Compare outreach tools.

Comparison of Apollo, Clay, ZoomInfo Sales

Compare by	ApolloB2B data and sales engagement in one platform	ClayGTM data enrichment and workflow orchestration	ZoomInfo SalesEnterprise B2B data, intent, and sales workflows
Best for	Teams that want data and sequencing together	GTM engineers building custom data workflows	Enterprise teams buying data, intent, and workflow depth
Channels	Cold emailMultichannelSales engagementContact data	Contact dataSales engagement	Contact dataSales engagementMultichannel
Pricing model	Free tier + paid plans	Credits + subscriptions	Custom quote
Deployment	Cloud platform + extension	Cloud platform	Cloud platform + extension + API
Core capabilities	B2B database Email sequencing Dialer CRM enrichment	Data waterfalls Enrichment AI research Workflow integrations	B2B database Intent data Enrichment Engagement workflows
Where it stands out	Broad prospecting and engagement coverage Reduces the need for a separate data vendor	Extremely flexible data orchestration Can combine many providers in one workflow	Very broad enterprise data surface Signals and workflow products can be consolidated
What to check first	Credit rules can make total cost harder to model Contact data should still be verified before high-volume sending	Credit usage and workflow complexity need active management Usually requires a separate sending layer	High-cost and complex procurement Data coverage should be validated by market
Source check	Vendor documented · checked 2026-09-17 Read profile →Vendor source ↗	Vendor documented · checked 2026-09-17 Read profile →Vendor source ↗	Vendor documented · checked 2026-09-17 Read profile →Vendor source ↗

Best for

Apollo

Teams that want data and sequencing together

Clay

GTM engineers building custom data workflows

ZoomInfo Sales

Enterprise teams buying data, intent, and workflow depth

Channels

Apollo

Cold emailMultichannelSales engagementContact data

Clay

Contact dataSales engagement

ZoomInfo Sales

Contact dataSales engagementMultichannel

Pricing model

Apollo

Free tier + paid plans

Clay

Credits + subscriptions

ZoomInfo Sales

Custom quote

Deployment

Apollo

Cloud platform + extension

Clay

Cloud platform

ZoomInfo Sales

Cloud platform + extension + API

Core capabilities

Apollo

• B2B database
• Email sequencing
• Dialer
• CRM enrichment

Clay

• Data waterfalls
• Enrichment
• AI research
• Workflow integrations

ZoomInfo Sales

• B2B database
• Intent data
• Enrichment
• Engagement workflows

Where it stands out

Apollo

• Broad prospecting and engagement coverage
• Reduces the need for a separate data vendor

Clay

• Extremely flexible data orchestration
• Can combine many providers in one workflow

ZoomInfo Sales

• Very broad enterprise data surface
• Signals and workflow products can be consolidated

What to check first

Apollo

• Credit rules can make total cost harder to model
• Contact data should still be verified before high-volume sending

Clay

• Credit usage and workflow complexity need active management
• Usually requires a separate sending layer

ZoomInfo Sales

• High-cost and complex procurement
• Data coverage should be validated by market

Source check

Apollo

Vendor documented · checked 2026-09-17

Read profile →Vendor source ↗

Clay

Vendor documented · checked 2026-09-17

Read profile →Vendor source ↗

ZoomInfo Sales

Vendor documented · checked 2026-09-17

Read profile →Vendor source ↗

Use this as a shortlist, not a final verdict. Pricing and limits change, so confirm the details with the vendor and test each product with your own workflow.