Clay vs Apollo.io — both power B2B outbound, but in opposite ways. Apollo owns a 210M+ contact database and bundles outreach; Clay owns no data — it orchestrates 150+ providers (Apollo included) to maximize coverage and automate list-building. Pricing verified June 2026.
Quick verdict
- Choose Apollo.io if you want an affordable all-in-one — database, sequences, and a dialer — for SMB, email-led outbound, and you want to start fast.
- Choose Clay if you want maximum data coverage via waterfall enrichment across 150+ sources and programmatic, automated list-building — for ops-led teams at higher volume.
Side-by-side comparison
| Clay | Apollo.io | |
|---|---|---|
| Overall rating | 4.0/5 | 4.0/5 |
| Best for | Waterfall enrichment & automation | All-in-one database + outreach |
| Data model | Aggregates 150+ providers | Own 210M+ contact database |
| Outreach built in | No (integrates senders) | Yes (sequences + dialer) |
| Ease of use | Steep (Airtable-like) | Easy (productive day one) |
| Free tier | Limited | Yes |
| Entry paid | ~$185/mo | $49/user/mo |
| Best fit team | RevOps / ops-led, high volume | SMB SDRs / AEs |
| Full review | Clay review | Apollo.io review |
The bottom line
They are not mutually exclusive: many teams run Apollo standalone for simplicity and price, while higher-volume teams use Clay to waterfall across many providers (sometimes including Apollo’s own data) for the best coverage. Pick Apollo for simplicity and an all-in-one workflow; pick Clay for coverage, accuracy, and automation control. Both use credit-based pricing — forecast usage first, and see our best AI tools for outbound sales guide for the full stack.