Buildbox (YC S26) — Agent analytics for real user outcomes
Buildbox helps product teams improve the human-agent experience. We analyze user intent, agent behavior, and outcomes to find where users get stuck or lose trust, then turn those findings into ranked, reproducible issues.
Buildbox is a Y Combinator company in the Summer 2026 batch. Its directory entry describes it as: Agent analytics for real user outcomes. The founders listed are Trishala Jain (Founder/CEO), Mark Nour (Founder/CTO) (Y Combinator directory entry, July 28, 2026).
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What it does Agent analytics for real user outcomes (source)
Example from a real report (our sample on Target): “Target eliminated approximately 1,800 corporate positions, with around 1,000 employees receiving layoff notices and the remainder accounted for by eliminating open roles.” Source: NBC News
Buildbox helps product teams improve the human-agent experience. We analyze user intent, agent behavior, and outcomes to find where users get stuck or lose trust, then turn those findings into ranked, reproducible issues.
What the site is built with
Next.jsframeworkVercelhosting
Read from the page's own HTML and response headers on 10 September 2026, at https://heybuildbox.com/. Each badge matched a string the site serves about itself — hover one to see which. Nothing here is a traffic, ranking or revenue figure: those cannot be read off a page and are not claimed.
Checked away from the directory entry. Neither line below comes from the company's Y Combinator page.
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.
The title and description the site itself served, answering 200. Not a cached copy and not the company's directory entry — what was live when we asked.
Counted only where a thread links to this company's own site, announces it by name on that forum, or names it beside its own Y Combinator batch. A thread whose title merely carries the words is not counted — a name is not an identifier. Hacker News is not us, and nothing above is our opinion of the company.
Trishala Jain
Founder/CEO
Co-Founder of Buildbox. Prev Google Labs, MongoDB, AppDynamics. UC Berkeley M.E.T. (EECS + Business).
Mark Nour
Founder/CTO
Co-Founder of Buildbox. Prev Netflix, Google Cloud, Berkeley CS
Founders, titles and bios as the company published them. Photographs are our own copies of the ones on that record, so they do not break when the original link expires.
One of 126 companies held here in B2B › Analytics.
No investor is drawn from a Form D — the form states how many invested and never who. The one investor on this graph is named because a batch has exactly one.
Want the whole picture on Buildbox?
Example from a real report (our sample on Target): “Target eliminated approximately 1,800 corporate positions, with around 1,000 employees receiving layoff notices and the remainder accounted for by eliminating open roles.” Source: NBC News
A Full Report on Buildbox: verified, sourced, every claim cited, ready in a few minutes. See pricing.
What the Full Report on Buildbox covers
The Short Answer
Which Company This Is
What They Do, And How The Money Works
Who Runs It, And How To Reach Them
The Money: Funding, Valuation, Runway
Who Pays Them, And Who They Are Up Against
Warning Bells
Sources
10 cited sources found
Plus the sections for what you are deciding, which you pick after ordering.
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Is this you?
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