ATAC vs Posting
A side-by-side comparison of two self-hosted developer tools & git options — licensing, setup difficulty, resource needs, and what each one replaces.
| Feature | ATAC | Posting |
|---|---|---|
| Deploy effort | Read-the-docs project | Read-the-docs project |
| Health score | 88 · Excellent | 76 · Good |
| Category | Developer Tools & Git | Developer Tools & Git |
| License | MIT | Apache-2.0 |
| Language | Rust | Python |
| Setup difficulty | Easy | Easy |
| Min. RAM | 64 MB | 128 MB |
| Deployment | binary, source | binary, source |
| GitHub stars | ★ 3,728 | ★ 12,440 |
| First released | 2024 | 2024 |
| Replaces | Postman, Insomnia | Postman, Insomnia |
What are ATAC and Posting?
ATAC
ATAC is an open-source terminal user interface API client that lets developers test HTTP APIs without leaving the console. Collections are stored as plain files so they can be version controlled and self-managed.
- Terminal UI client
- Postman import support
- Git-friendly collections
- Offline operation
Posting
Posting is an open-source terminal-based HTTP client for building and sending API requests. It stores collections as YAML files for easy version control and integrates with command-line workflows.
- Terminal HTTP client
- YAML collections
- Keyboard driven
- Scriptable requests
ATAC vs Posting: key differences
ATAC is written in Rust, while Posting is built with Python. Licensing differs — MIT for ATAC versus Apache-2.0 for Posting. ATAC is the lighter option, starting around 64 MB of RAM against 128 MB for Posting. Posting has the considerably larger community, at 12,440 GitHub stars versus 3,728.
Why pick each one
Choose ATAC if…
- Released under the MIT license
- Easy to set up — beginner-friendly
- Active community (3.7k GitHub stars)
- Written in Rust
Choose Posting if…
- Released under the Apache-2.0 license
- Easy to set up — beginner-friendly
- Mature project with 12.4k GitHub stars
- Written in Python
Frequently asked questions
Is ATAC or Posting better?
Neither is universally better. Posting has the larger community; both share a easy setup difficulty, so the decision comes down to features and licensing.
Are ATAC and Posting free and open-source?
Yes. ATAC is licensed under MIT and Posting under Apache-2.0. Both can be self-hosted at no software cost.
Can I run ATAC and Posting with Docker?
ATAC: check the project docs for container support. Posting: check the project docs for container support.
Which is lighter on resources, ATAC or Posting?
ATAC has the smaller minimum footprint at 64 MB of RAM, compared to about 128 MB for Posting. Real-world usage depends on library size, user count, and enabled features.