Tool comparison · Head to headUpdated 9/1/2026
Apollo.io vs TheirStack
A factual comparison of features, pricing, and capabilities.
01The contenders
Apollo.io
All-in-one sales intelligence platform with 210M+ contacts, AI-powered campaigns, and built-in email sequencing.
Starting atCustom0
02Line by line
Pricing comparison.
Monthly rates shown. Annual billing may offer discounts. Visit official sites for current pricing.
03Capabilities
Feature comparison.
| Feature | Apollo.io | TheirStack |
|---|---|---|
| 210M+ contacts database | ||
| 30M+ companies | ||
| AI-powered multichannel campaigns | ||
| Email deliverability guardrails | ||
| Anonymous visitor identification | ||
| Real-time form enrichment | ||
| Contact and company enrichment | ||
| Advanced filtering | ||
| CRM data cleansing | ||
| Pipeline boards | ||
| Job search | ||
| Company search | ||
| Company lookup | ||
| Enrichment | ||
| Exports | ||
| Email alerts | ||
| Webhooks | ||
| MCP server |
Available
Partial/Limited
Not Available
04Ecosystem
Native integrations.
Apollo.io
SalesforceHubSpotOutreachSalesLoftMarketoSendGridLinkedIn
TheirStack
ClayLinkedIn AudiencesMakeN8NZapier
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Information gathered from official sources and may change. Pricing and features last verified 9/1/2026. Please visit the official websites for the most current information.