Alternatives · Updated Sep 2026
Apollo alternatives for B2B signal data
Apollo bundles a contact database with sequencing. For enrichment through an API, compare four data vendors and the Autobound Signal API, which returns dated events on a domain or contact.
What Apollo sells
- Apollo states it gives access to 240M contacts and 30M companies. apollo.io
- Apollo has a Starter plan that is free forever. apollo.io
- Apollo offers API access on its Custom plans. apollo.io
- Apollo integrates with Salesforce, HubSpot, Outreach, Salesloft, Marketo, SendGrid and email providers. apollo.io
5 options
Apollo alternatives compared
Facts from each vendor's public pages, read Sep 29, 2026. Each vendor links to its sources.
| Vendor | What it sells | Data types | Delivery | Pricing model | Best for |
|---|---|---|---|---|---|
| Autobound Signal APIOur product | 700+ signals across 35 signal types, one API. | Dated events on companies and contacts. | REST, GCS, flat file, MCP. | From $19, 2 credits per result. autobound.ai/pricing | Timing signals on target accounts. |
| ZoomInfozoominfo.com | An AI go-to-market platform for B2B sales, marketing, RevOps and customer success teams. | Contacts and companies (ZoomInfo states 500M+ contacts and 100M+ companies), plus intent and behavioral signals. | Apps, CRM and stack integrations, and headless access through GTM.AI. | Free to start, then consumption credits based on usage. | B2B teams with 100+ employees that run outbound, ABM and CRM data work. |
| Cognismcognism.comcognism.com/pricing | B2B contact data with phone-verified mobiles, a prospecting platform and CRM enrichment. | Emails, mobiles, job titles, work history, company revenue, headcount, HQ and technology usage. Intent data on the Pro plan. | Prospecting platform, CRM enrichment, and MCP and API access. | Seat subscription (5 seats included) with credits. 1 credit reveals 1 contact. | Teams that sell into Europe and need compliant contact data. |
| People Data Labspeopledatalabs.com | Person data sold through APIs, bulk data and data licensing. | Person records. Contact data is not included in the free plan. | APIs, bulk data and data licensing. | Free plan at $0/mo, Pro from $98/mo, Enterprise at custom pricing. Volume discounts as usage grows. | Teams that build a product on person data at scale. |
| Clearbit (HubSpot)clearbit.comknowledge.hubspot.com | Clearbit has joined HubSpot. Its data now enriches contact and company records inside HubSpot. | Lead, contact and account data, industry codes (NAICS, GICS, SIC), corporate hierarchies and IP-based visitor intent. | Inside the HubSpot CRM: automatic, continuous or manual enrichment, plus form shortening. | Sold through HubSpot. HubSpot states that data enrichment does not consume HubSpot Credits. | HubSpot users who want contact and company records filled in automatically. |
- Autobound Signal APIOur product
- What it sells
- 700+ signals across 35 signal types, one API.
- Data types
- Dated events on companies and contacts.
- Delivery
- REST, GCS, flat file, MCP.
- Pricing model
- From $19, 2 credits per result. autobound.ai/pricing
- Best for
- Timing signals on target accounts.
- ZoomInfozoominfo.com
- What it sells
- An AI go-to-market platform for B2B sales, marketing, RevOps and customer success teams.
- Data types
- Contacts and companies (ZoomInfo states 500M+ contacts and 100M+ companies), plus intent and behavioral signals.
- Delivery
- Apps, CRM and stack integrations, and headless access through GTM.AI.
- Pricing model
- Free to start, then consumption credits based on usage.
- Best for
- B2B teams with 100+ employees that run outbound, ABM and CRM data work.
- Cognismcognism.comcognism.com/pricing
- What it sells
- B2B contact data with phone-verified mobiles, a prospecting platform and CRM enrichment.
- Data types
- Emails, mobiles, job titles, work history, company revenue, headcount, HQ and technology usage. Intent data on the Pro plan.
- Delivery
- Prospecting platform, CRM enrichment, and MCP and API access.
- Pricing model
- Seat subscription (5 seats included) with credits. 1 credit reveals 1 contact.
- Best for
- Teams that sell into Europe and need compliant contact data.
- People Data Labspeopledatalabs.com
- What it sells
- Person data sold through APIs, bulk data and data licensing.
- Data types
- Person records. Contact data is not included in the free plan.
- Delivery
- APIs, bulk data and data licensing.
- Pricing model
- Free plan at $0/mo, Pro from $98/mo, Enterprise at custom pricing. Volume discounts as usage grows.
- Best for
- Teams that build a product on person data at scale.
- Clearbit (HubSpot)clearbit.comknowledge.hubspot.com
- What it sells
- Clearbit has joined HubSpot. Its data now enriches contact and company records inside HubSpot.
- Data types
- Lead, contact and account data, industry codes (NAICS, GICS, SIC), corporate hierarchies and IP-based visitor intent.
- Delivery
- Inside the HubSpot CRM: automatic, continuous or manual enrichment, plus form shortening.
- Pricing model
- Sold through HubSpot. HubSpot states that data enrichment does not consume HubSpot Credits.
- Best for
- HubSpot users who want contact and company records filled in automatically.
When Apollo is the better choice
Stay with Apollo if one of these is true.
Test the Signal API on your accounts
700+ signals across 35 signal types, one API. Dated events on any company domain or contact. From $19, 2 credits per result.
Start Free1,000 free creditsUse it in Claude via MCP
Questions
What are the alternatives to Apollo's data enrichment API?
Apollo puts API access on its Custom plans. People Data Labs sells person data through APIs and bulk files, Cognism includes API and MCP access in its plans, and Clearbit enrichment now runs inside HubSpot. The Autobound Signal API enriches a company domain or a contact with dated signals rather than contact fields.