AI diagramming built on the popular open-source Mermaid syntax.
Mermaid Chart's biggest advantage is that it is built on Mermaid.js, the open-source syntax already supported natively in GitHub, GitLab, Notion, and countless docs tools, so your diagrams stay portable and diff-able rather than locked in. The AI features lower the barrier to the syntax. Two honest notes: the syntax-first, developer-oriented approach is not for everyone, and pricing transparency is inconsistent across sources, with the higher tiers described as increasingly sales-led. For individuals and small teams, the free and Pro plans are accessible and fairly priced.
Mermaid Chart is the commercial diagramming platform from the team behind open-source Mermaid.js, adding a visual editor, real-time collaboration, and AI on top of Mermaid text syntax. It lets developers and technical teams create flowcharts, sequence diagrams, ERDs, and Gantt charts from text or AI prompts, keeping diagrams portable and code-adjacent. It offers a free tier plus paid Pro and Enterprise plans, with higher tiers described as increasingly sales-led. It is best for teams already using or comfortable with Mermaid syntax.
Mermaid Chart is the commercial product built around Mermaid.js, the widely used open-source library that renders diagrams from simple text syntax. It offers a visual editor, real-time collaboration, and AI features on top of that syntax, so developers and technical teams can create flowcharts, sequence diagrams, entity-relationship diagrams, Gantt charts, and more by writing text or prompting AI, then keep those diagrams versioned alongside code. Because Mermaid syntax is already embedded in tools like GitHub, GitLab, Notion, and many documentation systems, Mermaid Chart appeals to teams that want their diagrams to be portable, diff-able, and code-adjacent rather than trapped in a proprietary drawing tool. Its AI features let users generate or refine diagrams from natural language, lowering the barrier to the syntax. Mermaid Chart offers a free tier and paid Pro and Enterprise plans; some sources describe the higher tiers as increasingly sales-led, with pricing pages steering larger buyers toward contacting sales. For individuals and small teams, the free and Pro options make it an accessible, developer-friendly diagramming choice, especially for anyone already using Mermaid syntax.
Mermaid Chart is the commercial diagramming platform from the team behind open-source Mermaid.js, adding a visual editor, collaboration, and AI on top of Mermaid text syntax. It lets developers create diagrams from text or prompts and keep them portable and code-adjacent. It offers a free tier plus paid Pro and Enterprise plans, with higher tiers described as increasingly sales-led. Its key advantage is Mermaid's broad native support across GitHub, GitLab, Notion, and docs tools. No specific company funding is publicly disclosed.
Mermaid Chart is the commercial company built around Mermaid.js, the popular open-source diagramming library created by Knut Sveidqvist and maintained by an active open-source community.
The commercial product adds a hosted editor, collaboration, and AI features on top of the open syntax. It targets developers and technical teams who already benefit from Mermaid's wide adoption in code and documentation tools.
Mermaid Chart provides a visual and text editor, real-time collaboration, and AI generation on top of Mermaid syntax, supporting flowcharts, sequence diagrams, ERDs, Gantt charts, and more.
Diagrams remain text-based and portable, integrating natively with GitHub, GitLab, Notion, Confluence, and other tools, plus VS Code. Paid tiers add unlimited diagrams, team collaboration, SSO, and advanced AI.
Developers, technical writers, and engineering teams that value diagrams-as-code, portability, and integration with code and documentation systems.
Developers and technical writers who create and maintain diagrams as code.
Engineering managers and documentation or platform leads standardizing diagramming tooling.
Senior engineers and open-source advocates already using Mermaid syntax.
An engineering or documentation-focused team that wants portable, versionable diagrams-as-code with AI assistance and native integration into GitHub, Notion, and similar tools.
No specific company funding for Mermaid Chart is publicly disclosed. The product is built around the open-source Mermaid.js project and its maintaining team.
Mermaid Chart is the commercial platform built by the team behind the open-source Mermaid.js library. It adds a visual editor, collaboration, and AI on top of the same text syntax.
As of August 2026 it offers a free tier plus paid plans, with reported Pro pricing around $6.67 per user per month billed annually. Some sources note higher tiers are increasingly sales-led, so verify current pricing with the vendor.
It supports flowcharts, sequence diagrams, entity-relationship diagrams, Gantt charts, and more, all defined via Mermaid text syntax or generated with AI.
Mermaid syntax is text-based, so diagrams are versionable and diff-able, and it is natively supported in tools like GitHub, GitLab, and Notion, keeping diagrams portable and close to your code.
Yes. Mermaid AI can generate and refine diagrams from natural-language prompts, lowering the barrier for people less familiar with the underlying syntax.
Side-by-side pages for pricing, features, and best-fit use cases.
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