Open source Astronomer (Astro) alternatives: 4 apps ranked by verified data

Facts checked Nov 8, 2026AppBreakup editorialHow we rank

4 of the 6 Astronomer (Astro) alternatives we track are open source. Apache Airflow, Prefect and Argo Workflows rank highest, with facts last verified Nov 8, 2026.

Quick comparison

#	App	Pricing	Verified price	Open source	Platforms	Verified facts	Score
1	Apache Airflow	Open source	—	Yes	Linux, Self-hosted, Web	5 of 5	68.8
2	Prefect	Open source	$100/month	Yes	Web, Linux, macOS +2	5 of 5	64.8
3	Argo Workflows	Open source	—	Yes	Self-hosted	4 of 4	61.8
4	Dagster	Open source	$10/month plus credits	Yes	Web, Linux, macOS +2	5 of 5	61.8

1. Apache AirflowTop pick
Best for: Data engineering teams that want a proven, free orchestrator with a huge integration ecosystem
Open sourceSelf-hostableLinux, Self-hosted, Web
68.8
score / 100
Why switch from Astronomer (Astro)
The free open-source project Astro runs, if you're willing to host and upgrade it yourself.
Pros
Free and open source with a very large community
Pipelines are plain Python, so they can be generated dynamically
Hundreds of ready-made operators for clouds and data tools
Managed versions available from several cloud providers
Cons
Running scheduler, workers and metadata database yourself takes real ops effort
Local development and testing are clunkier than in newer tools like Prefect or Dagster
No official hosted service from the Apache project itself
Visit Apache Airflow Details and reviews
How this score is calculated
Editorial fit ×0.3100
Reviews ×0.363
Clicks (90 days) ×0.150
Freshness ×0.15100
Votes ×0.150
0 counted reviews, 0 up and 0 down votes. Full formula
Is Apache Airflow a good Astronomer (Astro) alternative?
Verified facts
5 of 5 verified
License
Apache-2.0
Checked Nov 1, 2026github.com(opens source in a new tab)
Pipeline language
Python
Checked Nov 8, 2026airflow.apache.org(opens source in a new tab)
Web UI
Yes
Checked Nov 8, 2026airflow.apache.org(opens source in a new tab)
Cloud integrations
GCP, AWS, Azure and more
Checked Nov 8, 2026airflow.apache.org(opens source in a new tab)
Maintainer
Apache Software Foundation
Checked Nov 8, 2026airflow.apache.org(opens source in a new tab)
2. Prefect
Best for: Python teams who want orchestration without rewriting code into a separate DAG framework
Open sourceSelf-hostableWeb, Linux, macOS, Windows, Self-hosted
64.8
score / 100
Why switch from Astronomer (Astro)
Pythonic workflows without DAG boilerplate, with a free cloud tier and an open-source server.
Pros
Plain Python with a decorator, little new to learn
Free hosted Hobby tier and a self-hostable open source server
Runs on your own compute, Kubernetes or serverless
Cons
Free cloud tier is limited to 2 users and 5 deployments
Smaller integration ecosystem than Airflow
Paid plans jump quickly from a flat fee to per-user pricing
Visit Prefect Details and reviews
How this score is calculated
Editorial fit ×0.387
Reviews ×0.363
Clicks (90 days) ×0.150
Freshness ×0.15100
Votes ×0.150
0 counted reviews, 0 up and 0 down votes. Full formula
Is Prefect a good Astronomer (Astro) alternative?
Verified facts
5 of 5 verified
License
Apache-2.0
Checked Nov 2, 2026github.com(opens source in a new tab)
Free plan
Hobby, free forever
Checked Nov 8, 2026prefect.io(opens source in a new tab)
Free plan limits
2 users, 5 deployments
Checked Nov 8, 2026prefect.io(opens source in a new tab)
Starter plan
$100/month
Checked Nov 8, 2026prefect.io(opens source in a new tab)
Team plan
$100 per user/month
Checked Nov 8, 2026prefect.io(opens source in a new tab)
3. Argo Workflows
Best for: Platform teams already on Kubernetes who want container-native batch and ML pipelines.
Open sourceSelf-hostableSelf-hosted
61.8
score / 100
Why switch from Astronomer (Astro)
Open-source and Kubernetes-native: each step runs as a container, so it suits teams who already run their own clusters instead of Airflow.
Pros
Free, Apache 2.0 licensed CNCF project
Any language works, since each step is a container
Handles large parallel jobs on Kubernetes
Python users can define workflows with Hera
Cons
Requires a Kubernetes cluster
YAML definitions get verbose for data engineers used to Python
No hosted version from the project itself
Visit Argo Workflows Details and reviews
How this score is calculated
Editorial fit ×0.377
Reviews ×0.363
Clicks (90 days) ×0.150
Freshness ×0.15100
Votes ×0.150
0 counted reviews, 0 up and 0 down votes. Full formula
Is Argo Workflows a good Astronomer (Astro) alternative?
Verified facts
4 of 4 verified
License
Apache-2.0
Checked Nov 3, 2026github.com(opens source in a new tab)
Runs on
Kubernetes
Checked Nov 8, 2026argoproj.github.io(opens source in a new tab)
Workflow model
DAG or step-based
Checked Nov 8, 2026argoproj.github.io(opens source in a new tab)
Implementation
Kubernetes CRD
Checked Nov 8, 2026argoproj.github.io(opens source in a new tab)
4. Dagster
Best for: Data platform teams who want lineage, data quality and orchestration in one tool
Open sourceSelf-hostableWeb, Linux, macOS, Windows, Self-hosted
61.8
score / 100
Why switch from Astronomer (Astro)
Asset-based orchestration with strong lineage and testing, available open source or as a managed cloud.
Pros
Asset-based model makes lineage and freshness visible
Strong local development and testing workflow
Close dbt integration
Hybrid deployment keeps data in your own cloud
Cons
Asset-centric model takes time to learn if you think in tasks
Managed plans add usage-based credits on top of the monthly fee
No free hosted tier beyond the trial
Visit Dagster Details and reviews
How this score is calculated
Editorial fit ×0.377
Reviews ×0.363
Clicks (90 days) ×0.150
Freshness ×0.15100
Votes ×0.150
0 counted reviews, 0 up and 0 down votes. Full formula
Is Dagster a good Astronomer (Astro) alternative?
Verified facts
5 of 5 verified
License
Apache-2.0
Checked Nov 8, 2026github.com(opens source in a new tab)
Solo plan
$10/month plus credits
Checked Nov 8, 2026dagster.io(opens source in a new tab)
Starter plan
$100/month plus credits
Checked Nov 8, 2026dagster.io(opens source in a new tab)
Free trial
30 days
Checked Nov 8, 2026dagster.io(opens source in a new tab)
Self-hosting
Yes
Checked Nov 8, 2026dagster.io(opens source in a new tab)

Quick comparison

1. Apache AirflowTop pick

Pros

Cons

Verified facts

2. Prefect

Pros

Cons

Verified facts

3. Argo Workflows

Pros

Cons

Verified facts

4. Dagster

Pros

Cons

Verified facts