Every feature is a module: a folder with a manifest, a lazy-loaded page component
and an entry in the registry. Drop one in, reload, and it shows up in the Modules
page ready to toggle on.
Start with 190+ built-in modules, then build or install your own. From
estimating to BIM to the field, with an SDK, hooks and a marketplace so
the platform becomes exactly the software your business runs on.
One source of truth. From first drawing to final account.
The whole chain in one take: a drawing becomes a takeoff, the takeoff becomes a bill, the bill carries its markups and the job is inspected on site. One data model underneath all of it.
the full cycle, one platform
The full project cycle. Measured, priced, forecast, settled.
Measure, price, plan, buy, build and settle in one application. Every screen hands its result to the next on one database, so nothing is retyped and nothing drifts. Open source, free under AGPL-3.0, runs on your own machine or server, and every record exports in open formats.
A bill line opens into the resources it was priced from, each carrying its own class and its own currency. Turkish supply stays in lira, the admixture in euros, under one dollar total.
Bill of Quantities
4D Schedule · 5D Cost
5
A price library, not a price list
Every rate carries a minimum, an average and a maximum, and says how many estimate lines cite it.
Product & Resource Catalog
Bill of Quantities
6
The cost base under the estimate
Browse unit and composite rates by region and catalogue, or keep your own, and pull a rate with the labour, material and equipment behind it straight into the bill.
Budget, committed, actual and forecast on one screen, with earned value read off the same data rather than typed into a separate sheet. It will tell you the performance index you need from here to land on budget.
5D Cost Model
Cost-Value Reconciliation
8
Time built from the same bill
The programme is generated from bill positions and stays linked to them, so a quantity that moves takes the dates with it.
4D Schedule
4D model · Earned value
9
What could still move the number
Each risk priced and rated on the same project, so the contingency you carry is a sum of named exposures rather than a percentage on the bottom line.
Every query carries its discipline, its due date and whose move it is, and an answer that arrives with cost in it turns straight into a variation.
Requests for Information
Variations · Submittals · BIM viewer
11
Acceptance leaves a record
Each inspection carries its checklist, its result and its date, so a failure becomes a task with an owner rather than a note on somebody's phone.
Quality Inspections
Punch list · NCR · Handover
12
The money view a finance director asks for
Cost against value by cost head, with forecast and margin on every line, over a cash-flow curve that runs to completion. One head is showing a negative margin, which is rather the point of running the reconciliation.
Cost-Value Reconciliation
Cash flow · Payment applications
Back to 01. A revision arrives and the same four stages run again, on the same data.
Four roles run the cycle above. 19 more run their own part of it, and each one gets a different set of modules.
190+ modules. Whatever your process is, it is in here.
Estimating, tendering, BIM, quantities, programme, quality, safety, cash flow, site.
Switch on the ones your job needs, leave the rest off, write your own.
Download
Get the real desktop app, free.
A native desktop build for Windows, macOS and Linux. One installer brings the full platform with its own built-in database, so there is nothing else to set up. Free, open source, and your data never leaves your disk.
Detecting your platform…
One installer, nothing else to set up
Data stays local
First launch ~60s, then fast
Open source, AGPL-3.0
Windows
Detected
Windows 10/11 - 64-bit installer
x64.exeWin 10+
Download the installer
Run it and accept the prompt
First launch takes about a minute, then the app opens
$curl -fsSL https://openconstructionerp.com/install.sh | sh
Reading latest release…
pip · Docker
One command and you are running
Python 3.12+DockerSelf-host
Install, then run
$pip install openconstructionerp
One line, app plus database
$docker compose up
PyPI · Docker Hub
One click, and the whole thing is in your language
The interface, the cost catalogues and the reports all switch together, so a designer in Warsaw, a quantity surveyor in Ankara and a site manager in Lyon can work in one project and each read it in their own language. Try it here.
What you actually get
The whole platform, not a trial
Estimating, takeoff, scheduling, documents, quality and CAD/BIM import, all in the download. Cost data for 48 markets and 44 interface languages come with it. No paid tier, no seat count.
