GnuPG alternatives and similar libraries

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

OpenSSL

9.8 9.9 L2 GnuPG VS OpenSSL

TLS/SSL and crypto library
libsodium

9.3 8.7 L3 GnuPG VS libsodium

A modern, portable, easy to use crypto library.

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mbedTLS

8.8 10.0 L2 GnuPG VS mbedTLS

An open source, portable, easy to use, readable and flexible TLS library, and reference implementation of the PSA Cryptography API. Releases are on a varying cadence, typically around 3 - 6 months between releases.
Crypto++

8.4 8.0 L1 GnuPG VS Crypto++

free C++ class library of cryptographic schemes
Tiny AES128 in C

8.3 0.0 L5 GnuPG VS Tiny AES128 in C

Small portable AES128/192/256 in C
s2n

8.1 9.4 L3 GnuPG VS s2n

An implementation of the TLS/SSL protocols
Botan

7.3 9.8 L1 GnuPG VS Botan

Cryptography Toolkit
LibTomCrypt

6.7 7.3 L3 GnuPG VS LibTomCrypt

LibTomCrypt is a fairly comprehensive, modular and portable cryptographic toolkit that provides developers with a vast array of well known published block ciphers, one-way hash functions, chaining modes, pseudo-random number generators, public key cryptography and a plethora of other routines.
Themis by Cossack Labs

6.2 5.9 L3 GnuPG VS Themis by Cossack Labs

Easy to use cryptographic framework for data protection: secure messaging with forward secrecy and secure data storage. Has unified APIs across 14 platforms.
LibreSSL

6.1 9.5 L4 GnuPG VS LibreSSL

LibreSSL Portable itself. This includes the build scaffold and compatibility layer that builds portable LibreSSL from the OpenBSD source code. Pull requests or patches sent to [email protected] are welcome.
Bcrypt

5.6 9.1 L3 GnuPG VS Bcrypt

Modern(-ish) password hashing for your software and your servers
libhydrogen

4.4 7.3 GnuPG VS libhydrogen

A lightweight, secure, easy-to-use crypto library suitable for constrained environments.
digestpp

3.0 3.3 GnuPG VS digestpp

C++11 header-only message digest library
retter

2.3 0.0 L3 GnuPG VS retter

A collection of hash functions, ciphers, tools, libraries, and materials related to cryptography & security. :closed_lock_with_key::closed_lock_with_key::closed_lock_with_key::closed_lock_with_key::closed_lock_with_key: (project was renamed, libchaos is main)
mbedcrypto

1.9 0.0 GnuPG VS mbedcrypto

a portable, small, easy to use and fast c++14 library for cryptography.
GnuTLS

1.1 0.0 L2 GnuPG VS GnuTLS

GnuTLS
Libgcrypt

- GnuPG VS Libgcrypt

A general purpose cryptographic library originally based on code from GnuPG. [LGPLv2.1+]
BeeCrypt

- GnuPG VS BeeCrypt

A portable and fast cryptography library. [LGPLv2.1+]
Nettle

- GnuPG VS Nettle

A low-level cryptographic library. [LGPL]