Lead Enrichment Tools: Clay vs Clearbit vs FullEnrich (2026)

By Mitchell Keller, Founder & CEO, LeadGrow. Managed 3,626+ cold email campaigns. 6.74% average reply rate. 2,230+ meetings booked in 2025.

What enrichment is and why it matters

Enrichment takes a basic data point (a name, a LinkedIn URL, a company domain) and fills in the rest. Job title. Direct email. Phone number. Company size. Tech stack. Funding history. Revenue range.

Without enrichment, you have a list of names. With enrichment, you have a list of targetable, contactable prospects with enough context to write relevant outreach.

The quality of your enrichment directly determines two things: how many people you can actually reach (email coverage rate) and how relevant your messaging can be (data completeness). We've managed 3,626+ campaigns and the pattern is consistent. Teams that invest in multi-source enrichment get 20 to 40% more contactable prospects from the same raw list compared to teams using a single data provider. See our prospect list building guide for how enrichment fits into the full list building workflow.

That's the difference between a campaign that contacts 3,000 prospects and one that contacts 5,000 from the exact same starting point. Same targeting criteria. Same ICP. Just better data coverage.

The three contenders

Clay: the GTM automation platform

Clay isn't just an enrichment tool. It's a full GTM automation platform that happens to have the most comprehensive enrichment capabilities on the market.

What Clay does:

• Pulls data from 75+ providers in a waterfall sequence (if source 1 doesn't have the email, it tries source 2, then source 3, and so on)
• Claygent (AI research agent) that can visit websites, read pages, and extract specific information you define
• Table-based workflow builder for creating custom enrichment logic
• Native integrations with Apollo, Hunter, Clearbit, Lusha, RocketReach, and dozens more
• AI-powered data normalization (standardizing titles, matching companies, deduplication)

Pricing: Starts at $134/month for 2,000 credits. Credits are consumed per enrichment action (one credit per data lookup from one provider). A waterfall enrichment that checks 5 providers for one email uses 5 credits. At scale, credits add up fast. Heavy users spend $500 to $2,000+/month.

Learning curve: Steep. Clay's flexibility means there are hundreds of ways to set up a workflow. Getting the most out of it requires understanding how to chain data sources, set up conditional logic, and build efficient waterfall sequences. Plan for 2 to 4 weeks of learning before you're running optimized workflows.

Our take: We use Clay as our primary enrichment platform across all client campaigns. For a tutorial on building these workflows, see our Clay situation targeting guide. The multi-source waterfall is the single biggest factor in our data coverage rates. When we pull from 7+ sources per lead for enterprise targets, we consistently hit 70 to 85% email coverage. Single-source tools typically give us 40 to 55%.

Clearbit (now Breeze by HubSpot)

Clearbit was the original B2B enrichment tool. HubSpot acquired them in 2023 and rebranded to Breeze. The product is now deeply integrated into the HubSpot ecosystem.

What Clearbit/Breeze does:

• Real-time enrichment that auto-populates when a new contact enters HubSpot
• Company and contact data (firmographics, technographics, funding data)
• Reveal (identify anonymous website visitors and match to companies)
• Form shortening (pre-fill form fields with enriched data to reduce friction)
• ICP scoring based on enriched attributes

Pricing: Bundled into HubSpot's higher-tier plans. Standalone access is increasingly limited. If you're not on HubSpot, Clearbit's value proposition weakens significantly.

Learning curve: Low if you're already on HubSpot. The enrichment happens automatically. Configuration is straightforward through the HubSpot UI.

Our take: Clearbit is a good enrichment layer for inbound-focused teams already on HubSpot. For outbound cold email, it has two problems. First, it's a single data source. You're relying on Clearbit's database alone, which means lower coverage than a multi-source approach. Second, the HubSpot lock-in is real and accelerating. HubSpot is making Clearbit's standalone features harder to access and pushing users toward the full HubSpot suite. If you're not on HubSpot, this isn't the tool for you.

FullEnrich

FullEnrich runs waterfall enrichment across 15+ data providers. It's positioned as a simpler alternative to Clay for teams that want multi-source coverage without building complex workflows.

What FullEnrich does:

• Waterfall enrichment across 15+ email and phone data providers
• Simple upload and enrich workflow (CSV in, enriched CSV out)
• LinkedIn URL or company domain as input
• Automatic deduplication across sources
• Email verification built in

Pricing: Competitive with Clay on a per-contact basis. Credit-based system. Pricing varies by plan but generally cheaper than running the equivalent waterfall in Clay.

Learning curve: Low. Upload a list, click enrich, get results. Minimal configuration required.

Our take: FullEnrich is a good option for teams that want waterfall enrichment without Clay's complexity. The coverage is solid because it hits multiple providers. The limitation is flexibility. You can't build custom enrichment logic, use AI agents to research specific attributes, or chain enrichment into a larger automation workflow. For standard "give me the email and phone number" enrichment, it works well. For situation-based enrichment (extracting specific signals, classifying prospects into buckets, building custom data points), Clay is necessary.

Head to head comparison

Feature	Clay	Clearbit/Breeze	FullEnrich
Data sources	75+	1 (Clearbit database)	15+
Waterfall enrichment	Yes (customizable)	No	Yes (automated)
AI research agent	Yes (Claygent)	No	No
Starting price	$134/month	Bundled with HubSpot	$29/month
Learning curve	High	Low	Low
CRM integration	Many (via API/Zapier)	HubSpot native	API + CSV export
Custom workflow logic	Yes (full flexibility)	Limited	No
Real-time enrichment	Yes	Yes	Batch only
Email verification	Via integrations	Basic	Built in
Best for	Cold email teams, agencies	HubSpot-native teams	Simple waterfall needs

Our waterfall enrichment workflow

This is the workflow we run for client campaigns. It maximizes coverage while keeping costs manageable.

