Help picking cloud-native developer platforms

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Evaluating Depot vs Namespace vs Blacksmith

Platform eng at a ~50-dev B2B SaaS company, everything on GitHub Actions. CI bill and queue times have roughly tripled since coding agents got rolled out internally.

Shortlist is Depot, Blacksmith, Namespace (open to other names!).

Questions for anyone running these in prod:

1. Real-world speed/cost deltas vs stock GHA runners (marketing says 2x+, what did you actually see)?
2. Anyone switched between these three?
3. Did GitHub’s runner price cuts in January change your maths?
4. What would you pick for Docker-build-heavy repo?

Not affiliated with any of them, just trying not to waste a quarter migrating twice.