Kairos Free Alpha

AI System Architect.
Ship with confidence.

Kairos interviews you about your product, your scale, and your skills, then delivers a precise, opinionated tech stack with an interactive architecture diagram you can actually edit.

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System Blueprint
SYSTEM GENERATED // VERSION 1.0.4
ACTIVE STATEScale: MICRO
RECOMMENDEDSupabase Postgres DB
TARGET INFRASTRUCTURE:
Managed SaaS
SupabaseClerkRedis
AWSAWS
GCPGCP
EXPORT JSONEXPORT SVG

The Process

How Kairos works

01

Describe Your Product

Tell Kairos what you're building, who it's for, and what the core workflow looks like. Open-ended questions, no forms to fill.

02

Define Your Scale

Share realistic user numbers. Kairos assigns a scale tier (Nano, Micro, Small, Medium, or Large) and anchors every decision to it.

03

Share Your Context

Your strongest language, team size, budget, and DevOps comfort level. Five questions, two minutes.

04

Get Your Diagram

A complete opinionated stack recommendation plus an interactive, node-based architecture diagram you can explore, edit, and share.

Features

Everything you need to decide

Stack at a Glance

Every layer of your architecture in one table. Every choice explained.

LAYERTOOLWHY
Frontend→Vite + React + TanStack RouterFast DX, SPA is fine at Nano scale
Backend→Node.js + HonoEdge-compatible, TypeScript native
Database→Supabase (Postgres)Free tier, auth + realtime built-in
Auth→ClerkBest DX, generous free tier
Email→ResendModern API, 100 emails/day free
Hosting→Vercel + RailwayZero-config, instant deploys

Scale Tiers

Recommendations locked to your realistic scale from day one.

NANO
MICRO
SMALL
MEDIUM
LARGE
⚠

Honest Trade-offs

Every recommendation comes with what you're giving up. No sugarcoating.

Cloud vs. Managed

Kairos tells you which infrastructure model fits your scale.

FREE TIER
AWS / GCP

Interactive Diagram

Node-based architecture canvas. Click nodes, swap services, export PNG.

Frontend
→
API
→
DB

Opinionated by Default

Kairos doesn't show you a menu. It picks. Then explains exactly why, so you can push back if needed.

DECISION · NOT A LIST

Scale Tiers

Built for every stage of growth

TierUsersApproachExample Stack
NANO1 – 500Free tier everything. Ship fast, validate fast.Vercel · Supabase · Clerk · Resend
MICRO500 – 10KManaged services. Zero ops. Pay only for what you use.Railway · Neon · Better Auth · Resend
SMALL10K – 100KIntroduce caching, queues, CDN. Start thinking about reliability.Fly.io · RDS · Cloudflare · Inngest
MEDIUM100K – 1MCloud infrastructure justified. Horizontal scaling, monitoring.Cloud Run · AlloyDB · GCP · Sentry
LARGE1M+Full cloud-native. Platform engineering, SRE mindset.EKS · RDS · CloudFront · Datadog

04 // Pricing Model

Free forever. Open source. Built for builders.

100% Free Forever

No credit cards, no tiers, no paywalls. Kairos is completely free. We do not lock features behind paywalls or limit the number of blueprints you can generate.

COST: $0.00 / MO

MIT Open Source

Audit the recommendation logic, customize the LLM prompts, or run it entirely on your own local environment. Kairos is open source and hosted on GitHub.

LICENSE: MIT

Solo Dev to Solo Devs

No enterprise sales pitches, no marketing fluff. The architect is built with a bias toward low-maintenance, cost-effective, and highly scalable technologies.

TARGET: INDIE HACKERS
KAIROS // LICENSING & VERIFICATIONSTATUS: COMMITTED
$ git show-license --project kairos
▶ MIT License (c) 2026 Aditya
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies...

Your decisive
moment is now.

The right tool, at the right scale, for the right builder.

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