Best company founding year data API
Exa has the highest measured founding-year correct-field yield: 97.6%, with 203/208 eligible company founding years correct.
Eight enrichment APIs received the same company-domain inputs. Their founding years were normalized and judged against human-reviewed Ground Truth where a reference year was available. The table separates correct yield, coverage, and accuracy when returned.
Founding-year correctness, completeness, and writeback risk.
Correct-field yield is the primary ranking because it penalizes both missing and incorrect years. Coverage measures whether a founding year was returned; accuracy when returned measures how often that year was correct.
| Provider | Correct-field yield | Field coverage | Accuracy when returned |
|---|---|---|---|
| Exa | 97.6%203/208 correct | 98.6%205/208 returned | 99.0% |
| People Data Labs | 93.8%195/208 correct | 94.7%197/208 returned | 99.0% |
| Apollo | 91.8%191/208 correct | 94.2%196/208 returned | 97.5% |
| CompanyEnrich | 90.4%188/208 correct | 93.3%194/208 returned | 96.9% |
| PredictLeads | 89.9%187/208 correct | 90.4%188/208 returned | 99.5% |
| Parallel | 76.4%159/208 correct | 90.4%188/208 returned | 84.6% |
| ZoomInfo | 61.4%129/210 correct | 83.3%175/210 returned | 73.7% |
| Explorium | 0.0%0/208 correct | 0.0%0/208 returned | — |
Compare founding-year 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.
| Provider | HQ location | Industry | Employee band | Founded year | LinkedIn URL |
|---|---|---|---|---|---|
| Apollo | 87.3%240/275 | 95.4%269/282 | 78.2%219/280 | 91.8%191/208 | 90.8%256/282 |
| CompanyEnrich | 50.9%140/275 | 74.8%211/282 | 47.5%133/280 | 90.4%188/208 | 91.1%257/282 |
| Exa | 82.9%228/275 | 96.1%271/282 | 33.2%93/280 | 97.6%203/208 | 5.3%15/282 |
| Explorium | 73.5%202/275 | 84.8%239/282 | 88.9%249/280 | 0.0%0/208 | 86.5%244/282 |
| Parallel | 90.9%250/275 | 92.9%262/282 | 80.7%226/280 | 76.4%159/208 | 86.2%243/282 |
| People Data Labs | 90.2%248/275 | 94.0%265/282 | 86.4%242/280 | 93.8%195/208 | 84.0%237/282 |
| Predict Leads | 68.4%188/275 | 88.3%249/282 | 78.2%219/280 | 89.9%187/208 | 84.8%239/282 |
| ZoomInfo | 73.1%201/275 | 74.5%210/282 | 47.9%134/280 | 61.4%129/210 | 62.4%176/282 |
Which API has the most accurate company founding year data?
Exa has the highest measured end-to-end founding-year yield at 97.6% (203/208 eligible founding years correct). Compare coverage and accuracy when returned separately if missing and incorrect values have different costs.
What does this founding-year benchmark measure?
It measures whether a provider returns the reviewed founding year for a company-domain input. Companies without a reviewed founding-year reference are excluded from this field's denominator.
How do I enrich a list of companies with their founding year?
Send the same normalized primary domain to each candidate provider, map the response into a four-digit founded-year field, and measure missing and incorrect values separately against reviewed references.