# How Flint uses Kernel

**167x**: “167x faster cold starts”

As published on [kernel.sh](https://www.kernel.sh/customers/flint), March 2026. Captured by usedby on 2026-10-25.

- Company: [Flint](https://www.usedby.ai/companies/flint.md)
- Tool: [Kernel](https://www.usedby.ai/tools/kernel.md)

## The use case: how Flint deploys Kernel

Flint runs an autonomous website platform whose agent uses Kernel's hosted browsers to visit a customer's site and clone their brand, and to run real-time web research such as visiting competitor sites, taking screenshots and running QA loops. It replaced its self-hosted Chromium and Playwright setup with Kernel.

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

> after switching to kernel's browsers, cold starts dropped from 5 seconds to about 30 ms. this enabled an entirely new use case: flint customers could now run real-time, open-ended web research—visiting competitor sites, taking screenshots for inspiration, and running qa loops.

- **5x**: “5x fewer bot detection errors”
- **30 ms**: “after switching to kernel's browsers, cold starts dropped from 5 seconds to about 30 ms.”

> when it comes to infra, i'll take reliability over great developer experience. kernel has both.
>
> sam sheridan, founding engineer

Source: [kernel.sh](https://www.kernel.sh/customers/flint), captured 2026-10-25.

## Other companies using Kernel

- [Felicity](https://www.usedby.ai/companies/felicity.md) — Confirmed
- [Rye](https://www.usedby.ai/companies/rye.md) — Confirmed
- [Stably](https://www.usedby.ai/companies/stably.md) — Confirmed
- [The Prompting Company](https://www.usedby.ai/companies/the-prompting-company.md) — Confirmed
- [Cash App](https://www.usedby.ai/companies/cash-app.md) — Observed
- [Claim Health](https://www.usedby.ai/companies/claim-health.md) — Observed

## What usedby checked

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

- Checked: the figure 167x is printed word for word on the page, near the name of Flint.
- Checked: the passage quoted above is copied word for word from the page, near the name of Flint.
- Checked: the publication date is read from the page’s own metadata, never guessed.
- Checked: Flint uses Kernel. Confirmed line. Latest check across sources: 2026-10-25.
- Not checked: the result itself. We quote it; we did not measure it.

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