AmsoniaView source packages
Amsonia / Product family / By Willuny Labs

Build the product. Own the foundation.

Source-owned SaaS foundations for two ways of shipping.

Choose a commercial Go + Next.js platform for multi-tenant B2B software, or start with a focused open-source Next.js kit. Both keep your application, data, and deployment decisions in your hands.

Choose your foundation Explore open-source Next
Two product pathsSource owned
01 / CommercialAmsonia PlatformGo + Next.js · Multi-tenant B2B02 / MITAmsonia NextNext.js 16 · Single-tenant starter
Additional open sourceView engineering work on GitHub ↗
FAMILY / 00

One product family, not one forced stack.

Each product has a distinct buyer, license, and architecture. Shared principles connect them; search intent and technical scope stay explicit.

Published by Willuny Labs.

This site owns product evaluation. Willuny Labs remains the company, seller, and commercial support boundary.

Products / Pick the constraint

Start with the architecture you actually need.

Platform is for a team already committed to Go and multi-tenant operations. Next is for a product that benefits from one full-stack Next.js codebase and a smaller operating surface.

PLATFORM / COMMERCIAL SOURCE

Amsonia Platform

A Go + Next.js SaaS starter kit for multi-tenant B2B products.

  • Go API and Next.js product surface
  • Tenant and workspace boundaries
  • Roles, permissions, and operations
  • Stripe-oriented commerce and billing
Evaluate Platform →Go SaaS guide →
NEXT / OPEN SOURCE / MIT

Amsonia Next

A single-tenant Next.js 16 SaaS starter for founders who want a focused full-stack base.

  • Auth.js and PostgreSQL with Drizzle
  • Stripe and Lemon Squeezy adapters
  • Admin, account, audit, and billing flows
  • English and Chinese route foundations
Explore Amsonia Next →GitHub source ↗
Decision / No vague tiers

Choose by system boundary.

The deciding question is not free versus paid. It is whether your product needs a Go service and multi-tenant operating model now.

COMPARE / 01

Platform vs Next

Compare runtime, tenancy, license, billing providers, and the intended team.

ARCH / 02

Platform architecture

See how the Go API, Next.js surfaces, PostgreSQL, and deployment boundary fit together.

TENANCY / 03

Multi-tenant by design

Follow tenant context from identity through authorization, jobs, cache keys, and data access.

OSS / 04

Inspect the source

Start with Amsonia Next, review its license, and follow the implementation before adopting it.

Commercial path

Need multi-tenant Go?

Evaluate Amsonia Platform here, then continue to the transaction-only source package catalog operated by Willuny Labs.

View Platform source packages