| 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. |
Open-source vector database designed for scalable similarity search with GPU acceleration and billion-scale vector support. |
| Pricing |
Freemium ($0-99/mo) |
Free (Free-$$$) |
| Key Features |
- Contact database
- email sequencing
- dialer
- LinkedIn integration
- buying intent signals
- data enrichment
- CRM sync
- lead scoring
|
- Open-source
- GPU acceleration
- Billion-scale
- Hybrid search
- Partition
- Multi-vector
- Zilliz Cloud
|
| Pros |
- Massive contact database
- Generous free tier
- All-in-one platform
- Good data accuracy
|
- Highly scalable
- GPU support
- Open-source
- Billion-scale
|
| Cons |
- Data can be outdated for smaller companies
- UI can feel cluttered
- Email deliverability issues at scale
|
- Complex setup
- Resource hungry
- Steep learning curve
- Operational overhead
|
