In-depth two-product comparison
Clearbit vs Apollo
In-depth comparison of Clearbit and Apollo.io for B2B SaaS companies. We analyze enrichment, prospecting, API quality, pricing, and engagement features.
Last updated: 2026-03-15. Verify current features, pricing, limits, and integrations on official vendor pages.
Short answer
Clearbit wins for developer-led teams needing real-time API enrichment, PLG form shortening, and HubSpot integration. Apollo wins for teams needing a larger prospecting database plus built-in sales engagement (sequences, dialer) in one platform. Clearbit is an enrichment API. Apollo is an all-in-one sales tool. For post-sale lifecycle email, pair either with Sequenzy for billing-aware customer communication.
Clearbit
Developer-first enrichment API with HubSpot native integration
Apollo
All-in-one prospecting database plus sales engagement at accessible pricing
Quick comparison
| Decision area | Clearbit | Apollo | What to verify |
|---|---|---|---|
| Best For | Real-time API enrichment and PLG | All-in-one data + engagement | Test this with representative data and the next realistic usage tier. |
| Starting Price | Free (HubSpot), $99/mo (API) | Free plan, paid from $49/user/mo | Test this with representative data and the next realistic usage tier. |
| Database Size | ~50M+ companies (enrichment focus) | 275M+ contacts (prospecting focus) | Test this with representative data and the next realistic usage tier. |
| API Quality | Best-in-class developer API | Good REST API | Test this with representative data and the next realistic usage tier. |
| Sales Engagement | Not an engagement tool | Built-in sequences, dialer, tasks | Test this with representative data and the next realistic usage tier. |
| Real-time Enrichment | Core strength, sub-second | Batch enrichment | Test this with representative data and the next realistic usage tier. |
| HubSpot Integration | Native (part of HubSpot) | Strong integration | Test this with representative data and the next realistic usage tier. |
| Form Shortening | Core use case | Not a use case | Test this with representative data and the next realistic usage tier. |
| Free Plan | Free on HubSpot | Free with limited credits | Test this with representative data and the next realistic usage tier. |
| Onboarding Email | Not designed for this | Not designed for this | Test this with representative data and the next realistic usage tier. |
| Dunning | No | No | Test this with representative data and the next realistic usage tier. |
| Payment Integration | None | None | Test this with representative data and the next realistic usage tier. |
Feature comparison
| Feature | Clearbit | Apollo |
|---|---|---|
| Contact database | 5/10
Enrichment-focused, not prospecting DB | 9/10
275M+ contacts for prospecting |
| Company enrichment | 9/10
Real-time company data (size, funding, tech) | 7/10
Company data in database |
| Real-time API | 10/10
Sub-second enrichment, core strength | 5/10
Search API, not real-time enrichment |
| Email finding | 6/10
Prospector for finding contacts | 9/10
Built-in email finder with verification |
| Data enrichment | 10/10
Core product: best enrichment API | 8/10
Good enrichment from database |
| Sales sequences | 2/10
Not an engagement tool | 8/10
Multi-step with email, call, tasks |
| A/B testing | 0/10
Not applicable | 7/10
A/B testing on variants |
| Personalization | 9/10
Rich data for downstream personalization | 8/10
Variables with database data |
| Email warm-up | 0/10
Not applicable | 8/10
Built-in warm-up |
| Template management | 0/10
Not applicable | 7/10
Templates with AI writing |
| Built-in dialer | 0/10
Not a calling tool | 7/10
Built-in dialer |
| Direct dials | 5/10
Some in enrichment | 7/10
In database |
| Call recording | 0/10
Not applicable | 7/10
Call recording |
| Local presence | 0/10
Not applicable | 7/10
Available |
| Voicemail drop | 0/10
Not applicable | 6/10
Basic support |
| Enrichment analytics | 8/10
Match rates, API performance | 6/10
Basic enrichment metrics |
| Sequence performance | 0/10
Not applicable | 7/10
Step-level metrics |
| Lead scoring data | 9/10
Powers scoring in HubSpot | 7/10
Engagement-based scoring |
| Website visitors | 8/10
Reveal identifies visiting companies | 4/10
Limited |
| Revenue attribution | 5/10
Via downstream tools | 6/10
Basic sequence-to-meeting |
| HubSpot | 10/10
Native (part of HubSpot) | 8/10
Strong integration |
| Salesforce | 8/10
Strong enrichment integration | 7/10
Bidirectional sync |
| CRM enrichment | 9/10
Real-time on record creation | 7/10
Periodic enrichment |
| Form enrichment | 10/10
Core use case: shorten forms | 3/10
Not a use case |
| Two-way sync | 8/10
Strong sync with HubSpot | 7/10
Bidirectional available |
Pricing and operating cost
Clearbit
Free for HubSpot (basic enrichment). API from $99/mo.
