About

The validation category sells certainty. We sell verification.

Every vendor in this market claims "99% accuracy." None of them publish how they measured it, none of them number their claims, and most will return a confident verdict on a check they never ran. Buyers can't tell the difference from the outside — which is exactly why the claims all look the same.

Boundstone is built on the opposite bet: that the first vendor to make its accuracy checkable — pre-registered benchmarks, frozen methodologies, responses that list what wasn't checked — wins the customers who've been burned by the adjectives. A boundstone is a survey marker: a stone you can trust because someone measured before setting it. That's the product, and it's also the name.

It's built by one founder, in public, on boring reliable infrastructure. The benchmark series is numbered before results exist, the methodology freezes before any vendor is queried, and the blog documents the decisions — including the ones that turn out wrong.

TT

Thomas Tsui

Founder — writes the guides, freezes the methodology, answers the email.

Operating principles

  • — Every API response lists the checks it didn't perform, not just the ones it did.
  • — Accuracy claims live in numbered benchmarks with public checksums, nowhere else.
  • — Billing promises are Terms clauses, not marketing copy: credits never expire, cancel self-serve, 30-day refund.
  • — Zeros stay honest — no astroturfed counts, no fake testimonials, ever.

Contact

The API is live — start free and you're talking to the product directly. hello@boundstone.io reaches the founder — we validate email for a living, so we tested our own inbox end-to-end before printing it here. The waitlist gets benchmark № 001 the day it publishes, straight from the founder.