Is Astronomer (Astro) free? What it actually costs in 2026
Astro has no free plan: a free trial, then usage pricing — a Small deployment on the Developer plan runs at $0.35 an hour ($0.42 on Team), always on, plus workers from $0.13 an hour while tasks run.
Every plan is pay as you go, billed monthly. Deployments (scheduler, webserver, triggerer) bill by the hour whether or not a Dag runs; workers scale to zero and bill only while executing. Business, Enterprise and Private Cloud are quoted. The page gives no length for the trial.
What the free tier actually includes
- No $0 tier; trial only, length not stated on the page
- Deployments bill 24/7 from $0.35 an hour (about $255 a month for the smallest)
- Dedicated clusters from $2.40 an hour on Team and above
Where the wall is
Hour one after the trial. Airflow needs its scheduler running, so the floor is a Small deployment at $0.35 an hour — roughly $255 a month before a single task — which is the number to compare with a self-hosted Airflow on a $20 box.
After that: Developer: deployments from $0.35 an hour; Team: from $0.42 an hour, dedicated clusters from $2.40 an hour; workers from $0.13 an hour; extra ephemeral storage $0.0002 per GiB-hour; Business and Enterprise quoted.
Can you self-host Astronomer (Astro)? Yes
Astro is managed Apache Airflow. Airflow itself, Dagster and Prefect are open source and run on your own infrastructure — the pages compared here.
What it actually takes to run one yourself
Real RAM against the documented minimum, monthly cost, setup time, and the one thing that catches people out.
Self-hosting Apache Airflow
Self-hosting Prefect
Self-hosting Dagster
When paying is still the right call
Stay if you do not have a platform team. Self-hosted Airflow at scale is a real system to operate — executor tuning, database contention, scheduler restarts, upgrade paths — and one bad quarter of that costs more than the subscription. Stay if you need SOC 2 paperwork, an SLA, and someone contractually obliged to answer. And stay if you are deep in Airflow already: Astronomer's maintainers know the internals better than almost anyone, and that is a genuine thing to be buying.
What you are locked into
Unusually low, and this is the honest headline. Your DAGs are ordinary Airflow Python and run on any Airflow. What is Astronomer-specific is the surrounding tooling — the Astro CLI, deployment config, and the observability layer — none of which is where your logic lives. The realistic switching cost is rebuilding the platform underneath, not rewriting the pipelines. Anyone quoting you a large migration number should be asked to show which part is actually the DAGs.
If you would rather not pay: Apache Airflow
Apache Airflow
The same engine Astro runs, self-hosted and free.
Free and open source. You pay for the cluster and the people who run it.
See all 4 Astronomer (Astro) alternatives comparedCompare the free options head-to-head
Read from Astronomer's own pricing and documentation on 2026-09-26 — 31 days ago. Vendors change prices without notice; confirm before you commit.