Many French people do not use these tools, which can save them several hundred euros, notes a study by the start-up Climb. Each year, "the forgetting of tax loopholes makes each household lose up to 699 euros," Aldric Emié recently pointed out on Linkedin.

Climb offers its users to use its algorithms to "look for the best solutions to optimize [their] personal finances" The company thus makes an enticing promise: to discover "how to make [its] money grow"