# 9 C99.nl alternatives in 2026

Last updated: November 7, 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.

- [Robtex, free](https://datacircle.dev/domain-whois-apis/robtex/free): $0.00 per 1,000 domains
- [GuGuData, CNY 49 monthly](https://datacircle.dev/domain-whois-apis/gugudata/cny-49-monthly): $0.00057 per 1,000 domains
- [WhoisJSON, $120 monthly](https://datacircle.dev/domain-whois-apis/whoisjson/free#120-monthly): $0.014 per 1,000 domains
- [Enterno, ₽3,990 monthly](https://datacircle.dev/domain-whois-apis/enterno/free-scout#3990-monthly): $0.016 per 1,000 domains
- [Sugra API, $588 yearly, Pro (billed annually), GET /api/v1/network/domain/{host}/whois](https://datacircle.dev/domain-whois-apis/sugra-api/free-get-api-v1-network-domain-host-whois#588-yearly-pro-billed-annually-get-api-v1-network-domain-host-whois): $0.032 per 1,000 domains
- [FullHunt, contact us, OEM Enterprise, POST /oem/whois/lookup](https://datacircle.dev/domain-whois-apis/fullhunt/free#contact-us-oem-enterprise-post-oem-whois-lookup): no price per 1,000 domains
- [StartupRadar, contact us, Basic](https://datacircle.dev/domain-whois-apis/startupradar/contact-us-basic): no price per 1,000 domains
- [Surepass, contact us](https://datacircle.dev/domain-whois-apis/surepass/contact-us): no price per 1,000 domains
- [WhoisGate, contact us](https://datacircle.dev/domain-whois-apis/whoisgate/contact-us): no price per 1,000 domains

Compare every domain WHOIS API plan: [Domain WHOIS API pricing: free and cheapest plans compared](https://datacircle.dev/domain-whois-api-pricing)