It runs on your own machine
No account and no cloud in the middle. Projects stay in a folder on your own disk, and everything keeps working with the network switched off.
Nothing to maintain
Database, server and interface ship as one program. Updating means running the next installer, and removing it leaves only your data folder.
System requirements
64-bit Windows 10 or 11, macOS 12 or newer on Apple Silicon, or a current Linux. Around 2 GB of disk and 4 GB of memory is enough to work in comfortably.
The first minute
The first launch unpacks the database and takes about a minute, later starts take seconds. The app opens in your browser on your own machine with a demo project already loaded, so you can read a complete estimate before importing anything of your own.
Most open-source ERPs need an IT team and a development budget. This one does not: the desktop build installs like any other app, and you add a module by describing it in your own words.
what you were told to bring
A strong IT team and a budget for development.
what this one asks for
A laptop you already own, and about ten minutes.
One installer, nothing else
Nothing to orchestrate
No database to set up
No server to rent
No licence key
No consultant
One application, three places to put it.
The same build runs on a laptop, a rented server or your own rack. Start small and move up later without rewriting anything.
On the laptop you have
One installer with its own database and interface. It opens with no network at all.
Many people, one set of numbers.Roles, permissions and approval routes per module, so the whole team works on one project without overwriting each other.
Changing it is just as plain.
A module is a folder, not a fork. You never edit the core to add to it, which is why adding to it does not need a developer.
1Say what you need
Describe the module in the words you would use with a colleague. The builder writes the specification; you do not write code.
2Read every file first
Nothing is applied before you have seen it. The review step shows each file in full, and it stops there until you agree.
3Press install
The module is written to disk and picked up in the same moment. No restart, no second switch, no deployment window.
Someone already wrote the one you want?
Download the module, put the folder where the others are, reload the page. That is the entire procedure, and it is the same procedure for all of them.
The platform sits at the open centre of your software, not on top of it. Data flows in and out
through open formats, a documented API and webhooks, so your estimate, your model and your
finance system stay in step - and nothing you put in is ever trapped.
Claude
ChatGPT
DeepSeek
Gemini
Copilot
Cursor
OpenConstructionERPthe open core of your stack
AI-ready data and API
Product names and logos shown here belong to their respective owners and
appear only to identify the systems this platform exchanges data with.
Their use implies no affiliation with, sponsorship by, or endorsement
from those owners.
Accounting and ERP
Push priced bills, cost breakdowns and progress claims out as structured Excel, CSV or JSON, or wire them straight through the REST API, so the numbers land in your finance system without re-keying.
Excel / CSVJSONREST API
BIM and CAD authoring
Bring models and drawings in through open exchange formats - IFC for BIM, DWG and DGN for CAD - converted to one canonical model, and send review issues back out as BCF.
IFCDWG / DGNBCF
Document and cloud storage
Connect your document store over the REST API and webhooks, or keep a folder in sync, so drawings, contracts and reports have a single source of truth.
REST APIWebhooks
BI and reporting
Feed dashboards and data warehouses from the documented REST API and clean table exports in Excel, CSV, JSON and Parquet, the analytical column format, so the figures stay live instead of pasted.
ParquetJSONREST API
Project scheduling
Activities, durations and dependencies come in as XER or Project XML and go back out as Project XML or CSV, so the estimate and the programme share one set of tasks.
XERXMLCSV
Automation and webhooks
Subscribe to events with webhooks and drive the REST API from low-code automation flows built with n8n, our own workflow tooling, to connect anything to anything.
WebhooksREST API
No lock‑in, by design.
Every figure is exportable, the formats are open, and the same documented API that runs the app
is open to you. Your data stays yours - you can always take it with you.
Product names, logos and brands are the property of their respective owners and are shown only to indicate data-exchange compatibility. Their use does not imply any partnership, affiliation or endorsement.
Video guides
Five minutes a topic. Watch it, then do it.
Short walkthroughs on a real project in the app, from installing it to handing the job over.
