| Overview |
Apollo.io is an all-in-one sales intelligence and engagement platform with a database of over 275 million contacts. It combines prospecting, enrichment, and outreach automation in a single workflow. |
Purpose-built vector database API for similarity search and retrieval-augmented generation at production scale. |
| Pricing |
Freemium ($0-99/mo) |
Freemium ($-$$$$) |
| Key Features |
- Contact database
- email sequencing
- dialer
- LinkedIn integration
- buying intent signals
- data enrichment
- CRM sync
- lead scoring
|
- Vector search
- Serverless
- Sparse-dense
- Metadata filtering
- Namespaces
- Collections
- Hybrid search
|
| Pros |
- Massive contact database
- Generous free tier
- All-in-one platform
- Good data accuracy
|
- Easy to use
- Fully managed
- Fast queries
- Good documentation
|
| Cons |
- Data can be outdated for smaller companies
- UI can feel cluttered
- Email deliverability issues at scale
|
- Can be expensive
- Vendor lock-in
- Limited query features
- No self-hosting
|
