AI Tool Comparison
Apollo.io vs Clay
A side-by-side breakdown to help you pick the right tool for your workflow.
Apollo.io
Find and contact prospects from a large B2B contact database with built-in outreach and engagement tools. Sales teams work from one platform instead of stitching data and sequencing together.
Clay
Pull, enrich, and act on contact and company data through one workflow builder connecting dozens of data providers and AI models. New Actions + Data Credits pricing split platform usage from enrichment cost.
Bottom Line
Last reviewed: August 2026
Apollo.io and Clay both compete in Marketing, overlapping most directly on marketing. Clay carries the higher rating (4.7 vs 4.6), but a gap that size rarely overrides a real workflow fit on its own.
Choose Apollo.io if…
Best for sales teams building prospect lists and outreach sequences from verified contact data, and its edge is a database of 275+ million contacts with enriched emails, phone numbers, and technographic data built in. The default sales prospecting tool once you need real contact data behind your outreach, not just a sequencer.
Choose Clay if…
Best for go-to-market teams that need enriched, verified prospect data pulled from many sources at once, and its edge is 75+ data providers combined into one pipeline that resolves conflicts and produces a single clean record. The most powerful enrichment tool on the market, expensive and credit-hungry enough that it rewards a team that already knows what it's doing.
| Attribute | Apollo.io | Clay |
|---|---|---|
| Category | Marketing | Marketing |
| Pricing | freemium | freemium |
| Pricing Detail | Free / $49/user/mo Basic / $79/user/mo Professional | Free (500 actions) / $167/mo Launch / $446/mo Growth |
| Rating |
Key Features
Apollo.io
- 275M+ contact database
- AI email sequences
- Conversation intelligence
- Lead scoring
- CRM integration
Clay
- 100+ data source enrichment
- AI message personalization (Claygent)
- Waterfall enrichment logic
- CRM sync
- Website visitor identification
Pros
Apollo.io
- •Massive verified contact database
- •sequence personalization
- •Strong LinkedIn extension
- •Good free tier for prospecting
Clay
- •Best-in-class data enrichment
- •Hyper-personalization at scale is real
- •Replaces multiple data tools
- •Fastest-growing GTM tool
Cons
Apollo.io
- Data accuracy varies by industry
- Can get expensive for full features
- UI can be overwhelming
Clay
- Expensive and credit-hungry
- Steep learning curve
- Requires good list to start with