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 WHOIS - registration date → founding year, country DNS/MX records — email provider (Google Workspace, Microsoft 365, custom) SSL certificate — organization name HTML parsing — description, logo, social links Tech fingerprinting — 35+ patterns: React, Shopify, Stripe, Cloudflare, etc. Pricing Free: 500 calls/month (no credit card) Starter: $9/month (2K c