Apollo.io
Customer.io
| Feature | Apollo.io | Customer.io |
|---|---|---|
| Pricing | Free / from $49/mo | From $100/mo |
| Free Plan | ✓ Yes | ✗ No |
| Rating | 4.4 / 5 | 4.4 / 5 |
| Best For | sales-teams, startups, recruiters, agencies, b2b-companies | saas-companies, product-marketers, growth-teams, data-driven-teams |
| Founded | 2015 | 2012 |
| Contact Database | ✓ | ✗ |
| Email Sequences | ✓ | ✗ |
| Linkedin Integration | ✓ | ✗ |
| Dialer | ✓ | ✗ |
| Analytics | ✓ | ✗ |
| Lead Scoring | ✓ | ✗ |
| Enrichment | ✓ | ✗ |
| Event Triggers | ✗ | ✓ |
| Segmentation | ✗ | ✓ |
| Multi Channel | ✗ | ✓ |
| A B Testing | ✗ | ✓ |
| Data Pipelines | ✗ | ✓ |
| Reporting | ✗ | ✓ |
✓ Apollo.io Pros
- 275M+ verified contacts database
- Email sequences with A/B testing
- Free tier with 10,000 credits/month
- LinkedIn integration for prospecting
✗ Apollo.io Cons
- Data accuracy varies by region
- Email deliverability can suffer at scale
- Learning curve for sequence optimization
✓ Customer.io Pros
- Powerful event-driven automation
- Good segmentation
- Multi-channel messaging
- Developer-friendly
✗ Customer.io Cons
- Expensive for small lists
- Steep learning curve
- Email editor less visual
The Verdict
Apollo.io is built for sales teams and startups, with a focus on contact-database and email-sequences. Customer.io targets saas companies and product marketers and leads with event-triggers and segmentation.
On pricing, Apollo.io is the clear winner for budget-conscious users — starting at $49/mo compared to $100/mo for Customer.io. That $51/mo difference adds up quickly for growing teams.
Apollo.io has a free plan, which gives it a meaningful edge for individuals and small teams exploring their options. Customer.io requires a paid subscription from day one.
Feature-wise, Apollo.io offers broader built-in capabilities (7 features vs 6), while Customer.io takes a more focused approach — which can mean a simpler, faster onboarding experience.
This is a genuinely close comparison. If you can, sign up for both free trials (where available) and run a one-week test with your actual team tasks before deciding.