API pricing scales with volume Prospector credits separate Best features HubSpot-exclusive Advanced plans expensive
Apollo
Free plan with limited credits and 250 emails/day.
Credit system can confuse Data accuracy varies Some features higher-tier only API access limited on starter
| Tier or usage case | Clearbit | Apollo |
|---|---|---|
| Starter | Free (HubSpot) / $99/mo HubSpot enrichment or 1,000 API enrichments/mo | $49/user/mo 10K credits/mo, sequences, dialer |
| Growth | $299/mo 5,000 enrichments/mo, reveal, prospector | $79/user/mo Unlimited credits, AI, intent data |
| Enterprise | Custom Custom volume, SLA, support | $119/user/mo Advanced security, API, custom reports |
Pros and cons
Clearbit
Pros
- Best-in-class developer API
- Free enrichment for HubSpot users
- Real-time sub-second enrichment
- Purpose-built for PLG form shortening
- Official SDKs in multiple languages
- Website visitor identification (Reveal)
- Native HubSpot integration
- Strong company data quality
Cons
- Not an engagement tool (no sequences, no dialer)
- Smaller contact database
- Increasingly HubSpot-centric
- No email warm-up
- No intent data
- Need separate outbound tool
- No billing integration for lifecycle
- API pricing can scale quickly
Apollo
Pros
- 275M+ contact database included
- Built-in engagement (sequences, dialer)
- Free plan available
- All-in-one (data + engagement)
- Email warm-up included
- Lower total cost for outbound
- Good CRM integrations
- Growing AI features
Cons
- API less developer-friendly than Clearbit
- No real-time enrichment API
- No form shortening capability
- Data accuracy varies
- No website visitor identification
- No billing integration for lifecycle
- Less suited for pure enrichment use cases
- Not designed for customer lifecycle
Who should choose what?
You need form enrichment and lead scoring on HubSpot.
Recommendation: Clearbit
You need data and engagement for cold outreach.
Recommendation: Apollo
You need onboarding, dunning, retention.
Recommendation: Apollo
You need a clean API for real-time data enrichment in your product.
Recommendation: Clearbit
You need to prospect and run sequences on a tight budget.
Recommendation: Apollo
You want to know which companies visit your site.
Recommendation: Clearbit
You need the most functionality per dollar.
Recommendation: Apollo
You need enrichment, outbound, and lifecycle email.
Recommendation: Apollo
Final verdict
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FAQ
Can Clearbit replace Apollo?
Not directly. Clearbit is an enrichment API. Apollo is an all-in-one data + engagement platform. If you only need enrichment, Clearbit works. If you need prospecting and sequences, you need Apollo or a separate engagement tool.
Can Apollo replace Clearbit?
For basic enrichment, yes. For real-time API enrichment, form shortening, and website visitor identification, Apollo does not have equivalents. Developer teams that rely on Clearbit API may find Apollo less suitable.
Can I use both together?
Yes. Some teams use Clearbit for real-time enrichment (forms, lead scoring) and Apollo for outbound prospecting. This gives best-of-both-worlds but adds cost.
Can I pair either with Sequenzy?
Yes. Use your data tool for enrichment/prospecting and Sequenzy for post-sale lifecycle email. They serve complementary purposes.
Which is free?
Both have free options. Clearbit is free for basic HubSpot enrichment. Apollo has a free plan with limited credits and 250 emails/day.
Which has the better API?
Clearbit has the better developer experience: cleaner design, official SDKs, better documentation, and faster response times.
Which is better for a PLG SaaS?
Clearbit for form shortening and lead scoring enrichment. Apollo if you also need outbound sales engagement.
Is Clearbit still standalone after HubSpot acquisition?
The API is still available as standalone, but new features increasingly favor HubSpot users. Long-term, expect deeper HubSpot integration.
Related reading: B2B email marketing guide , alternatives hub , and B2B SaaS tool stack .