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Clay vs Apollo.io

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.

Clay logoClayclay.comCentralizes first and third-party data sources and enriches prospect lists for sales outreach campaigns.From $185/moWidely usedActively maintainedApollo.io logoApollo.ioapollo.ioUnifies prospect data and runs background agents to automate outreach, research, and meeting booking across sales tools.From $49/moWidely usedActively maintained
Where they differcomputed from the facts below

Where they differ

Clay≈ 297.4K
Apollo.io≈ 108.1K

visits a month · estimate · log scale

  • 2.8×Clay gets about 2.8× the visits of Apollo.io.visit estimates, read 2026-09-17
  • $49Apollo.io starts lower: $49/mo against $185/mo.pricing pages, read 2026-09-19 and 2026-09-19
  • FreeBoth have a free plan.pricing pages, read 2026-09-19 and 2026-09-19
  • SOC 2Only Apollo.io names SOC 2 on its pages.their trust and security pages
ClayApollo.io

Price & plans

Price & plansClayApollo.io
PriceFree plan · From $185/mopricing page, read 2026-09-19Free plan · From $49/mopricing page, read 2026-09-19
Free planYespricing page, read 2026-09-19Yespricing page, read 2026-09-19
Paid plans from$185/mopricing page, read 2026-09-19$49/mopricing page, read 2026-09-19
Free trialfree trialpricing pagenot on their pricing page
Paying yearlysave 10% yearlypricing pagenot on their pricing page

Who it's for & what it does

Who it's for & what it doesClayApollo.io
What it isCentralizes first and third-party data sources and enriches prospect lists for sales outreach campaigns.Unifies prospect data and runs background agents to automate outreach, research, and meeting booking across sales tools.
ForGo-to-market teams building prospecting workflows and enriching prospect dataGo-to-market teams building outbound sales motions and managing prospect data
What people do with it
  • Enrich prospect data from multiple providers in one workflow
  • Research and target companies and people with AI agents
  • Sync targeted audiences to LinkedIn, Meta, and Google ads
  • 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
How it runsHosted only · API · CLIHosted only
ShelfSalesSales

Use & momentum

Use & momentumClayApollo.io
UseWidely usedWidely used
Visits≈ 297k visits/moestimate, read 2026-09-17≈ 108k visits/moestimate, read 2026-09-17
ActivityActively maintainedrelease 3 days ago · site updated yesterdayActively maintainedsite updated yesterday

Your data & compliance

Your data & complianceClayApollo.io
Trains AI on your datanot stated on the pages we readYestheir words
CertificationsGDPR · CCPAtheir wordsSOC 2 Type II · ISO 27001 · GDPR · PCI DSS · CCPAtheir words
Trust centernone foundSafeBasetrust center
Privacy policy updatednot stated on the pages we read2026-08-10privacy policy

For developers: API & MCP

For developers: API & MCPClayApollo.io
MCP servernone in the MCP registryio.github.apolloio/apollo-mcpchecked 2026-10-08
When we asked itnone in the MCP registryanswers, requires sign-in
Status pagelinked from the homepagestatus.clay.comnone found

The company

The companyClayApollo.io
Run byClay Labs Inc.site footerZenLeads, Inc.privacy policy
Foundednot on record2015per Wikidata
Domain since1992domain registerednot on record
Peoplenot on record~850per their site
Raised$5Bper their About pagenot on record
HeadquartersSan Franciscoper their About pageSan Franciscoper Wikidata
Questions this page answers
  • What is the difference between Clay and Apollo.io?

    Clay: Centralizes first and third-party data sources and enriches prospect lists for sales outreach campaigns. Apollo.io: Unifies prospect data and runs background agents to automate outreach, research, and meeting booking across sales tools.

  • Which is cheaper, Clay or Apollo.io?

    Clay starts at $185/mo (pricing page, 2026-09-19); Apollo.io starts at $49/mo (pricing page, 2026-09-19). Plans and limits differ; both pages are linked above.

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

    Clay: about 297k visits/mo; Apollo.io: about 108k (estimates, 2026-09-17).

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

    Clay: its pages do not say plainly. 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.”

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.