Best Data Providers for Clay's Waterfall in 2026 (Ranked by Benchmark)
Clay tests every data provider in production. Here's the full ranking for email accuracy, EMEA phone coverage, and APAC coverage, based on Clay's official 2025 data tests.
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If you use Clay for B2B enrichment, choosing the right providers for your waterfall is one of the highest-leverage decisions you’ll make. The wrong order means paying for providers that fail on your ICP, and missing contacts that another provider would have found.
Clay runs continuous benchmarks across all providers in their marketplace. Here’s what the data actually shows.
What Clay’s Waterfall Benchmark Measures
Clay tests providers against the same set of contacts and records:
- Email confidence score: Percentage of found emails that are valid (not bounced)
- EMEA phone coverage: Number of mobile phones returned for European contacts
- APAC phone coverage: Number of mobile phones returned for Asia-Pacific contacts
- Match rate: Percentage of contacts for which at least one data point is returned
The benchmark uses real contacts from Clay’s production environment, not synthetic data. This makes it the most reliable independent comparison available.
Email Accuracy (Clay public data tests, 2025)
Top tier: up to 93% confidence score
A handful of providers cluster at the top of the confidence range, within a point or two of each other:
- Datagma : up to 93% confidence score in the regions tested
- Hunter.io : same range
- Icypeas : same range
- Prospeo : same range
What this means: At up to 93% confidence, for every 100 emails found, ~3 will bounce. This is the industry benchmark for “deliverable” data. Any provider below 90% will hurt your sender reputation.
Mid Tier: 88-94%
Several providers fall in the mid-range. Acceptable for low-volume outreach but will hurt deliverability at scale.
What to optimize for:
If email accuracy is your primary concern, any of the top-tier providers will give you equivalent results. The differentiator is then coverage (how many contacts they find) and pricing.
EMEA Phone Coverage Rankings
EMEA (Europe, Middle East, Africa) phone coverage is where most US-focused providers fall short. Clay’s benchmark tested the same list of European contacts across all providers.
Two caveats before reading any ranking. First, waterfall tools are not providers: BetterContact, FullEnrich, Surfe, Zeliq and Forager query several sources per lookup, so their raw coverage is mechanically higher, putting them in the same column as a single provider tells you nothing. Second, Clay publishes coverage and quality; ranking on coverage alone rewards whoever returns the most numbers, valid or not.
Ranked on quality × coverage, single providers only:
| Rank | Provider | Position in Clay’s European country views |
|---|---|---|
| #1 | Datagma | Best single-provider result on quality × coverage |
| #2-3 | Other single providers | Close, region-dependent |
| Lower | US-centric providers | Coverage drops sharply on European contacts |
Cognism and Kaspr have real EMEA coverage but do not appear in Clay’s published tables, so they cannot be ranked here.
Key insight: Datagma is the strongest single provider on European mobile in Clay’s public data, and the only one at that level with transparent pricing (from $49/mo). Enterprise providers with comparable coverage charge 10-20x more.
APAC Phone Coverage Rankings
Asia-Pacific coverage is often overlooked but critical for teams targeting India, Australia, Singapore, Japan, and Southeast Asia.
Across the five regions Clay tests, Datagma places top 3 among single providers in every one of them, reaching 89.5% quality and 93.3% coverage in its best region. Very few providers hold that consistency outside Europe and North America.
Key insight: most US-centric providers have very limited APAC data. If your ICP includes India or APAC markets, Datagma is one of the few providers that delivers there at all.
Why Waterfall Position Doesn’t Equal Quality
A common misconception: if a provider is in tier 3-4 of a waterfall, it must be lower quality than tier 1-2.
This is wrong. Waterfall position is determined by cost, not quality.
Clay’s waterfall is optimized to find data at the lowest cost. Clay tries cheaper providers first. When they return empty, it falls to the next tier. Premium providers (those with higher per-contact costs) end up in later tiers because Clay tries to minimize cost before calling them.
Datagma is in tier 3-4 not because of quality issues, but because it’s priced at premium levels. When cheaper providers fail, Datagma delivers. This is exactly why Clay’s Head of Ops (Varun Anand) described Datagma’s data as “transformative.”
How to Configure Your Clay Waterfall
For Email Enrichment
Best configuration for email accuracy + coverage:
- Tier 1: DropContact or Apollo (high match rate, lower cost)
- Tier 2: Hunter.io or Prospeo (up to 93% accuracy, moderate cost)
- Tier 3: Datagma (up to 93% accuracy, catches what tier 1-2 missed)
For EMEA-focused lists, add Datagma earlier in the waterfall for European contacts.
For Phone Enrichment (EMEA-focused)
- Tier 1: Kaspr (strong professional profile coverage)
- Tier 2: Datagma (best single-provider mobile coverage, $0.28/phone direct)
- Tier 3: Cognism (highest coverage, highest cost, use as final fallback)
For Phone Enrichment (APAC-focused)
- Tier 1: Datagma (top 3 among single providers in every region tested)
- Tier 2: A second APAC-focused provider as fallback
Datagma should be tier 1 or tier 2 for APAC, there are very few providers with comparable coverage.
Using Datagma Directly vs Through Clay
If you heavily rely on Datagma data (EMEA or APAC contacts), consider accessing Datagma directly via their API instead of exclusively through Clay’s waterfall.
Why direct access makes sense:
- No waterfall markup: Clay adds margin to provider costs. Direct = lower per-unit cost.
- First-call priority: Instead of calling Datagma as a fallback, make it your first enrichment step.
- More control: Test different parameters (professional profile URL vs name search) without Clay’s abstraction.
Datagma’s direct API costs from $0.28/phone (Popular plan at $99/mo with 250 phones). Through Clay, the same data comes at Clay’s credit pricing plus your Clay subscription.
The Key Metrics: What to Look For in a Clay Provider
When evaluating providers for your Clay waterfall, prioritize:
- Email confidence score: 90%+ for primary providers, below that, deliverability suffers
- Match rate on your ICP: Test against 100 contacts from your actual target list
- Cost per verified contact: Calculate price ÷ match rate
- Coverage for your geography: Use Clay’s benchmark data as starting point, then test
The Clay benchmark gives you a solid baseline. But your specific ICP will have different characteristics, always validate with your own contacts before committing to a configuration.
Frequently Asked Questions
How often does Clay update their benchmark?
Clay runs continuous benchmarks in production. The data reflects real usage, not a one-time test. The 2025 data tests are the most recent public reference.
Which provider has the best email accuracy in Clay?
No single provider owns that spot. Datagma, Hunter.io, Icypeas and Prospeo all sit in the same top band, up to 93% confidence. At that level email is close to a commodity, the real separation between providers happens on phone coverage.
Why is Datagma in tier 3-4 if it has up to 93% accuracy?
Waterfall position in Clay is determined by cost, not quality. Clay tries cheaper providers first to minimize enrichment costs. Datagma’s premium pricing puts it later in the waterfall despite having top-tier accuracy.
Can I use multiple providers in the same Clay table?
Yes. Clay’s waterfall is designed for this. You add providers in priority order, and Clay calls the next tier when the previous returns empty.
Is Datagma available as a native Clay integration?
Yes. Datagma is a native Clay provider. Add your API key in Clay’s integrations settings and it’s available immediately in any table.