30 open-source projects similar to mbed-tls/mbedtls, ranked by shared indexed features. Tags may describe platforms or build tools rather than the same primary purpose. Check each project’s use case, license, and deployment requirements before treating it as a replacement.
Mbed TLS is an open-source TLS and DTLS library with a small footprint, designed for embedded systems and IoT devices. It provides a portable cryptographic library that includes symmetric ciphers, hashing, and public-key cryptography, along with a reference implementation of the PSA Cryptography API for standardized cryptographic operations across platforms. The library also offers X.509 certificate management for parsing, validating, and managing certificate chains in secure communications. The library is built around a platform abstraction layer that decouples it from OS-specific services t
Forge is a JavaScript cryptography library providing a comprehensive set of tools for symmetric and asymmetric encryption, hashing, and digital signatures. It includes a full Transport Layer Security implementation for establishing secure network connections and managing encrypted traffic. The project implements a wide array of public key infrastructure tools, including X.509 certificate management, the generation of certificate signing requests, and the validation of certificate chains. It provides a PKCS cryptographic toolkit for handling secure archives and signed messages, alongside suppo
GmSSL is an open-source cryptographic library that implements the Chinese national cryptographic standards SM2, SM3, SM4, SM9, and ZUC as a unified algorithm suite. It provides a comprehensive set of cryptographic primitives including symmetric and asymmetric encryption, digital signatures, hashing, and key exchange, all built around these national standards for government and enterprise security applications. The library distinguishes itself through several integration capabilities. It includes an OpenSSL compatibility layer that maps GmSSL functions to OpenSSL API calls, enabling drop-in re
edk2 is a development project for creating system firmware that complies with the UEFI specification. It provides the necessary infrastructure to initialize hardware platforms and boot operating systems across multiple CPU architectures. The project utilizes a modular firmware architecture that decouples high-level management protocols from physical transport layers. It implements critical security features, including a measured boot chain, cryptographic primitives for image authentication, and support for Trusted Platform Module hardware and software implementations. Its capability surface
This project is a Python cryptography library that provides a collection of cryptographic primitives and high-level recipes for implementing secure encryption and authentication. It functions as a symmetric encryption toolkit and a cryptographic hash provider, offering both a low-level cryptographic interface for building custom protocols and high-level tools for securing data. The library covers a broad range of security capabilities, including symmetric data encryption, the derivation of cryptographic keys from passwords or secret values, and data integrity verification through the generati
Libsodium is a portable, C-based cryptographic library that provides a collection of modern primitives for encryption, decryption, digital signatures, password hashing, and secure key exchange. It is designed to facilitate secure communication and data integrity across diverse hardware architectures and operating systems. The library distinguishes itself by utilizing constant-time primitive execution to prevent side-channel attacks and employing memory-hard algorithms to increase the difficulty of brute-force password attacks. It abstracts complex mathematical operations into simplified inter
phpseclib is a pure-PHP cryptographic library that provides a comprehensive suite of cryptographic operations entirely without requiring compiled C extensions. At its core, it implements arbitrary-precision integer arithmetic for big-number math, ASN.1 DER encoding and decoding for working with cryptographic data structures, and a full set of pure-PHP cryptographic primitives. The library is designed to operate on PHP 5.6 and above, automatically detecting and using native extensions like GMP or BCMath when available, but falling back to its own pure-PHP implementations when they are not. The
s2n is a C-based security library and TLS protocol implementation that serves as a secure network transport layer. It provides a modular cryptographic backend interface to encrypt data streams, manage handshakes, and handle mutual authentication between peers. The project focuses on post-quantum cryptography, integrating quantum-resistant key exchange and digital signatures to protect connections against future computing threats. It distinguishes itself through security hardening measures, such as memory-locked secret storage to prevent keys from being swapped to disk and timing-attack mitiga
This project is a cross-platform library designed for desktop application development, providing a unified interface for window management, input handling, and hardware-accelerated graphics. It serves as a foundational framework that abstracts platform-specific windowing protocols and graphics APIs, enabling developers to create interactive software that functions consistently across Windows, macOS, and Linux. The library distinguishes itself by providing deep integration with low-level graphics APIs, specifically OpenGL and Vulkan. It manages the complexities of graphics context initializati
F Prime is a component-based framework designed for the development and deployment of embedded and spaceflight software. It provides a modular architecture that decouples software logic from communication interfaces, allowing developers to define system structures through a domain-specific modeling language. This model-based approach enables automated code generation, ensuring consistency across complex system topologies while maintaining strict interface contracts between software modules. The framework distinguishes itself through its integrated build system and ground data operations suite
