Code Quality Rank: L3
Programming language: C
License: GNU General Public License v3.0 or later
Tags: Networking    
Latest version: v6.18

Mongoose alternatives and similar libraries

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Mongoose - Embedded Web Server / Embedded Networking Library

License: GPLv2 Build Status Code Coverage Fuzzing Status

Mongoose is a networking library for C/C++. It implements event-driven non-blocking APIs for TCP, UDP, HTTP, WebSocket, MQTT. It has been designed for connecting devices and bringing them online. On the market since 2004, used by vast number of open source and commercial products - it even runs on the International Space Station! Mongoose makes embedded network programming fast, robust, and easy.

Source code and documentation:

Are you a company working on a connected product or software? We can offer you assistance to guarantee your integration success. Book a free call with our experienced engineer for the initial integration development session.

Why Mongoose?

Mongoose provides a high level of assurance in terms of reliability and security:

  • Reliable and tested with time: over 16 years of track record.
  • Proven track record: deployed to tens of millions devices in production environments worldwide.
  • Trusted by hundreds of companies big and small: Bosch, Siemens, Samsung, HP, Dell, Google, Intel, Qualcomm, Caterpillar and many others.
  • Secure: the fact that the Mongoose Library is used by NASA aboard the International Space Station is the best confirmation to it.

Mongoose is used to implement

Mongoose is embedded in the software, machinery, devices, appliances to implement:

  • Web UI interface on devices
  • RESTful API services
  • Telemetry data exchange
  • Remote control for a product
  • Remote software updates
  • Remote monitoring The Mongoose ecosystem is very dynamic and ever increasing.

Connectivity is vital for software and embedded devices, but there are many pitfalls to consider when embedding a web server. This white paper breaks down on the top 9 things to avoid when embedding a web server.

Case Studies and Testimonials:


  • "Performance and stability of Mongoose Web Server are very good! We had no noticeable issues whatsoever!" - Linus Nuber, Software Architect, Schenck Process Europe GmbH
  • "We could not have dreamed of any better results and are very happy with the decision we made to implement Mongoose Embedded Web Server into our product." - Bram Mariën, Product Manager, Mabo Engineering & Automation NV
  • "We looked through many different libraries and solutions, but with the Mongoose Web Server Library just within a couple of hours, we built a proof of concept. Everything just works, we faced no problems with Mongoose." Samuel Remy, Project Engineer, HAENNI Instruments Inc.

See Testimonials

Case Studies:

  • Schenck Process integrated Mongoose Web Server Library in the “DISOMAT Tersus” weighing terminal, to provide SSL-enabled web interface.
  • HAENNI Instruments used Mongoose to enable communication with the "HAENNI Wheel Load Scales" - a low weight, robust, long lasting wheel load scales.
  • EFR GmbH uses Mongoose to enable connectivity for the Secure Smart Grid Hub - a highly secure smart meter communication gateway.

See Case Studies

Looking for a pre-compiled Mongoose web server Windows or Mac binary?

Looking for a complete IoT solution? Check out

  • VCON - Arduino compatible MCU modules with built-in firmware OTA updates
  • Mongoose OS - open source embedded operating system for low-power connected microcontrollers. Secure, designed for commercial Internet of Things products



  • Cross-platform: works on Linux/UNIX, MacOS, Windows, Android, FreeRTOS, etc
  • Supported embedded architectures: ESP32, ESP8266, TI, NRF52, STM32, PIC32, NXP, and more
  • Builtin protocols: plain TCP/UDP, HTTP, MQTT, Websocket
  • SSL/TLS support: mbedTLS, OpenSSL or custom (via API)
  • Asynchronous DNS resolver
  • Tiny static and run-time footprint
  • Source code is both ISO C and ISO C++ compliant
  • Very easy to integrate: just copy mongoose.c and mongoose.h files to your build tree


Mongoose is released under Commercial and GNU GPL v.2 open source licenses.

Commercial Projects: Contact us for commercial license.

Dashboard Example

Mongoose is often used to implement device dashboards and real-time data exchange over Websocket. Here is a dashboard example that illustrates the functionality:

Developing a new product? Contact us today to discuss how Mongoose can help.


Contributions are welcome! Please follow the guidelines below:

  • Sign Cesanta CLA and send GitHub pull request
  • When making pull requests, please make sure that it has only one commit, and imlements/fixes only one piece of functionality

*Note that all licence references and agreements mentioned in the Mongoose README section above are relevant to that project's source code only.