Duck.ai
Chat with ChatGPT, Claude and other AI models without handing over your data
Freemium
Kagi
Ad-free, subscription-funded search engine with built-in AI assistant and summarization tools
Free trial
Verdict
Duck.ai and Kagi are both AI Assistants tools. Kagi scores higher in FinderAtlas's editorial review (8.1 vs 7.8 out of 10), led by feature depth and performance & speed. Both have a free plan or trial. Only Kagi is available on iOS and Android and offers an API.
Best overall
Kagi
- Privacy-conscious users
- Researchers
- Developers
- Heavy web searchers
Choose Duck.ai if
- You want a tool built for everyday questions and drafting where you do not want chats tied to an account or used for training, and trying several models in one place.
- Free tier works without an account.
- Personal metadata such as IP address is removed before prompts reach providers.
Choose Kagi if
- You want a tool built for people who want ad-free, personalizable search results and are willing to pay a subscription to get them.
- No advertising; revenue comes from subscriptions.
- Site-level raise, lower and block controls let users tune results.
- Best for beginners
- Kagi
- Best for business
- Kagi
Features
17 features compared.
- Multi-model chatDuck.aiAvailableKagiNot available
- No account requiredDuck.aiAvailableKagiNot available
- Metadata removalDuck.aiAvailableKagiNot available
- No training on chatsDuck.aiAvailableKagiNot available
- Local recent chatsDuck.aiAvailableKagiNot available
- Voice chatDuck.aiAvailableKagiNot available
- Image generationDuck.aiAvailableKagiNot available
- File and image uploadDuck.aiAvailableKagiNot available
- Subscription bundleDuck.aiAvailableKagiNot available
- Ad-free searchDuck.aiNot availableKagiAvailable
- Site personalizationDuck.aiNot availableKagiAvailable
- LensesDuck.aiNot availableKagiAvailable
- Kagi AssistantDuck.aiNot availableKagiAvailable
- Quick Answer and Summarize PageDuck.aiNot availableKagiAvailable
- Developer APIsDuck.aiNot availableKagiAvailable
- Orion browserDuck.aiNot availableKagiAvailable
- Kagi Translate and Kagi NewsDuck.aiNot availableKagiAvailable
Pricing
Plans as listed by each vendor. Check their sites for current prices.
- Pricing modelDuck.aiFreemiumKagiFree trial
- Free planDuck.aiYesKagiYes
- Starting priceDuck.ai$0Kagi$0
- PlansDuck.ai3 plansKagi4 plans
Duck.ai plans
Free
$0
No-account access to smaller models within daily limits
- Text chat
- Voice chat
- Image generation
- Daily usage limits
Plus
Most popular$9.99/month
DuckDuckGo subscription with advanced models and privacy bundle
- Advanced models
- Reasoning models
- VPN
- Personal Information Removal
- Identity Theft Restoration
Pro
$19.99/month
Highest reasoning models and doubled usage
- Everything in Plus
- Claude Opus access
- Highest reasoning effort
- 2x Plus usage limits
Kagi plans
Trial
$0
Free trial to evaluate Kagi
- 100 searches
- 100 Assistant interactions
Starter
$5/month
Entry plan for light searchers
- 300 searches
- Assistant Quick mode
Professional
Most popular$10/month
Unlimited search for regular users
- Unlimited searches
- Assistant Quick mode
- larger monthly Assistant allowance
Ultimate
$25/month
Full AI access
- Unlimited searches
- Assistant Research mode
- flagship models including Claude
- GPT and Gemini
- highest level of support
Our ratings
Scored out of 10 by the Finder Atlas editorial team. Last reviewed October 2026.
- Duck.ai
- 7.8overall
- Kagi
- 8.1overall
Duck.ai leads in 2 categories and Kagi in 3.
