Overview

Developed at IGN and ENSG within the LASTIG lab, MicMac is open-source software distributed under the CeCILL-B license and maintained by ENSG’s Department of Aerial and Spatial Imagery. It can produce 3D models and ortho-imagery, with tools to georeference results in local, global, or absolute coordinate systems. That combination makes it a serious option for mapping and measurement work, not just visual model creation.

MicMac began as a tool for experts and researchers, and it remains aimed mainly at professional and academic users. It has also been adopted in areas including architecture, archaeology, and forestry, with efforts to make it more accessible to the general public. That wider reach does not remove the learning and installation demands of a technically rich workflow.

Key features

The C3DC command computes a point cloud from oriented images. For users who need to judge reconstruction quality, MicMac exposes bundle-adjustment residuals, covariance matrices, parameter sensitivity, and correlation images. These indicators offer more analytical insight than a workflow that leaves processing opaque, but they are most useful to people comfortable interpreting technical results.

MicMac supports frame cameras, pushbroom sensors, and scanned analogue images, alongside multiple camera calibration models and dense two-dimensional matching for deformation studies. Its architecture is adapted to big datasets, and users can work with intermediate results in open data formats at different stages of processing. Together, these capabilities suit varied professional projects; they also make the software a more involved choice than a narrow, preset-driven reconstruction tool.

Reconstruction products can be delivered in a desired coordinate system. ChgSysCo, OriConvert, and GCPConvert with the ChSys option transform coordinates between systems. AperiCloud visualizes a sparse 3D cloud with camera positions and orientations, with MeshLab used to view it; however, AperiCloud does not support 64-bit PLY, and its documentation recommends local or truncated coordinates for that tool.

The site provides tutorials for workflows such as image matching, camera orientation, dense point clouds, video processing, and historical orthoimagery, as well as documentation, a wiki, and a user forum. That material gives new users several routes into a broad workflow, though it does not make MicMac a one-click application.

Pricing

MicMac is free and open source. Its MicMac plan costs 0.00 USD per free and includes the photogrammetric suite under the CeCILL-B licence. There is no free trial because the software is already free; no subscription or seat charge is stated. The free plan has no published quota in the plan terms, and the software supports point cloud and orthophoto export as well as ground control points.

There is no cheaper tier to trade features against: the main cost is the technical effort involved in setup and use. Users who need commercial software support or a guided service should compare other options rather than expect those services as part of this plan.

Platforms

MicMac is available for Linux, macOS, and Windows as desktop software. Windows users can get binary downloads through GitHub releases: v1.1 is 64-bit and v1.0.beta10 is 32-bit. The Mac guide describes compiling from source with Homebrew and CMake, and warns that the latest revision may be unstable or may not compile on a given operating system. Building from source uses tools including Git, CMake, make, ImageMagick, exiftool, exiv2, and PROJ; some GUI tools also require optional Qt or Xlib. A precompiled Docker image is described in the repository, along with instructions to build an image from its Dockerfile.

Who it's for

MicMac is a strong fit for researchers and practitioners in cartography, environmental work, industry, forestry, heritage, and archaeology who need control over image processing, measurement, or georeferencing. Its support for multiple image sources, large datasets, and open intermediate results is particularly useful when a project does not fit a simple camera-to-model path.

It is less suitable for casual users who want a streamlined mobile capture experience or for Mac users unwilling to compile and troubleshoot software. Anyone choosing it should be prepared to work with technical tools and coordinate systems rather than expect setup and processing to be fully guided.

Pros and cons

Pros

Free, open-source software across Linux, macOS, and Windows, with no paid tier needed to access the suite.
Quality indicators and open intermediate results let experienced users examine and interact with reconstruction stages.
Broad image-source support, large-dataset architecture, and coordinate-system tools suit demanding mapping and research work.
Point cloud and ortho-imagery outputs cover two major photogrammetric deliverables.

Cons

Source-building requirements and the Mac guide’s compilation warning make setup less predictable than a packaged, guided app.
The technical workflow may be excessive for users who want quick reconstruction without interpreting metrology or coordinate systems.
AperiCloud’s lack of 64-bit PLY support limits that visualization route, with local or truncated coordinates recommended.

Alternatives

COLMAP is another free option for Linux, macOS, web, and Windows; consider it if its platform availability better fits your workflow.

PIX4Dcatch is worth considering for Android or iOS capture, with a free Discovery license covering LiDAR 3D capture, GPS georeferencing, point measurement, and GCP creation; its Pro plan is 132.50 US.

Polycam offers Android, iOS, and web access, with a free plan that has limited space, object, and AI captures, GLTF exports, and public link sharing. It may suit users who prefer those platforms and can work within those limits.

RealityScan is an alternative for Android, iOS, Linux, or Windows users; its free plan covers individuals and small businesses under $1 million USD in revenue in the past 12 months, educational institutions, and students.

WebODM is free to install and use locally and offline, with Linux, macOS, self-hosted, web, Windows, and API access. Choose it if local offline operation is the priority.

KIRI Engine has Android, iOS, web, and API access; its free Basic plan allows up to 150 photos, a maximum 2 GB per scan, unlimited scans, and free exports. That is a clearer fit for users who want a stated photo allowance and free exports.

OpenReco is another free option for Linux, macOS, and Windows.

3DF Zephyr is a Windows alternative whose free personal-use plan is limited to 50 photos or video frames, one GPU, and limited exports and editing, but includes a perpetual license.

Browse more options in Photogrammetry Software or AI 3D Scanning Software.

Verdict

Choose MicMac if you need a free, technically deep photogrammetry suite with control over reconstruction quality, image sources, and coordinate systems. Its analytical tools and open intermediate results are the main reasons to pick it; the source-building demands and narrow AperiCloud format support are the main reasons to look elsewhere. For users who want a guided, low-friction capture workflow, a more packaged alternative is the better choice.

	MagiScan	MicMac
Free plan	Yes	Yes
Free trial	No	No
Paid from	Free	Free
Open source	No	No
Platforms	Android, iOS, Linux, macOS, Windows	Linux, macOS, Windows
Free plan	No	Yes
Capture input	both	—
Mobile platforms	both	—
Export formats	OBJ, STL, FBX, PLY, USDZ, GLB, GLTF	—

MagiScan vs MicMac

MagiScan

MicMac