Merlin vs UsingOpen

A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.

Merlin compared with UsingOpen
Detail	Merlin	UsingOpen
What it does	AI assistant providing access to top AI models without sign-up or ads	Free AI chat with open models, no account or sign-up required
Stage	Not given	Not given
Founded	Not given	Not given
Based in	Not given	Not given
Pricing model	Freemium	Free
Pricing	Free plan with 102 daily queries; Merlin Pro at $19 per month billed annually. Free users get 102 queries daily with GPT 3.5, Gemini, and Claude 3 Haiku consuming 1 query each; GPT 4, Gemini 1.5, and Mistral Large consuming 30 queries each.	Free with 10 prompts per day. UsingOpen Studio desktop app is $19 USD one-time purchase, or ¥99 CNY in mainland China.
Key features	Access to multiple AI models including ChatGPT, Claude, Gemini, DeepSeek, and Mistral Real-time web search integration YouTube video summarization and transcription Chrome extension for one-click answers Social media content generation and posting Email composition with AI Custom knowledge bases and projects Code snippets and web components generation Diagram and flowchart generation AI image generation with Flux 1.1 Pro	Access to 20+ open-weight AI models including DeepSeek, Qwen, GLM, Gemma, GPT-OSS, Kimi K3 and MiniMax M3 No account required, no sign-up, no email or password needed 10 free prompts per day, reset at midnight UTC Chat history saved locally on your device, never sent to servers Streaming responses with visible reasoning for thinking models Compare two models side by side in the same conversation Live model availability status and real-time capacity information Responsive design, installable as standalone mobile app
What makes it different	Free access to multiple top AI models without separate subscriptions Works without sign-up or ads Available in 200+ countries where ChatGPT is restricted All AI tools consolidated in one affordable subscription Works seamlessly across all devices with synchronized history	Complete privacy - chat history stays only on your device and is never sent to servers Model picker with real-time availability, not a single locked-in assistant
Free plan	Not given	Not given
Open source	Not given	Not given
Platforms	Not given	Not given
Public API	Not given	Not given
Community votes	0	0
DR (Domain Rating by Ahrefs)	72 no change since last check	Not checked yet no change since last check
Trust Flow (Majestic)	19	1
Citation Flow (Majestic)	46	17
Referring domains (Majestic)	2535	5

5 details filled in for both companies.

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