Micro-SaaS Tech Stack: Building Lean in 2026
The Micro-SaaS Tech Stack: Building Lean
Choosing the right tech stack for a micro-SaaS is about maximizing developer productivity while minimizing operational costs. As a solo founder or small team, every decision should reduce complexity, not add to it.
Hosting and Compute
Start with a platform that abstracts infrastructure complexity. Vercel or Netlify for frontend-heavy applications, Railway or Fly.io for full-stack Node.js apps, and DigitalOcean App Platform for traditional server-side applications. These platforms provide generous free tiers: Vercel offers $300 in credits over 45 days via their Pro trial, Railway provides $5 of free usage monthly, and DigitalOcean gives $200 in credits for 60 days.
For serverless compute, Cloudflare Workers at $5/month for 10 million requests is the most cost-effective option. AWS Lambda remains viable but has a steeper learning curve. Avoid managing your own servers until you have paying customers.
Database Strategy
PostgreSQL is the default choice for micro-SaaS in 2026. Supabase provides a generous free tier: 500 MB database, 1 GB file storage, 50,000 monthly active users. Neon offers serverless PostgreSQL with instant branching and a free tier of 500 MB storage. PlanetScale (MySQL-compatible) provides free databases up to 1 GB.
For caching and real-time features, Upstash offers serverless Redis with a free tier of 10,000 commands per day. For file storage, Cloudflare R2 provides egress-free object storage at $0.015/GB/month — significantly cheaper than S3 for workloads with frequent reads.
Authentication
NextAuth.js (now Auth.js) for Next.js applications provides built-in database sessions and social login support. Clerk offers the most generous free tier at 5,000 monthly active users with a superior developer experience. Supabase Auth is a solid choice if you're already using Supabase. Avoid building your own authentication system — the security risks and maintenance burden are not justified.
Payment Processing
Stripe remains the default choice for micro-SaaS payments. Stripe Checkout provides a hosted payment page with minimal integration effort. Stripe Customer Portal handles subscription management (upgrades, downgrades, cancellations). For global tax compliance, Stripe Tax automates sales tax collection. Paddle provides merchant-of-record services, handling VAT and sales tax compliance globally — saving thousands in accounting costs. Lemon Squeezy offers similar functionality with a more modern API.
Email Delivery
Transactional email requires dedicated services. Resend provides 100 free emails per day with an excellent developer experience. Postmark offers reliable delivery at $15/month for 10,000 emails. Mailgun is a cost-effective alternative for higher volumes. Loops provides email automation specifically for SaaS applications, with a free tier of 200 emails per month.
Conclusion
The ideal micro-SaaS stack combines managed services that maximize developer productivity. Starting with Supabase (database + auth), Vercel (hosting), Stripe (payments), and Resend (email) provides all the infrastructure needed to launch a SaaS product. The key insight is to pay for services that reduce complexity rather than self-managing infrastructure.