Saas.js vs FastSaaS: Head-to-Head Comparison
Choosing between Saas.js and FastSaaS? We've compared both boilerplates across pricing, features, tech stack, and more. FastSaaS is $153 cheaper, but pricing isn't everything. Let's dive into the details.
At a glance: Saas.js costs $245 - $949 and FastSaaS costs $92 - $463, so FastSaaS is $153 cheaper to start. Both are built on PostgreSQL, Stripe. Only Saas.js lists Database. Only FastSaaS lists Admin Panel. Updated 2026-11-05.
Saas.js
Saas.js (formerly Saas UI): TanStack Start and Next.js starter kit for B2B SaaS with Better Auth, workspaces, Stripe billing, Drizzle, tRPC and tests.
FastSaaS
FastAPI SaaS boilerplate with PostgreSQL, email and Google OAuth auth, Stripe subscriptions, multi-tenant teams, Docker and CI/CD pipelines.
Saas.js Tech Stack
NextJS Better Auth 
React 
TypeScript 
Chakra 
Figma 
PostgreSQL 
Drizzle 
TanStack 
Playwright 
Resend 
Stripe FastSaaS Tech Stack
FastAPI 
Python PostgreSQL 
Docker Stripe 
Sentry | Specification | Saas.js | FastSaaS |
|---|---|---|
| Starting price | $245 | $92 |
| Price range | $245 - $949 | $92 - $463 |
| Stack | NextJS, Better Auth, React, TypeScript, Chakra, Figma, PostgreSQL, Drizzle, TanStack, Playwright, Resend, Stripe | FastAPI, Python, PostgreSQL, Docker, Stripe, Sentry |
| Integrations listed | 15 | 10 |
| Auth | ✓ | ✓ |
| Payments | ✓ | ✓ |
| Database | ✓ | — |
| ✓ | ✓ | |
| AI | — | — |
| Admin Panel | — | ✓ |
| Multi-tenancy | ✓ | ✓ |
| SEO | — | — |
| Blog | — | — |
| Analytics | — | — |
| Agent readiness · checked 2026-08-17 | ||
| AGENTS.md included | ✓ | ? |
| CLAUDE.md included | ✓ | ? |
| Cursor rules included | — | ? |
| Ships Claude skills | — | ? |
| Ships subagents | — | ? |
| MCP integrations | ✓ | ? |
| Tests an agent can run | ✓ | ? |
| TypeScript | ✓ | ? |
| Agent-readiness score | 65/100 | 0/100 |
| Everything else either kit lists | ||
| 2FA | ✓ | — |
| API | ✓ | — |
| Billing | ✓ | ✓ |
| CI/CD | ✓ | ✓ |
| Components | ✓ | — |
| Dashboard | ✓ | — |
| Deployment | — | ✓ |
| Documentation | ✓ | — |
| Onboarding | ✓ | — |
| Support | — | ✓ |
| Themes | ✓ | — |
| User Management | ✓ | ✓ |
A question mark means the vendor's public documentation does not mention that capability. It is not a statement that the boilerplate lacks it. How we score agent readiness
Specifications last updated , from the BoilerplateHub catalog.
Which Should You Choose?
Choose Saas.js if you prioritize 2FA and API. Choose FastSaaS if Admin Panel and Auth are more important to your project.
Frequently Asked Questions
What is the difference between Saas.js and FastSaaS?
Saas.js costs $245 and includes 15 features. FastSaaS costs $92 and includes 10 features. Saas.js uniquely offers 2FA, API, Components. FastSaaS uniquely offers Admin Panel, Deployment, Support.
Which is cheaper, Saas.js or FastSaaS?
FastSaaS is cheaper at $92, which is $153 less than Saas.js ($245).
Do Saas.js and FastSaaS use the same tech stack?
Yes, both share PostgreSQL, Stripe in common. Saas.js uses NextJS, Better Auth, React, TypeScript, Chakra, Figma, Drizzle, TanStack, Playwright, Resend exclusively, while FastSaaS uses FastAPI, Python, Docker, Sentry exclusively.
Which has more features, Saas.js or FastSaaS?
Saas.js has more features (15 vs 10). See the feature matrix above for the full breakdown.
Should I choose Saas.js or FastSaaS?
Choose Saas.js if you need 2FA and API and prefer its tech stack. Choose FastSaaS if Admin Panel and Auth are higher priorities. If price is the deciding factor, FastSaaS is $$153 cheaper.