Ethos seems new but it has the basic features that you will need to show your brand.
There templates
Here the list of content I could upload :

- Brand copy guideline (you can add as many section as you need) , also you can use html directly to manage how the text is displayed (this tips has been shared by Briand the owner during our onboarding call)

-Brand asset (you can upload jpg, svg, and videos with links !)
-Brand colors (palette , mono etc)
- Brand fonts (you have to upload a picture of your fonts and you can also upload the fonts directly so that your customers / users can download them)

Everything in one place.

The only negative point is that the platform is slow sometime.

It will be interesting ot have recommandation & information messages to explain to users thz size limit or the size recommanded for each assets !

Good work team !