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Mongoose Web Server

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Plans

PlanBilled and limitsPrice
GPLv2 Open SourceGPLv2 terms; commercial products must release source under GPLv2Free
CommercialPermanent, royalty-free; bespoke pricing by project · One product, product family, company-wide, or custom coverage; yearly maintenance and support subscription is optional for some license typesOn request
EvaluationRequest an evaluation license to use with non-GPL software; commercialized projects require a commercial licenseOn request

As mongoose.ws lists them, read 8 Oct 2026. The maker's own page has the final word.

Facts from Mongoose Web Server's own pages

Dashboard tools
Mongoose Wizard lets users visually arrange dashboard controls, define a REST API, select target hardware, and generate an editable project. · mongoose.ws, 8 Oct 2026
Firmware updates
The library includes OTA firmware update workflows, and the maker describes signature verification and automatic rollback on its CRA page. · mongoose.ws, 8 Oct 2026
Founded
2004 · mongoose.ws, 28 Sept 2026
Headquarters
Dublin, Ireland · mongoose.ws, 28 Sept 2026
Integrations
Mongoose can work with existing network stacks such as lwIP, Zephyr, and NetX, or run with its own built-in TCP/IP stack. · mongoose.ws, 8 Oct 2026
Intended users
The maker describes Mongoose for developers building connected products and embedded device interfaces, including dashboards, REST APIs, telemetry, remote control, and software updates. · mongoose.ws, 8 Oct 2026
Licensing limit
Commercial products using GPLv2 must release their source under GPLv2 unless they obtain a commercial license. · mongoose.ws, 8 Oct 2026
Maker
Cesanta Software Ltd says it is headquartered in Dublin, Ireland, and was established in 2013 after Mongoose development began in 2004. · mongoose.ws, 8 Oct 2026
Platform support
The maker lists Linux/UNIX, macOS, Windows, Android, FreeRTOS, and embedded architectures including ESP32, NRF52, STM32, and NXP. · mongoose.ws, 8 Oct 2026
Protocols
It implements event-driven non-blocking APIs for TCP, UDP, HTTP, WebSocket, and MQTT. · mongoose.ws, 8 Oct 2026
Purpose
Mongoose is a two-file C/C++ networking library and embedded web server for connecting devices and building browser-based device dashboards. · mongoose.ws, 8 Oct 2026
Resource footprint
The maker says Mongoose runs on 8-bit MCUs with 6 KB RAM, and its built-in TLS uses about 50 KB flash and a few KB RAM per connection. · mongoose.ws, 8 Oct 2026
Security limits
The maker says Mongoose covers the networking layer for CRA work, while product application logic, hardware interfaces, and other process requirements remain the customer's responsibility. · mongoose.ws, 8 Oct 2026
Security process
Cesanta describes continuous integration testing, sanitizer tests, OSS-Fuzz scanning, vulnerability report coordination, and private patches for eligible commercial customers before public CVE disclosure. · mongoose.ws, 8 Oct 2026
Support
Commercial support provides direct engineering access; reports are acknowledged and classified within two working days, and critical issues are worked on immediately. · mongoose.ws, 8 Oct 2026

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