How accurate is B2B contact data? (2026)
About 1 in 4 job titles were wrong, out of date or missing in both Apollo and Seamless.AI, while most emails were right. The big gap was people who had changed jobs: Apollo had caught 33 of 49, Seamless 1, based on 145 people I checked by hand in November 2026.
Example record, made up
Jordan Example
- Title
Director of SalesNow VP of Sales Out of date- Company
Example CoNow at NewCo Moved- jordan@example.co Right
Head to head
The same 145 people, looked up the same way in each tool. Rows within 2 people are called even.
On people in their current job the two tools were even. The split was freshness: looked up at their old company, Seamless.AI still had 34 of 49 recent job changers there, and moves more than 4 months old fared no better.
Test your own data in 20 minutes
Pick 20 people you can check. Ten from customers' team pages, ten who announced a new job in the last six months.
Look each one up in your tool by name and company, the way your reps do.
Count three things: titles that are wrong or missing, emails that differ from the one the company publishes, and job changers still shown at the old company.
If more than 1 in 4 titles miss, have reps confirm the title before they personalize. If job changers still sit at the old company, re-check any record older than 90 days before a sequence starts.
All the numbers 145 people
| Measure | Apollo | Seamless.AI |
|---|---|---|
| People on company team pages | 96 | 96 |
| Found | 95 | 94 |
| Job title right or close | 71 (75%) | 69 (73%) |
| Job title wrong or out of date | 14 | 10 |
| Job title missing | 10 | 15 |
| Had a work email | 90 | 93 |
| Matched the email the company publishes | 17 of 21 | 18 of 21 |
| People who changed jobs, May to October 2026 | 49 | 49 |
| Shown at the new job | 33 (67%) | 1 (2%) |
| Still shown at the old job, or another | 15 | 34 |
| Not found | 1 | 14 |
How this was measured
The answer key. 96 people from 39 US B2B companies' own team pages, and 49 people whose new job was announced in a press release between May and October 2026. Every name, title and email was confirmed on its source page before any lookup. Four team-page people and one job changer were dropped because their page could not be re-checked.
The lookups. Each person was looked up once in each tool on November 11, 2026, by name and company: Apollo's standard people match with no third-party data added, and Seamless.AI's contact research. Job changers were looked up at their old company in both tools. A title counts as right when it names the same role, even if worded differently; each judgment was made by a person reading the row. Records with no title and no email count as not found. Seamless.AI returned a phone number for 91 of 145 people; phones were not checked.
Disclosure. Outblox is an Apollo Certified Partner. Neither company knew about, paid for or reviewed this test. Only totals are published; no individual's details appear here, and the example record above is invented.
Free to quote and reuse, with a link to this page. Suggested citation: Outblox contact data test, November 2026, outblox.com/b2b-contact-data-accuracy. The totals are in the CSV.