Layerun cuts CI time and cost by only running the work that actually changed. No rewrites. No re-architecture. Just dramatically fewer builds.
87% of CI jobs skipped across 41k runs
Layerun's causal engine resolves only affected paths.
Teams using Layerun typically skip 80–90% of CI work by reusing deterministic results instead of rebuilding unchanged code.
Developers get feedback in seconds instead of minutes.
CI rebuilds everything because it can't tell what changed.
Layerun only runs work that truly depends on a change.
CI reuses previous results when inputs are identical. Dramatically faster pipelines and fewer pointless reruns, without rewriting your builds.
CI is stateless. Debugging is guesswork.
Every execution is a temporal snapshot: inputs, environment, and results captured as addressable state.
Answer "what changed between these runs?" and replay historical behavior without guesswork. Debugging flaky builds becomes comparing snapshots, not digging through logs.
"It works on my machine" memes.
Hermetic, reproducible environments. Same tools, dependencies, and permissions everywhere.
If it passes locally, it passes in CI. No more "works on my machine" when environments drift. Perfect reproducibility.
Layerun only runs work that truly depends on a change. Instead of rebuilding everything, CI reuses previous results when inputs are identical.
Across 41k CI runs, 87.3% of jobs were safely skipped by the causal engine.
Most CI runs waste 80–90% of their compute on untouched code. Layerun eliminates that.
Stop rebuilding the world. When a library stays the same, every downstream rebuild disappears. Your CI becomes incremental, selective, and smart, exactly like your code should be.
Rebuild the entire monorepo on a 2-line change?
Miss cached work because paths don't match?
Give you zero historical state?
Burn CPU credits for no reason?
Layerun doesn't.
Plug in your current CI usage and let Layerun estimate how much of that work is redundant. Most teams discover they're paying for thousands of minutes of builds that don't need to run at all.
Under the hood, Layerun is a Causal & Temporal CI engine: it models what depends on what, and how that state evolves over time, so it can reuse work safely and deterministically.
Layerun monitors capability access during execution.
We build a causal graph of all dependencies.
State is preserved as an immutable epoch.
We reuse results if inputs haven't changed.
"Layerun cut our CI spend by 72% in the first week. Nothing else we tried even came close."Head of Platform, SaaS company (200 engineers)
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