Buildbox

An agent can pass an eval and still leave users stuck. Buildbox finds the breakdowns behind failed journeys and ranks them by business impact. Book a demo.

Website heybuildbox.com LinkedIn linkedin.com

Recent activity Aug 3, 2026 Milestone

Buildbox: Agent analytics for real user outcomes

Find the user-facing agent failures hidden behind successful traces and evals.

On Y Combinator →

Milestones

Aug 3, 2026 Milestone

YC Summer 20268 upvotes

Buildbox: Agent analytics for real user outcomes

Find the user-facing agent failures hidden behind successful traces and evals.

Y Combinator →Company profile →

Founded Summer 2026