You pull a lead list, send emails — half of them bounce. You call a number and hear "that person left the company." The most obvious yet most painful problem in outbound sales: data quality.
What is this?
Clay is a data enrichment + workflow automation platform for B2B sales teams. Over 300,000 GTM teams use it, and it holds a 4.9/5 rating on G2.
It looks like a spreadsheet on the surface, but underneath, 150+ data providers are connected. Apollo, Clearbit, Hunter, People Data Labs, Prospeo, and more — instead of using each one separately, Clay automatically searches them in order. This is called Waterfall Enrichment.
The principle is simple. If the first data source doesn't find an email, try the second. If the second doesn't either, try the third... It keeps searching in the order you set until it finds the data, then stops. A single source typically has a 35–52% match rate, but with the waterfall approach, it goes above 85%. In actual testing, running a waterfall of Hunter → Apollo → Prospeo → Clearbit on 200 LinkedIn Sales Navigator leads pushed the email discovery rate from 40% to 78% — nearly double.
Then there's Claygent, an AI research agent. Claygent browses the web directly, analyzing company websites, summarizing recent news, extracting pain points from job postings, and finding personalization hooks from LinkedIn activity. It captures the contextual information that structured databases miss.
Waterfall enrichment in one line
"Using a single data source means missing 48–65% of your leads. Waterfall searches multiple sources sequentially to fill that gap."
Another powerful feature is the AI Formula Generator. Describe in plain English something like "flag companies with 50+ employees that are Series B or later," and Clay creates the filter formula for you. You can set up complex conditions without knowing spreadsheet functions.
What changes?
"Can't I just use Apollo?" That's the most common question. Apollo is a great tool — it has a database of 275M+ contacts with built-in sequence automation. But the approaches are fundamentally different.
| Comparison | Apollo | Clay |
|---|---|---|
| Data sources | 1 proprietary DB (275M+ contacts) | 150+ external data providers connected |
| Enrichment method | Single source lookup | Waterfall (sequential multi-source search) |
| Email match rate | 40–52% | 78–85%+ |
| AI features | Auto email sequence generation | Claygent (web research) + AI formula generator + email personalization |
| Integrations | 18 (HubSpot, Salesforce, etc.) | 50+ (CRM, email tools, ad platforms) |
| Outreach execution | Built-in (email sequences, calls) | External integration (Smartlead, Instantly, etc.) |
| Pricing (base) | $49/user/mo (Basic) | $185/mo (Launch, credit-based) |
| Best for | All-in-one sales platform (lead gen → outreach) | Maximizing data quality + custom workflows |
Here's the bottom line: Apollo is "do everything with one tool", Clay is "push data quality to the absolute limit". That's why in practice, many teams use both — build and enrich lists in Clay, then run sequences through Apollo or Smartlead.
2026 RevOps reality
Deployed AI agents but not seeing results? Most likely it's a data problem. On bad data, AI just produces wrong results faster. If you invested in AI in 2025, 2026 is the year to invest in data quality infrastructure.
The essentials: how to get started
- Get a feel with a free account
Sign up at clay.com and you get 100 free credits per month. Use them to get familiar with the interface. It looks like a spreadsheet, but the depth inside is on a completely different level from Excel. - Set up your first waterfall enrichment
Import a lead list, hit the "Enrich" button, and set up data sources in order. Recommended sequence: Hunter → Apollo → Prospeo → Clearbit. You'll find nearly 2x the emails compared to a single source. - Automate research with Claygent
Run Claygent on your enriched leads. Give it instructions like "3-line summary of this company's recent news" or "extract tech stack from job postings," and the AI browses the web to fill in the information. - Connect to your CRM/outreach tool
Sync Clay data to HubSpot or Salesforce. Automatic CRM sync is available from the Growth plan ($495/mo). For outreach execution, keep using your existing tools like Apollo, Smartlead, or Instantly. - Monitor credit consumption
Clay's biggest pitfall is unpredictable credit usage. Start with small lists (50–100 people) to understand consumption per waterfall step. The 2026 pricing update reduced data costs by 50–90%, so the barrier to entry is much lower now.
