Our team at Dogstudio has been using Ludus for a few years now and it really proved to be a gamechanger for us. We started using Ludus for presentation decks when giving international design talks, allowing us to have the design flexibility we need, the possibility to directly import videos in there, a full control on kerning, importing your own fonts, and now the real-time collaboration.
We know there are a lot of tools out there including the newly released Pitch which gets a ton more visibility, but we're convinced those are for two different publics, and as a design agency we need to have the most control of our presentations VS trying to get it done in a Figma not being suited for online presentations.
Definitely a tool to check and regularly use!