Head-to-Head Comparison · Alternative to Grok · 👥 community
Grok vs Proton Lumo
AI chat assistant from Proton that stores conversations with zero-access encryption, never logs chats, and never uses your data to train models. Here is how Proton Lumo ($0/mo open source) stacks up against Grok ($15/mo) across cost, hosting, data privacy, and real-world trade-offs.
Proton Lumo is a verified Open Source-licensed open-source replacement for Grok. Switching from Grok ($15/mo) saves $180/yr per solo seat, or $900/yr for a 5-person team. Deployment: Runs on Local.
The catch: Community-driven open source project without dedicated enterprise SLAs.
Proton Lumo
$0.00/mo · Open Source
Grok vs Proton Lumo Specifications
facts verified 2026-11-07
| Dimension | Grok (Paid) | Proton Lumo (Replacement) |
|---|---|---|
| Monthly Price | $15 / mo | $0 / mo |
| 1-Year Cost (1 seat) | $180 / yr | $0 / yr (Save $180) |
| 1-Year Cost (5 seats) | $900 / yr | $0 / yr (Save $900) |
| 1-Year Cost (10 seats) | $1,800 / yr | $0 / yr (Save $1,800) |
| Source & License | Proprietary SaaS | open source Open Source |
| Where It Runs | Vendor Cloud | Local (on your machine) |
| Platforms | Web / Cloud | desktopcross-platformone-click install |
| GitHub Stars | — | ★ 5.7k (active nov 2026) |
Deep Dive: Switching from Grok to Proton Lumo
Trade-offs, installation & data architecture
What you trade away
Community-driven open source project without dedicated enterprise SLAs.
How to deploy Proton Lumo
Clone https://github.com/ProtonMail/WebClients/tree/main/applications/lumo or deploy with Docker Compose
What it takes to run
Download the native package or installer for your operating system.
Where your data lives
All application data lives locally on your own machine.
Why fork Proton Lumo instead of vibe-coding a Grok clone?
Instead of paying recurring SaaS fees for Grok or rebuilding it from scratch, deploy one of the 6 battle-tested open-source alternatives like Proton Lumo.
Grok vs Proton Lumo FAQ
Is Proton Lumo a good free alternative to Grok?+
Yes. Proton Lumo is a verified open-source (Open Source) replacement for Grok. AI chat assistant from Proton that stores conversations with zero-access encryption, never logs chats, and never uses your data to train models.
What is the catch when switching from Grok to Proton Lumo?+
Community-driven open source project without dedicated enterprise SLAs.
How much do you save switching from Grok to Proton Lumo?+
Grok costs $15/mo ($180/yr) per seat, whereas Proton Lumo is $0/mo. Switching saves $180/yr for a solo user, $900/yr for a 5-person team, and $1,800/yr for a 10-person team.
How do I install or self-host Proton Lumo instead of Grok?+
Install: Clone https://github.com/ProtonMail/WebClients/tree/main/applications/lumo or deploy with Docker Compose. Setup: Download the native package or installer for your operating system.