Site & fieldAnswer an RFITurn a question from the working face into a tracked request, drive it to the…39 minOpen
Commercial & contractsTurn a change into a paid variationCapture a scope change while it is fresh, price it as a contract variation on…311 minOpen
Handover & lifecycleHand over and close outFinish the job cleanly: work the punch list to zero, confirm every inspection…514 minOpen
Planning & controlsBuild the baseline programmeTurn the agreed scope and the priced BOQ into a baseline programme: list the activities, set…512 minOpen
Commercial & contractsPrepare an interim payment applicationBuild the monthly interim application: measure the work done to date, value it against the…510 minOpen
Tendering & procurementIssue a procurement and buying scheduleTurn the BOQ and the programme into a buying schedule: list the packages to buy, set lead times…511 minOpen
Quality & safetyRun a safety walk and log observationsCatch the hazards before they hurt someone: walk the site against a checklist, raise the unsafe…37 minOpen
Handover & lifecycleSet up the asset register for FMBuild the asset register the operator will run the building from: capture the installed assets…411 minOpen
What ships in the box on the current release. Cost data, CAD formats,
modules and licensing, with the headline figures in one place.
cost database
0+
ready-to-use cost items across trades and assemblies.
updated monthly
CAD formats
0
native CAD ingest, DWG, RVT, IFC, DGN, DXF and GLB into one canonical format.
DWG · RVT · IFC · DGN · DXF · GLB
modules
0
plug-in modules covering the full site workflow, projects, BOQ, takeoff, tenders and more.
add & remove like packages
licensing
0%
open-source core under AGPL-3.0. No vendor lock-in. Your data stays yours.
AGPL-3.0 + Commercial
Built for your trade
One platform, shaped to how you build.
Pick the kind of company you run and the platform switches on exactly the modules that role needs,
already wired together in one shared database. Hover or tap a profile to watch its module honeycomb
light up, grouped by discipline and linked as a single connected system.
Every profile keeps the always-on platform core: projects, the cost database, resource catalog,
assemblies, dashboards and admin. Profiles never lock anything away, they simply lead with the modules
that matter most for the work, and you can add or drop any module later.
Engineers, construction firms and consultancies exploring OpenConstructionERP
A snapshot of the construction, engineering and infrastructure teams that signed up to try OpenConstructionERP or have worked with DataDrivenConstruction's open tools - across Europe, North America, MENA, APAC and Oceania.
Tegrity ContractorsPW Pole BarnsDigitarhOverzichtCSTBMideaForidaYutopiasMatritsVirtuzaTegrity ContractorsPW Pole BarnsDigitarhOverzichtCSTBMideaForidaYutopiasMatritsVirtuza
v15.0.0A data-driven estimating methodology engine, a full vector DWG and DXF takeoff, and construction machinery costed separately from installed equipment.2026-06-18
v7.3.0Schedule-quality validation pack with seven checks, in-app guidance across the platform (confidence badges, plain-language errors, glossary), and BIM grouping and search fixed in 26 languages.2026-06-08
v7.2.0Windows desktop install no longer hangs on a Turkish regional format, the AI Estimate Builder stops showing a fake price for an unpriced match, and the BIM filter panel is translated in all 26 languages.2026-06-08
v7.1.0A real desktop first launch with a provisioned local workspace, a conversational AI Estimate Builder with three named matching passes, and clash clusters tracked as one work item.2026-06-07
v7.0.1Desktop hotfix: the Windows app no longer exits silently after launch, reuses a running backend only when version and health match, and bundles the WebView2 runtime so first install needs no download.2026-06-06
v7.0.0AI Estimate Builder that walks any starting point to a priced bill, a useful module information card on every page, and a real collaboration hub with live comments, viewpoints and presence.2026-06-06
v6.10.0Field time and attendance with a payroll lifecycle, a cross-module project-controls dashboard, compliance enforced at contract gates, and AIA G702 and G703 payment applications.2026-06-05
Trust · standards & assurance
No black boxes. No lock‑in.
Plain facts you can check yourself: an open licence, open formats and your data on your own server.
Self-hosted, your data stays yoursProjects, drawings and costs live in your own database.
