Best AI Companion Apps
A side-by-side comparison of the leading AI companion platforms across memory, characters, privacy, safety, and pricing.
LUKi
ChatGPT
Replika
Character.AI
Pi
Chai
Persistent Memory
Structured ELR (13 types)
Limited notes
Basic recall
None
Some recall
Limited
Characters
6 curated + unlimited custom
Custom GPTs
One companion
Millions (UGC)
One voice
Millions (UGC)
Visual Avatars
Animated video + NFT lore cards
None
3D avatar + AR
Generated images
None
Text cards
Custom Creation
LUKi Maker (full control)
GPT Builder
Trait customization
Character builder
None
Character builder
Data Ownership
User-owned, encrypted
OpenAI-owned
Company-owned
Platform-owned
Platform-owned
Platform-owned
Safety System
Crisis detection + 988
Content filter
Basic moderation
Content filter
Responsible AI
Community mod
Cognitive Games
4 games
None
Activities
None
None
None
Image Generation
In-chat generation
DALL-E
Limited
Character images
None
Limited
Free Tier
25 msg/day
Generous
Limited
Generous
Fully free
Limited
Mobile Apps
iOS, Android
iOS, Android
iOS, Android
iOS, Android
iOS, Android
iOS, Android