Mermaid Chart

Mermaid Chart is a Diagramming & Docs collaborative diagram-as-code platform for engineering, product, architecture, DevOps, and documentation teams that need browser-based Mermaid generation, editing, sharing, and version history while keeping diagrams close to code, Markdown, technical specs, and internal knowledge bases, with pricing that starts at a free plan.

Mermaid Chart builds on Mermaid, the open-source JavaScript and TypeScript diagramming project released in 2014, and turns that text-first workflow into a hosted product with workspaces, collaboration, AI-assisted generation, sharing, version history, and exports. The core advantage is that diagrams are expressed as Mermaid syntax rather than locked inside a proprietary canvas file. That makes architecture diagrams, sequence diagrams, flowcharts, ER diagrams, Gantt charts, class diagrams, and state diagrams easier to review in pull requests, preserve in documentation, and regenerate when a system changes. Mermaid itself has broad ecosystem support, including native rendering or common support paths in developer and documentation tools such as GitHub, GitLab, Azure DevOps, Gitea, Notion, Obsidian, Joplin, Tuleap, and Quarto.

The product is especially useful when teams need diagrams that can be created quickly from written requirements or code-adjacent descriptions. A developer can ask the AI assistant to draft a sequence diagram for an API flow, edit the generated Mermaid code, share it with a product manager, and keep the final diagram embedded in docs without exporting a stale PNG. A platform team can maintain C4-style architecture maps or service dependency charts in a format that remains readable after years of repository history. Compared to the 870+ AI tools in our directory, Mermaid Chart is more specialized than general whiteboarding tools: it is less about free-form brainstorming and more about durable technical diagrams that can be versioned, embedded, and maintained.

Mermaid Chart is not a full replacement for Lucidchart, Miro, FigJam, or Microsoft Visio when a team needs polished free-form visual design, workshop boards, broad shape libraries, or presentation-grade canvas control. It is strongest when the important artifact is the diagram source itself: a readable text definition that can be copied, reviewed, embedded, and kept current. Pricing is now represented as Free, Pro at $10 per user/month or $8 per user/month annually, Team at $20 per user/month or $15 per user/month annually, and Enterprise with custom pricing.