Duck.ai Review, Pricing & Alternatives (2026)

Duck.ai is DuckDuckGo’s optional AI chat interface, launched in June 2024 as DuckDuckGo AI Chat and renamed after leaving beta on March 6, 2025. It proxies prompts to third-party models rather than offering one proprietary foundation model. Users can begin without an account, and DuckDuckGo says it removes metadata such as IP addresses before forwarding prompts. The service supports chat, summarization and text composition, and users can continue conversations from DuckDuckGo search. Recent Chats remain stored locally by default. Optional Sync & Backup keeps encrypted copies on DuckDuckGo’s servers, with the decryption key staying on users’ devices. The Free plan includes Claude 4.5 Haiku, Mistral Small 4, GPT-6 Luna, GPT-5.4 mini, gpt-oss-120b and Gemma 4 31B. Duck.ai does not publish a separate user count or funding figure.

A typical Duck.ai session starts with a model choice, followed by a prompt for chat, composition or summarization. From DuckDuckGo search, users can carry the current search context into a conversation, which is useful for turning search results into a draft without opening another chatbot account. Recent Chats remain in local browser storage by default. Optional Sync & Backup stores encrypted copies on DuckDuckGo’s servers, and the company says it cannot decrypt them because the key stays on users’ devices. Users can pin up to five chats. The service also removes metadata such as IP addresses before forwarding prompts to providers, according to DuckDuckGo. In practice, the workflow is choose a model, write, revise and switch models when another provider produces a better fit, while daily and weekly usage limits vary by model and reset on fixed UTC schedules.

Duck.ai’s current lineup is a rotating set of third-party models rather than a DuckDuckGo foundation model. The Free tier lists Claude 4.5 Haiku, Mistral Small 4, GPT-6 Luna, GPT-5.4 mini, gpt-oss-120b and Gemma 4 31B. Plus adds GPT-5.6 Terra and Claude Sonnet 4.6, while Pro adds Claude Opus 4.8 and GPT-5.6 Sol. Subscription-only entries carry asterisks on DuckDuckGo’s comparison page. Earlier 2025 listings included GPT-4o mini, o3-mini, Llama 3.3, Mistral Small 3 and Claude 3 Haiku. The lineup therefore describes access through Duck.ai, not a proprietary DuckDuckGo release program. Model names and availability can change, and DuckDuckGo does not publish a stable context-window specification or independent benchmark for the service. That makes Duck.ai’s main technical feature model switching, rather than ownership of one named system.

The Free tier costs $0 and includes Claude 4.5 Haiku, Mistral Small 4, GPT-6 Luna, GPT-5.4 mini, gpt-oss-120b and Gemma 4 31B, subject to a daily allowance. In the United States, Plus costs $9.99 per month or $99.99 per year, while Pro costs $19.99 per month or $199.99 per year. Plus adds GPT-5.6 Terra, Claude Sonnet 4.6, advanced reasoning, VPN, Personal Information Removal and identity-theft restoration. Pro includes those benefits, adds Claude Opus 4.8 and GPT-5.6 Sol, increases reasoning effort and provides twice Plus usage. DuckDuckGo does not publish exact daily or weekly quotas. Daily limits reset at midnight UTC, weekly limits reset Sunday at midnight UTC, and models consume different amounts of allowance, making heavier models more restrictive for frequent users.

Duck.ai’s main limitation is that switching models does not remove the uncertainty of generated text, and DuckDuckGo does not disclose exact daily or weekly quotas. ChatGPT, Claude and Google Gemini offer deeper single-provider histories and account-based continuity, while Duck.ai combines anonymous access to several named models with DuckDuckGo search follow-ups. Proton Lumo is a closer privacy comparison, priced at $12.99 monthly or currently $9.99 monthly on its annual offer, while Duck.ai offers Free, Plus and Pro tiers. Duck.ai’s terms prohibit automated querying and developing or offering AI services, and they provide no separate commercial-output license. Choose Duck.ai for account-free drafting across multiple providers, ChatGPT for continuity within one service, Claude for a focused assistant, or Lumo for a privacy-focused single-provider alternative.