# How Bubble uses Braintrust

**1.5x** More accurate Agent after evals

As published on [braintrust.dev](https://www.braintrust.dev/customers/bubble). Captured by usedby on 2026-10-25.

- Company: [Bubble](https://www.usedby.ai/companies/bubble.md)
- Tool: [Braintrust](https://www.usedby.ai/tools/braintrust.md)
- Industry: [DevTools & Infrastructure](https://www.usedby.ai/companies/industry/devtools-infrastructure.md)
- Teams: AI team, Product team

## The use case: how Bubble deploys Braintrust

Bubble's AI team uses Braintrust to run evals on its app-building Agent, scoring quality, latency and cost against datasets and comparing experiments when changing code or swapping models. They also use the Braintrust CLI with coding agents to triage production traces and open fixes and tickets automatically.

Summary written by usedby from the source page, in English. The figures are those of Braintrust and Bubble, not ours.

> Bubble recently launched Agent 2, a completely new version of its core app-building Agent. It's 1.5 times more accurate than its predecessor at visually representing user prompts, while also performing faster and more cost efficiently.

> In the couple of weeks leading up to this launch, we were plugging in new models very regularly. Braintrust has given us the ability to make those decisions with confidence, about which model to move forward with.
>
> Zach Tessler, Senior Engineering Manager

Source: [braintrust.dev](https://www.braintrust.dev/customers/bubble), captured 2026-10-25.

## Other AI tools used by Bubble

- [Claude](https://www.usedby.ai/tools/claude.md) — Confirmed
- [QA Wolf](https://www.usedby.ai/tools/qa-wolf.md) — Confirmed

## Braintrust users in DevTools & Infrastructure

- [Box](https://www.usedby.ai/companies/box.md) — Confirmed
- [Browserbase](https://www.usedby.ai/companies/browserbase.md) — Confirmed
- [Dropbox](https://www.usedby.ai/companies/dropbox.md) — Confirmed
- [Graphite](https://www.usedby.ai/companies/graphite.md) — Confirmed
- [Retool](https://www.usedby.ai/companies/retool.md) — Confirmed
- [Airtable](https://www.usedby.ai/companies/airtable.md) — Observed

## What usedby checked

We compared the story with its live page on 2026-10-25.

- Checked: the figure 1.5x is on the page; its label is our wording.
- Checked: the passage quoted above is copied word for word from the page, near the name of Bubble.
- Checked: Bubble uses Braintrust. Confirmed line. Latest check across sources: 2026-10-25.
- Not checked: the result itself. We quote it; we did not measure it.

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Source: https://www.usedby.ai/case-studies/bubble-braintrust · How we check: https://www.usedby.ai/methodology