AI Companion Apps Compared

Compare companion styles, memory features, Characters, platforms, and current plan information. Choose the features that matter to your conversations.

Reviewed September 5, 2026. Sources describe available features, not a measured ranking. Check the linked provider pages for current availability and plan limits.

ChatGPT

Replika

Character.AI

Pi

Chai

Focus

A cat companion for ongoing conversations.Meet LUKi

An assistant for questions, learning, writing, and work.ChatGPT overview

A personal AI companion for ongoing conversation.Replika features and availability

Character conversations, storytelling, and interactive entertainment.About Character.AI

Conversation, learning, decision support, reminders, and to-dos.Pi features and availability

Social AI conversations and stories.CHAI product and app links

Memory

Persistent companion memory across conversations.LUKi memory FAQ

Optional memory personalizes replies using past context. Users can review, correct, or disable it.ChatGPT Memory FAQ

Replika describes remembering people, routines, plans, and interests across conversations.Replika features and availability

Story Memory and pinned messages. Paid Facts are captured automatically and can be edited, disabled, and copied into new chats.Character.AI memory release, May 21, 2026

Not assessed in this comparison.

Not assessed in this comparison.

Characters

Six personalities and custom Characters through LUKi Maker.LUKi Characters

Custom instructions and GPTs. Creating new GPTs depends on workspace eligibility and permissions.ChatGPT GPT creation guide

A companion with customizable appearance.Replika features and availability

Discover community Characters and create your own.About Character.AI

A personal AI called Pi, with voice conversation.Pi features and availability

Build your own AI characters and stories.CHAI product and app links

Platforms

Web available. iOS and Android coming soon.LUKi availability

Web, mobile, and desktop apps.ChatGPT downloads

iOS and Android. The provider also links to its legacy web app.Replika features and availability

Web, iOS, and Android.About Character.AI

Web, iOS, and Android.Pi features and availability

The provider links to iOS and Android apps.CHAI product and app links

Pricing

Free, Core, and Eternal. See current prices and plan limits.Compare LUKi plans

Check the provider’s current plans and in-app offers before subscribing.ChatGPT plans

Check the provider’s current plans and in-app offers before subscribing.Replika features and availability

Check the provider’s current plans and in-app offers before subscribing.Character.AI current offers

Check the provider’s current plans and in-app offers before subscribing.Pi features and availability

Check the provider’s current plans and in-app offers before subscribing.CHAI product and app links