Apertus is described as 'As a fully open language model, Apertus allows researchers, professionals and enthusiasts to build upon the model and adapt it to their specific needs, as well as to inspect any part of the training process' and is a AI Chatbot in the ai tools & services category. There are more than 100 alternatives to Apertus for a variety of platforms, including Web-based, Mac, Windows, Linux and Android apps. The best Apertus alternative is ChatGPT, which is free. Other great apps like Apertus are Lumo by Proton, DeepSeek, Mistral Vibe and Google Gemini.