I've been a CircleCI user for years, and like many of you, I've watched our monthly invoice creep up as our pipeline complexity (and data volume) grew. The recent pricing changes felt like a push to make us commit to higher tiers, which got me looking around.
There's been a lot of buzz about "fresh competitors" like Buildkite, Earthly, and even GitHub Actions scaling up. But when I do a deep dive on the pricing pages, I often hit a wall. It's not as simple as comparing compute-minute rates, is it? You have to factor in:
* The cost of maintaining your own queue/workers (if applicable)
* The "hidden" cost of re-writing complex pipeline configs
* Integration costs with our monitoring and, crucially, our data stack for artifact tracking
From my data pipeline lens, I'm also evaluating how these services handle streaming build logs and events back to our data lake for analytics. That's a non-trivial feature.
So, my question: has anyone done a recent, *real* total-cost-of-ownership comparison at scale? Say, for a mid-sized team burning 50k-100k compute minutes monthly with complex, data-heavy workflows. Is the competition forcing real price competition yet, or are we just trading one set of constraints for another? I'm particularly curious about the cost of parallelization and the caching story—those are the real budget killers for us.
—Claire
Backend lead at a fintech startup, ~70 engineers. We run data-heavy ETL pipelines and ML training workflows in prod, similar scale to you.
* **Real cost at your scale:** At ~80k minutes, CircleCI is basically an enterprise quote, ballpark $8k-$12k/month. Buildkite with your own workers on AWS Spot comes in around $4k-$5k for the agent control plane plus compute. The "hidden" cost is the DevOps time to manage those workers.
* **Integration/Data Stack:** No one beats CircleCI's out-of-the-box observability integrations. Streaming logs/events to your data lake is trivial. Buildkite requires you to pipe logs yourself, which is a real cost if your team isn't infra-heavy.
* **Config Migration Pain:** Moving from `.circleci/config.yml` to another system is a full rewrite, not a conversion. For complex pipelines, budget 2-3 person-weeks of eng time for testing and debugging. GitHub Actions feels simpler but falls apart on complex matrix builds.
* **Where the competition actually wins:** Buildkite wins on pure, variable compute cost at scale and control over your own hardware. Earthly wins on repeatable local testing, which can slash debug time and wasted remote minutes. Neither wins on a unified, polished SaaS experience.
I'd recommend Buildkite if you have a platform/infra team that can own the worker fleet and log plumbing. If you're lean and just want the pipeline to work, stay on CircleCI and negotiate hard. Tell us your team's appetite for managing infrastructure and if you're locked into a specific cloud.
always ask for a multi-year discount
You're dead-on about the hidden DevOps cost, but it's amortizable. The $4k-$5k Buildkite+Spot figure assumes someone's already managing your cloud infra. If you aren't, that's another 0.5 FTE, which at fintech rates obliterates the savings for a year.
Your point on observability integrations is key. The cost of piping logs isn't just engineering time, it's the ongoing data transfer and storage charges. At 80k minutes, streaming every log line to S3/DataDog can add hundreds to the bill that CircleCI bundles in.
A hybrid approach we've used is to keep complex, integrated workflows on CircleCI but shift high-compute, low-observability-need jobs (like ML training) to a separate Buildkite queue. This avoids a full config rewrite but captures the spot instance savings where it counts.
Less spend, more headroom.