Gestioip is described as 'GestióIP is an automated, Web based IP address management (IPAM) software. It features powerful network discovery functions and offers search and filter functions for both networks and host, permitting Internet Search Engine equivalent expressions'. There are more than 10 alternatives to Gestioip, not only websites but also apps for Linux, Self-Hosted solutions, Windows and Mac. The best alternative is NetBox, which is both free and Open Source. Other great sites and apps similar to Gestioip are phpIPAM (Free, Open Source), TeemIP (Free, Open Source), Simple IP Config (Free, Open Source) and Microsoft IP Address Management Server (Paid).
NetBox is an open source web application designed to help manage and document computer networks. Initially conceived by an engineering team at DigitalOcean, it was developed specifically to address the needs of network and infrastructure engineers.
phpipam is an open-source web IP address management application (IPAM). Its goal is to provide light, modern and useful IP address management. It is php-based application with MySQL database backend, using jQuery libraries, ajax and some HTML5/CSS3 features.
TeemIP is an open source, web based DDI (DHCP, DNS, and IP Address Management (IPAM)) tool that provides comprehensive IP management capabilities with IP discovery, to manage VLANs, WAN links, AS numbers, VRFs, DNS domains, DHCP management, DC visualization and more.
IP Address Management (IPAM) in Windows Server® 2012 is an integrated suite of tools to enable end-to-end planning, deploying, managing and monitoring of your IP address infrastructure, with a rich user experience.
OpenNetAdmin provides a database managed inventory of your IP network. Each subnet, host, and IP can be tracked via a centralized AJAX enabled web interface that can help reduce tracking errors. A full CLI interface is available as well to use for scripting and bulk work.