Step 1: Base data from Apollo or AI Arc. Start with a broad pull from Apollo ($0.03 to $0.05 per contact) or AI Arc (100x cheaper than Apollo with monthly data refresh). This gives you name, title, company, and a first-pass email for 50 to 60% of your list.

Step 2: Multi-source enrichment through Clay. The contacts that Apollo didn't have emails for go through Clay's waterfall. We typically chain 5 to 7 providers: Hunter, Lusha, RocketReach, Prospeo, Dropcontact, and others depending on the industry and geography. Each provider catches emails the previous ones missed. This step adds another 15 to 25% coverage.

Step 3: Claygent for custom data points. For high-value segments, we use Clay's AI agent to visit company websites, LinkedIn profiles, and other sources to extract specific signals. Things like: do they have public pricing? Are they hiring for roles that indicate our client's pain point? What technology do they mention on their careers page? These custom data points feed into our situation mining process.

Step 4: Manual review of top targets. For the top 100 to 200 prospects in any campaign (the highest-value accounts), a human reviews the enriched data. Confirms the person still holds the title. Checks for recent job changes. Validates that the situation signals are current. This takes 30 seconds per contact but prevents embarrassing mistakes on the prospects that matter most.

Step 5: Verification. Every enriched email goes through MillionVerifier ($0.0003 per email) for bulk cleaning. High-value segments get a second pass through ZeroBounce for AI scoring. Anything that comes back invalid gets removed before the list touches a sending tool.

Total coverage after this workflow: typically 70 to 85% email coverage, depending on the industry and seniority level. Compare that to 40 to 55% from a single data provider.

Cost optimization (Clay credits add up fast)

Clay's credit system is the most common surprise for new users. A waterfall enrichment that checks 7 providers for one contact uses 7 credits. At 2,000 credits per month on the starter plan, that's fewer than 300 contacts fully enriched. For serious cold email campaigns, you'll need the $314/month or higher plan.

Here's how to keep costs reasonable:

1. Filter before you enrich. Don't enrich your entire raw list. Filter by ICP criteria first (company size, industry, title) so you're only spending credits on contacts that could actually become prospects. A 50,000 contact raw list might filter down to 8,000 ICP-matched contacts. Enriching 8,000 is 6x cheaper than enriching 50,000.

2. Use Apollo or AI Arc as your first pass. These tools are cheaper per contact than Clay's credit system. Pull everything Apollo has first, then only send the remaining gaps to Clay's waterfall. This cuts Clay credit consumption by 40 to 60%.

3. Limit waterfall depth by segment. Not every contact needs 7 providers checked. For standard campaigns, 3 to 4 providers in the waterfall is sufficient. Reserve the deep 7+ provider waterfall for enterprise targets and small-TAM campaigns where coverage matters more than cost.

4. Cache and reuse enrichment results. Clay stores enrichment results in your tables. If you're running multiple campaigns targeting similar companies, check if you've already enriched those contacts before running new lookups. Deduplication before enrichment saves real money.

5. Monitor credit burn rate weekly. Set up alerts when you're approaching your monthly credit limit. It's easy to blow through credits on a large enrichment job and have nothing left for the rest of the month.

When to use each tool

Use Clay when:

• You run cold email campaigns and need maximum email coverage
• You want custom enrichment logic (conditional workflows, AI research, signal extraction)
• You're an agency managing multiple clients with different enrichment needs
• You need to integrate enrichment into a larger GTM automation workflow
• Data coverage directly impacts your revenue (the extra 20 to 30% coverage from multi-source enrichment justifies the cost)

Use Clearbit/Breeze when:

• You're already on HubSpot and want enrichment baked into your CRM
• Your primary motion is inbound (form shortening, website visitor identification, lead scoring)
• You don't need multi-source coverage (Clearbit's single database is sufficient for your TAM)
• Real-time enrichment at the point of lead capture is your primary use case

Use FullEnrich when:

• You want waterfall enrichment without Clay's learning curve
• Your enrichment needs are straightforward (email + phone, no custom signals)
• You're a small team that needs multi-source coverage without building complex workflows
• Budget is a primary constraint and you want competitive pricing with good coverage

The enrichment mistake that costs the most

Single-source enrichment. Using one data provider and accepting whatever coverage rate it gives you.

No single provider has complete coverage. Apollo might have 55% of your list. Hunter has a different 50% (with overlap). RocketReach has another 45%. The contacts each provider has aren't the same contacts. By combining sources, you capture the union of their databases.

We've tested this across hundreds of campaigns. Single-source enrichment gives us 40 to 55% email coverage. Multi-source waterfall (5+ providers through Clay) gives us 70 to 85%. That extra 25 to 30 percentage points of coverage means 25 to 30% more prospects contacted from the same raw list.

At a 6.74% average reply rate, those extra contacts translate directly into more replies and more meetings. On a 10,000 contact list, the difference between 55% coverage and 80% coverage is 2,500 additional contacts reached. At our average reply rate, that's roughly 168 additional replies. The cost of multi-source enrichment on those 10,000 contacts is a few hundred dollars. The value of 168 additional replies is orders of magnitude more.

Single-source enrichment is the most expensive way to save money in cold email. For a head-to-head comparison of the two most common base data sources, see our Apollo vs ZoomInfo breakdown.