2,416Book a call

Open-source construction software, ready for real projects.

Seven solutions we build in the open and use in every client project, from CAD/BIM data extraction to a full ERP. Use them free on your own, or let us set them up, extend them and support your team.

2,416 GitHub stars35 published reviews31 repositories · 643 forks
  1. PlatformOpenConstructionERP
  2. AI & automationSkills for AI Agents · n8n workflows
  3. Cost dataOpenConstructionEstimate · CWICR
  4. CAD/BIM datacad2data converters · Excel add-in
  5. KnowledgeThe book · workshops · guides

I want to…

Flagship · ERP platform 978 · 312 forks

OpenConstructionERP

A modular, self-hosted ERP for construction companies, “like WordPress for construction”.

  • BOQ editor, PDF/CAD/BIM takeoff and AI cost matching
  • Tendering, 4D/5D scheduling, finance and earned value
  • 30+ regional standards incl. DIN 276, NRM, MasterFormat, GAEB
  • Any LLM provider; AI prepares changes, a person approves
190+
modules
120,000+
priced items
44
languages

AGPL-3.0 · commercial licence on request

Try OpenConstructionERP Implementation & custom modules
Flagship · CAD/BIM data 518 · 107 forks

cad2data converters

Revit, IFC and AutoCAD files to open tables, offline, no Autodesk licence.

  • RVT 2015–2026, IFC 2x3–4.3, DWG 1983–2026
  • XLSX database, DAE geometry, schedules, PDF sheets
  • UI, command line, Python or n8n, on Windows and Linux
  • 10 ready-made n8n workflows under MIT
128,000+
files a year
3
CAD/BIM formats
0
licences needed

Community free for personal & research use · commercial licence for production

Download free Commercial licence
Excel · Revit round-trip

DDC Excel add-in

Open RVT, IFC and DWG data directly in Excel, and write edited parameters back to Revit.

  • Extract model data to Excel without the authoring tool
  • Excel → Revit: update parameters from a spreadsheet
  • 64-bit and Office 32-bit builds
RVT
IFC · DWG
2-way
Excel ⇄ Revit

Free download

Download the add-in How it works
AI agents 352 · 88 forks

Skills for AI Agents

238 construction skills that teach Claude Code, Cursor or Copilot real construction work.

  • BIM analysis, QTO, cost estimation, scheduling
  • Document control, data quality and reporting
  • Runs on your machine with your own model access
238
skills
3+
agent IDEs

Open source

Get the skills AI agents for construction
Cost data 251 · 62 forks

OpenConstructionEstimate · CWICR

An open, multilingual construction cost database built for AI agents and semantic search.

  • Photo, text or BIM model → cost estimate
  • Vector search with Qdrant
  • Feeds the LLM cost-estimation workflows
55,700+
work items
27,600+
resources
30
regions

Open source

Explore the database Cost estimation help
Automation

n8n workflow hub

Ready-made pipelines for validation, QTO reports, LLM cost estimation, RAG classification and site management bots.

  • Batch conversion with validation and reporting
  • Classification with AI & RAG, CO₂ estimation
  • Project management bot with photo reports (Telegram)
10+
templates
MIT
licence

Free templates

Browse workflows Workflow automation
Knowledge

Data-Driven Construction: the book

The methodology behind everything above, from clay tablets to machine learning, with practical examples.

  • 10 parts, free to read online
  • 32 languages, paperback on Amazon
  • Basis of our workshops and trainings
23,000+
downloads
123
countries

Free online · paperback

Read free Paperback on Amazon

Free tools, expert help

The software is free. Getting it to work for you is our job.

Most teams start with a free download and come back when they need it integrated, extended or rolled out to fifty people. That is where our team comes in, with a proposal scoped to your company and payment after the result.

Consulting

Which tools, in which order, for your processes.

Services & details

Custom solutions

We build and integrate pipelines, agents and ERP modules.

Services & details

Workshops

Your team learns the stack on your own files.

Services & details

Support & licences

Monthly support and commercial licences.

Services & details

Step-by-step guides

Solution recipes you can run today.

Practical walk-throughs with the free tools: conversion, quantity takeoff, validation, estimating, ChatGPT and Python. More in the articles and pipeline examples.

Open source

Built in the open, trusted by thousands.

We publish what we build. Engineers, estimators and developers worldwide use, fork and extend our repositories, so you can audit every line before you trust it with your data, and you are never locked in.

github.com/datadrivenconstruction

github.com/datadrivenconstruction

2,416

stars across all our repositories

31
public repositories
643
forks by other teams
978
stars on OpenConstructionERP

+ 25 more repositories

QuantityTakeoff Python ★ 34CO2 calculating the embodied carbon ★ 26VisualBIM ★ 22Checking the quality of Revit and IFC projects ★ 17ML Price Prediction Model ★ 17DDC Converters OLD VERSIONS ★ 16ImportExcelToRevit ★ 13Revit IFC Creating images ★ 13Examples of files after conversion ★ 10data analytics ★ 8QuantityTakeoff JupyterNotebook ★ 8Quick QTO ★ 7Revit Data Analysis Streamlit App ★ 64D 5D Pipeline ★ 5ChatGPT with Revit IFC ★ 5Open Estimation ★ 5Revit IFC Verification ★ 5Fire simulation in RVT and IFC projects ★ 3Geometric Groups by Any Property ★ 3RevitIFC Projects ★ 2AEC manager helper ★ 1etl collecting data from revit and ifc projects for analysis an ★ 1Excel to Revit ★ 1PDF to Excel ★ 1Visualizing Data from Excel ★ 1

Let’s talk

Let’s make your data work for you.

Tell us what slows your team down. You get an honest answer on what can be automated, how long it takes and how we would scope it. You pay only after the result.

  1. 01
    30-minute intro callYour data, your tools, the result you need. No sales script.
  2. 02
    Proof on your filesThen a written proposal with scope and timeline, agreed before any work starts.
  3. 03
    Pay after the resultYou pay when the agreed result is delivered.
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Greater Karlsruhe area, Germany · on-site in DACH, remote worldwide · EN / DE

Tell us about your project

Free intro call · NDA on request · no obligation

What do you need?

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