Verify Your Recruiting Contact Lists
Purpose-built data enrichment for your industry. Verify contacts, append missing fields, and enrich every record with data from 15+ providers.
Start Free — 30 CreditsThe Problem
Recruiting and staffing firms manage candidate databases with tens of thousands of contacts whose information changes constantly. Candidates switch jobs every 18-24 months on average, making work emails and office phone numbers obsolete almost as fast as they are collected. LinkedIn profiles stay current but do not provide verified email addresses or direct phone numbers. ATS systems like Greenhouse, Lever, and Bullhorn accumulate years of stale candidate data that pollutes search results and wastes recruiters' time on unreachable contacts.
How Cleanlist Solves This
Cleanlist verifies and refreshes recruiting contact lists by cross-referencing each candidate's email and phone against 15+ data providers in real-time. Invalid work emails are flagged, current employers and job titles are updated, and direct phone numbers (personal cell and new work number) are appended. For staffing firms running email outreach campaigns to passive candidates, Cleanlist's email verification ensures deliverability above 95% — protecting your sender reputation and keeping your outreach out of spam folders. The output can be exported back to your ATS or CRM in the exact format your system requires.
ATS Databases Have 42% Stale Data After Just 12 Months Without Verification
Bullhorn's 2025 Staffing Industry Benchmark found that 42% of candidate records in the average ATS have at least one critical field (email, phone, employer, or title) that is outdated within 12 months of entry. The decay rate is even higher for tech candidates (52%) and early-career professionals (58%), who change jobs more frequently. For a recruiting firm with 100,000 candidates in their database, that represents 42,000 records generating bounced outreach, wasted sourcer time, and missed placements. Cleanlist customers in staffing report that their first verification run typically flags 15-25% of emails as undeliverable and updates employer data on 20-30% of records. The most common finding: candidates who were at Company A when sourced are now at Company B, with their old work email completely dead. Appending a verified personal email or cell phone for these candidates often reopens placements that were previously lost.
Source: Bullhorn Staffing Benchmark 2025; Cleanlist staffing customer data
How It Works
Export Candidate Contacts from Your ATS
Export candidate records from Greenhouse, Lever, Bullhorn, JobAdder, or any ATS as CSV. Include key fields: name, email, phone, company, title, and candidate status. Filter by last-contacted date to prioritize stale records.
Upload to Cleanlist for Verification
Upload your candidate CSV. Cleanlist auto-maps recruiting-specific fields and begins multi-layer verification: email deliverability, phone number validity, and employer currency checks.
Multi-Layer Email Verification
Each candidate email is checked for deliverability via SMTP validation, MX record lookup, catch-all detection, and disposable address filtering. Work emails at former employers are flagged as invalid with the reason noted.
Update Current Employer and Title
Cleanlist's enrichment layer updates current employer, job title, and company information — so your ATS reflects where candidates work now, not where they worked when they first entered your database.
Append Personal Contact Channels
For candidates whose work email is no longer valid, Cleanlist appends alternative contact methods: personal email (verified), direct cell phone, and updated LinkedIn profile URL. This gives recruiters a way to reach candidates who have changed jobs.
Re-Import Verified Data to Your ATS
Download the verified and enriched file in your ATS's import format. Cleanlist preserves candidate IDs and record structure so updates map cleanly back to existing candidate records without creating duplicates.
Key Benefits
98% Email Accuracy
Real-time email verification catches bounces, catch-alls, and disposable addresses before they cost you.
15+ Data Providers
Waterfall enrichment across multiple providers means higher match rates than any single-source tool.
No Code Required
Upload a CSV, connect your CRM, or use the API. Works however your team prefers.
30 Free Credits
Start enriching immediately. No credit card, no sales call, no commitment.
Manual Process vs Cleanlist
| Feature | Manual | Cleanlist |
|---|---|---|
| Candidate email freshness | Unknown until bounce | Real-time verification catches stale work emails |
| Current employer detection | Manual LinkedIn check per candidate | Automated employer/title update via enrichment |
| Personal email fallback | Not available | Verified personal email appended when work email fails |
| Cell phone number append | Rarely available in ATS data | Direct cell from 15+ providers (85% coverage) |
| Time to verify 5,000 candidates | Not feasible manually | Under 5 minutes |
| ATS re-import compatibility | N/A | Formatted for Greenhouse, Lever, Bullhorn, and CSV |
Frequently Asked Questions
How accurate is Cleanlist's data?
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Cleanlist achieves 98% email accuracy through real-time verification and cross-referencing across 15+ data providers. Every record is validated before delivery.
How many free credits do I get?
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Every new account starts with 30 free credits. Each credit processes one record (enrichment, verification, or lookup). No credit card required to start.
What data providers does Cleanlist use?
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Cleanlist uses waterfall enrichment across 15+ providers including major B2B data sources. The system automatically selects the best provider for each record to maximize match rates.
Can I connect my CRM?
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Yes. Cleanlist integrates with HubSpot, Salesforce, and other CRMs. Enriched data syncs back automatically. You can also upload CSV files or use the REST API.
Does Cleanlist have good coverage for my industry?
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Cleanlist's waterfall approach queries 15+ specialized providers, ensuring strong coverage across industries. Match rates vary by segment but typically exceed 85% for B2B contacts.
Can Cleanlist detect when a candidate has changed jobs?
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Yes. Cleanlist's enrichment layer cross-references current employment data from multiple providers. If a candidate's work email is at Company A but their current employer is Company B, Cleanlist flags the discrepancy, updates the employer and title fields, and optionally appends the new work email. This is especially valuable for passive candidate databases that have not been maintained in 12+ months.
Does Cleanlist integrate directly with ATS platforms like Greenhouse or Lever?
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Cleanlist currently works with ATS platforms via CSV export and re-import. Export your candidate list from Greenhouse, Lever, Bullhorn, or any ATS that supports CSV export, enrich in Cleanlist, and re-import. The output file preserves your ATS field structure and candidate IDs for seamless re-import. Direct ATS integrations are on our roadmap.
Is it compliant to verify candidate email addresses?
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Email verification checks whether an email address is technically deliverable — it does not send unsolicited emails or access personal data. This is a standard data hygiene practice used by recruiting firms globally. For GDPR compliance, ensure you have a lawful basis for processing candidate data (typically legitimate interest for recruiting). Cleanlist does not store or share your candidate data.
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