Rattler
Rattler: Open-source Conda tooling for developers embedding package workflows in apps. Ranked #39 of 92 in Package Managers by our editors (5.4/10); pricing: Free plan; best for conda tooling embedded in apps and services.
At a glance
- Editor score5.4 / 10
- PricingFree plan
- Best forConda tooling embedded in apps and services
- Free planYes
- Paid fromFree
- Lockfile supportYes
- Facts checked21 Sep 2026
Where it wins
- Handles .conda and .tar.bz2 archives, metadata, solving, and environments
- Supports lockfiles, authentication, mirroring, and local channel indexing
- Offers Python plus JavaScript/WebAssembly bindings for integrations
Where it doesn't
- Primarily a Rust library ecosystem, not a standalone end-user package manager
- Focused on Conda workflows rather than broader package-management formats
- Offline operation is not a stated strength of the product
Our verdict on Rattler
Rattler is an open-source Rust library ecosystem for working with Conda packages without depending on Python. It is intended for developers building package managers, environment managers, and other Conda-compatible software. Its components cover archive download, extraction, and creation; repository metadata access; dependency solving; environment creation; package installation; shell activation; command execution; networking; indexing; and lockfiles. An example binary and language bindings extend its use beyond Rust applications.
For embedded tooling, Rattler offers broad coverage across the Conda workflow. It can work with .conda and .tar.bz2 packages, access package indexes, create and parse lockfiles, authenticate for private registries, mirror network content, and index local Conda channels. The integration surface includes Python bindings and JavaScript/WebAssembly bindings for browser and Node.js applications. It also connects with pixi, rattler-build, the prefix.dev backend, Python, JavaScript, WebAssembly, and conda-forge. Developers choosing Rattler get package-management building blocks rather than a single end-user interface.
The main trade-off is its product shape. Rattler is primarily a Rust library and collection of crates, so teams looking for a ready-made desktop or command-line package manager should choose a more directly user-facing option. Its Conda focus also makes it a targeted fit rather than a general package-management solution. Pick Rattler when your application or service needs Conda-compatible archive handling, solving, environments, authentication, mirroring, or lockfiles, especially across Rust, Python, browser, or Node.js contexts. Do not pick it if your priority is standalone end-user package management outside the Conda ecosystem.
Your product? Our editors can test Rattler in depth and publish a review, labelled as paid · from $149/mo →
Rattler pricing
Rattler fact sheet
| Free plan | Yes |
|---|---|
| Paid from | Free |
| Package formats | .conda, .tar.bz2 |
| Supported platforms | Windows, macOS, Linux, browser, Node.js |
| Dependency resolution | Yes |
| Lockfile support | Yes |
| Workspace support | Not verified |
| Private registry auth | Yes |
| Offline installation | Not verified |
| Deployment | Self-hosted |
| Platforms | Web, Windows, macOS, Linux |
| Support | Community, Docs |
| Built for | Solo, Small business, Mid-market, Enterprise (editorial estimate) |
| Integrations | 7 integrations: pixi, rattler-build, prefix.dev backend, Python, JavaScript, WebAssembly … |
| Pricing | Free plan |
| Website | github.com |
| Facts checked | 21 Sep 2026 |
Rattler integrations
Rattler lists 7 integrations on its own site.
- pixi
- rattler-build
- prefix.dev backend
- Python
- JavaScript
- WebAssembly
- conda-forge
Alternatives to Rattler
- npmA complete JavaScript package workflow with public access free and private packages at $7/month.9.4
- uvA broad, open-source toolkit for managing modern Python projects across three platforms.9.2
- YarnA capable JavaScript package manager for consistent installs and monorepositories.9.0
See all Rattler alternatives →
Used Rattler? Be the first to review it
The editor score above is our own research. What this page doesn't have yet is a reader's view — what you used Rattler for, what worked and what didn't. No stars are seeded and no review is paid for; an editor reads every one before it appears.
Write a reviewTwo minutes · verified accounts only · read by an editor before it appears
Featured on iTechGuides
Rattler is listed in our Package Managers directory. Add the badge to your site — it links back to this page.
<a href="https://www.itechguides.com/products/rattler/"><img src="https://www.itechguides.com/best/badge/rattler.svg" alt="Featured on iTechGuides" width="230" height="46"></a>
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.
Last updated · How we research and update