No telemetry by defaultNothing is phoned home. AI is opt-in and can run on your own models.
Open standards, read and writtenGAEB, BC3 and BCF in and out. DIN 276, NRM and MasterFormat built in.
GDPR-ready by designExport and deletion built in. You stay the data controller.
44 interface languagesSwitch the whole interface in one click.
open cost data
Nine cost bases. Every position built from resources.
Behind every rate sits its recipe: the labour hours, the materials and the machine time the work really takes. Every work item in these bases comes broken down that way, ready to reprice for your market.
9cost bases · eight national plus the global CWICR
120,441work items, each broken down into its resources
48markets to reprice a national base into, in local currency
Russia · CWICRGESN / FER / TER
55,719 works
RUBfull resource30 markets
TurkiyeBirim Fiyat
22,494 works
TRYfull resource
ChinaDinge
10,486 works
CNYfull resource
BrazilSINAPI
9,723 works
BRLfull resource
Spain · AndaluciaBCCA · FIEBDC-3
6,453 works
EURfull resource
Italy · ToscanaPrezzario Regione Toscana
5,836 works
EURfull resource
VietnamDinh Muc
4,299 works
VNDresource norms
IndonesiaAHSP
2,784 works
IDRresource norms
GreeceGGDE
2,647 works
EURfull resource
Worked examples from the bases above
Pick a national base - the same four works, each built from its own resources and article codes.
Every base has its own line items and article codes. Priced bases are shown in euro for a like-for-like comparison; the coefficient bases show resource quantities from the national norm. Every description stays in the language you picked.
04 · how it stacks up
How it compares to what you're using now.
A straight side-by-side. Commercial suites lead on a few things, mostly
integrations paid for over a decade. On everything else, OpenConstructionERP
already matches or beats them, at zero licence cost.
✓ fully supported ·
~ partial or via plugin ·
✗ not supported
modular by design
Add a module. Remove one. No rebuild.
Every feature is a self-contained package. Drop it in, pull it out - the running install picks it up in seconds, zero downtime.
☰BOQoe-boq
◈CAD / BIMoe-cad
−✶Takeoffoe-takeoff
+◐Reportingoe-reports
✓Validationoe-validate
−⎋Tendersoe-tender
+€Costs DBoe-costs
−⎘Documentsoe-docs
+⌖Regional pricesoe-regional
+your module goes here
under the hood
05 · developer experience
It's a module system, not a monolith.
Every feature is a Python package with a manifest. You can add one to a running
install without rebuilding anything. The APIs are typed; the OpenAPI spec is
generated, not hand-maintained.
Module SDK, scaffold one with make module-new
Typed REST API, auto-generated OpenAPI spec
Hooks & event bus, extend without forking
from openestimate import Client, Project
client = Client(url="https://api.yourco.com")
# Create a project and import CAD
project = client.projects.create(
name="Logistics Hub - Jebel Ali",
currency="EUR",
)
cad = project.cad.upload("./plans.ifc")
takeoff = cad.takeoff(ruleset="boq_quality")
# AI matches costs, you confirmfor pos in takeoff.positions:
if pos.confidence > 0.85:
pos.accept()
print(project.totals.grand)
# → Decimal('4_283_921.50')
OpenConstructionERP grows out of a decade of open construction‑tech research.
The cost database, CAD parsers and ML models it depends on were built and
refined inside the same open lab, and ship as part of the same ecosystem.
A note from the team
For the past decade our team has worked on resource management for construction projects. Along the way we got curious about how the industry’s tools came to be - from the first attempts at design automation to today’s ERP platforms - and that turned into a couple of longer pieces (“The Lobbyists’ Wars and the Development of BIM” and “The History of the BIM Map”). It’s hard to see where things are heading without a sense of how we got here.
We’ve written a fair amount on these topics over the years, and some of it found a wide readership. Alongside the writing, we’ve consulted for construction and consulting firms, developers, and software vendors on how they handle project data - treating it as the basis for decisions rather than a byproduct of them. That work let us see the industry from both sides: the people who build the tools, and the people who use them every day. A lot of those observations ended up in the book Data-Driven Construction, now available in 16 languages (datadrivenconstruction.io/books).
