Plainpaper

Plainpaper is a canvas for marketing campaigns, shared between a marketer and their AI agent. An infinite board, with cards you drag, group and comment on, phases you can lay a campaign out across. The difference is who fills it in. Plainpaper is AI-agent first. Connect Claude, ChatGPT, Cursor or any MCP-compatible client.

The agent arrives briefed for higher quality output without being the typical AI slop. It carries the full campaign process so the agent knows what a finished journey looks like before it starts one. Above that sits a guidelines library holding your brand.

Work lands as typed cards on a shared canvas rather than scrolling past in a chat window. You watch the campaign assemble, edit cards, and leave comments the agent picks up next session.

The reason it holds up on a real campaign is memory. Because the campaign state lives on the board and not in a chat transcript, the agent can open a clean context session and reconstruct the whole thing in a single call.