Enrich Your Prospect List with Verified Data
Enrich Your Prospect List with Cleanlist's waterfall enrichment. Upload a CSV or connect your CRM — 30 free credits to start.
Start Free — 30 CreditsThe Problem
Prospect lists are only as good as the data they contain, yet most B2B teams build lists from a single source — a LinkedIn Sales Navigator export, a purchased list, or a manual spreadsheet — and send outreach without enrichment or verification. SalesHacker's 2025 Outbound Benchmarks found that single-source prospect lists have an average 62% email accuracy and only 34% phone coverage. This means roughly 4 in 10 emails on your prospect list will bounce or land in spam, and 7 in 10 contacts lack a phone number for follow-up. The result is a sequence that feels comprehensive on paper but reaches less than half of your total addressable prospects.
How Cleanlist Solves This
Cleanlist transforms raw prospect lists into outreach-ready databases by running waterfall enrichment across 15+ data providers. Upload your prospect list as a CSV and Cleanlist adds verified email addresses, direct dial phone numbers, job titles, company firmographics, and technology stack data. Every appended email is validated in real-time, every phone number is checked for active status and DNC compliance, and duplicate prospects are detected and merged. The output is a single, deduplicated, enriched list ready for import into your outreach tool.
Single-Source Prospect Lists Miss 38% of Valid Contacts — How Waterfall Enrichment Closes the Gap
When sales teams build prospect lists from a single data source (LinkedIn, Apollo, ZoomInfo, or a purchased list), they are working with incomplete coverage. No single B2B data provider has comprehensive coverage across all companies, titles, and geographies. Cleanlist analyzed 50,000 prospect records across five common single-source tools and found that each source covered an average of 62% of contacts with verified emails. The gaps were not random — they were systematically concentrated in specific segments. LinkedIn-sourced lists had weak coverage for companies under 50 employees. ZoomInfo had gaps in European markets. Apollo underperformed for non-tech industries. By running the same 50,000 records through Cleanlist's 15-provider waterfall, verified email coverage increased to 91% — a 47% improvement over the single-source average. The incremental contacts were disproportionately valuable: 68% held director-level or above titles, and 44% were at companies that had been invisible in the original single-source list.
How It Works
Upload Your Prospect List
Upload a CSV with any combination of company names, domains, contact names, or partial data. Cleanlist auto-maps columns and identifies what fields can be enriched.
Select Enrichment Fields
Choose which data points to add: verified email, direct dial phone, job title, company size, revenue, industry, technology stack, LinkedIn URL, and more.
Run Waterfall Enrichment
Cleanlist queries 15+ data providers in sequence for each record. If Provider A does not have an email, Provider B tries. This cascade continues until the best available data is found.
Review Match Rates and Confidence Scores
Preview enriched results with match rates by field. Each data point includes a confidence score so you can set quality thresholds for your outreach.
Deduplicate and Clean
Fuzzy matching detects duplicate prospects across name, email, and company variations. Duplicates are merged into a single record with the most complete data.
Export or Push to Outreach Tool
Download the enriched list as CSV or push directly to Outreach, Salesloft, HubSpot, or Salesforce. Records include enrichment timestamps and source confidence levels.
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 |
|---|---|---|
| Email match rate | 62% from single-source list | 91% via 15+ provider waterfall |
| Phone number coverage | 34% (if included at all) | 85% with direct dial prioritization |
| Firmographic data included | Rarely (requires separate research) | Company size, revenue, industry, tech stack |
| Duplicate detection | Manual spreadsheet comparison | Automatic fuzzy matching |
| Time to enrich 5,000 prospects | 25-50 hours of manual research | Under 3 minutes |
| Cost per enriched record | $1-5 (manual research time) | Starting at $0.10/credit |
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.
How long does it take to enrich my data?
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Most jobs complete in under 2 minutes for up to 10,000 records. Larger files are processed in batches with progress updates.
What data points can Cleanlist add to my prospect list?
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Cleanlist can append: verified email address, direct dial phone number, mobile number, job title, company name, company domain, employee count, annual revenue, industry, technology stack, LinkedIn URL, and location. Each field is sourced from the best available provider in the waterfall and includes a confidence score.
How accurate is the enrichment?
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Cleanlist achieves 98% email accuracy through real-time SMTP verification and 92% phone accuracy through carrier validation. Firmographic data (company size, revenue, industry) is cross-referenced across multiple sources for consistency. Match rates vary by segment but typically exceed 85% for US B2B contacts at companies with 10+ employees.
Can I enrich a prospect list with only company names?
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Yes. If you upload a list with only company names or domains, Cleanlist can find and enrich contact records for specified title levels at each company. You can filter by job title, seniority level, or department to target the right decision-makers at each organization.
Ready to enrich your prospect list?
Start with 30 free credits. No credit card required. See results in under 2 minutes.
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