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DeepSeek vs Dia

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

Verdict

DeepSeek and Dia are both AI Assistants tools. DeepSeek scores higher in FinderAtlas's editorial review (8.8 vs 7.8 out of 10). Both have a free plan or trial. Only DeepSeek is available on Web, iOS and Android 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 Dia if

  • You want a tool built for asking questions across tabs and connected work apps, summarizing pages and meetings, and organizing many open tabs.
  • Free to download, with a $20 per month Pro plan rather than a mandatory subscription.
  • AI chat can use content from open tabs and connected work apps.
Best for beginners
DeepSeek
Best for business
Dia

Features

19 features compared.

  • V4 model family
    DeepSeek
    Available
    Dia
    Not available
  • Thinking mode
    DeepSeek
    Available
    Dia
    Not available
  • Open weights
    DeepSeek
    Available
    Dia
    Not available
  • OpenAI and Anthropic compatible API
    DeepSeek
    Available
    Dia
    Not available
  • Tool calls and JSON output
    DeepSeek
    Available
    Dia
    Not available
  • Search and Fetch APIs
    DeepSeek
    Available
    Dia
    Not available
  • Agent tool integrations
    DeepSeek
    Available
    Dia
    Not available
  • DeepSeek Harness
    DeepSeek
    Available
    Dia
    Not available
  • Vision on Flash
    DeepSeek
    Available
    Dia
    Not available
  • Chat with your tabs
    DeepSeek
    Not available
    Dia
    Available
  • Connected apps
    DeepSeek
    Not available
    Dia
    Available
  • Skills
    DeepSeek
    Not available
    Dia
    Available
  • Morning Brief
    DeepSeek
    Not available
    Dia
    Available
  • Decks and reports
    DeepSeek
    Not available
    Dia
    Available
  • Live Work
    DeepSeek
    Not available
    Dia
    Available
  • Splits and organized tabs
    DeepSeek
    Not available
    Dia
    Available
  • Profiles
    DeepSeek
    Not available
    Dia
    Available
  • Privacy controls
    DeepSeek
    Not available
    Dia
    Available
  • Dia for Work
    DeepSeek
    Not available
    Dia
    Available

Pricing

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

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

Dia plans

  • Free

    $0

    Free download with capped AI usage

    • Full browser
    • AI chat with tab context
    • Skills (limited)
    • Sync

  • Pro

    Most popular

    $20/month

    Individuals who use AI heavily

    • Expanded AI chat and Skills usage
    • fuller personalized memory

Our ratings

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

DeepSeek
8.8overall
Dia
7.8overall

DeepSeek leads in 0 categories and Dia in 1.

  • Reasoning & Logic

    DeepSeek
    8.8
    Dia
    Not rated

  • Coding & Syntax

    DeepSeek
    8.7
    Dia
    Not rated

  • Cost Efficiency

    DeepSeek
    9.6
    Dia
    Not rated

  • Long Context

    DeepSeek
    8.8
    Dia
    Not rated

  • Ease of Use

    Dia leads by 0.5
    DeepSeek
    8.0
    Dia
    8.5

  • Feature Depth

    DeepSeek
    Not rated
    Dia
    8.0

  • Value for Money

    DeepSeek
    Not rated
    Dia
    7.5

  • Performance & Speed

    DeepSeek
    Not rated
    Dia
    7.8

  • Documentation & Support

    DeepSeek
    Not rated
    Dia
    7.0

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

Dia

Pros

  • Free to download, with a $20 per month Pro plan rather than a mandatory subscription.
  • AI chat can use content from open tabs and connected work apps.
  • Frequent releases: Mac v1.52.0 and v1.53.0 shipped in October 2026.
  • Separate profiles keep work and personal tabs and AI context apart.
  • Dia for Work provides SAML SSO, MDM policies and a SOC 2 Type II examination.

Cons

  • Desktop only; no publicly released iOS or Android app.
  • Windows version is new (v1.0 on October 6, 2026) and trails the Mac version.
  • Free-tier AI usage limits are not published, and the site has no public pricing page.
  • Several workflow features depend on connected work apps and a work-focused setup.

Platforms

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

Integrations

DeepSeek

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

Dia

8 integrations
  • Google Workspace
  • Slack
  • Notion
  • Microsoft Teams
  • GitHub
  • Atlassian
  • Okta
  • Microsoft Entra ID

Company

  • Company
    DeepSeek
    DeepSeek
    Dia
    The Browser Company of New York
  • Founded
    DeepSeek
    2023
    Dia
    2019
  • Headquarters
    DeepSeek
    Hangzhou, China
    Dia
    New York, NY
  • Listing
    DeepSeek
    Claimed
    Dia
    Claimed

Frequently asked questions

Is DeepSeek better than Dia?

It depends on your workflow. DeepSeek is built for Low-cost API integration. Dia is built for asking questions across tabs and connected work apps, summarizing pages and meetings, and organizing many open tabs.

What are the key feature differences between DeepSeek and Dia?

DeepSeek: Free AI chat app and low-cost API running DeepSeek's open-weights V4 models. Dia: An AI-native web browser that answers questions across your tabs and work apps.

Does DeepSeek or Dia have a free plan?

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

Which is cheaper, DeepSeek or Dia?

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