ICU is a C++ and C internationalization software library implementing global Unicode standards for multi-language text processing, collation, and locale-aware data formatting. It functions as a text processing toolkit for transforming, searching, and normalizing character strings across various scripts and language encodings, while handling character sets according to the Unicode Character Database. Operating system differences are hidden behind a consistent internal hardware layer that handles memory allocation and character encoding uniformly. The system passes strings through canonical de
The advisory database is a centralized repository and intelligence platform designed to aggregate, normalize, and track security vulnerability data across diverse open source software ecosystems. It functions as a unified source of truth for security advisories, providing machine-readable records that help developers and automated tools identify and manage threats within their software supply chains. The platform distinguishes itself by utilizing a version-controlled, git-based storage model that relies on pull-request-driven workflows for community curation and verification. By enforcing a s
Ring is a low-level cryptographic primitive library and security toolset designed for building portable, secure applications. It provides a collection of implementations for RSA, elliptic curve cryptography, and authenticated symmetric encryption. The project focuses on constant-time cryptography to prevent secret data from leaking through timing side-channel attacks. It utilizes a formal verification tool that generates arithmetic logic from templates, ensuring mathematical correctness and eliminating manual implementation errors. The library includes capabilities for producing cryptographi
SDL is a cross-platform development library that provides low-level access to audio, keyboard, mouse, joystick, and graphics hardware. It functions as a hardware abstraction layer, mapping diverse operating system interfaces into a unified set of functions to ensure consistent performance across different computing environments. The library serves as a foundation for multimedia and interactive application development by providing an integrated audio processing engine and a graphics rendering framework. It manages the complexities of hardware communication by normalizing raw input events and p
This project is a comprehensive security suite and knowledge base focused on the engineering and construction of trustworthy digital and physical systems. It provides a systematic framework for security engineering design, covering the establishment of high-assurance architectures and the implementation of security models that govern how a system achieves its safety goals. The project is distinguished by its focus on formal assurance and adversarial deterrence. It includes methodologies for creating security assurance cases and proofs to verify system trustworthiness, alongside economic and t
sjcl is a JavaScript cryptography library providing a collection of primitives for encryption, hashing, and encoding within a web browser. It functions as an AES symmetric encryption tool, a cryptographic hashing library, and a Base32 data encoder. The project provides implementations for the Advanced Encryption Standard to secure data through symmetric key encryption and decryption. It also enables the generation of fixed-length data fingerprints to verify information integrity and authenticity. The library covers a broader range of security capabilities, including client-side data hashing,
Crypto++ is a comprehensive C++ cryptographic library that implements a broad range of algorithms for symmetric and asymmetric encryption, hashing, and digital signatures. It is designed as a portable toolkit, usable across different operating systems without modification. The library distinguishes itself through its architecture: cryptographic parameters such as key size and mode are configured at compile time via C++ templates, eliminating runtime overhead. Algorithms are registered in a static factory for runtime lookup, while data processing follows a pipeline model of composable sources,
ExecuTorch is a lightweight C++ runtime for deploying PyTorch models on mobile, embedded, and edge hardware. It provides an ahead-of-time compilation pipeline that exports, quantizes, and lowers model graphs into compact serialized programs, then executes them through a minimal runtime with hardware acceleration and on-device large language model inference capabilities. The project distinguishes itself through a hardware accelerator delegate system that partitions model subgraphs and offloads computation to specialized backends including NPUs, GPUs, and DSPs from Apple, Arm, Intel, MediaTek,
libusb is a cross-platform user-space library that provides a consistent C API for discovering, configuring, and communicating with USB devices from applications. It abstracts operating-system-specific USB driver details behind a single interface that works on Linux, macOS, Windows, and other platforms, enabling developers to write portable USB code without platform-specific knowledge. The library supports both synchronous and asynchronous I/O models for USB transfers. Synchronous operations block the calling thread until a transfer completes, offering a straightforward sequential programming
JUCE is a comprehensive C++ audio framework and digital signal processing library used to build cross-platform audio applications, audio plug-ins, and high-performance user interfaces. It serves as a development kit for creating audio processors compatible with industry-standard plugin formats for digital audio workstations, as well as a tool for MIDI and Open Sound Control communication between musical hardware and software. The framework is distinguished by its ability to maintain a single codebase for native desktop and mobile applications across multiple operating systems. It provides a f
