ProtoNote

An agent can now produce a working prototype in minutes, which moves the bottleneck downstream: getting it in front of people and turning what they say back into changes. ProtoNote is built for that specific loop.

Drop it in, share one link

Upload an HTML prototype, a Markdown file, an image or a PDF and get a shareable link. Multiple files become pages of one project, each with its own note thread, organised into folders on a persistent dashboard. The link renders a real preview in Slack, carries your name and a note on what you want looked at, so a reviewer knows what they are opening before they click.

Reviewing without an account

Reviewers do not sign up. They enter a name and start leaving notes, and those notes pin to the exact spot on the page and to the exact version — not a comment thread beside the work, and not feedback on a version nobody can identify any more. Notes appear live as the team reviews, with email notification as they land.

Closing the loop with Claude

ProtoNote ships an MCP connector for Claude. Inside a chat you can turn what you have just built into a ProtoNote, and when feedback arrives, ask Claude to pull the open notes and apply the changes; the new version publishes itself. That removes the usual manual step of copying comments out of one tool and back into the prompt.

Pricing

Free covers 3 active prototypes with unlimited reviewers, unlimited notes and email notifications. Pro is $10/month (with an annual option) for unlimited prototypes plus folders, version history and viewer tracking. Reviewing is always free, so nobody you share with hits a paywall.

Built solo and launched on Product Hunt in August 2026.