Two other problems kept us busy. One was helping non-developers get into proprietary file formats that were never meant to be opened. The other was finding a cleaner way to describe construction work through a resource model. Both produced free tools: the DDC CAD/BIM converters (Revit®, IFC, DWG, DGN → structured data) on GitHub, and CWICR, a multilingual database of construction works and resources - over 120,000 items in 11 languages, published as OpenConstructionEstimate-DDC-CWICR.
All of it was groundwork for something we’d wanted to build for a long time: an open, modular ERP for construction. The latest generation of tooling finally made it practical to pull the methodology, data models, and earlier implementations together into one platform. It’s now public and open source.
In our experience the best ideas tend to come out of conversation - and out of disagreement. If the questions around construction’s move toward “Uberization,” and toward more transparent cost and time estimation, are interesting to you, we’d be glad to have you in that discussion.
DataDrivenConstruction Team
datadrivenconstruction.io
Development and Contribution Model
OpenConstructionERP has been under continuous development for more than six years and has benefited from contributions, feedback, testing, and domain expertise from many different people.
To maintain a consistent architecture and reduce security, dependency, and integration risks, the project follows a centralized integration model. Most production code is reviewed, consolidated, tested, and published through a single maintainer account. The GitHub contributor history does not necessarily reflect the actual number of people who have contributed.
A single publishing account represents a controlled integration and release process designed to preserve stability, security, and architectural consistency across the platform's interconnected modules.
Engineers, contractors and consultancies - clients and users of DataDrivenConstruction
ShapemakerScholze-ThostVRAMEAXIA EnergiaAFRYHofschröerTDFRenaissance ConstructionShapemakerScholze-ThostVRAMEAXIA EnergiaAFRYHofschröerTDFRenaissance Construction
Hyundai AutoEverSintagmaTrafikverketTMM GroupDar Al Riyadhpbs IngenieureZPPSCON GmbHHyundai AutoEverSintagmaTrafikverketTMM GroupDar Al Riyadhpbs IngenieureZPPSCON GmbH
Most civil design files are basically data prisons. Loads of useful info, alignments, surfaces, quantities, just sitting there, locked inside formats that were never meant to play nice with anything outside their original software. I’ve wasted way too much time trying to answer simple questions like ‘how many manholes are in this job?’ or ‘what’s the volume by phase?’, only to find out the data’s buried five layers deep in a DWG or DGN. Data Driven Construction fixes that. Their converters crack open these closed formats and give you structured data you can actually use, in Power BI, in Excel, or even in an LLM prompt if you’re doing something fancy. It’s not flashy, but it’s insanely useful. If you’re trying to move beyond screenshots and PDFs and actually use your design data, this is the kind of tool that makes it possible. It’s the difference between guessing and knowing. And honestly, it’s saved me more than a few Saturday mornings.
Chris Andrew
AECOM · Digital Transformation Technical Lead & Associate Director
Be part of the movement with DataDrivenConstruction! Let’s make true freedom in data formats a reality and catalyze a new era of productivity and innovation in construction. The real and necessary journey from closed to “open” formats has not even started: True freedom in data formats, free from proprietary ties and accessible to all, is what we need to unlock innovation and collaboration across the construction industry, particularly benefiting the 99% of construction, i.e. SMEs and unchaining the sector for accelerated growth.
Prof. Dr.-Ing. Michael Bühler
Co-Owner, GemeinWerk Ventures
Two ways in
Use it yourself, or build a business on it.
For your own company
Use it yourself
The whole platform is free, and nothing in it is hidden.
Two paths. Run it yourself for free under AGPL-3.0, or talk to us when you need
hosted support, a commercial license for the converters, or anything else that
shouldn’t live in the open-source license.
Self-hosted
Free· AGPL-3.0
The full open-source platform. Run it on your infra, no strings attached.
When you need managed hosting, commercial licensing for the converters, or anything that doesn’t fit under AGPL, tell us what you need and we’ll scope it.
