Cairn vs Storyflow

Cairn is a macOS desktop app for mapping screens, data, roles, and CRUD operations before building a product. Users sketch low-fidelity pages, modals, and sheets, then connect them into scenarios with triggers and dependencies across roles. Cairn checks whether data used on a screen was created earlier in its causal flow and flags missing data. Its Fields and Journeys views show where data appears and how each role moves through a flow. The app works offline and saves projects as portable.cairn files on the user's Mac. The maker says Cairn has no accounts or telemetry and does not upload project files; it connects to the internet for update checks and Pro license validation. Cairn is positioned as a complement to Figma for later visual design. The free plan costs nothing and includes one project and up to two scenarios, but does not allow file import or export. Real-time collaboration is not available, and Cairn is not intended for pixel-perfect or high-fidelity design.

Storyflow is a browser-based, low-fidelity wireframing tool for planning sitemaps, user flows and layout blocks on an infinite canvas. Users can describe a site or app and have AI arrange pages, screen flows and rough layout blocks. Screenshots, PDFs, reference links and video stills from YouTube or Vimeo can be added as references. AI can use the active board plus up to three Tactics, five documents and three boards as context. Storyflow includes templates, real-time collaboration, view-only sharing and exports in PNG, SVG or PDF. Approved structures can be taken into Figma. It is intentionally limited to ideation and low-fidelity wireframes: there are no component or UI libraries and no clickable prototypes. The browser product requires no installation. Storyflow says projects are private by default, data is encrypted in transit and at rest, and customer content is not used to train AI models. Plans include Free at free, Plus at $9.99 a month, Pro at $19 a month and Max at $49 a month.