Grein is a visual workspace for moodboards, creative references, notes, and project collaboration. Put images, videos, links, notes, and files side by side on one canvas, add context beside each reference so you remember why you saved it, and group things into nested boards.
Collaborators can edit together in real time, leave comments on specific blocks, and share read-only public links. The free plan has unlimited canvas blocks across two projects. The Pro plan ($4.99/month) adds unlimited projects, full version history, and an AI assistant that works from what is on your board.
Grein also provides an MCP server, so compatible assistants such as Claude and ChatGPT can read and edit your boards with your permission.
