Welcome to the home of Loko Scheme, an optimizing Scheme compiler!



Loko is available from git:

git clone

For automated work, please use the mirror on GitLab.

loko-0.10.0.tar.gz (sig) - 2021-09-21

All releases

Loko Scheme is also available from these package repositories:

A bootable hard drive image is available. Give it some RAM and a supported machine, and it gives you a REPL.


Loko Scheme is licensed under the GNU Affero General Public License, version 3 or later.

AGPLv3 logotype

Commercial support and professional services can be negotiated.


The Loko Scheme Developer's Manual [PDF].

Hype-free zone

Loko Scheme is a niche compiler. It is not trying to replace any other compiler. Some ideas for what you can do with it:

Loko Scheme comes with some limited hardware support:

The drivers are used in the bootable disk image.


Please report issues to Loko Scheme on GitLab. You can also sign up to get notified of new releases.

Please bring any questions you may have to comp.lang.scheme, #loko on or the GitLab issue tracker.

Göran Weinholt