---
title: "Self-Driving CI for GitHub Actions Case Studies | StarSling"
description: "Real GitHub Actions case studies: how Better Auth, Mastra, and Partcl made CI faster and cheaper with StarSling's self-driving runners."
url: https://starsling.dev/customers
canonicalUrl: https://starsling.dev/customers
---

# Teams that have upgraded to self-driving CI.

StarSling is a self-driving CI platform. Fast GitHub Actions runners with AI agents that continuously optimize your builds.

The teams running it: Abhi Aiyer (Co-founder & CTO, Mastra) - Bereket Engida (Founder & CEO, Better Auth) - Vamshi Balanaga (Co-founder & CTO, Partcl)

## [Mastra](https://starsling.dev/customers/mastra)

Combined store Tests (vector+storage) - p95 wall, all branches

> "At Mastra we move so fast that the bottleneck becomes reviews and CI. Time spent compounds, and StarSling helps you realize how much time you're losing."
>
> Abhi Aiyer / Co-founder & CTO, Mastra

**6x faster** (29m 56s -> 5m 06s).

## [Better Auth](https://starsling.dev/customers/better-auth)

E2E - p50 job, all branches

> "We've been using StarSling for Better Auth CI. It's been saving us countless hours, both with fast runners and their agent optimizing our CI."
>
> Bereket Engida / Founder & CEO, Better Auth

**2x faster** (2m 22s -> 1m 04s).

## [Partcl](https://starsling.dev/customers/partcl)

Compute cost - per CI run

> "Within a day of migrating to StarSling Runners, their agents opened up a PR that literally made our Rust CI tests 2x faster!"
>
> Vamshi Balanaga / Co-founder & CTO, Partcl

**13x cheaper** (self-hosted -> StarSling).