What it is
OpenConstructionERP is a construction cost estimation and project management platform covering quantity takeoff, BOQ preparation, tendering, project execution, quality management, and financial control. Its BOQ tools organize hierarchical sections, positions, resources, and assemblies, with automatic markups. Documentation describes more than 120,000 cost items across 48 market editions and 36 regional databases ready to import. Quantity extraction from RVT, IFC, DWG, and DGN files is supported through DDC converters. Planning features include Gantt scheduling with CPM, Earned Value Management, S-curves, and Monte Carlo simulation. The platform exposes a REST API and documents Excel, CSV, and GAEB XML import and export. Its Common Data Environment includes ISO 19650 status workflows, revision management, and role-based access controls. The maker says self-hosted project data stays on the customer's hardware and files are not uploaded. The self-hosted plan is free under AGPL-3.0 and includes the full platform, cost items, modules, and community support. Paid offerings include a regional cost database, converters, licences, support, and implementation. Desktop downloads list Windows 10/11 64-bit, macOS 10.15+ on Apple Silicon, and 64-bit Linux.
Who it suits. It is presented for construction teams, including general contractors, specialist subcontractors, and quantity surveying teams. Self-hosting may suit teams wanting project data to remain on their own hardware.
Good
- Free self-hosted plan under AGPL-3.0.
- BOQ tools include resources, assemblies, and automatic markups.
- Documents more than 120,000 cost items.
- Supports quantity extraction from four listed file types.
Watch for
- CAD/BIM quantity extraction requires DDC converters.
- Commercial licence costs 2500.00 EUR per once.
- Accounting integrations are listed as unavailable.
Verdict
OpenConstructionERP covers estimating through project execution, with self-hosting and documented data exchange options. Teams should account for paid converters or licences where needed and check the listed desktop system requirements.
Plans and prices
| Plan | Price | Billed |
|---|---|---|
| Self-hosted | €0 | — |
| CWICR cost database | €750 once | — |
| Priority SLA | €1,200 a year | annual |
| cad2data converters | €1,800 a year | annual |
| DDC cad2data converters | €1,800 a year | €1,800 per year |
| Commercial licence | €2,500 once | first-year updates/support included; 20%/yr thereafter |
| Implementation | €3,000 once | from €3,000 |
| White-label | €5,000 once | — |
From OpenConstructionERP's own pricing page, checked 15 Oct 2026. Every plan
What the maker publishes
- API scope
- Documented endpoints cover authentication, projects, BOQs, cost search, AI quick estimates, CAD extraction and health checks. source
- Built-in modules
- The product advertises more than 190 built-in modules that can be enabled or extended. source
- CAD and BIM
- The platform supports quantity extraction from RVT, IFC, DWG and DGN via DDC converters. source
- Commercial management
- The platform includes RFIs, variations, submittals, contracts, inspections, punch lists, non-conformance records, cash flow and payment applications. source
- Company legal setup
- The imprint identifies OpenConstructionERP as an AGPL-3.0 project represented by founder and developer Artem Boiko in Graben-Neudorf, Germany. source
- Company profile
- LinkedIn lists DataDrivenConstruction as a public software-development company founded in 2023 with 2–10 employees and headquarters in Bruchsal-Untergrombach, Germany. source
- Compliance workflow
- Its Common Data Environment documents ISO 19650 status workflows, revision management and role-based access controls. source
- Cost data
- The documentation describes 120,000+ cost items across 48 market editions, with 36 regional databases ready to import. source
- Cost estimating
- Its rate library stores minimum, average and maximum values and can price bills from regional unit and composite rates. source
- Data library
- The documentation describes more than 120,000 priced items spanning more than 40 regions and 44 interface languages. source
- Documentation
- The documentation covers installation, BOQ editing, cost databases, CAD/BIM takeoff, AI estimation, scheduling, finance, procurement, quality, safety, BIM, reporting, modules and API configuration. source
- Estimating
- Its BOQ tools include hierarchical sections, positions, resources, assemblies and automatic markups. source
- Extensibility
- Modules are Python packages with manifests and can be scaffolded with oe-sdk or make module-new; hooks, events, permissions and validation are exposed to extensions. source
- File formats
- The product lists IFC, DWG, DGN, RVT, DXF, GLB, GAEB XML, BC3, BCF, XER, XLSX, CSV, JSON, Parquet and PDF exchange. source
- Independent community praise
- A Reddit construction commenter recommended it as open-source, construction-focused software with native job costing, purchase orders, financials and project management without licensing costs. source
- Independent description
- OpenSourceTools.org calls it the most complete of three construction-specific open-source options, combining estimates, schedules, tenders, contracts, site tasks, reports, BOQ, 4D scheduling, 5D control and CAD/BIM takeoff. source
- Independent maturity limit
- OpenSourceTools.org characterizes the project as ambitious, recently released and not yet a mature all-in-one replacement for commercial suites. source
- Integrations
- The product exposes a REST API for integrations, automation and custom workflows, and documents Excel, CSV and GAEB XML import/export. source
Review
Overview
OpenConstructionERP brings estimating and project controls together for construction teams. Its scope runs from quantity takeoff and bills of quantities (BOQs) through tendering, project execution, quality management and financial control. That makes it relevant to the work behind a build or renovation: preparing quantities and costs, organizing bids, and tracking delivery.