Ease of Use
Duck.ai leads by 0.8- Duck.ai
- 9.0
- Kagi
- 8.2
Feature Depth
Kagi leads by 1.6- Duck.ai
- 7.0
- Kagi
- 8.6
Value for Money
Duck.ai leads by 0.6- Duck.ai
- 8.0
- Kagi
- 7.4
Performance & Speed
Kagi leads by 0.9- Duck.ai
- 7.5
- Kagi
- 8.4
Documentation & Support
Kagi leads by 0.3- Duck.ai
- 7.5
- Kagi
- 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
Duck.ai
Pros
- Free tier works without an account.
- Personal metadata such as IP address is removed before prompts reach providers.
- Chats are not used for training by DuckDuckGo, and providers agree not to train on them.
- Several providers' models are available from one interface.
- Plus ($9.99/month) bundles a VPN and identity protection services.
Cons
- Free tier is limited by daily usage caps, and the paid limits are not published as numbers.
- Strongest models are subscriber-only, and the top tier costs $19.99/month.
- No public API and no standalone mobile app found.
- Chat history is local by default, so it does not sync across devices without opting into Sync & Backup.
Kagi
Pros
- No advertising; revenue comes from subscriptions.
- Site-level raise, lower and block controls let users tune results.
- Lenses give quick topic-specific filtering such as Academic or Forums.
- Ultimate bundles access to Claude, GPT and Gemini models in Assistant.
- Public APIs and an MCP server support developer use.
- Transparent funding history published by the company.
Cons
- No permanent free tier: the trial is limited to 100 searches.
- The $5 Starter plan caps searches at 300 per month, which users report running out of quickly.
- Reviewers report that lens use and loading more results can count as extra searches.
- Full AI model access requires the $25 Ultimate plan.
Platforms
- WebDuck.aiSupportedKagiSupported
- WindowsDuck.aiNot supportedKagiNot supported
- macOSDuck.aiNot supportedKagiNot supported
- iOSDuck.aiNot supportedKagiSupported
- AndroidDuck.aiNot supportedKagiSupported
- APIDuck.aiNot supportedKagiSupported
- Browser ExtensionDuck.aiNot supportedKagiNot supported
Integrations
Duck.ai
2 integrations- DuckDuckGo Search
- DuckDuckGo Browser
Kagi
4 integrations- Anthropic Claude
- OpenAI GPT
- Google Gemini
- MCP
Company
- CompanyDuck.aiDuckDuckGoKagiKagi Inc.
- FoundedDuck.ai2008Kagi2018
- HeadquartersDuck.aiPaoli, PAKagiSan Francisco, CA
- ListingDuck.aiClaimedKagiClaimed
Featured AI Assistants
Picked by our editors. Not paid placement.
Editor's pickClaude
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Anthropic's AI assistant for writing, analysis, coding and working with files
FreemiumRated4.5(2)
Editor's pickDeepSeek
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Free AI chat app and low-cost API running DeepSeek's open-weights V4 models
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Editor's pickGemini Notebook
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Google's Gemini Notebook, formerly NotebookLM, answers questions and builds summaries from your own sources
Freemium
Related comparisons
More AI Assistants tools, head to head.
Duck.ai vs Claude
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- Duck.ai
- Freemium
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Kagi vs Claude
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Duck.ai vs DeepSeek
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Kagi vs DeepSeek
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Duck.ai vs Gemini Notebook
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Kagi vs Gemini Notebook
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- Gemini Notebook
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Frequently asked questions
Is Duck.ai better than Kagi?
It depends on your workflow. Duck.ai is built for everyday questions and drafting where you do not want chats tied to an account or used for training, and trying several models in one place. Kagi is built for people who want ad-free, personalizable search results and are willing to pay a subscription to get them.
What are the key feature differences between Duck.ai and Kagi?
Duck.ai: Chat with ChatGPT, Claude and other AI models without handing over your data. Kagi: Ad-free, subscription-funded search engine with built-in AI assistant and summarization tools.
Does Duck.ai or Kagi have a free plan?
Yes, both do. Duck.ai is freemium and Kagi is free trial, and each has a free plan or trial.
Which is cheaper, Duck.ai or Kagi?
Both can be used for free. Paid plans differ in limits and features, so compare the tiers in the pricing table above.