# 13 FernTool alternatives in 2026

Last updated: November 11, 2026.

The best FernTool alternatives for domain WHOIS APIs: thenetworkery, FluentEDI and DomainDetails, by our benchmark of November 10, 2026. FernTool's website is ferntool.com.

## Domain WHOIS API alternatives

[FernTool](https://datacircle.dev/domain-whois-apis/ferntool/free) is #10 of the 38 providers we rank. Every provider of this API, ranked: [Domain WHOIS API: best providers in 2026](https://datacircle.dev/best-domain-whois-api)

1. [thenetworkery, free](https://datacircle.dev/domain-whois-apis/thenetworkery/free): Overall score 95.5, Accuracy score 97, $0.00 per 1,000 domains
2. [FluentEDI, free](https://datacircle.dev/domain-whois-apis/fluentedi/free): Overall score 92.5, Accuracy score 86, $0.00 per 1,000 domains
3. [DomainDetails, €9.99 monthly, Alerts](https://datacircle.dev/domain-whois-apis/domaindetails/free-get-api-rdap#9-99-monthly-alerts-get-api-rdap): Overall score 90.6, Accuracy score 99, $0 extra per 1,000. The €9.99 monthly price covers any number of domains.
4. [DC5 WHOIS, free, Public instance](https://datacircle.dev/domain-whois-apis/dc5-whois/free-public-instance-get-api-v1-domain): Overall score 90.3, Accuracy score 97, $0.00 per 1,000 domains
5. [WhoisJSON, $120 monthly](https://datacircle.dev/domain-whois-apis/whoisjson/free#120-monthly): Overall score 89.1, Accuracy score 99, $0.014 per 1,000 domains
6. [Enterno, free, Open API](https://datacircle.dev/domain-whois-apis/enterno/free-scout#free-open-api): Overall score 88.1, Accuracy score 89, $0.00 per 1,000 domains
8. [StableDomains, free](https://datacircle.dev/domain-whois-apis/stabledomains/free): Overall score 83.3, Accuracy score 87, $0.00 per 1,000 domains
9. [Robtex, free](https://datacircle.dev/domain-whois-apis/robtex/free): Overall score 83.2, Accuracy score 71, $0.00 per 1,000 domains
11. [Agent Toolbox, free](https://datacircle.dev/domain-whois-apis/agent-toolbox/free): Overall score 81.2, Accuracy score 81, $0.00 per 1,000 domains
12. [Pyxmark, free](https://datacircle.dev/domain-whois-apis/pyxmark/free): Overall score 75.1, Accuracy score 58, $0.00 per 1,000 domains

## IP company lookup API alternatives

[IPKit](https://datacircle.dev/ip-company-lookup-apis/ipkit/free), [thenetworkery](https://datacircle.dev/ip-company-lookup-apis/thenetworkery/free) and [DC5 WHOIS](https://datacircle.dev/ip-company-lookup-apis/dc5-whois/free-public-instance-get-api-v1-lookup) are the best [IP company lookup API providers](https://datacircle.dev/best-ip-company-lookup-api) in the Datacircle benchmark.

On our [FernTool plan pages](https://datacircle.dev/ip-company-lookup-apis/ferntool/free), we compare each FernTool plan with other providers' plans. We list other providers' plans below, cheapest per 1,000 IP addresses first.

- [DC5 WHOIS, free, Public instance, GET /api/v1/ip](https://datacircle.dev/ip-company-lookup-apis/dc5-whois/free-public-instance-get-api-v1-ip): $0.00 per 1,000 IP addresses
- [DNSlytics, free](https://datacircle.dev/ip-company-lookup-apis/dnslytics/free): $0.00 per 1,000 IP addresses
- [IPKit, free](https://datacircle.dev/ip-company-lookup-apis/ipkit/free): $0.00 per 1,000 IP addresses
- [MxToolbox, free, GET /api/v1/Lookup/asn/](https://datacircle.dev/ip-company-lookup-apis/mxtoolbox/free-get-api-v1-lookup-asn): $0.00 per 1,000 IP addresses
- [thenetworkery, free](https://datacircle.dev/ip-company-lookup-apis/thenetworkery/free): $0.00 per 1,000 IP addresses

Compare every IP company lookup API plan: [IP company lookup API pricing: free and cheapest plans compared](https://datacircle.dev/ip-company-lookup-api-pricing)

## See also

- [thenetworkery alternatives](https://datacircle.dev/thenetworkery-alternatives)
- [FluentEDI alternatives](https://datacircle.dev/fluentedi-alternatives)
- [DomainDetails alternatives](https://datacircle.dev/domaindetails-alternatives)
- [DC5 WHOIS alternatives](https://datacircle.dev/dc5-whois-alternatives)
- [WhoisJSON alternatives](https://datacircle.dev/whoisjson-alternatives)
- [Enterno alternatives](https://datacircle.dev/enterno-alternatives)
- [StableDomains alternatives](https://datacircle.dev/stabledomains-alternatives)
- [Robtex alternatives](https://datacircle.dev/robtex-alternatives)