When comparing NAPT to other metrology proficiency testing (PT) providers, the difference is clear. Unlike providers who offer PTs as a side service, NAPT is backed by a full-time, dedicated staff focused solely on proficiency testing. We offer access to technical guidance from over 50 metrology experts, unmatched expertise, and The best customer portal of any PT provider. Your data isn’t just reviewed in isolation — it’s compared against submissions from over 100 peer organizations, giving you valuable benchmarking and insight. At NAPT, we like to say to new participants: “We dare you to compare NAPT to anyone else. “Once you do, you’ll see — there truly is no comparison.