Public workshops shown below. Many major enterprise engagements remain under NDA.
ETH Zürich FOCDrees & SommerLindner GroupOTWBShapeMakerUnder NDADigitales BauenBauindustrie Bayern & TUMBIM Cluster BWBIM DAY GENFHerbert GruppeUnder NDA
Awesome workshop, Artem! Preparations are in full swing! I’m already looking forward to the hackathon in the new year! 💪🏻
Andreas Tomaschewski
Drees & Sommer · Head of Digital Transformation
What happens when you not only organize construction processes, but also analyse them intelligently? This was the topic of our workshop with Artem Boiko on “Data-Driven Construction”. The focus was on the question of how we can make better use of existing data - to make construction projects more efficient, more transparent and less error-prone. Using specific application examples, Artem showed how structured construction data can help to maintain an overview, identify supplements at an early stage and improve communication between planning and execution. Particularly exciting: how digital tools and models can already be used today to automate processes. Data-driven construction is no longer a topic for the future - we are right in the middle of it. The workshop showed how great the potential is if we work together and really make data work for us.
Stefan Traxinger
Lindner Group · Head of Department, BIM Professional
Artem Boiko delivered an outstanding presentation to the entire Shapemaker team, providing deep insights into data migration from engineering software and related topics. His expertise and clear communication made complex concepts easy to grasp, equipping our team with practical knowledge we can apply immediately. Highly recommend his services for anyone seeking clarity and actionable strategies in this space!
Evan Ramenskiy
Shapemaker · CRO & Co-founder
Ich fande DataDrivenConstruction Workshop sehr interessant. Meiner Meinung nach konnten alle folgen. Man merkt auch anhand deiner Folien wieviel Zeit, Ausdauer und Mühe du hineingesteckt hast. Auch die Live Präsentationen waren super. Das einzige was ich bemängeln würde, wäre die Anzahl der Folien, dadurch kamen zu viele slides zustande. Aber das ist meckern auf dem höchsten Niveau. Rundum war es der beste Workshop bei dem ich war. Außerdem bist du auch eine sehr angenehme Person.
Kai Schmitt
Dimexcon · Softwareingenieur für BIM Automatisierung
Die DataDrivenConstruction Schulung fand ich insgesamt wirklich spannend und sehr bereichernd. Besonders gut gefallen haben mir: der „historische“ Hintergrund zu den verschiedenen CAD-Softwares (das war spannend zu hören und hatte etwas von Investigativjournalismus); der interessante Ansatz zur Automatisierung über DataFrames; deine eigenen praxisnahen Beispiele zur Prozessautomatisierung im Bauwesen; und der Einblick in aktuelle Trends wie Claude Code und OpenClaw, du hast das Thema mit Leben gefüllt. Einziger Nachteil: Es war wirklich viel Input in nur zwei Tagen. Gleichzeitig hast du sehr gut aufgezeigt, wie wir uns selbst weiter orientieren können, zum Beispiel über das strukturierte Aufzeichnen unserer Prozesse im Miro-Board. Vielen Dank nochmal für die Schulung und den Austausch.
Philip Becker
Herbert Gruppe · Teamleiter Vorfertigung
It was a fantastic workshop with exciting content that we, and I personally, learned a lot from. Thank you for taking so much time for us. We look forward to trying out what we learned as soon as possible and incorporating it into our projects! #bleedingedge
Lukas Fuchs
D&S · BIM Manager
Tell us what you’re after. Every message gets a real reply.
I work on this project solo, so I prioritize teams that are ready to allocate real resources to a pilot, budget, timeline, a sponsor. Send the brief and I’ll get back to you within a few days.
Yes. The core is AGPL-3.0 on GitHub.
You can self-host forever, audit every line, fork it, or run it in production.
We also offer a commercial license for enterprises that can’t use AGPL.
What hardware do I need to run it?
The core runs on a 2 GB VPS. One PostgreSQL instance is all you need for a small team.
AI features (takeoff, vector search) are optional. Features degrade gracefully
when AI services aren’t available.
