Lumo (Proton) vs Microsoft Copilot

A side-by-side comparison of Lumo (Proton) and Microsoft Copilot — pricing, free tiers, and who each tool is genuinely best for.

	Lumo (Proton)	Microsoft Copilot
Tagline	Privacy-first AI assistant from the makers of Proton Mail	Microsoft's AI assistant across Windows, Edge, and Microsoft 365
Category	AI Assistants & Chatbots	AI Assistants & Chatbots
Pricing	Free tier available; paid access tied to Proton plans (verify on site)	Free tier; Copilot Pro $20/mo; Microsoft 365 Copilot from $30/user/mo
Free tier
Best for	Existing Proton users who want an AI assistant that aligns with strong privacy and Swiss data protection standards	Enterprises and individuals heavily invested in Microsoft 365 who want AI inside Word, Excel, and Outlook.
Not for	Users seeking cutting-edge model performance or extensive third-party integrations outside the Proton ecosystem	Users outside the Microsoft ecosystem looking for a lightweight standalone chatbot.
Use cases	Private AI chat with no training data usage AI assistance integrated with Proton Mail or Drive Privacy-conscious research and drafting Secure AI for journalists or activists	Drafting in Word and Outlook Excel data analysis Meeting recaps in Teams Web search assistance PowerPoint generation
	Visit Lumo (Proton)	Visit Microsoft Copilot

Choose it if: Existing Proton users who want an AI assistant that aligns with strong privacy and Swiss data protection standards

Choose it if: Enterprises and individuals heavily invested in Microsoft 365 who want AI inside Word, Excel, and Outlook.