Define the question before the benchmark
Decide whether you need present hosting context, historical discovery, high coverage on shared platforms, stable batch operation, or a combination. A provider cannot be fairly evaluated against an unstated goal.
Build a representative IP set
Use addresses from your authorized workflow that you partly understand. Include stable dedicated hosting, low-density addresses, recently moved domains, common shared hosting, and one or two dense platforms. Avoid selecting only famous edge cases.
Measure more than result count
- Relevance: are known useful names present?
- Noise: are unexpected names explainable by history or sharing?
- Freshness: how often do sampled names still resolve?
- Historical value: are known earlier relationships retained when useful?
- Normalization: are duplicates and malformed names controlled?
- Reliability: do repeated jobs finish consistently?
- Usability: can dense results be exported and reviewed?
Verify a sample independently
For each benchmark address, select known positives, unexpected positives, and expected-but-missing names. Check current DNS, documented earlier evidence, RDAP context, certificates where appropriate, and infrastructure type. Label each finding instead of forcing every difference into “right” or “wrong.”
Watch for misleading evaluation shortcuts
A giant count can be mostly historical or platform noise. A tiny count can be current but incomplete. A single address can favor one source by chance. Unsupported accuracy percentages hide the benchmark population and definition of truth.
Use a simple purchase decision
- Can the product answer your defined question?
- Are the relevant relationships present often enough?
- Can you explain unexpected results?
- Does the workflow finish reliably at your list size?
- Is the plan allowance adequate for your densest normal addresses?
- Are limitations and payment terms clear?
Use the public preview first and a Proof Pass for a broader test. Buy a longer term only when the evidence supports it.