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DeepSeek vs Lumo

Features, pricing, ratings, and pros and cons, side by side.

Verdict

DeepSeek and Lumo are both AI Assistants tools. DeepSeek scores higher in FinderAtlas's editorial review (8.8 vs 7.6 out of 10). Both have a free plan or trial. Only DeepSeek is available on Windows and macOS and offers an API.

Best overall

DeepSeek

  • Software developers
  • Researchers and analysts
  • Students
  • AI engineers

Choose DeepSeek if

  • You want a tool built for Low-cost API integration.
  • Web chat and mobile apps are free.
  • API output costs from $0.60 per 1M tokens (Flash, off-peak), well below most frontier providers.

Choose Lumo if

  • You want a tool built for everyday AI chat, web-assisted questions, document and image work without conversation logging or training on user data.
  • Zero-access encryption on saved chats, with a stated no-logging policy.
  • Open-source code and open-source models that can be inspected.
Best for beginners
DeepSeek
Best for business
Lumo

Features

18 features compared.

  • V4 model family
    DeepSeek
    Available
    Lumo
    Not available
  • Thinking mode
    DeepSeek
    Available
    Lumo
    Not available
  • Open weights
    DeepSeek
    Available
    Lumo
    Not available
  • OpenAI and Anthropic compatible API
    DeepSeek
    Available
    Lumo
    Not available
  • Tool calls and JSON output
    DeepSeek
    Available
    Lumo
    Not available
  • Search and Fetch APIs
    DeepSeek
    Available
    Lumo
    Not available
  • Agent tool integrations
    DeepSeek
    Available
    Lumo
    Not available
  • DeepSeek Harness
    DeepSeek
    Available
    Lumo
    Not available
  • Vision on Flash
    DeepSeek
    Available
    Lumo
    Not available
  • Zero-Access Encrypted Chats
    DeepSeek
    Not available
    Lumo
    Available
  • Open-Source Models
    DeepSeek
    Not available
    Lumo
    Available
  • Web Search
    DeepSeek
    Not available
    Lumo
    Available
  • Image Generation and Editing
    DeepSeek
    Not available
    Lumo
    Available
  • Projects
    DeepSeek
    Not available
    Lumo
    Available
  • Custom Lumos
    DeepSeek
    Not available
    Lumo
    Available
  • Proton Drive Integration
    DeepSeek
    Not available
    Lumo
    Available
  • Guest Mode
    DeepSeek
    Not available
    Lumo
    Available
  • Memory and Personalization
    DeepSeek
    Not available
    Lumo
    Available

Pricing

Plans as listed by each vendor. Check their sites for current prices.

  • Pricing model
    DeepSeek
    Freemium
    Lumo
    Freemium
  • Free plan
    DeepSeek
    Yes
    Lumo
    Yes
  • Starting price
    DeepSeek
    $0
    Lumo
    $0
  • Plans
    DeepSeek
    3 plans
    Lumo
    2 plans

DeepSeek plans

  • Chat and App

    Most popular

    $0

    Free access to DeepSeek models on web, iOS and Android

    • Web chat
    • iOS and Android apps
    • Thinking mode
    • Web search
    • File upload

  • API: deepseek-flash

    $0.15/1M input tokens

    Pay as you go; $0.15 cache-miss input and $0.60 output per 1M tokens off-peak, double at peak

    • 1M context
    • 384K max output
    • Vision
    • Tool calls
    • JSON output

  • API: deepseek-v4-pro

    $0.66/1M input tokens

    Pay as you go; $0.66 cache-miss input and $1.98 output per 1M tokens off-peak, double at peak

    • 1M context
    • 384K max output
    • Tool calls
    • JSON output

Lumo plans

  • Lumo Free

    $0

    Limited free access, no credit card required

    • Limited Max model usage
    • limited messages and chat history
    • limited image generations
    • 1 Project

  • Lumo Plus

    Most popular

    $12.99/month

    Individuals who want higher limits

    • More Max model usage
    • more messages and chat history
    • more image generations
    • unlimited Projects
    • unlimited Custom Lumos

Our ratings

Scored out of 10 by the Finder Atlas editorial team. Last reviewed October 2026.

