Lumo vs Maple AI

Lumo

• People who want an assistant that cannot read or reuse their chats
• Proton users who already keep files in Proton Drive
• Trying a private assistant without creating an account

Maple AI

• People who want cloud-hosted models without exposing their chats
• Professionals working with confidential client or company material
• Developers routing coding tools through an encrypted API

Lumo

• The free plan limits Max model usage, messages, chat history, image generations and uploads, and allows 1 Project; Proton gives no exact numbers.
• The download menu lists iOS and Android apps and a web app; no desktop app is listed.
• Business use is sold separately, as Lumo Professional or as part of Proton Workspace.

Maple AI

• Only open-weight models are offered; proprietary models from OpenAI, Anthropic or Google are not part of the lineup.
• The Free plan leaves out web search, and uploads, voice recording and API access start at Pro for $20 per month.
• API usage is charged per million tokens at each model's rate, separately from the subscription.
• Maple Agent, the assistant with long-term memory, is in private beta behind a waitlist.

Lumo

Zero-access encrypted chats

Conversations are stored with zero-access encryption so that only you can read them; Proton says it cannot access them.

No training on your chats

Proton states that conversations are never used to train AI models, to target ads or to build a personal profile.

Web search

Built-in web search brings real-time information into answers. It is included in the free plan.

Files and Proton Drive

Link files and folders from Proton Drive to give Lumo context. The free plan uploads individual small files; Plus allows multiple large files.

Image generation

Turns a description into an image and lets you refine it through follow-up prompts.

Open-source code

Lumo's code is published as open source, which Proton says lets anyone verify that it is private and secure.

Maple AI

End-to-end encrypted chats

Messages are encrypted on the device with a per-account key and decrypted only inside a hardware-isolated enclave for inference. Maple says it cannot read them and does not train on them.

Open models inside enclaves

Open-weight models such as Kimi, GLM, DeepSeek, Gemma, Llama and OpenAI's GPT-OSS run on GPUs in trusted execution environments, so prompts are not passed to the labs that made them.

Public code and attestation

Client and server code are published on GitHub under the MIT license. Reproducible builds and a signed enclave attestation let anyone check what is running.

Private web search

A search agent queries the web anonymously through Brave's search API and brings current information into the chat. Web search is left out of the Free plan.

Projects, documents and voice

Chats can be grouped into projects and pinned. Pro adds image and document upload in the apps, plus voice recording, inside the same encrypted workspace.

Maple Proxy API

An OpenAI-compatible endpoint that verifies the enclave and encrypts requests from tools such as OpenCode and Goose. API usage is billed per million tokens, apart from the plan price.

Lumo

• Free$0

  Limited Max model usage, messages, chat history and image generations, with 1 Project. No credit card required.

• Lumo AI Plus$9.99

  per month, billed yearly ($119.88); $12.99 billed monthly

  More Max model usage, messages, chat history and image generations, unlimited Projects and Custom Lumos, with a 30-day money-back guarantee.

Maple AI

• Free$0

  End-to-end encrypted chat with basic AI features. Web search is not included.

• Pro$20

  per month

  All models including Kimi, GLM, DeepSeek and GPT-OSS, image and document upload in the apps, voice recording and API access.

• Team$30

  per user / month

  Everything in Pro with 2x more usage per member, chat credits pooled across the team and unified billing.

• Max$100

  per month

  Everything in Pro with 20x more usage, priority support and early access to features and models.

Lumo

• Annual discount

  23% off with yearly billing

  Proton's pricing page lists Lumo AI Plus at $9.99 a month when billed yearly ($119.88 every 12 months) against $12.99 billed monthly, labeled as 23% off.

Maple AI

No public discounts listed.