more than 689,020 companies and 1,486 technologies globally. · stackwho.com, 8 Oct 2026
- 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. · stackwho.com, 8 Oct 2026
- Data freshness
- The company says it rescans company websites weekly and refreshes company metadata on the same cycle. · stackwho.com, 8 Oct 2026
- Exports
- Pro subscribers can export unlimited CSVs, with up to 5,000 companies in each export. · stackwho.com, 8 Oct 2026
- 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. · stackwho.com, 8 Oct 2026
- Privacy
- StackWho says its data comes from public sources, that it complies with GDPR and CAN-SPAM, and that it honors opt-out requests. · stackwho.com, 8 Oct 2026
- Product
- StackWho helps users find companies by their technology stacks and reach decision makers with verified contact details. · stackwho.com, 8 Oct 2026
- Search
- Users can filter companies by technology, industry, location, and company size. · stackwho.com, 8 Oct 2026
- 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. · stackwho.com, 8 Oct 2026
- Support
- The contact page says StackWho aims to respond to messages within 1–2 business days. · stackwho.com, 8 Oct 2026
Where StackWho stands on Freedom251
- Technographic Data Software#17 of 31