Spec sheet · Data enrichment
Apollo.io
The short answer
B2B contact and company database with enrichment, sequencing and website visitor tracking.
On this page 4 sections
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Spec sheet
REF APOLLO-IO- Category
- Data enrichment and B2B data
- Database
- 240M+ contacts and 30M+ accounts (company figures)
- Enrichment
- Waterfall enrichment and regularly refreshed data
- Outreach
- Email sequences, parallel dialer, deliverability tools
- Integrations
- 200+ integrations, works from inside your CRM
- Free plan or trial
- Free sign-up, no credit card; plan limits on the vendor's site
- Starting price
- Not published clearly on the vendor’s site; check with Apollo.io.
What Apollo.io does
Apollo.io combines a large B2B database of companies and contacts with tools to search it, enrich CRM records, and run email and call sequences. It also offers website visitor tracking that matches visits to companies.
It is commonly used by small sales teams that want prospecting data and outreach in one place rather than separate tools. Data accuracy varies by region and company size, as it does for every database, so verify contacts before large sends.
A good fit for
- Small B2B sales teams starting outbound.
- Founders who want prospecting data and sequences in one tool.
- Teams filling gaps in CRM records.
Probably not for
- Teams that only want website visitor identification with no outreach.
- Regions and niches where the database has thin coverage; test a sample first.
Alternatives
- Bitscale: Waterfall enrichment across many providers inside your CRM.
- Leadfeeder: Company-level visitor identification.
- ZoomInfo: Enterprise B2B data.
Where we discuss Apollo.io
- Leadfeeder vs Apollo.io
- Apollo.io vs ZoomInfo: B2B data and prospecting
- Amplemarket vs Apollo.io for B2B prospecting
- Best website visitor identification tools for B2B (2026)
- Best cold email software with deliverability and analytics (2026)
- Leadfeeder alternatives: 6 options compared
- ZoomInfo alternatives: 5 options compared
- What is data enrichment? A plain guide for B2B teams
- How to identify companies visiting your website
This spec sheet is based on Apollo.io’s own published materials, read on 18 October 2026. We have not run the product in a live account, and features change; confirm anything important with the vendor. Apollo.io is a trademark of its owner; its mention here does not imply endorsement. See our editorial policy.