Duck.ai review

Duck.ai is the pick for people who like ChatGPT's models but not the data trail. DuckDuckGo says it does not record or store chats by default, strips metadata such as your IP address before passing prompts to providers, and has agreements requiring providers to delete prompts after replying and never train on them; it publishes the few exceptions, such as up to one hour of in-memory prompt caching for OpenAI and Anthropic. The free tier offers Claude Haiku 5.5, GPT-6 Luna, GPT-5.4 mini, Mistral Small 4 and two open-weight models with a daily limit, no account required. The DuckDuckGo subscription adds stronger models: Plus at $9.99 per month brings GPT-5.6 Terra and Claude Sonnet 5.5 plus a VPN and data broker removal, and Pro at $19.99 adds Claude Opus 5.5, GPT-5.6 Sol and twice the Plus limits. The trade-off is scope: uploads cover images and PDFs only, and DuckDuckGo does not document agents, coding tools or connectors.

Who it is for

ChatGPT users who care most about privacy but still want GPT and Claude models.

Price

Free with daily limits; DuckDuckGo Plus $9.99 per month or $99.99 per year; Pro $19.99 per month.

The Plus plan costs $9.99 a month, or $99.99 a year
Quoted from the vendor pricing page on November 10, 2026.

Key features

• Free models include Claude Haiku 5.5, GPT-6 Luna, GPT-5.4 mini, Mistral Small 4, gpt-oss-120b and Gemma 4 31B
• Plus adds GPT-5.6 Terra and Claude Sonnet 5.5; Pro adds Claude Opus 5.5 and GPT-5.6 Sol
• IP address and other identifying metadata removed before prompts reach model providers
• Recent chats stored locally on your device
• Image and PDF uploads on supported models, up to 15 pages on Free and 50 on Pro

Strengths and weaknesses

• Strength: DuckDuckGo says it does not record or store chats by default
• Strength: Model providers agree not to train on Duck.ai conversations
• Strength: No account needed for the free tier
• Weakness: No spreadsheet uploads
• Weakness: Daily and weekly usage limits, with the free tier capped daily
• Weakness: Fewer tools than ChatGPT, such as no agent or coding workspace documented

Key facts

• Free plan: Yes, daily usage limit
• Plus: $9.99 per month or $99.99 per year, bundled with VPN and other services
• Pro: $19.99 per month, Opus 5.5 and GPT-5.6 Sol, 2x Plus limits
• Model training: Prohibited for all model providers

Where it ranks

Duck.ai is No. 3 in our Best ChatGPT Alternatives verdict.