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Interview 16 of 213:19 PM · Moscone West

Sandra Sertel

Founder, Tzun

A receipt for every AI decision.

The full conversation

5:02 · every question and answer, tightened. Tap a line to jump to it.

The short version

2:06 · Sandra's answers, condensed.

Clips

5 short clips, captioned, in vertical and widescreen. Free to download and repost.

A receipt for every AI decision

“So Tzun is a receipt for every AI decision. It holds people and AI accountable. Well, it means that we track the model lineage, what the AI decided, and then if and when a human approved it.”

0:16
Download 1080p: 9:16 6 MB · 16:9 6 MB

AI can't check AI

“Because AI can't check AI, right? So we have hard-coded technology to check the AI. And honestly, I think it's because of AI that I was able to do it. Otherwise, I'd be like reading a textbook bored out of my mind.”

0:18
Download 1080p: 9:16 7 MB · 16:9 7 MB

1.1 billion applicants rejected

“It was actually inspired by a real life case. So it's a Mobley versus Workday case, where their AI powered software discriminated against so many applicants. It rejected 1 .1 billion applicants in a very short amount of …”

0:28
Download 1080p: 9:16 13 MB · 16:9 12 MB

Laid off. Then she built.

“I wish it was that I quit my job. I actually got laid off like a bunch of people here in the Silicon Valley And so I was devastated, of course, but took some time off. And then I realized, I don't want to go back into co…”

0:34
Download 1080p: 9:16 15 MB · 16:9 15 MB

What do people come to you for?

“But one of the questions that somebody asked me when I was trying to ideate was, what do people come to you for? And at first, I didn't know. And then I realized, wait, people come to me to help them with a resume, like …”

0:37
Download 1080p: 9:16 17 MB · 16:9 16 MB

At the booth

Team photos from the expo floor.

Tzun team at TechCrunch Disrupt 2026Tzun team at TechCrunch Disrupt 2026