Apollo.io
Sales intelligence and engagement platform providing B2B database, email sequencing, and sales automation with 275M+ contacts and 60M+ companies.
The problem it solves: I need an affordable database of company and contact intelligence to find, research, and email prospects at target businesses.
Our verdict: Apollo.io instead of SimilarWeb?
Switch if: Startups and SMB sales teams that want an affordable all-in-one B2B contact database plus built-in outbound sequencing.
Don’t switch if: Anyone seeking website traffic, channel, keyword, ad or app intelligence; Apollo is prospecting data, not competitive web analytics.
Biggest caveat: Users report 15-35% hard-bounce rates on contacts Apollo flags as 'verified,' monthly credits that expire, and frequent billing and account-suspension disputes (2.9/5 on Trustpilot versus 4.7/5 on G2).
Pricing Facts
Ratings Across the Web
Scores from public review platforms, checked 2026-07-12. We don't rate tools ourselves.
Does it replace SimilarWeb?
Apollo.io measured against the six things people actually use SimilarWeb for.
Features & Capabilities
Available Features
Pros & Cons
Pros
Cons
Best Use Cases
Target Audience
What Real Users Complain About
Negative feedback found on public platforms — because every tool has trade-offs, and vendors won't show you these.
“They suspended a premium paying customer account without proper explanation. There is no real support, only generic templated responses.”
“THEY JUST CONTINUE TO CHARGE YOUR CARD WITHOUT ANYWAY TO CANCEL. THEY SAY THAT YOU CAN 'TALK TO SALES' AND NOBODY EVER ANSWERS. ALL YOU GET IS AI OR SOMEONE WHO 'CAN'T MAKE THAT DECISION'.”
“Their system uploaded the same list twice and they charged me twice for the exact same list and refused to...”
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