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massing

Open-source, self-hosted, IFC-native AEC platform featuring in-browser BIM modeling, a general contractor portal, and development proforma tools.

  • Frontend
  • Backend
  • Full stack
  • DevOps
  • Product
  • Automation
  • Data analysis
  • Productivity
  • Collaboration
  • Web
  • Desktop
  • Windows
  • macOS
  • Linux
  • Browser
  • Self-hostable
  • Runs locally
  • Docker supported
Open websiteView on GitHub
massing screenshot
Popularity
129 Stars
GitHub stars
Recent activity
8/24/2026
Updated in the last 30 days
License
MIT
Permissive

Why it matters

We look beyond stars: what problem it solves, whether it creates real utility, and what makes its approach worth noticing.

Last 90 days

Problem

The architecture, engineering, and construction lifecycle suffers from extreme fragmentation, with land acquisition, BIM design, GC workflows, and operations locked in siloed proprietary systems.

Practical value

Delivers an in-browser, IFC-native BIM authoring tool combined with general contractor modules and a proforma financial engine, reducing licensing costs through open-source self-hosting.

Innovation / differentiation

Unifies browser-based open BIM authoring with construction project management and financial underwriting onto a single IFC model, eliminating format conversion loss across phases.

Leverage potential

Uses IFC as the single source of truth to bridge code compliance checks, construction document generation, scheduling, and accounting, offering high leverage for project teams.

Why now

Growing demand for open BIM standards and data sovereignty makes self-hosted, collaborative engineering platforms timely as the industry moves away from per-seat licensing.

Community activity

In the last 90 days there were 1 new issues and 335 pull requests; the bounded issue/PR samples include 1 issue authors and 1 PR contributors, with at least 50 releases.

Maintainer responsiveness

The 1-issue window sample had a 100% close rate, and the 100-pull-request sample had a 51% merge rate. Maintainer-comment observations covered only 100% of that issue sample, so response rate and first-response speed are not reported.

1 contributors in PR sampleAt least 50 releasesPR merge rate 51% · 100 sampled in window

Key highlights

  • In-browser BIM authoring and native IFC editing
  • Construction document generation (plans, sections, elevations, schedules) and MasterFormat specs
  • Nearly 100 general contractor (GC) portal modules covering RFIs, submittals, pay apps, and schedules

Quick start

How it is installed, how hard it is, and where to start.

Where it runs

Docker

Difficulty

Medium — some setup needed

Docker supportedSelf-hostableRuns locally
  1. 01Start the full stack web and API services using Docker
  2. 02Run the seed data script to load demo projects across modules
  3. 03Alternatively, download and install the signed desktop application for Windows, macOS, or Linux

Best for

  • Teams that want data on their own servers
  • Developers who want to try it on their machine
  • People who prefer Docker deploys

More about it

Massing is an open-source, self-hosted, IFC-native AEC platform combining a BIM authoring environment, a general contractor (GC) portal, and development proforma tools around a single IFC-keyed model.

It provides an in-browser BIM authoring tool to draw and edit architecture, structure, and MEP components, while automatically generating permit-ready construction documents and code compliance checks. With nearly 100 GC modules and project underwriting capabilities, it covers the entire building lifecycle from land acquisition to operations.

Sources

Each field shows its status and source — expand to review.

15 · Expand

  • capability tags

    Verified

    automation, data_analysis, productivity, collaboration

    Source: admin_cms · cms editor · 8/25/2026

  • editor note

    Verified

    {"en":"Built on That Open and IfcOpenShell, this project delivers genuine in-browser BIM authoring and IFC editing, well-suited for AEC teams managing full project lifecycles. Requires Docker for full stack deployment.","zh":"该项目基于 That Open 与 IfcOpenShell 构建，实现了真正意义上的浏览器内 BIM 建模与 IFC 原生编辑，适合建筑工程与总承包企业进行全生命周期数据协同。运行完整栈需要通过 Docker 部署。"}

    Source: admin_cms · cms editor · 8/25/2026

  • how to use

    Verified

    {"steps":[{"en":"Start the full stack web and API services using Docker","zh":"通过 Docker 启动完整后端与网页端服务"},{"en":"Run the seed data script to load demo projects across modules","zh":"运行种子数据脚本以加载各模块的演示项目"},{"en":"Alternatively, download and install the signed desktop application for Windows, macOS, or Linux","zh":"或直接下载并安装适用于 Windows、macOS 或 Linux 的签名桌面客户端"}],"installAt":"docker","difficulty":"medium"}

    Source: admin_cms · cms editor · 8/25/2026

  • intro

    Verified

    {"en":"Massing is an open-source, self-hosted, IFC-native AEC platform combining a BIM authoring environment, a general contractor (GC) portal, and development proforma tools around a single IFC-keyed model.\n\nIt provides an in-browser BIM authoring tool to draw and edit architecture, structure, and MEP components, while automatically generating permit-ready construction documents and code compliance checks. With nearly 100 GC modules and project underwriting capabilities, it covers the entire building lifecycle from land acquisition to operations.","zh":"Massing 是一个开源、自托管、以 IFC 为核心的 AEC（建筑、工程与施工）平台。它将 BIM 平台、总承包商（GC）门户以及开发财务测算功能整合到同一个基于 IFC 的数据模型中。\n\n平台提供网页端 BIM 建模工具，支持从零开始绘制或编辑建筑、结构、机电（MEP）构件，并自动生成符合规范的施工图纸与合规检查报告。同时内置近百个总承包管理模块与项目财务测算工具，贯穿土地收购、设计、施工到运营的完整建筑生命周期。"}

    Source: admin_cms · cms editor · 8/25/2026

  • Latest release

    Verified

    v0.3.1074

    Source: GitHub API · latest_release=v0.3.1074 · 8/24/2026

  • License

    Verified

    MIT

    Source: GitHub API · license.spdx_id=MIT · 8/24/2026

  • needs api key

    Verified

    No

    Source: admin_cms · cms editor · 8/25/2026

  • One-liner

    Verified

    {"en":"Open-source, self-hosted, IFC-native AEC platform featuring in-browser BIM modeling, a general contractor portal, and development proforma tools.","zh":"基于 IFC 标准的开源、自托管 AEC 平台，提供网页端 BIM 建模、通用承包商门户及开发财务测算工具。"}

    Source: admin_cms · cms editor · 8/25/2026

  • Platforms

    Verified

    windows, macos, linux, browser

    Source: admin_cms · cms editor · 8/25/2026

  • Category hint

    Inferred from materials

    ai-apps

    Source: Project README · hint=ai-apps · 8/24/2026

  • product forms

    Verified

    web, desktop

    Source: admin_cms · cms editor · 8/25/2026

  • role tags

    Verified

    frontend, backend, fullstack, devops, product

    Source: admin_cms · cms editor · 8/25/2026

  • supports docker

    Verified

    Yes

    Source: admin_cms · cms editor · 8/25/2026

  • supports local

    Verified

    Yes

    Source: admin_cms · cms editor · 8/25/2026

  • supports self host

    Verified

    Yes

    Source: admin_cms · cms editor · 8/25/2026

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