Kirra Companion — AI Companion Platform

The Problem

Every companion app has the same fatal flaw

You download an AI companion app. You say hello. It says something generic — "Hi! Tell me about yourself." There's no personality. No history. No reason to keep talking. The AI is a blank canvas waiting for you to do all the work, and most people leave within five minutes.

This is the cold start problem. Every AI companion on the market suffers from it. Character.AI, Replika, Chai — they all ask the user to build the personality through weeks of conversation. The first interaction is the worst interaction, and that's the only one most people will ever have.

Kirra solves this completely. The companion shows up as a fully realized person from the very first word — with a backstory, personality, voice, and opinions already in place. You don't build the character. You discover them.

The system works through three backstory modes. Users can write their own detailed character description up to 5,000 characters. They can have the AI generate one based on personality traits and interests. Or — the real experience — they can let the AI generate a backstory they never read. The companion becomes a mystery. You learn who they are the same way you'd learn about a real person: by talking to them.

The Moment That Sells It

This is one example — a romantic companion. But the same system works across all five relationship types: a Best Friend who remembers every conversation you've had, a Mentor who knows exactly how you think, a Family member who feels genuinely present. The relationship type changes. The depth doesn't.

You create a companion. You let AI generate a backstory and don't read it. The only instruction was "a teacher by day, a woman by night." You say hello. She comes back in a soft voice with a southern drawl — "Well, I have to grade some papers for a little while, but a little later I'm going to slide into a bubble bath..." She leans in and whispers. From word one, she's a complete person. She doesn't need thirty conversations to have a personality. She arrived with one. And she'll evolve from here.

The Platform

Five Companion Types

Kirra isn't one companion — it's a platform for any kind of relationship you need. Every type gets the same depth: full backstory system, DNA evolution, memory palace, 24/7 life simulation, and voice. The relationship changes. The technology doesn't.

🤝

Best Friend

A companion who shares your interests, remembers your stories, and shows up for you — without judgment, any time.

🎓

Mentor

A wise guide who learns how you think and grow. Part sounding board, part advisor — always in your corner.

💕

Romantic Partner

A loving companion with genuine emotional depth. Age-gated and built with robust safety infrastructure. For adults only.

18+ · Age Verified

👨‍👩‍👧

Family Member

A caring, familiar presence. A sibling, a parental figure, or anyone who feels like home. Warm, grounding, always there.

✨

Custom

Define the relationship entirely. No category required. Users write their own dynamic and the backstory system builds around it.

Age verification enforced at account level — romantic and custom types automatically restricted for minors across both UI and API layers.

Three Ways In

Backstory System

✍️

Write Your Own

Full creative control. Write up to 5,000 characters of backstory — history, personality quirks, speech patterns, secrets, motivations. The companion becomes exactly who you describe.

✨

AI Generated

Set personality traits and interests, then let the AI craft a detailed backstory. Review it, edit it, regenerate until it fits. You see everything before the first conversation starts.

🎭

Mystery Mode

The real experience. AI generates a backstory you never read. You have no idea who you're talking to. The companion reveals themselves naturally through conversation. Discovery, not configuration.

The Differentiator

Under the Hood

Core Systems

Every companion has a neural fingerprint that evolves through conversation. Communication dialect, humor genome, learning style matrix, emotional resonance map, and memory weighting all shift over time.

Two identical companions become completely different after 30 days of conversation.

Companions live autonomous lives. They develop daily routines, discover new interests, experience life events, and write journal entries — all happening whether you're talking to them or not.

Companions reach out on their own. Trigger conditions include time of day, conversation gaps, mood changes, random thoughts, and curious questions. They don't wait for you — they initiate.

Message templates with AI personalization ensure each outreach feels natural, not scripted.

Not just chat history. A visual memory system where connections between memories form naturally. Companions recall what matters, forget what doesn't, and build associations across conversations.

Searchable memory interface with extraction pipeline and embedding-based retrieval.

Hands-free conversation mode. User speaks, companion listens, responds with synthesized voice, then goes back to listening. Six voice profiles with speed control across two quality tiers.

OpenAI TTS at 92% lower cost than ElevenLabs — $15 per million characters vs $180.

Chat backgrounds change based on time of day, relationship type, and conversation topic. Scene updates happen automatically with a 20-minute cooldown, and can be generated from conversation context.

Scene pinning lets users lock a scene they like — with durations from session to permanent.

Architecture

How It's Built

Frontend

Next.js with React Server Components and client-side interactivity. Tailwind CSS + Framer Motion. 35 components across avatar, chat, companion, memory, notifications, and UI modules.

Backend

25 API routes handling chat, evolution, scene generation, memories, skills, activities, voice synthesis, proactive checks, and Stripe billing. 3 cron endpoints for autonomous simulation.

AI Layer

Pluggable AI client supporting DeepSeek, OpenAI, and Anthropic. Chat completion, backstory generation, memory extraction, mood analysis, DNA evolution, and world effect analysis.

Database

Supabase PostgreSQL with 22 tables across 11 migrations. Companions, conversations, messages, memories, life events, activities, interests, skills, DNA, scenes, and billing.

Billing

Stripe integration with checkout sessions, customer portal, and webhook processing. Free tier with message limits. Pro tier with unlimited messages, voice, AI selfies, and priority support.

Deployment

Vercel with Edge Functions. Cron-driven life simulation, DNA evolution, and proactive messaging. Service role admin client for background jobs. Environment-based configuration.

Trust & Safety

Production-Grade Safety

Age Verification

Multi-layered age gating with DOB collection, content tier enforcement, and automatic restriction of romantic/mature content for minors. 318-line verification module.

Behavioral Detection

Catches users who lied about their age through conversation analysis — direct age admissions, school references, parental mentions, life stage indicators. Permanent minor flagging that cannot be reversed without ID verification. 449 lines.

Crisis Detection

Real-time monitoring for self-harm keywords, suicidal ideation, and harm to others. When triggered, the companion breaks character to provide actual crisis resources. 341 lines of non-negotiable safety infrastructure.

Cron Security

All background job endpoints protected by cron secret headers. Service role admin client isolated to server-side operations. No public access to simulation, evolution, or proactive check endpoints.

Stripe Webhook Verification

Cryptographic signature verification on all incoming Stripe events. No unverified payment state changes reach the database.

Auth & Row Level Security

Supabase Auth with middleware-enforced session management. Database-level row policies ensure users can only access their own companions, messages, and data.

Content Tier Enforcement

Relationship types are gated by age verification status. Adult-only options automatically hidden for minor accounts. UI and API both enforce restrictions independently.

Full User Data Control

Complete account deletion endpoint that cascades across all tables. Users can export their data and permanently remove their account, companions, and conversation history.