Free Prefect alternatives: 5 apps ranked by verified data

Facts checked Nov 8, 2026AppBreakup editorialHow we rank

5 of the 6 Prefect alternatives we track can be used for free (free, open source, or with a free plan). Apache Airflow, Dagster 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	Dagster	Open source	$10/month plus credits	Yes	Web, Linux, macOS +2	5 of 5	64.8
3	Argo Workflows	Open source	—	Yes	Self-hosted	4 of 4	59.4
4	Flyte	Open source	—	Yes	Self-hosted	4 of 4	57.5
5	Windmill	Open source	—	Yes	Web, Self-hosted	4 of 4	52.6

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 Prefect
The industry standard with the largest integration catalogue and many managed hosting options.
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 Prefect 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. Dagster
Best for: Data platform teams who want lineage, data quality and orchestration in one tool
Open sourceSelf-hostableWeb, Linux, macOS, Windows, Self-hosted
64.8
score / 100
Why switch from Prefect
Models pipelines around data assets, with lineage and data quality checks built in.
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 ×0.387
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 Dagster a good Prefect 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)
3. Argo Workflows
Best for: Platform teams already on Kubernetes who want container-native batch and ML pipelines.
Open sourceSelf-hostableSelf-hosted
59.4
score / 100
Why switch from Prefect
Free Kubernetes-native engine where each step is a container, suited to platform teams already on k8s.
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 ×0.369
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 Prefect 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. Flyte
Best for: ML and data teams on Kubernetes who want typed, reproducible Python pipelines.
Open sourceSelf-hostableSelf-hosted
57.5
score / 100
Why switch from Prefect
Also Python-first, but with typed tasks, caching and Kubernetes scaling aimed at ML and AI pipelines.
Pros
Free and Apache 2.0 licensed
Typed task inputs and outputs catch errors early
Caching and retries resume from the failed step
Managed option through Union.ai
Cons
Needs a Kubernetes cluster for production use
Flyte 2 changes the SDK, so Flyte 1 code needs migrating
Smaller community than Airflow
Visit Flyte Details and reviews
How this score is calculated
Editorial fit ×0.363
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 Flyte a good Prefect alternative?
Verified facts
4 of 4 verified
License
Apache-2.0
Checked Nov 5, 2026github.com(opens source in a new tab)
Governance
Linux Foundation AI & Data
Checked Nov 8, 2026flyte.org(opens source in a new tab)
SDK languages
Python, TypeScript, Rust, Go
Checked Nov 8, 2026flyte.org(opens source in a new tab)
Managed version
Union.ai
Checked Nov 8, 2026flyte.org(opens source in a new tab)
5. Windmill
Best for: Engineering teams that want scripts, workflows and internal UIs in one self-hosted platform
Open sourceSelf-hostableWeb, Self-hosted
52.6
score / 100
Why switch from Prefect
Open-source and self-hostable; runs Python and TypeScript scripts as scheduled flows with a built-in UI.
Pros
Scripts, workflows and apps in one place
Supports many languages including Python and TypeScript
Free self-hosted edition with unlimited executions
Cons
Built for developers, not business users
App builder is less polished than Retool's
Enterprise features need a paid licence
Visit Windmill Details and reviews
How this score is calculated
Editorial fit ×0.346
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 Windmill a good Prefect alternative?
Verified facts
4 of 4 verified
Community edition
Free, unlimited executions
Checked Nov 8, 2026windmill.dev(opens source in a new tab)
Script languages
Python, TypeScript, Go, PHP, Bash, SQL
Checked Nov 8, 2026windmill.dev(opens source in a new tab)
Free guests
100 per 30 days
Checked Nov 8, 2026windmill.dev(opens source in a new tab)
Self-hosting
Yes
Checked Nov 8, 2026windmill.dev(opens source in a new tab)

Quick comparison

1. Apache AirflowTop pick

Pros

Cons

Verified facts

2. Dagster

Pros

Cons

Verified facts

3. Argo Workflows

Pros

Cons

Verified facts

4. Flyte

Pros

Cons

Verified facts

5. Windmill

Pros

Cons

Verified facts