Best company industry classification API 2026

Industry correctness, completeness, and writeback risk.

Correct-field yield is the primary ranking because it penalizes both missing and incorrect classifications. Coverage answers whether a provider returned an industry. Accuracy when returned answers how often a populated value was correct.

The best industry data provider depends on the failure you can tolerate.

Taxonomy-aware does not mean anything vaguely related passes.

A provider passes when its label is the same industry, a synonym, an appropriate broader category, a narrower specialization, or an adjacent taxonomy label that still describes the company's primary business. Materially different sectors and contradictory specific subsectors fail. A generic manufacturing label does not replace a specialized research category simply because both sound technical.

The judge receives only the reviewed reference value and normalized provider value; it does not browse for new evidence while scoring. See the complete judging and Ground Truth methodology →

Industry labels are measured. NAICS and SIC code assignment is not.

Some enrichment APIs return NAICS or SIC codes, but this benchmark normalizes and scores the provider's primary textual industry or business category. It does not verify whether a six-digit NAICS code, a four-digit SIC code, or a GICS, ICB, or TRBC classification is exact. Those systems differ in hierarchy, update cadence, and classification purpose, so a credible code benchmark needs separate reviewed labels and should not inherit the winner on this page.

Compare industry performance across every scored field.

This is the main benchmark's per-field table for HQ location, industry, employee band, founded year, and LinkedIn URL. Each value is correct-field yield against the eligible reviewed references for that attribute. Read the main benchmark methodology for the frozen cohort and public evidence.