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HammerAI vs UsingOpen

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

HammerAI compared with UsingOpen
DetailHammerAI logo HammerAIUsingOpen logo UsingOpen
What it doesFree private AI chat and roleplay platform Free AI chat with open models, no account or sign-up required
StageNot given Not given
FoundedNot given Not given
Based inNot given Not given
Pricing modelFreemium Free
PricingFree: unlimited local AI chat, 600 cloud messages/day, 2 cloud LLMs, 8,192 token context. Starter: $9/month with 1,500 credits/month, unlimited cloud messages, 4 cloud LLMs, 16,384 token context. Advanced: $18/month with 3,500 credits/month, 8 cloud LLMs, 32,768 token context. Ultimate: $35/month wi Free with 10 prompts per day. UsingOpen Studio desktop app is $19 USD one-time purchase, or ¥99 CNY in mainland China.
Key features
  • Local AI models with offline support
  • 20+ language models supported
  • AI character roleplay
  • AI story writing
  • Group chats with multiple AI characters
  • No account required for local use
  • Conversation memory with automatic summaries
  • 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
  • Completely free local AI chat with no internet required
  • Total privacy with no data collection for local models
  • Works offline on desktop without any account
  • Support for 20+ open-source language models
  • Cloud and local options with cross-platform availability
  • 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 planNot given Not given
Open sourceNot given Not given
PlatformsNot given Not given
Public APINot given Not given
Community votes00
DR (Domain Rating by Ahrefs)52 +1 (up) since last checkNot checked yet no change since last check
Trust Flow (Majestic)71
Citation Flow (Majestic)3517
Referring domains (Majestic)2455

5 details filled in for both companies.

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