Eigen alternatives and similar libraries

Based on the "Math" category.
Alternatively, view Eigen alternatives based on common mentions on social networks and blogs.

GLM

9.1 0.0 L1 Eigen VS GLM

OpenGL Mathematics (GLM)
OpenBLAS

8.6 9.5 Eigen VS OpenBLAS

OpenBLAS is an optimized BLAS library based on GotoBLAS2 1.13 BSD version.

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QuantLib

8.5 9.6 L1 Eigen VS QuantLib

The QuantLib C++ library
CGal

8.3 9.9 L1 Eigen VS CGal

The public CGAL repository, see the README below
ceres-solver

7.9 0.0 L1 Eigen VS ceres-solver

A large scale non-linear optimization library
TinyExpr

6.0 0.0 L4 Eigen VS TinyExpr

tiny recursive descent expression parser, compiler, and evaluation engine for math expressions
Vc

5.9 0.0 L1 Eigen VS Vc

SIMD Vector Classes for C++
MIRACL

5.1 0.0 L1 Eigen VS MIRACL

MIRACL Cryptographic SDK: Multiprecision Integer and Rational Arithmetic Cryptographic Library is a C software library that is widely regarded by developers as the gold standard open source SDK for elliptic curve cryptography (ECC).
linmath.h

5.1 0.0 Eigen VS linmath.h

a lean linear math library, aimed at graphics programming. Supports vec3, vec4, mat4x4 and quaternions
NT2

5.0 5.6 Eigen VS NT2

A SIMD-optimized numerical template library that provides an interface with MATLAB-like syntax. [Boost]
ExprTK

5.0 0.0 L1 Eigen VS ExprTK

C++ Mathematical Expression Parsing And Evaluation Library https://www.partow.net/programming/exprtk/index.html
LibTomMath

4.9 7.9 L2 Eigen VS LibTomMath

LibTomMath is a free open source portable number theoretic multiple-precision integer library written entirely in C.
Klein

4.5 0.0 Eigen VS Klein

P(R*_{3, 0, 1}) specialized SIMD Geometric Algebra Library
muparser

4.0 0.0 L1 Eigen VS muparser

muparser is a fast math parser library for C/C++ with (optional) OpenMP support.
HLSL++

3.7 0.0 Eigen VS HLSL++

Math library using hlsl syntax with SSE/NEON support
GMTL

3.7 0.0 L1 Eigen VS GMTL

Generic Math Template Library (forked from http://ggt.sourceforge.net/)
Boost.Multiprecision

3.5 0.0 L1 Eigen VS Boost.Multiprecision

Boost.Multiprecision
Apophenia

3.2 0.0 L2 Eigen VS Apophenia

A C library for statistical and scientific computing
safe_numerics

3.2 0.0 Eigen VS safe_numerics

Replacements to standard numeric types which throw exceptions on errors
blaze

3.1 - Eigen VS blaze

high-performance C++ math library for dense and sparse arithmetic. [BSD]
Wykobi

3.0 0.0 Eigen VS Wykobi

Wykobi C++ Computational Geometry Library https://www.wykobi.com
Versor

1.8 0.0 Eigen VS Versor

[older version] Versor 1.0 C++ library for conformal geometric algebra draw routines
metamath

1.6 0.0 Eigen VS metamath

Meta mathematics. Symbolic functions and derivatives.
Xerus

1.5 0.0 Eigen VS Xerus

A general purpose library for numerical calculations with higher order tensors, Tensor-Train Decompositions / Matrix Product States and other Tensor Networks
Mission : Impossible (AutoDiff)

1.4 0.0 Eigen VS Mission : Impossible (AutoDiff)

A concise C++17 implementation of automatic differentiation (operator overloading)
SLIMCPP

1.4 0.0 Eigen VS SLIMCPP

Simple Long Integer Math for C++. Lightweight cross-platform header-only library what implements big integer arithmetic in С++17.
ceval

1.2 0.0 Eigen VS ceval

A C/C++ library for parsing and evaluation of arithmetic expressions.
macadam

0.9 0.0 Eigen VS macadam

Numerical library. Complete BLAS. Hybrid cpp98/cpp11 c99/c11
Armadillo

- Eigen VS Armadillo

A high quality C++ linear algebra library, aiming towards a good balance between speed and ease of use. The syntax (API) is deliberately similar to Matlab. [MPL2]
GMP

- Eigen VS GMP

A C/C++ library for arbitrary precision arithmetic, operating on signed integers, rational numbers, and floating-point numbers. [LGPL3 & GPL2]