After ten months of building, ConGro AI is publicly available at https://congro.ai. It is officially live. The first natural-language assistant purpose-built for structural engineers — starting with CSI ETABS, with the rest of the industry to follow.
A note on architecture
The original prototype, eight months ago, was an MCP server. It worked, but it was the wrong shape for the actual problem. Real engineering workflows do not look like a sequence of independent tool calls — they are deeply contextual, multi-step, and require the system to reason about whole structural systems rather than individual elements.
ConGro AI is built on a custom framework designed around how engineers actually think and work. MCP was a useful research path; the production architecture is its own thing.
What is inside today
- 500+ ETABS API functions wired into the chat — the largest natural-language surface area for any structural analysis package today
- Built-in code compliance checks against ASCE 7, ACI 318, AISC 360, and international equivalents
- Self-optimization — the AI iterates on the model when checks fail, rather than handing the engineer a problem to debug
- A Rule Engine that draws on twenty-plus years of code books to produce verifiable, citation-backed output
- Live ETABS session integration — the AI drives your already-open ETABS window via the CSI OAPI
One caveat we are upfront about
Treat ConGro AI’s output as a draft. A licensed engineer’s judgment and final review still hold. The system is designed to compress the mechanical 80% of structural work; the engineering 20% — judgment, code interpretation, project-specific risk — is the engineer’s domain. We are explicit about this on the website, in the terms of service, and in the chat itself.
What is next
Autodesk Revit is the next target, followed by CSiBridge, STAAD.Pro, and the rest of the ten-platform roadmap on our software page. Pricing is locked in for Early Supporters at $25/mo (Foundation) and $100/mo (Structure), forever, while the subscription stays active.
If you design buildings for a living, I would love your feedback. The fastest way to share thoughts is to subscribe to a plan, use the system on a real project, and tell me what is missing. Computers and Structures, Inc. — thanks for the OAPI surface area that made this possible.