ChatGPT vs Lumo
A side-by-side comparison of ChatGPT and Lumo, two Assistant tools, drawn from Ignaite's continuously-verified listings.
Compared from listings verified as of
At a glance
| Attribute | ChatGPT | Lumo |
|---|---|---|
| Category | Assistant | Assistant |
| Pricing | FREEMIUM | FREEMIUM |
| License (differs) | Proprietary | Open core |
| Deployment | Cloud | Cloud |
| Platforms (differs) | Web, iOS, Android, macOS, Windows | Web, iOS, Android |
| Model support (differs) | Single model (proprietary) | Multi-model |
| Vendor (differs) | OpenAI | Proton |
| Capabilities (differs) |
|
|
The honest brief
ChatGPT
The app that mainstreamed generative AI — its custom-GPT store turned a chatbot into a third-party app platform.
- Largest user base and ecosystem
- Custom GPT store and tooling
- Strong multimodal: voice, vision, web
- Frequent frontier-model updates
- OpenAI models only
- Best features gated to paid tiers
- Usage limits on advanced models
Lumo
A genuinely private chatbot — zero-access-encrypted, EU-hosted, with no logging or training on your data — from the maker of Proton Mail.
- Decrypts only on your device
- Open-source app and underlying models
- No logs; data not used for training
- Free tier, no account required
- Open models lag the top frontier LLMs
- No third-party model choice
- Fewer integrations than big assistants
When to pick which
ChatGPT leans on Web research agent as a headline capability; Lumo treats it as secondary.
- Web research agent (primary capability)
They also differ on:
- License
- Proprietary · Open core
- Platforms
- Web, iOS, Android, macOS, Windows · Web, iOS, Android
- Model support
- Single model (proprietary) · Multi-model
Their capability lists differ in recorded depth — compare the full lists above before deciding.