Best company lookup API
A company lookup API does one job: domain in, correct company record out. Three numbers decide which one to use — domain match rate (does it find the company), latency (fast enough to run inline), and cost per run — plus the one vendor comparisons skip: whether the returned fields are actually right.
All four are independently benchmarked here: seven self-serve APIs, the same 300 identity-verified companies — deliberately including subsidiaries and recent rebrands, where lookup breaks — every field judged against LinkedIn-backed reference data. Not a vendor's own sample.
highest domain match rateOcean.io100.0%
Seven lookup APIs — match rate, with correctness beside it
A lookup that resolves but returns wrong fields is worse than a miss — so correct field yield sits next to match rate. The full benchmark adds accuracy-when-present, coverage, and cost.
| Provider | Domain match rate | Enrichment success rate | Median latency |
|---|---|---|---|
| Ocean.io | 100.0% | 84.5% | 534 ms |
| PredictLeads | 100.0% | 83.5% | 555 ms |
| Fiber | 99.3% | 91.9% | 602 ms |
| People Data Labs | 98.3% | 86.9% | 274 ms |
| CompanyEnrich | 98.3% | 71.3% | 309 ms |
| Apollo | 97.0% | 84.1% | 656 ms |
| Explorium | 95.0% | 73.3% | 617 ms |
There is no single “best” company enrichment API — the independent benchmark points to a different provider depending on the axis your workflow is constrained by. Every leader below is measured on 300 identity-verified companies:
- CRM data you can trust end to endFiberhighest enrichment success rate · 91.9%
- Few wrong values written — right when returnedFiberhighest field accuracy · 92.9%
- Fill the most fields per companyFiberhighest field coverage · 97.2%
- Find the most companies overallOcean.iohighest company match rate · 100.0%
- Real-time enrichment in product or agent flowsPeople Data Labslowest median latency · 274 ms
- Budget-constrained backfillsOcean.iolowest estimated cost · $1.92 cohort
Full provider comparison, methodology, and per-company evidence: the company enrichment benchmark →
Company lookup APIs — common questions
What is the best company lookup API in 2026?
By the axis that defines lookup — resolving a domain to the right company record — Ocean.io currently has the highest company match rate (100.0% of 300 identity-verified companies resolved); People Data Labs is fastest (274 ms median latency); Ocean.io is cheapest at public self-serve rates ($1.92 for the run). Match rate alone isn't enough — a lookup that resolves but returns wrong fields is worse than a miss, so enrichment success rate is shown beside it (Fiber, 91.9%).
What is a company lookup API?
An endpoint that takes a company identifier — usually a domain, sometimes a name — and returns a structured record: legal name, HQ, industry, size, LinkedIn identity, and similar firmographic fields. It's the building block under enrichment, routing, and dedupe flows. The measurable axes are whether it finds the company (match rate), whether the returned fields are right (accuracy), how fast it answers (latency), and what it costs per resolved record.
How is this different from vendor lookup-API comparisons?
Vendor comparisons test on samples the vendor chose and typically rank the author first. This one is independently benchmarked and evaluated: every API received the same 300 identity-verified company domains — deliberately including subsidiaries and recent rebrands, where lookup breaks — responses were normalized to one field contract, and every field was judged against LinkedIn-backed reference data. No vendor pays for inclusion or rank; inputs, outputs, and judgments are public.
Which company lookup API is fastest?
People Data Labs, at 274 ms median latency on this run. Latency matters when lookup runs inline — in a signup flow, a routing decision, or an agent loop — and matters much less for batch backfills.