How do I import from my existing system?
Native GAEB XML (X83 / X84 / X89), Excel and CSV import are built in. Connectors for
proprietary systems ship as modules, the marketplace already has a handful,
including workflow integration via n8n. Custom migrations are available via Enterprise support.
Do I need AI services to use the product?
No. The BOQ editor, validation pipeline, CAD ingest and cost database all work without AI.
AI takeoff and semantic search are optional enhancements. You can bring your own
model or use the hosted CV/LLM services via Pro.
Who’s behind this?
Built by the DataDrivenConstruction team with help from open-source contributors.
The same team is behind of CWICR (the 120,000-item cost database shipped here) and cad2data,
with 10+ years of construction-tech engineering behind both. We ship our own tools on it.
Can I contribute a module?
Absolutely. The SDK ships with a cookiecutter template, scaffold a module in one
command, drop it in the marketplace when it’s ready. Good candidates: regional cost
databases, ERP connectors, custom validation rule sets.
Where is my data stored? Does anything leave my server?
On your infrastructure. Projects, drawings and cost data live in your PostgreSQL and your
object storage. Nothing is phoned home, no telemetry by default. If you enable hosted
AI services, only the payload you send is processed; it’s opt-in per workspace and you
can point the client at self-hosted models instead.
What CAD and BIM formats are supported?
DWG, DGN, RVT, IFC, DXF and GLB ingest through the cad2data pipeline into a canonical format,
one schema to query, classify and cost against. PDF drawings go through the takeoff
pipeline (vector extraction + OCR). New formats land as modules, not core rewrites.
How does the commercial license work?
AGPL-3.0 is fine for most internal and service use. If you embed the product in a closed
SaaS, ship it inside a proprietary application, or need an explicit waiver for procurement,
talk to us. Commercial terms cover that, plus priority support and enterprise SLA.
No per-seat metering, no forced cloud.
Can I migrate away later?
Yes, and we mean it. Everything you put in comes back out, GAEB XML, Excel, CSV,
JSON, Parquet, or a direct PostgreSQL dump. The schema is documented, the source is open;
no proprietary file formats, no escrow games, no hostage data.
How often do you ship updates?
Minor releases roughly every 2-3 weeks, patch releases as needed. Changelog lives on
GitHub, every tagged version has a Docker image, and migrations are reversible. You decide
when to upgrade. Self-hosted means nobody forces a deploy window on you.
Which languages and regions are supported?
45 languages ship in the core i18n. Cost database labels, validation rule sets and
classification trees are per-region modules, pick the ones you need, add your own.
No hard-coded currency, no hard-coded date format.
Partner Program · Founding cohort
Free platform. Your business on top.
The whole platform is open source and free for everyone. Around it you build your own business: install it, tailor it, support it and teach it.
The platform: free and open to everyone.
All 190+ modules are free, and the ones drawn below are a sample.
There is no paid tier and nothing is held back for one: clone,
run, fork. No licence fees, no per-seat metering, no expiry.
free forever
Free for everyoneYour business
01 · plan
Estimate
scope, cost, time
◫
Projects
portfolio
☰
BOQ
assemblies
€
Costs
120k items
◷
Schedules
4D gantt
∿
Risk
register
⎈
Resources
crews · roles
02 · design
BIM & CAD
model in, data out
✶
Takeoff
AI auto
◈
CAD / BIM
DWG · IFC
⌗
Drawings
register
⊘
BCF / Issues
model defects
✓
Validation
compliance
⌬
Clash detect
model checks
03 · procure
Tender
bids, suppliers
⎋
Tenders
bid packs
⌖
Procurement
POs · approvals
⌘
Subcontractors
scopes · subs
⊠
Vendors
supplier DB
§
Contracts
awards
04 · execute
Site
progress, labour
⚙
Site tasks
daily
⊟
Daily log
site journal
◉
Photos
site capture
⊙
Time tracking
labour hours
▣
Inventory
materials
⛭
Equipment
fleet
05 · control
Quality & comms
checks, RFIs, safety
⦿
Quality
QA · QC
☑
Punch list
snags · defects
⊕
Safety
HSE
?