Rax is a React universal application framework and isomorphic JavaScript environment designed to render a single codebase across web, mobile, and mini-program platforms. It functions as a cross-platform component renderer that translates React components into platform-specific elements using a standardized driver specification. The framework utilizes a universal UI driver specification to decouple component logic from the underlying UI layer, allowing for standardized DOM manipulation and event handling across different execution environments. This architecture enables the integration of nati
WebClient is an encrypted productivity suite consisting of integrated web tools for secure email, calendar, drive, and password management. It serves as an end-to-end encrypted email client, a secure cloud storage interface, and a private calendar management application. The project includes specialized interfaces for a variety of secure services, including a web-based VPN controller, a secure cryptocurrency wallet interface, and an encrypted video conferencing client for real-time audio and video meetings. The suite covers broader capabilities for managing digital identities, organizing enc
jemalloc is a general purpose C memory allocator designed as a replacement for the standard library malloc and free functions. It is a multi-threaded allocation library that emphasizes fragmentation avoidance and scalable concurrency for high-performance applications. The project reduces lock contention by using multiple independent memory arenas and thread-local cache layers. It minimizes latency by offloading the reclamation of unused memory pages to asynchronous background threads and utilizes huge page metadata storage to reduce translation lookaside buffer misses. The system includes a
Nanopb is a lightweight C implementation of Protocol Buffers designed for resource-constrained systems and microcontrollers. It functions as both an embedded serialization library for encoding and decoding structured data and a code generator that transforms definition files into compact C source and header files. The project is distinguished by its focus on static memory allocation, using fixed maximum sizes for strings and arrays to avoid dynamic memory allocation and heap fragmentation. It employs a callback-based streaming mechanism to process messages or fields that exceed available phys
Mimalloc is a general purpose dynamic memory allocator for C and C++ designed to increase execution speed and reduce fragmentation. It functions as a scalable heap manager that replaces standard library allocation functions to improve performance and memory efficiency across applications. The project distinguishes itself as both a heap security hardener and a memory corruption detector. It employs randomized allocation, encrypted free lists, and sampled guard pages to mitigate heap exploits and identify buffer overflows or use-after-free errors during runtime. The allocator provides capabili
Compose Multiplatform is a declarative user interface framework that enables the development of native graphical interfaces across desktop, mobile, and web platforms using a single Kotlin codebase. It functions as a multiplatform library that allows developers to share both application logic and UI components while maintaining access to platform-specific features through abstraction layers. The framework utilizes a reactive state management system that automatically tracks data mutations to trigger granular interface updates. By employing a cross-platform rendering engine based on a hardware-
FlClash is a cross-platform proxy client designed to manage network traffic through configurable rules and system-level tunnel integration. It functions as a native system orchestrator, coordinating application lifecycle events and background services across desktop and mobile environments. The application utilizes a modular architecture that enables extensibility through local plugins and foreign function interfaces, allowing for direct interaction with native system libraries. It maintains security by isolating restricted administrative tasks within a privileged helper process, which valida
Bun is a high-performance runtime environment designed to execute JavaScript and TypeScript applications with minimal latency and high throughput. Built on a native core implemented in Zig, it provides a unified execution engine that leverages JavaScriptCore for efficient memory management and low-latency startup. The project functions as an all-in-one toolchain, integrating a native bundler, transpiler, package manager, and test runner into a single command-line interface. What distinguishes Bun is its focus on native system integration and developer productivity. It features a high-performa
c3c is the compiler for the C3 programming language, transforming source code into executable binaries, static libraries, or dynamic libraries using an LLVM backend. It implements a system based on result-based error handling, scoped memory pooling, and a semantic macro system. The compiler provides first-class support for hardware-backed SIMD vectors that map directly to processor instructions and enables runtime polymorphism through interface-based dynamic dispatch. The project covers a broad set of low-level capabilities, including manual and pooled memory management, inline assembly inte
Druid is a native user interface toolkit and 2D graphics engine for the Rust programming language. It functions as a retained-mode, data-driven framework for building graphical user interfaces that run across Linux, macOS, and web browsers via WebAssembly. The toolkit distinguishes itself through a data-first approach to UI design, utilizing lenses to isolate subsets of global application state and synchronize them with specific widgets. This allows the visual layout to update automatically when the underlying data model changes. Its capability surface includes a constraint-based box layout