Developer tools
Whois JSON API alternatives
1 open-source project that already does this job. Free to use - not free to run, which is what the numbers on the right are for.
The projects
What you give up either way
- Their described "sophisticated tiered caching system to ensure sub-millisecond response times"
- Operational scale and SLA-grade reliability/priority support for higher tiers
- Multi-million domain indexing and any proprietary smoothing/normalization optimizations claimed ("99.9%" accuracy)
- Turnkey hosted quota management and credit-based billing
An open-source project doing the core job proves a replacement is possible. It does not prove it matches Whois JSON API, and it does not prove anyone has run it for a month. How we decide.