Leadsario
Leadsario is a B2B prospecting platform for finding, checking, and organizing professional contact information.
What Leadsario is
Leadsario is a B2B prospecting platform for finding, checking, and organizing professional contact information. Its search engine covers more than 500 million contacts. Users can perform bulk searches, call a REST API, export CSV files, or work through the web service and browser extension. For enrichment, upload a CSV containing first name, last name, and company domain to receive verified email addresses and confidence scores; lists of up to 10,000 rows are typically processed within minutes. Leadsario describes a seven-level email verification process that includes MX record checks, SMTP handshake verification, and catch-all detection. The Chrome extension captures emails, phone numbers, and company details while browsing LinkedIn, company sites, and Google Maps, processing up to 25 LinkedIn profiles per page. Native integrations include HubSpot, Salesforce, Pipedrive, Outreach, Lemlist, and Apollo. The free plan costs nothing and includes 50 email lookups monthly, the Chrome Extension, and Email Verifier. Leadsario says it is GDPR compliant, uses EU data centers, and provides data-subject request tools.
Good
- Database of more than 500 million contacts
- Seven-tier email verification process
- CSV enrichment for up to 10,000 rows
- Native CRM and outreach integrations
- Free plan with 50 monthly lookups
Watch out
- Extension bulk processing is limited to 25 profiles per page
- Firefox support is still in beta
- Safari support is on the roadmap
Who it suits
Leadsario suits sales teams building prospect lists and verifying business contacts. Team workspaces support pooled leads and shared credits.
Verdict
Leadsario combines contact discovery, verification, enrichment, and outreach integrations in web, API, and extension formats. Its free tier provides a limited starting point for prospecting workflows.
Plans and prices
From Leadsario's own pricing page, checked 8 Oct 2001.
| Plan | Price | What it gives you |
|---|---|---|
| Free tier | Free | 50 email lookups per month · Chrome Extension · Email Verifier |
The facts
Each one read from Leadsario's own pages, with the date it was checked.
Where it runs
- Browser extension
- The Chrome Extension captures emails, phone numbers, and company data while browsing LinkedIn, company websites, and Google Maps.checked 8 Oct 2001
- Supported browsers
- The extension page lists Google Chrome and Chromium-based browsers including Edge, Brave, and Arc; it says Firefox is in beta and Safari is on the roadmap for Q3 2026.checked 8 Oct 2001
What it does
- Bulk enrichment
- Users can upload a CSV with first name, last name, and company domain to receive enriched results with verified emails and confidence scores; the site says lists up to 10,000 rows are typically processed within minutes.checked 8 Oct 2001
- Contact database
- The site says its engine searches a database of more than 500 million contacts.checked 8 Oct 2001
- Email verification
- Leadsario says it uses a seven-tier verification process that includes MX record checks, SMTP handshake verification, and catch-all detection.checked 8 Oct 2001
- Extension browsing data
- The extension page says it activates on pages where users explicitly use it and does not track general browsing history or collect visited URLs.checked 8 Oct 2001
- Extension limits
- The extension can process LinkedIn search results in bulk at up to 25 profiles per page.checked 8 Oct 2001
- Integrations
- The homepage lists native integrations with HubSpot, Salesforce, Pipedrive, Outreach, Lemlist, and Apollo, plus CSV export and a REST API.checked 8 Oct 2001
- Security and privacy
- The homepage says Leadsario is GDPR compliant, surfaces publicly available business contact information, provides data subject request tools, and hosts its infrastructure in EU data centers.checked 8 Oct 2001
- What it does
- Leadsario describes itself as a B2B lead generation platform for finding and verifying professional contact information and building prospect lists.checked 8 Oct 2001
- Who it serves
- The site presents Leadsario as a prospecting tool for sales teams and describes team workspaces with pooled leads and centrally managed shared credits.checked 8 Oct 2001
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