Among the services we read, Euria (Infomaniak) and Vibe, formerly Mistral AI's Le Chat, have a free plan in October 2026. For Ecosia AI we found no price displayed; its launch blog post presents Ecosia as free. GreenPT is a paid service, from €4.50 per month after a 14-day trial. What these services publish does not allow their footprints to be compared: among the 4, the only public figure per answer we found is Mistral AI's.
Read the source article: Eco-friendly AI chatbot: how to choose one in 2026