Saturn brings projects, timesheets, invoices, and client management into one place. No more spreadsheets. No more chasing emails. Just open Saturn and get to work.

Whether you're a solo developer or a design agency with 20 people, Saturn adapts to how you work.

Features

Requirements

Write detailed project requirements with a rich-text editor — images, code blocks, and all. Share them with clients for review. Clients leave threaded comments, request changes, or sign off with a digital signature — all without leaving Saturn.

Proposals

Draft and send proposals. Clients review and approve without leaving the platform.

Milestones

Break work into milestones. Track what's done, what's in progress, and what's next.

Timesheets

Log hours against requirements with weekly, biweekly, or monthly views. Send reports to clients and generate invoices directly from tracked time.

Expenses

Track project expenses by category — hosting, design tools, APIs, and more.

Invoices

Generate invoices with line items pulled from timesheets and expenses. Export as PDF and send them to clients.

Client Portal

Clients register on the same platform — no separate portal. They get invited to your projects and see milestone progress, requirements to sign, and invoices to review. Your internal timesheets and team rates stay private.

Roles & Permissions

Four roles with fine-grained permissions:

• Owner — Full control over the organization, billing, members, and all projects.
• Admin — Day-to-day management. Creates projects, sends invoices, manages the team.
• Member — Does the work. Logs time, writes requirements, submits expenses.
• Client — Reviews work, signs off on requirements, approves invoices.

Tech Stack

• Framework — Next.js
• Auth — Better Auth
• Database — Drizzle ORM with PostgreSQL
• Styling — Tailwind CSS
• Storage — S3-compatible object storage
• Email — React Email

Getting Started

# Install dependencies
bun install

# Set up environment variables
cp .env.example .env

# Run database migrations
bun db:migrate

# Start the dev server
bun dev

Pricing

• Free — 1 organization, 2 projects, unlimited team members, all core features.
• Pro ($3/mo) — Unlimited organizations and projects, API access for automation, priority support.

No credit card required. No feature gates on core functionality.

License

This project is not open source. All rights reserved.