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Apollo.io vs ZoomInfo

The same facts the Atlas reads for every tool, side by side, each with its page and date. No winner: which fits depends on the job.

Apollo.io logoApollo.ioapollo.ioUnifies prospect data and runs background agents to automate outreach, research, and meeting booking across sales tools.From $49/moWidely usedActively maintainedZoomInfo logoZoomInfozoominfo.comSales intelligence platform with a database of companies and contacts, buying signals and prospecting tools.Contact salesWidely usedActively maintained
Where they differcomputed from the facts below

Where they differ

Apollo.io≈ 108.1K
ZoomInfo≈ 7.3M

visits a month · estimate · log scale

  • 67×ZoomInfo gets about 67× the visits of Apollo.io.visit estimates, read 2026-09-17
  • SOC 2Both name SOC 2 on their pages.their trust and security pages
Apollo.ioZoomInfo

Price & plans

Price & plansApollo.ioZoomInfo
PriceFree plan · From $49/mopricing page, read 2026-09-19Contact salespricing page, read 2026-10-03
Free planYespricing page, read 2026-09-19not on their pricing page
Paid plans from$49/mopricing page, read 2026-09-19not on their pricing page
Free trialnot on their pricing pagefree trialpricing page

Who it's for & what it does

Who it's for & what it doesApollo.ioZoomInfo
What it isUnifies prospect data and runs background agents to automate outreach, research, and meeting booking across sales tools.Sales intelligence platform with a database of companies and contacts, buying signals and prospecting tools.
ForGo-to-market teams building outbound sales motions and managing prospect dataSales and marketing teams building pipeline and finding qualified prospects
What people do with it
  • Research accounts and build prospect lists with AI agents
  • Write and send outreach campaigns from workspace or existing CRM tools
  • Enrich contact records with buying signals and company data
  • Find and prioritize high-fit accounts using buying signals
  • Enrich CRM records with verified contact and company data
  • Automate lead routing and follow-up workflows
How it runsHosted onlyHosted only
ShelfSalesSales

Use & momentum

Use & momentumApollo.ioZoomInfo
UseWidely usedWidely used
Visits≈ 108k visits/moestimate, read 2026-09-17≈ 7.3M visits/moestimate, read 2026-09-17
iPhone appnone foundiPhone & iPad · 4.6★ from 1k ratingsiPhone & iPad · updated 2026-08-25
ActivityActively maintainedsite updated yesterdayActively maintainedrelease 7 weeks ago

Your data & compliance

Your data & complianceApollo.ioZoomInfo
Trains AI on your dataYestheir wordsnot stated on the pages we read
CertificationsSOC 2 Type II · ISO 27001 · GDPR · PCI DSS · CCPAtheir wordsSOC 2 · ISO 27001 · ISO 27701their words
Trust centerSafeBasetrust centertheir owntrust center
Privacy policy updated2026-08-10privacy policy2025-10-13privacy policy

For developers: API & MCP

For developers: API & MCPApollo.ioZoomInfo
MCP serverio.github.apolloio/apollo-mcpchecked 2026-10-08io.github.Zoominfo/zoominfo-mcpchecked 2026-10-08
When we asked itanswers, requires sign-inanswers, requires sign-in
Status pagenone foundall systems operationalstatus.zoominfo.com

The company

The companyApollo.ioZoomInfo
Run byZenLeads, Inc.privacy policynot stated on the pages we read
Founded2015per Wikidata2000per Wikidata
Domain sincenot on record2003domain registered
People~850per their sitenot on record
HeadquartersSan Franciscoper WikidataVancouverper Wikidata
Questions this page answers
  • What is the difference between Apollo.io and ZoomInfo?

    Apollo.io: Unifies prospect data and runs background agents to automate outreach, research, and meeting booking across sales tools. ZoomInfo: Sales intelligence platform with a database of companies and contacts, buying signals and prospecting tools.

  • Which is more widely used, Apollo.io or ZoomInfo?

    Apollo.io: about 108k visits/mo; ZoomInfo: about 7.3M (estimates, 2026-09-17).

  • Do Apollo.io or ZoomInfo train AI on your data?

    Apollo.io: yes, in its own words: “We may use information collected through the Services, including Contributor Database records and Usage Data, to train internal models.” ZoomInfo: its pages do not say plainly.

How we read a tool

No votes, no reviews, no vendor claims. Every week a crawler reads each tool's own site and a few public registries, and the words on the card are bands over what it read.

  • Use: visits to the site (estimated), installs from npm and PyPI, presence in Chrome's usage report.
  • Activity: the newest release on GitHub, npm or PyPI; the newest dated page on the site; open roles on a public jobs board.
  • Price: the vendor's own pricing page, read with the date. A figure is printed only when it is on that page.
  • The line and the use cases are written by us from the homepage, one tool at a time, and refused when they repeat the vendor's marketing.

How AI assistants read each site — the reading vendors ask us about — is on each tool's own visibility page.