Dessn

Dessn is a design canvas that runs your actual production codebase. Rather than working from a static mockup file, you connect an approved repository and Dessn pulls your real product pages onto a canvas where you can view every page and state, explore ideas, prototype, review, and QA with your team. It is built for product teams with an existing codebase — designers, PMs, and engineers — who want to explore and collaborate on product ideas directly in production code without opening an IDE. The stated purpose is simple: see what's live, and fix what's drifting. Dessn describes itself as sitting at the intersection of design and dev tools, with a canvas purposely built for design workflows while remaining anchored in production. The problem Dessn addresses is one that appears when product teams ship fast with AI: it becomes hard to keep track of what is actually live and hard to keep the product consistent. Design artifacts drift away from what is really shipped, and there is no shared source of truth for humans and agents to work from. Dessn's answer is to run your codebase on a design canvas that is always in sync with prod, so your team and your AI agents work from one shared source of truth. One customer quote on the site captures the reasoning directly: production code is the source of truth for design. Another frames the appeal for designers as being able to explore ideas in the context of your production codebase. The first capability group is visibility into what's live. Dessn shows every page as it exists in production, lets you visualize entire user flows, and stays always in sync with prod. On the site this is illustrated with a fictional banking app called Orbit, where pages such as /cards, /cards/freeze, /cards/replace, /cards?frozen, and /cards/replace/done are laid out as states of a single flow. A second example walks through a meeting-booking flow from an event type to a confirmed booking, on prod data. Seeing flows as they actually exist lets a team review the real product surface — including edge states like a frozen card or a completed replacement order — instead of guessing from a stale file. The second capability group is consistency. Dessn lets you audit your entire product in one prompt, automate your design system, and iterate with perfect fidelity to prod. The site shows an audit thread titled "Tables drift across 4 pages," which reports that 12 tables were audited in a product called Fern and that two patterns were found with four differences — header capitalization versus sentence case, amount right versus left aligned, row height of 40px versus 56px, and status shown as a badge versus plain text. This illustrates how the audit surfaces concrete, comparable inconsistencies across pages so the team can decide what to standardize. Combined with a design system that stays in sync and full fidelity to production, the team iterates on the real components rather than a simulation of them. The third capability group is a design-first environment for collaboration. Dessn offers direct editing, sharing and collaboration, and what it calls the best design agent. Teams can comment, branch, and iterate together, and share prototypes for reviews, user tests, or sales demos. A comments example on the site shows a thread on a finance app screen where a teammate asks whether to show which account pays each bill. Dessn also ships an MCP that lets it work inside the AI you already use: you can view your canvases and prototypes plus the code behind them, create new flowcharts, prototypes, or comments, and approve Dessn's work from your terminal, switching to Dessn when you want to polish by hand. The MCP install page shows logos for coding agents including Claude Code, Cursor, Codex, and Grok, and the site offers a one-line prompt to paste into a coding agent to set up Dessn for a project. How it works is described in three steps. First, you connect your repo in one click — the site's example is Connect GitHub. Second, Dessn compiles your codebase, a step the site describes as taking 30 minutes while it sets up your design environment. Third, you pull your product pages onto a canvas to design, review, and QA with your team. In the FAQ, Dessn adds that there is no lengthy implementation: connect an approved repository and your first page is usually ready in minutes, because Dessn learns the existing routes, components, and design system automatically. It also states that you can design and prototype in your own codebase without coding required, and that it requests read-only repository access, never accesses backends, databases, or customer records, and never writes, modifies, or pushes code back to your repository. The benefits that follow from the content are straightforward. Teams get visibility into what is actually live instead of an approximation of it. They get a shortcut to consistency, because auditing and design-system work happen against production rather than a separate source. They get design work with perfect fidelity to the real design system, which means what they explore is what ships. Collaboration improves because the canvas is shareable and commentable, and prototypes can be reused for reviews, user tests, and sales demos without rebuilding them. And because agents can operate through Dessn's MCP, human and AI work converge on the same canvases and prototypes rather than diverging. Concrete use cases described on the site include auditing a product to find inconsistencies, mapping user flows with states and personas, commenting, branching, and iterating together, and sharing prototypes for reviews, user tests, or sales demos. The illustrated examples — a card-freeze and card-replacement flow, a booking flow from event type to confirmation, a cross-page table audit, and a commented finance dashboard — show what that looks like in practice across multi-state flows and shared design review. Teams that need to QA pages against production, or want a demo environment built from real product screens, are described as working in this same canvas. Dessn is explicitly for product teams with an existing codebase: designers, PMs, and engineers. It supports React, Vue.js, Electron, and React Native apps, and you connect your codebase through GitHub or GitLab. Access can be restricted to specific repositories or projects, and for monorepos Dessn can be configured to work from the relevant project or subdirectory, with access revocable at any time. Dessn states that it does not train on your data and uses LLM providers that guarantee no training and zero data retention, and that it is fully SOC 2 Type II compliant. No credit card is required to get started. Named customers and users shown on the site include Mercury, Vidsy, Wispr, Greenlight, Color, Noyo, ngrok, Lette, Great Question, Operate, Pencil, Ethena, Planned, Raylu, Seapoint, Groom Club, Red Rover, Dataflo, Comfy, Flowglad, Ascend, and Startale, alongside testimonials from designers and product leaders describing the product as a way to work inside production code. In short, Dessn's value proposition is that design, review, and QA happen on the code that actually ships. By turning your production codebase into a collaborative design canvas that stays in sync with prod, it gives teams and their AI agents one shared source of truth — so they can see what's live, fix what's drifting, and move from idea to merge-ready product work in the same place.