The BOQ workflow can be organized into sections, positions, resources and assemblies, with automatic markups. The documentation describes more than 120,000 cost items across 48 market editions, with 36 regional databases ready to import. Digital takeoff, an assembly library, and labor and material costing are also listed capabilities.
This is construction-team software rather than a homeowner-facing directory of finishes or materials. The maker describes workflows for general contractors, specialist subcontractors and quantity surveying teams.
Key features
Estimating and takeoff
Hierarchical BOQs give teams a way to structure estimates from larger sections down to positions and the resources or assemblies used in them. Automatic markups are included. For teams working from design files, quantity extraction from RVT, IFC, DWG and DGN is supported through DDC converters; those converters are separately priced.
The cost-data documentation covers 48 market editions and more than 120,000 cost items, while 36 regional databases are described as ready to import. A separate CWICR cost database option provides one region with more than 55,000 priced items.
Planning and project controls
Scheduling includes Gantt planning with critical path method (CPM), Earned Value Management, S-curve analysis and Monte Carlo simulation. These tools extend the product beyond cost preparation into planning and monitoring project execution.
Documents, workflows and integrations
The Common Data Environment documents ISO 19650 status workflows, revision management and role-based access controls. The product also exposes a REST API for integrations, automation and custom workflows, and documents import and export for Excel, CSV and GAEB XML.
The maker says that with self-hosting, project data stays on the customer's hardware and files are not uploaded or sent back to the maker. Teams should weigh that data-control approach alongside their own hosting and administration needs.
Pricing
OpenConstructionERP lists a free self-hosted plan, while several capabilities and services have separate charges. Prices and billing terms are:
| Plan or service | Price and term | What is listed |
|---|---|---|
| Self-hosted | 0.00 EUR per free | Full platform, 120,000+ cost items, 190+ modules and community support; billed Free · AGPL-3.0 |
| CWICR cost database | 750.00 EUR per once | One region, 55,000+ priced items; billed €750 one-time / region |
| Priority SLA | 1200.00 EUR per year | Optional upgrade on top of maintenance; billed €1,200 per year |
| DDC cad2data converters | 1800.00 EUR per year | RVT, IFC, DWG and DGN converters; per-server or embedded SDK licence; billed €1,800 per year |
| Commercial licence | 2500.00 EUR per once | Single company, unlimited internal users, first year of updates and support included, then 20% per year; billed €2,500 one-time |
| Implementation | 3000.00 EUR per once | Onboarding, data migration and training; billed from €3,000 one-time |
| White-label SaaS | 5000.00 EUR per once | Up to 10 paying organisations, plus €1,500 per extra 10; billed €5,000 one-time |
| Maintenance | Price not listed | Updates and standard support, first year included; billed 20% per year, from year 2 |
| Hosted & licensed | Price not listed | Managed hosting, private deployments and commercial licensing; billed Get in touch |
A free trial is listed. Community support is available through GitHub, documentation and the community forum; paid licences also describe email or priority support.
Platforms
OpenConstructionERP lists API, Linux, macOS, self-hosted, web and Windows platforms, and is classified as hybrid. The desktop download page specifies Windows 10/11 64-bit, macOS 10.15+ on Apple Silicon, and 64-bit Linux as supported systems. Those desktop requirements are more specific than the general platform list, so teams should check them against their devices before choosing a deployment.
Who it's for
The product is aimed at construction teams that need estimating and project workflows, including general contractors, specialist subcontractors and quantity surveying teams. A contractor preparing BOQs, pricing labor and materials, or coordinating schedules may find its combination of estimating, planning and document control relevant. The free self-hosted plan also gives teams an option to run the platform on their own hardware.
It is less directly suited to homeowners looking only to compare products for a single room or select finishes. Its listed capabilities focus on project quantities, costs and controls, not consumer-facing design selection. Teams seeking accounting integrations should note that accounting integrations are listed as unavailable.
Pros and cons
- Pros: The free self-hosted plan includes the full platform, and the described estimating scope spans BOQs, takeoff, cost items, assemblies and markups.
- Pros: Scheduling, quality workflows, revision management and data exchange options extend beyond estimating.
- Pros: Self-hosting is presented as a way to keep project data on customer hardware.
- Cons: CAD and BIM quantity extraction requires separately priced DDC converters.
- Cons: Accounting integrations are not listed as available.
- Cons: Desktop support is specified for particular operating-system versions and architectures.
Alternatives
For a broader comparison, start with our Construction estimating software list. Other products to consider include Trimble Viewpoint Vista, Buildxact, InEight, Bidwright, PlanSwift, QuoteSoft, HCSS and CostX.
Verdict
OpenConstructionERP is a substantial construction-workflow option on paper, combining BOQ-based estimating and cost data with scheduling, document controls, quality management and financial control. Its free self-hosted plan and stated approach to keeping data on customer hardware may matter to teams that want control over deployment. Before committing, account for the separate charges for regional cost data, CAD and BIM converters, implementation or paid support, and confirm that the desktop platform requirements fit the team's systems. It is best assessed as software for contractors and quantity surveying teams, not as a tool for homeowners choosing building materials.