Best alternatives to Marktwin in 2026

Picture a shared whiteboard and notebook that lives inside the same folder as your team's actual project files, instead of a separate app you have to remember to update. That is the idea behind Marktwin: rather than asking you to move your notes into a new silo like Notion or a wiki, it opens the Markdown files already sitting in your GitHub repository and turns them into a live, collaborative space -- you and your teammates can write, draw on a canvas, discuss ideas, and decide on next steps together, then send the results back to the same repository where your code and docs already live. Technically, Marktwin connects to a GitHub repo and syncs changes as checkpoints, so file history stays tied to Git rather than a proprietary database -- the maker states 'we never see your content,' implying the workspace works more like a peer-to-peer editing layer than a server that stores your files. The current free tier includes Text (Markdown), Canvas, and Drawing formats, live real-time collaboration with unlimited guests during its early-access period, and a 'Decisions' feature with basic templates for tracking group choices. There is deliberately no built-in AI yet; the maker frames this as keeping context 'in files you control.' A paid Pro tier is planned (pricing not yet announced) that would add an AI teammate, comments and search, automation, and native macOS/iOS/Android/Windows apps, alongside a custom-priced Enterprise tier with SSO, GitLab support, and self-hosted deployment. As of August 2026 the product is in early access and the entire current feature set is free.