When comparing Chisel vs Launchpad, the Slant community recommends Launchpad for most people. In the question“What are the best hosted version control services?” Launchpad is ranked 11th while Chisel is ranked 13th. The most important reason people chose Launchpad is:
Launchpad makes it easy to translate free open source projects into virtually any language in the world. Users are allowed to start working on translating any project they want just by having a Launchpad account and a web browser. Most of the time they don't have to even join a team to start working and the editor is web based, so there is no need for any special software.
Specs
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Pros
Pro Free with no limitations
Both public and private repositories cost nothing to host. You can have any number of them as well as any number of collaborators. The platform itself is also free (libre) and open source software.
Pro Fossil support
This means you get a wiki and a bug tracker that you can work with locally offline and both are version-controlled. You are also able to customize, e.g., the look of your project's repository if you want to.
Pro Support for web based translation
Launchpad makes it easy to translate free open source projects into virtually any language in the world. Users are allowed to start working on translating any project they want just by having a Launchpad account and a web browser. Most of the time they don't have to even join a team to start working and the editor is web based, so there is no need for any special software.
Pro Integrated build/deployment system
If you use launchpad, it gives you a build system (on their platform) as well as easier deployment - user merely adds your PPA to their sources.list file. Deployment (on Ubuntu, at least - other debians as well) doesn't get simpler than this.
Pro Great bug tracking features
Launchpad is built to be used for open source projects, as such it needs a powerful bug trackers to allow developers who want to contribute to jump right in. Launchpad displays bug statistics (total number of bugs, number of bugs fixed etc...) as well. Bugs can be searched and displayed from every project hosted on Launchpad or for single projects.
Cons
Con No support for Git, Mercurial or SVN
Git especially is the most popular version control tool out there, followed closely by Mercurial and SVN, and Chisel supports neither of them.
Con The web interface is complicated and hard to use
Other project hosts such as GitHub, BitBucket or GitLab have easy, simplistic UIs that help new and experienced developers alike to browse code right through the browser. LaunchPad on the other hand is very weak at this. Most of the projects have poor (if any) documentation and no way to determine a project's worth easily. The fastest way to do so with LaunchPad would be to download the project and look through the code manually, which is quite tiresome.