
Surfe
Hublead.io
LinkTrack CRM
Dux Soup
Waalaxy
Breakcold
Phantombuster
Track LinkedIn invitations you sent and received: accepted, pending, declined, and your acceptance rate, automatically. Auto-sync, one-click push to CRM, CSV export. You decide what syncs. Chrome extension for SDRs, recruiters, and founders.

Which is more popular?
Based on our record, Apollo.io seems to be more popular. It has been mentioned 69 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | connectiontracker.org | apollo.io |
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| Platforms | — | |
| Company | — | Startup from the United States |
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What each product offers, as listed by its team.


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An editorial look at what each product does well and who it suits.


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Free software to find email addresses - apollo.io review
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The right Apollo alternative fixes the part of Apollo that costs you meetings. Bad data calls for a better database, and a missing channel calls for a specialist tool next to Apollo.
What is the best AI prospecting tool for B2B sales in 2026? The best tool depends on your team's specific situation. toflow.ai is a strong fit for multi-channel outreach across email, LinkedIn, and WhatsApp, and is...
Apollo is a full sales engagement platform — sequences, email tracking, dialer, and a contact database. Their strength is email addresses, not phone numbers. Phone number coverage exists but it's thinner than...
Recommendations tracked on public social media and blogs since March 2021.


Tracking ConnectionTracker since Aug 2026.
Personal email domains destroy this. Clearbit's Enrichment API returns a null company when it hits gmail.com. Apollo routes personal domains straight to a consumer bucket and skips B2B fields entirely. Even PDL's /person/enrich endpoint... - Source: dev.to / 6 months ago
A few things worth flagging: PDL beats Clearbit's historical rates for US and Western European companies, but drops to ~52% match rate for Japan and South Korea specifically. Apollo underperforms on raw company matching but returns... - Source: dev.to / 6 months ago
One thing comparison guides consistently get wrong: Clay is not an enrichment API. It's a waterfall orchestration tool that calls People Data Labs, Apollo, Clearbit, and others in sequence for you. It's useful, but it adds 2–8 seconds of... - Source: dev.to / 6 months ago
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