Apollo.io
apollo.io
Contact database plus outbound engine
from $49/moFree plan
Clay
Spreadsheet that enriches leads from 100+ sources
Free plan availableLead GenerationSince 2017
from $149/moVisit clay.com
What Clay is
Row-by-row enrichment waterfall — pull a list, then chain data providers and AI research to fill in the fields, then push to your outbound tool.
People use it to
Current offers
Free plan
Free plan, no card required
Ongoing free tier published by the vendor. Limits vary by plan.
Clay alternatives
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