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The editor is usable without an account, which allows hands on testing before registration. No time limited trial or paid plan details are stated on the homepage.
Learn moreAutEng Docs
AI documentation workspace with Mermaid, KaTeX, and machine-checked math
Intermediate
What is AutEng Docs?
AutEng Docs is an architecture diagram tool. An AI assisted Markdown workspace for technical writing, bundling Mermaid diagrams, KaTeX math, code blocks, web research and optional CAS or Lean 4 verification of derivations and proofs.
AutEng Docs is a browser based workspace for writing technical documentation, aimed at software engineers, data scientists and mathematicians who need more than a general note taking app. The editor combines GitHub Flavored Markdown, Mermaid diagrams and KaTeX math in one canvas, so architecture diagrams, sequence diagrams, equations and syntax highlighted code blocks all render in place rather than being pasted in as images or screenshots. The homepage positions it explicitly against Confluence, Notion and Google Docs, arguing that those tools either miss native Markdown or cannot render diagrams and math at all. The AI layer works in two directions. You can describe a document in plain language, for example an OAuth 2.0 implementation guide with sequence diagrams or an API spec for a REST service, and the assistant drafts the structure, diagrams and code examples. It can also search the web for current information and ask clarifying questions when a request is underspecified. Once content exists, the editor lets you refine it iteratively and export to a .md file. What separates AutEng from generic AI writing tools is its verification tooling. Proposed mathematical derivations can be checked step by step through a Computer Algebra System (SymPy), with results shown in a verification block, and the platform also supports formal proofs in Lean 4 with Mathlib for cases where heuristic checking is not enough. The site publishes worked examples, including a quadratic formula derivation verified with mode=solve and an induction proof that the sum of the first n odd numbers equals n squared. AutEng fits teams producing ADRs, RFCs, API specs, runbooks and data pipeline documentation, plus academic and research writing where equations must hold. The editor is testable without an account, but saving work and generating public share links requires signing up. Pricing is not published on the homepage, and no integrations or support channels are described there.
How do you use AutEng Docs?
1Open the editor without an account
Go to the homepage and launch the AutEng Editor directly. No sign up is required to test Markdown, Mermaid and math rendering.2Draft a document with an AI prompt
Describe the document you need, such as an architecture overview or a REST API reference, and let the assistant generate structure, diagrams and code examples. Mention the audience and any visuals you want.3Add diagrams and equations inline
Insert Mermaid blocks for flowcharts or sequence diagrams and wrap math in $ or $$ delimiters for KaTeX rendering. Code blocks take a language tag for syntax highlighting.4Verify a derivation with the CAS
For algebraic work, run the verification block to check each transformation with SymPy. Open the worked quadratic formula derivation to see how verified steps are presented.5Try formal proof verification in Lean 4
If you need machine checked certainty, submit a Lean 4 proof using Mathlib tactics and run Verify. The verification docs show an induction example and explain the difference from CAS checks.6Save your work and share it
Create an account to persist documents and generate public share links, or download the file as Markdown for use elsewhere.
Pros and cons
Pros
- Markdown, Mermaid and KaTeX render natively in one editor, which removes the diagram and equation workarounds common in general docs toolsAI
- Math and proof verification via SymPy CAS and Lean 4 with Mathlib is a rare capability in a documentation productAI
- The editor can be tried in the browser without creating an accountAI
- AI generation covers architecture docs, API specs, tutorials and sequence diagrams from a plain language promptAI
- Documents export to .md, so output is portable rather than locked to a proprietary formatAI
Cons
- No pricing information is published on the homepage, so cost has to be confirmed before committing a teamAI
- Saving documents and creating public share links require an account, and collaboration features are not documented on the siteAI
- Verification depends on external solvers, so it is only as strong as the CAS or Lean setup behind itAI
- The site lists no support channels, integrations or version control hooks, which matters for team adoptionAI
- Lean 4 formal proving has a steep learning curve and will be out of reach for most documentation writersAI
How much does AutEng Docs cost?
Features
GitHub Flavored Markdown editing with live rendering, Mermaid diagrams for architecture and sequence flows, KaTeX inline and display math, syntax highlighted code blocks in multiple languages, AI drafting of architecture docs, API specs, tutorials and specs, web research for current information, CAS verification of algebraic steps, Lean 4 with Mathlib for formal proofs, .md export, and public share links after sign up.
Frequently asked questions about AutEng Docs
Does AutEng Docs offer a free trial?
The editor is usable without an account, which allows hands on testing before registration. No time limited trial or paid plan details are stated on the homepage.How do you use AutEng Docs?
The walkthrough on this page covers 6 steps: 1. Open the editor without an account 2. Draft a document with an AI prompt 3. Add diagrams and equations inline 4. Verify a derivation with the CAS 5. Try formal proof verification in Lean 4 6. Save your work and share it.What platforms does AutEng Docs support?
AutEng Docs is available on Web App.What are the limitations of AutEng Docs?
No pricing information is published on the homepage, so cost has to be confirmed before committing a team. Saving documents and creating public share links require an account, and collaboration features are not documented on the site. Verification depends on external solvers, so it is only as strong as the CAS or Lean setup behind it.
Status
StatusActive
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Added10/21/2026
Platforms
Web App
Pricing
FreePaid
