GMP alternatives and similar libraries

Based on the "Math" category.

GLM

9.1 9.0 L1 GMP VS GLM

OpenGL Mathematics (GLM)
OpenBLAS

8.6 9.8 GMP VS OpenBLAS

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

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QuantLib

8.6 9.8 L1 GMP VS QuantLib

The QuantLib C++ library
CGal

8.4 9.9 L1 GMP VS CGal

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

8.0 8.3 L1 GMP VS ceres-solver

A large scale non-linear optimization library
Eigen

7.1 - GMP VS Eigen

A high-level C++ library of template headers for linear algebra, matrix and vector operations, numerical solvers and related algorithms. [MPL2]
TinyExpr

6.2 2.9 L4 GMP VS TinyExpr

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

5.9 6.1 L1 GMP VS Vc

SIMD Vector Classes for C++
linmath.h

5.2 0.0 GMP VS linmath.h

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

5.1 0.0 L1 GMP 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).
ExprTK

5.1 0.0 L1 GMP VS ExprTK

C++ Mathematical Expression Parsing And Evaluation Library https://www.partow.net/programming/exprtk/index.html
NT2

5.0 5.6 GMP VS NT2

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

5.0 6.8 L2 GMP VS LibTomMath

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

4.6 0.0 GMP VS Klein

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

4.1 6.7 L1 GMP VS muparser

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

3.7 0.0 L1 GMP VS GMTL

Generic Math Template Library (forked from http://ggt.sourceforge.net/)
HLSL++

3.7 7.7 GMP VS HLSL++

Math library using hlsl syntax with SSE/NEON support
Boost.Multiprecision

3.5 8.1 L1 GMP VS Boost.Multiprecision

Boost.Multiprecision
safe_numerics

3.2 0.0 GMP VS safe_numerics

Replacements to standard numeric types which throw exceptions on errors
Apophenia

3.1 0.0 L2 GMP VS Apophenia

A C library for statistical and scientific computing
blaze

3.1 - GMP VS blaze

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

3.0 0.0 GMP VS Wykobi

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

1.7 0.0 GMP VS Versor

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

1.6 0.0 GMP VS metamath

Meta mathematics. Symbolic functions and derivatives.
SLIMCPP

1.5 2.9 GMP VS SLIMCPP

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

1.5 0.0 GMP 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)

1.3 0.0 GMP VS Mission : Impossible (AutoDiff)

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

1.2 0.0 GMP VS ceval

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

0.9 0.0 GMP VS macadam

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

- GMP 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]