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cosskill vs Unium™

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

cosskill compared with Unium™
Detailcosskill logo cosskillUnium™ logo Unium™
What it doesAI roleplay simulator for rehearsing high-stakes conversations Shared AI chat for couples, friends and family
StageNot given Not given
FoundedNot given Not given
Based inNot given GB
Pricing modelFreemium Free trial
PricingFree: 3 messages without signup, 10 messages after sign-in. Pro Monthly: $12.90/month. Pro Yearly: $129/year (saves $25.80 vs monthly, about $10.75/month). Free for 2 days (includes Balanced model, memory, voice notes and images, up to 5 people, no card needed). Together $10/month with balanced model, memory, voice notes, image generation, and extended model choice. Together Plus $20/month includes up to 2.2× the usage of Together. Household $40/month
Key features
  • 33 personas including Elon Musk, Steve Jobs, Donald Trump, Socrates, and specialized coaches
  • Goal-oriented Mission Mode with live reaction meters
  • 30 conversation guides for different scenarios
  • Method personas with specific communication frameworks
  • Practice without creating an account
  • Private personas and chat history sync for signed-in users
  • No content filters for difficult topics
  • Encrypted chat storage for signed-in users
  • Shared chats where multiple people can join the same conversation
  • Switch between AI models without losing context
  • Memory across chats
  • Voice notes and image generation
  • Private chats alongside shared ones
  • Web search integration
  • Add up to 10 people to one subscription
  • Available on iPhone, Android and web
  • Access to multiple AI models including GPT-6 and Claude Opus 5.5
  • No data training on user conversations
What makes it different
  • Builds communication as a muscle through practice, not theory
  • AI personas push back and test your boundaries unlike entertainment chatbots
  • Free access to all personas and scenarios, no paywall for basic practice
  • Privacy-first with no data selling or model training on user chats
  • Personas configured with specific methods like NVC and Socratic questioning, not celebrity imitations
  • Multiple people in one chat instead of separate conversations
  • One subscription covers everyone on the account with no additional charges
  • Switch AI models without losing memory or context
  • AI facilitates discussion by asking both perspectives before suggesting compromises
  • Chats are shared by default but can be made private
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)9 −1 (down) since last check20 +3 (up) since last check
Trust Flow (Majestic)190
Citation Flow (Majestic)219
Referring domains (Majestic)622

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