9 C99.nl alternatives in 2026
Other providers sell domain WHOIS APIs like C99.nl's. Robtex costs $0.00 per 1,000 domains, GuGuData $0.00057 and WhoisJSON $0.014.
Domain WHOIS API alternatives
On our C99.nl plan pages, we compare each C99.nl plan with other providers' plans. We list other providers' plans below, cheapest per 1,000 domains first.
| Provider and plan | $ per 1,000 domains |
|---|---|
| Robtex, free | $0.00 |
| GuGuData, CNY 49 monthly | $0.00057 |
| WhoisJSON, $120 monthly | $0.014 |
| Enterno, ₽3,990 monthly | $0.016 |
| Sugra API, $588 yearly, Pro (billed annually), GET /api/v1/network/domain/{host}/whois | $0.032 |
| FullHunt, contact us, OEM Enterprise, POST /oem/whois/lookup | not published |
| StartupRadar, contact us, Basic | not published |
| Surepass, contact us | not published |
| WhoisGate, contact us | not published |
Compare every domain WHOIS API plan: Domain WHOIS API pricing: free and cheapest plans compared