Head-to-Head Comparison · Alternative to Astronomer · 🤖 automation
Astronomer vs Dagu
Single-binary workflow orchestrator that runs scheduled DAGs locally or over SSH, with retries, human tasks, a built-in Web UI, and file-based state storage. Here is how Dagu ($0/mo open source) stacks up against Astronomer ($15/mo) across cost, hosting, data privacy, and real-world trade-offs.
Dagu is a verified Open Source-licensed open-source replacement for Astronomer. Switching from Astronomer ($15/mo) saves $180/yr per solo seat, or $900/yr for a 5-person team. Deployment: Runs on Self-host.
The catch: Requires self-hosting setup, updates, and server maintenance compared to managed Astronomer.
Astronomer vs Dagu Specifications
facts verified 2026-11-07
| Dimension | Astronomer (Paid) | Dagu (Replacement) |
|---|---|---|
| Monthly Price | $15 / mo | $0 / mo |
| 1-Year Cost (1 seat) | $180 / yr | $0 / yr (Save $180) |
| 1-Year Cost (5 seats) | $900 / yr | $0 / yr (Save $900) |
| 1-Year Cost (10 seats) | $1,800 / yr | $0 / yr (Save $1,800) |
| Source & License | Proprietary SaaS | open source Open Source |
| Where It Runs | Vendor Cloud | Self-host (your server) |
| Platforms | Web / Cloud | webself-hosteddocker to self-host |
| GitHub Stars | — | ★ 4.5k (active nov 2026) |
Deep Dive: Switching from Astronomer to Dagu
Trade-offs, installation & data architecture
What you trade away
Requires self-hosting setup, updates, and server maintenance compared to managed Astronomer.
How to deploy Dagu
Clone https://github.com/dagucloud/dagu or deploy with Docker Compose
What it takes to run
Deploy via Docker or binary release from GitHub and configure environment variables.
Where your data lives
All application data and configuration live on your own server or local database.
Why fork Dagu instead of vibe-coding a Astronomer clone?
Instead of paying recurring SaaS fees for Astronomer or rebuilding it from scratch, deploy one of the 4 battle-tested open-source alternatives like Kestra.
Astronomer vs Dagu FAQ
Is Dagu a good free alternative to Astronomer?+
Yes. Dagu is a verified open-source (Open Source) replacement for Astronomer. Single-binary workflow orchestrator that runs scheduled DAGs locally or over SSH, with retries, human tasks, a built-in Web UI, and file-based state storage.
What is the catch when switching from Astronomer to Dagu?+
Requires self-hosting setup, updates, and server maintenance compared to managed Astronomer.
How much do you save switching from Astronomer to Dagu?+
Astronomer costs $15/mo ($180/yr) per seat, whereas Dagu is $0/mo. Switching saves $180/yr for a solo user, $900/yr for a 5-person team, and $1,800/yr for a 10-person team.
How do I install or self-host Dagu instead of Astronomer?+
Install: Clone https://github.com/dagucloud/dagu or deploy with Docker Compose. Setup: Deploy via Docker or binary release from GitHub and configure environment variables.