RFIs
requests
⊿
Submittals
approvals
06 · money
Finance
payments, change
⎔
Cashflow
forecast
↺
Change orders
variations
¤
Payments
progress claims
⊞
Budgets
vs actuals
07 · close
Reporting
handover, KPIs
⎘
Documents
revisions
◐
Reporting
exports
▦
Dashboards
KPIs
✿
Handover
warranty
190
built-in modules
7
workflow phases
120k
cost-DB items
€0
licence fees, ever
100%
on GitHub
Your business: this is where you earn.
You sell services and licences on top of the free platform. Services are 100% yours.
partners earn here
Implementation100%
Discovery, configuration, data migration, go-live. DDC never quotes this work.
Training100%
Workshops, certifications, custom curricula. Branded by you, billed by you.
Support & SLA100%
Production support, incident response, monitoring. Your team, your retainer.
Commercial licences
OCERP commercial licence, CWICR cost DB and cad2data converters (DWG · RVT · IFC · DGN). Resold by partners at tier rate.
Custom modules100%
Bespoke modules built per client - BIM connector, country cost matrix, ERP bridge. Your team, your timeline.
One command and the full ERP is running. PostgreSQL is built in, nothing else to set up.
See the install docs.
No credit card requiredSelf-host on your infraAGPL-3.0 forever
Practice atlas · the deeper view
Where to look after the homepage.
Four reference pages built on what OCERP actually ships in v15.0.0 -
code‑level audited, no marketing fiction. Take the assessment to find your starting point,
then go deeper into practices, industries and standards.
+
more modules
See the module system
Claude
ChatGPT
DeepSeek
Gemini
Copilot
Cursor
4:41
How to Install OpenConstructionERP | Windows Setup & First Project
Install on Windows, open the sample project, set your language and region, pick your modules and invite your team.
12:00
Quantities, BOQ and AI estimating. On your own laptop.
A short walkthrough of the whole pipeline - drawing in, tender out. No voiceover, no narration, just the product doing what it does.
4:48
Build a Construction Estimate Step by Step
Builder's Playbook: Getting Started
5:55
Mengen aus PDF und DWG ermitteln
Lernprojekt Landshut
5:34
GAEB-Dateien kontrolliert austauschen
Lernprojekt Landshut
4:23
Tender Work to Subcontractors
Builder's Playbook Canada: Ontario
4:45
Manage Construction Change Orders
Builder's Playbook Canada: Ontario
5:23
Chantier : suivre les heures et le matériel
Builder's Playbook : gestion de chantier
3:44
Réception des travaux et déficiences
Builder's Playbook Québec
OpenConstruction Academy
Full series in English, German and French
All videos on YouTube
PDMS
Brevart
Tekhne
ATMIID
Optimum Technology
Erbud
AtkinsRéalis
Mace Group
Swietelsky
Teichert
Elevait
MAD Engineers
Construccions 360 Plus
LMH
ILO
Niven Builders
DK Construction
Consolis
Colas
Max Bögl
Colas Rail
Unispace
Arkad
Basil Read
C&C Consulting
Tegrity Contractors
PW Pole Barns
Digitarh
Overzicht
CSTB
Midea
Forida
Yutopias
Matrits
Virtuza
Russia · CWICRGESN / FER / TER
TurkiyeBirim Fiyat
ChinaDinge
BrazilSINAPI
Spain · AndaluciaBCCA · FIEBDC-3
Italy · ToscanaPrezzario Regione Toscana
VietnamDinh Muc
IndonesiaAHSP
GreeceGGDE
AECOM
Drees & Sommer
VINCI Energies
Lindner
Artelia
bechtle
Merck
RBS wave
Shapemaker
Scholze-Thost
VRAME
AXIA Energia
AFRY
Hofschröer
TDF
Renaissance Construction
Hyundai AutoEver
Sintagma
Trafikverket
TMM Group
Dar Al Riyadh
pbs Ingenieure
ZPP
SCON GmbH
