Apollo's free tier is popular but data quality drops sharply at scale. Apollo has 220M contacts but 60%+ are unverified emails. Inbound Labs mobile number coverage is 3× Apollo's.
| Feature | Apollo.io | Inbound Labs |
|---|---|---|
| Email verification method | Pattern matching (unverified) | 6-step SMTP verification ✓ |
| Email accuracy | ~70% at scale | 98% verified ✓ |
| Mobile coverage | ~20M | 60M direct dials ✓ |
| Data freshness | Monthly | Weekly ✓ |
| Pricing at scale | Free tier + $49–$99/mo (limits drop quality) | From $49/mo, consistent quality ✓ |
| API rate limits | Strict on all plans | 10k calls/mo (Growth), Unlimited (Enterprise) ✓ |
| Free trial | ✓ (limited) | ✓ 50 free credits |
| Chrome extension | ✓ | ✓ |
| GDPR compliant | ✓ | ✓ |
We believe in honest comparisons:
Apollo has a generous free tier that's great for individual prospectors just getting started
Apollo's built-in email sequencing tool means one less subscription for small teams
Apollo's community and content ecosystem is larger
Apollo's data quality drops at scale. If your bounce rate is climbing, it's time to switch.
Apollo's mobile coverage is ~20M. Ours is 60M with a 30% pick-up rate.
If you care about verified data over volume, Inbound Labs is built for you.