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Maps · head to head

SAGA GIS vs SolveSpace

SAGA GIS logo

SAGA GIS

Maps

Open source terrain and geoscientific analysis with no vendor and no support contract available

From
Free
Rated
-
Full reviewWebsite
S

SolveSpace

CAD

Open source parametric CAD with a constraint solver in a few megabytes

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: SAGA GIS there is no commercial support contract available from anyone, so a procurement process that requires a named supplier with a service level cannot be satisfied and the organisation carries the whole operational risk itself; SolveSpace the in-house geometry kernel fails on complex boolean operations and fillets, and the failure is sometimes silent bad geometry rather than an error message, so models must be checked before export or manufacture.
  • They diverge on capability: SAGA GIS covers Terrain morphometry, SolveSpace covers Constraint solver.
  • Prices and features above were last checked on 1 September 2026.

Where they differ

Only the attributes on which SAGA GIS and SolveSpace actually diverge.

Attributes where SAGA GIS and SolveSpace differ
AttributeSAGA GISSolveSpace
PlatformsWindows, Linux, macOSWindows, macOS, Linux
CategoryMapsCAD

Identical on both: starting price (Free), pricing model (Open source, no licence fee), free tier (Yes), user rating (Not yet rated).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in SAGA GIS

  • Terrain morphometry
  • Hydrological modelling
  • Geostatistics
  • Image analysis
  • Module library
  • QGIS integration
  • Python and R bindings

Only in SolveSpace

  • Constraint solver
  • Solid modelling
  • Assemblies
  • Export formats
  • Cross-platform
  • Small footprint

What people use each for

The jobs each tool is most often brought in to do.

SAGA GIS

  • A hydrologist deriving catchment boundaries and flow networks from a national elevation model at a resolution commercial tools slow down onnot SolveSpace
  • A soil science team producing interpolated property surfaces with documented geostatistical methods for a peer-reviewed papernot SolveSpace
  • A government environmental analyst who needs a terrain index that no commercial GIS implements and does not want to write it from scratchnot SolveSpace
  • A QGIS user who has hit the limits of the native toolbox and needs the SAGA algorithms already exposed in the processing frameworknot SolveSpace

SolveSpace

  • Designing 3D printed parts on a machine that cannot run mainstream CADnot SAGA GIS
  • Teaching constraint-based parametric modelling without buying licences for a classroomnot SAGA GIS
  • Checking that a mechanical linkage moves as intended before cutting metalnot SAGA GIS
  • Producing dimensionally accurate STEP or STL output from a small open source toolchainnot SAGA GIS

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

SAGA GIS

  • There is no commercial support contract available from anyone, so a procurement process that requires a named supplier with a service level cannot be satisfied and the organisation carries the whole operational risk itself
  • The project explicitly states that everyone working on it has another job and that answers may take a while, which means an urgent production failure has no escalation path
  • The interface is dated and inconsistent across modules, and cartographic output is poor, so most users treat it as an analysis engine and produce maps somewhere else
  • Documentation for many of the several hundred modules is a parameter list without explanation of method or expected input, so choosing the right algorithm often requires reading the source or a published paper
  • Development is concentrated in a small group, which creates real key-person risk: a change in the circumstances of a handful of maintainers would slow or stop releases, and there is no organisation obliged to continue them

SolveSpace

  • The in-house geometry kernel fails on complex boolean operations and fillets, and the failure is sometimes silent bad geometry rather than an error message, so models must be checked before export or manufacture.
  • There is no proper drawing and dimensioning workflow, so manufacturing documentation has to be produced in another application.
  • Development is volunteer-led and intermittent; long gaps between releases are normal and there is no support contract available at any price.
  • Assembly-level import of external CAD is very limited, so it does not fit a supply chain that exchanges native or assembly-level models with suppliers.
  • The interface follows its own conventions rather than mainstream CAD ones, so existing SolidWorks or Fusion users spend time unlearning habits for a tool with a lower ceiling.

Pricing, plan by plan

SAGA GIS

Free
  • SAGA GISFree
    • GNU General Public Licence
    • No licence fee and no usage limits
    • No commercial support contract exists

SolveSpace

Free
  • SolveSpaceFree
    • Full application under the GPL
    • No seat limit
    • Windows, macOS and Linux builds

Which should you pick?

Choose SAGA GIS if

  • You need terrain morphometry.
  • You want to start without paying.
  • You work on Windows, Linux, macOS.
  • You also want hydrological modelling.
SAGA GIS review

Choose SolveSpace if

  • You need constraint solver.
  • You want to start without paying.
  • You work on Windows, macOS, Linux.
  • You also want solid modelling.
SolveSpace review

Questions people ask

Is SAGA GIS or SolveSpace better?
Neither clearly leads. SAGA GIS starts at Free and SolveSpace at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, SAGA GIS or SolveSpace?
SAGA GIS starts at Free and SolveSpace at Free.
Does SAGA GIS or SolveSpace run on more platforms?
SAGA GIS runs on Windows, Linux, macOS. SolveSpace runs on Windows, macOS, Linux.
Can I use SAGA GIS for free?
Both have a free tier, so you can try either at no cost before committing.
What is SAGA GIS best used for?
SAGA GIS is most often used for a hydrologist deriving catchment boundaries and flow networks from a national elevation model at a resolution commercial tools slow down on, a soil science team producing interpolated property surfaces with documented geostatistical methods for a peer-reviewed paper, a government environmental analyst who needs a terrain index that no commercial gis implements and does not want to write it from scratch, a qgis user who has hit the limits of the native toolbox and needs the saga algorithms already exposed in the processing framework. Of those, a hydrologist deriving catchment boundaries and flow networks from a national elevation model at a resolution commercial tools slow down on and a soil science team producing interpolated property surfaces with documented geostatistical methods for a peer-reviewed paper are not what SolveSpace is typically brought in for.
What can SAGA GIS do that SolveSpace cannot?
SAGA GIS covers Terrain morphometry, Hydrological modelling, Geostatistics, Image analysis. SolveSpace covers Constraint solver, Solid modelling, Assemblies, Export formats.

Answered from the vendors’ own pages

SAGA GIS: Who maintains SAGA GIS?

A small international developer community, originating from physical geography departments at the universities of Göttingen and Hamburg. It is hosted on SourceForge and releases continue in the 9.x line.

SolveSpace: Is it really free for commercial work?

Yes. It is released under the GPL with no licence fee and no seat limit. Support is community only.

SAGA GIS: Can I buy support?

No. There is no vendor and no commercial support contract. The project itself states there is no hotline and no guaranteed support.

SolveSpace: Can it replace Fusion 360 or SolidWorks?

No. It handles parts and simple assemblies well. Complex geometry, drawings and supply chain interoperability are outside its range.

SAGA GIS: Do I need SAGA if I already run QGIS?

Often not, because many SAGA algorithms are available through the QGIS processing toolbox. Install SAGA directly when you need modules QGIS does not expose or want to script them independently.

SolveSpace: What hardware does it need?

Very little. It runs on old laptops and small Linux machines where mainstream CAD will not start.

SAGA GIS: What licence is it under?

The GNU General Public Licence, so you can modify and redistribute it under the same terms.

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