hourzero.dev is the foundation I built for myself and I'm now sharing with you. I've even deployed and used this as a ChatGPT replacement for myself. I own my stack and, most importantly, my data.
What you get out of the box:
Streaming chat with multi-model support (OpenAI, Anthropic, Gemini or any other model — switch with a config change)
Bespoke chat-tread compaction logic that plays nice with prompt caching's cost savings. You're not locked in to Anthropic's API, apply to any model
Google Calendar, Gmail, Docs, Spreadsheet and Drive connectors
Microsoft Calendar, Outlook, OneDrive and Sharepoint connectors
Better-Auth — you own your auth, your users, your data. Not locked into any auth vendor. Comes with email auth, gmail OAuth, orgs, teams, role-based access & management, password reset / update, account deletion
S3-compatible file uploads using presigned URLs — zero bandwidth costs (SAFELY upload direct-to-bucket), works with Railway, AWS S3, Cloudflare R2, or anything S3-compatible. I do want to emphasize SAFETY. You don't have to worry whether you’ve accidentally built a public “upload anything” endpoint with extra steps :)
Share conversations and files among users / team members / org members
Stripe subscriptions with token limits and real time usage tracking per user / per team / per org
Upstash Redis rate limiting — nearly free at any scale
Resend for emails
Tool use: web search (SERP, snippet search, webpage retrieval), code execution, memory tool — all configurable
Persistent cross-conversation memory with a user-managed memory bank
Postgres + Drizzle ORM — one env variable change to switch between Supabase, Neon, PlanetScale, or your own instance
Vercel 1-click deploy or Docker for literally anywhere else
Fully typed TypeScript throughout, Next.js App Router, shadcn/ui, tRPC, tanstack + other goodies
Who it's for:
Freelancers who build AI chatbot products for clients and want to ship in days instead of weeks. Indie developers building their first AI SaaS. Teams that need a multitenant chatbot foundation with org management and RBAC already built-in. Anyone who's been asked to build "something like ChatGPT but just for our company" and doesn't want to start from scratch for the fifth time.
One-time purchase. Lifetime updates. Unlimited projects.