DeepSeek
8.8overall
Lumo
7.6overall

DeepSeek leads in 0 categories and Lumo in 1.

  • Reasoning & Logic

    DeepSeek
    8.8
    Lumo
    Not rated

  • Coding & Syntax

    DeepSeek
    8.7
    Lumo
    Not rated

  • Cost Efficiency

    DeepSeek
    9.6
    Lumo
    Not rated

  • Long Context

    DeepSeek
    8.8
    Lumo
    Not rated

  • Ease of Use

    Lumo leads by 0.5
    DeepSeek
    8.0
    Lumo
    8.5

  • Feature Depth

    DeepSeek
    Not rated
    Lumo
    7.0

  • Value for Money

    DeepSeek
    Not rated
    Lumo
    7.5

  • Performance & Speed

    DeepSeek
    Not rated
    Lumo
    7.2

  • Documentation & Support

    DeepSeek
    Not rated
    Lumo
    7.8

Scores weigh documented features, plan value, platform coverage, integrations and user feedback. A missing score means we have not rated that area yet.

Pros and cons

DeepSeek

Pros

  • Web chat and mobile apps are free
  • API output costs from $0.60 per 1M tokens (Flash, off-peak), well below most frontier providers
  • Open weights for V4 and earlier models on Hugging Face
  • 1M-token context and 384K max output on both API models
  • API works with both OpenAI and Anthropic SDKs and several coding agents

Cons

  • Peak-hour API rates are double the off-peak rates on weekday mornings UTC
  • deepseek-v4-pro does not support vision input
  • No image generation
  • Data is processed by a company based in China, which some organizations cannot accept

Lumo

Pros

  • Zero-access encryption on saved chats, with a stated no-logging policy.
  • Open-source code and open-source models that can be inspected.
  • Permanent free tier with guest access and no credit card.
  • Web, iOS and Android apps.
  • Run by Proton AG, a Swiss company, and stated to comply with GDPR.

Cons

  • Free chat history is kept for only 7 days.
  • Uses open-source models rather than the proprietary frontier models of larger rivals.
  • No desktop app or public API found.
  • Lumo Plus limits are described only as "more" than Free, not as numbers, and the plan costs $12.99/month ($9.99/month billed annually).

Platforms

  • Web
    DeepSeek
    Supported
    Lumo
    Supported
  • Windows
    DeepSeek
    Supported
    Lumo
    Not supported
  • macOS
    DeepSeek
    Supported
    Lumo
    Not supported
  • iOS
    DeepSeek
    Supported
    Lumo
    Supported
  • Android
    DeepSeek
    Supported
    Lumo
    Supported
  • API
    DeepSeek
    Supported
    Lumo
    Not supported
  • Browser Extension
    DeepSeek
    Not supported
    Lumo
    Not supported

Integrations

DeepSeek

6 integrations
  • OpenAI SDK
  • Anthropic SDK
  • Claude Code
  • Codex
  • OpenCode
  • Hugging Face

Lumo

1 integration
  • Proton Drive

Company

  • Company
    DeepSeek
    DeepSeek
    Lumo
    Proton AG
  • Founded
    DeepSeek
    2023
    Lumo
    2014
  • Headquarters
    DeepSeek
    Hangzhou, China
    Lumo
    Geneva, Switzerland
  • Listing
    DeepSeek
    Claimed
    Lumo
    Claimed

Frequently asked questions

Is DeepSeek better than Lumo?

It depends on your workflow. DeepSeek is built for Low-cost API integration. Lumo is built for everyday AI chat, web-assisted questions, document and image work without conversation logging or training on user data.

What are the key feature differences between DeepSeek and Lumo?

DeepSeek: Free AI chat app and low-cost API running DeepSeek's open-weights V4 models. Lumo: Privacy-first AI assistant from Proton with zero-access encrypted chats and no logging.

Does DeepSeek or Lumo have a free plan?

Yes, both do. DeepSeek is freemium and Lumo is freemium, and each has a free plan or trial.

Which is cheaper, DeepSeek or Lumo?

Both can be used for free. Paid plans differ in limits and features, so compare the tiers in the pricing table above.