Free construction AI

Free construction AI for heavy civil

openmud is open-source construction AI you can use now — no signup wall for mud1 in the free beta. Built for estimators, PMs, and field teams who need answers and finished work products, not generic chatbot fluff.

What you get

• mud1 — construction AI chat with RAG over heavy civil knowledge (OSHA, pipe, bidding, companies).
• Workflows from chat — slash commands for estimate, proposal, schedule, Bid2Win/HCSS export, and work finding.
• Free tools alongside AI — calculators, browser takeoff, wiki, and field resources.
• Open source — code on GitHub.

Who it is for

Underground utility and heavy civil contractors: unit-price bidding, trench/pipe work, change orders, bluestakes/811 context, and bid-day exports into systems like Bid2Win and HCSS.

Is construction AI free here?

Yes for the current free beta — use hosted mud1 while it lasts. Chats help train mud1 on real field questions. When you need premium models, bring your own key; that does not burn the free hosted budget.

Start in under a minute

1. Open mud1.
2. Ask a job question (trench safety, markup, pipe bedding) or run /estimate / /proposal.
3. With a project open, use /bid2win or /csv to export real files.