Kajiwoto is an AI character creation and companion platform that lets users build bespoke chatbots (called Kajis) by specifying prompts, memories, personality traits, datasets and model choices. The system supports creating characters from scratch or adopting community-created Kajis, and those characters can be trained or extended with private datasets and example dialogues so their responses reflect a designed persona and history.

The product offers a mix of features for personalization and social interaction: multi-model selection, memory management, custom prompt and dataset editors, private and public chat rooms, group chats, and voice/chat integrations on mobile (iOS/Android) and web. The platform emphasizes roleplay, creative storytelling and companionship use cases, and includes discovery tools so users can browse and interact with a wide variety of community-created characters. It also provides controls for making Kajis public or keeping them private and supports cross-device sync.

Kajiwoto’s audience includes hobbyists and enthusiasts who want to build conversational characters, roleplayers and storytellers, creative writers and content creators exploring interactive characters, and users seeking virtual companionship or social experiences. The platform is commonly described as having a steep customization learning curve but strong depth for users who want fine-grained control over an AI character’s behavior. While the core offering is free, paid subscription tiers expand model access, increase room/character limits, memory or dataset capacity, and unlock advanced training/customization capabilities. The platform is not presented as open-source and does not advertise a public developer open-source codebase.