I Built a Free Clearbit Alternative: Company Enrichment API Using Only Public Data

In April 2025, Clearbit killed their free tier and moved everything into
HubSpot Breeze Intelligence - starting at $75/month with credits that
expire monthly. For developers who just needed a quick domain → company
info lookup, this was frustrating.

So I built an alternative.

What it returns (example: stripe.com)

{
"domain": "stripe.com",
"name": "Stripe, Inc",
"industry": "Fintech",
"tech_stack": ["React", "AWS", "Cloudflare"],
"email_provider": "Google Workspace",
"country": "US",
"founded_year": 2011,
"social": { "twitter": "stripe", "linkedin": "stripe" },
"confidence": 0.95
}

How it works — 5 public sources, no proprietary database

1. WHOIS - registration date → founding year, country
2. DNS/MX records — email provider (Google Workspace, Microsoft 365, custom)
3. SSL certificate — organization name
4. HTML parsing — description, logo, social links
5. Tech fingerprinting — 35+ patterns: React, Shopify, Stripe, Cloudflare, etc.

Pricing

• Free: 500 calls/month (no credit card)
• Starter: $9/month (2K calls)
• Growth: $29/month (15K calls)
• Pro: $79/month (75K calls)

Try it: https://enrichdata.duckdns.org

Happy to answer questions about the implementation!