Google Optimization Tools

Google Optimization Tools (OR-Tools) is a fast and portable software suite for solving combinatorial optimization problems. The suite contains:

• A constraint programming solver.
• A simple and unified interface to several linear programming and mixed integer programming solvers, including CBC, CLP, GLOP, GLPK, Gurobi, CPLEX, and SCIP.
• Graph algorithms (shortest paths, min cost flow, max flow, linear sum assignment).
• Algorithms for the Traveling Salesman Problem and Vehicle Routing Problem.
• Bin packing and knapsack algorithms.

Google created OR-Tools in C++, but you can also use it with Python, C#, or Java.

For a complete list of OR-Tools downloads for Linux, Windows, and Mac OS X, see the OR-Tools Downloads page.

The OR-Tools suite is:

• Open source and free. Examples and source code are freely available for download under Apache License 2.0.
• Actively maintained. We release improvements several times per month.
• Documented. In addition to this site, there are many examples available in C++, Python, Java, and C#.
• Portable. The code conforms strictly to Google C++ coding style. Everything is coded in C++ and available through SWIG for Python, Java, and .NET (using Mono on non-Windows platforms). You can compile OR-Tools on Linux, Mac OS X, and Windows (with Visual Studio).
• Efficient. We use it internally at Google, where speed and memory consumption are critical.
• User-friendly. We try to make our code as easy to use as possible (especially in Python and C#).
• Well tested. We use it in mission-critical applications at Google, as do many external developers.

If all you need is mixed integer linear optimization, you have a couple of options other than downloading OR-Tools:

• Use our mixed integer linear optimizer via Google Sheets.
• Use our mixed integer linear optimizer via Google Apps Script.

On this site you'll find:

• A general introduction to combinatorial optimization.
• Installation instructions for OR-Tools.
• Tutorials on running OR-Tools programs and using OR-Tools to solve optimization problems.
• Code examples in the navigation bar for particular problems you might want to solve.

If you just want to play Sudoku, fire up Google Sheets and install our Sudoku add-on.