You just validated your micro-SaaS idea. 12 people said they’d pay for it. Now you need to build it — fast, cheap, and without a co-founder. You don’t need enterprise infrastructure. You need a $0-50/month stack that scales to your first 100 customers without breaking.
Most “tech stack” guides recommend tools for Series A startups with $2M in the bank. This is not that. This is the bare-bones, battle-tested stack for solopreneurs who need to ship in 4 weeks, not 4 months.
The Real Problem: Most Stacks Are Overkill
I’ve launched 3 micro-SaaS products. My first tech stack cost $340/month before I had a single customer. AWS, MongoDB Atlas, SendGrid premium, Auth0 — all overkill for 0 users.
My third launch? $12/month for the first 6 months. Hit $4,200 MRR before crossing $100/month in infrastructure costs. Same functionality. Better unit economics.
The difference wasn’t cutting corners. It was picking tools built for solopreneurs, not enterprise teams.
Your $0-50/Month Micro-SaaS Stack (2026)
Here’s the stack that works for your first 100-500 customers. I’ve grouped tools by function with exact pricing at different scales.
Frontend Hosting: Vercel or Netlify ($0-20/month)
Vercel is the default choice for Next.js apps. Free tier covers 100GB bandwidth and 100 builds/month — more than enough for early traction. Edge functions deploy globally in seconds. Automatic HTTPS, preview deployments, and zero-config CI/CD.
You’ll hit the free tier limit around 300-500 active users (assuming normal usage patterns). Pro tier at $20/month buys you 1TB bandwidth and priority support.
Netlify is the alternative if you’re building with React, Vue, or static sites. Similar free tier (100GB bandwidth, 300 build minutes). Edge Functions on free tier (Vercel charges for serverless function compute). Split testing built-in (Vercel requires paid tier).
My choice: Vercel for Next.js, Netlify for everything else. Both are rock-solid. You can’t pick wrong.
Cost at different scales:
- 0-300 users: $0/month
- 300-1,000 users: $20/month
- 1,000+ users: $20-50/month (bandwidth overages kick in)
Backend & Database: Supabase or Firebase ($0-25/month)
Supabase is Postgres + authentication + real-time subscriptions + storage in one package. Free tier gives you 500MB database, 1GB file storage, 2GB bandwidth. That’s 500-1,000 users depending on your data model.
The killer feature? You’re writing SQL, not learning a proprietary query language. When you outgrow Supabase, migrating to self-hosted Postgres is trivial. Try doing that with Firebase Firestore.
Pro tier at $25/month unlocks 8GB database, 100GB storage, daily backups. You’ll need this around 1,000-2,000 users.
Firebase is the Google alternative. Firestore (NoSQL document database) + authentication + hosting + cloud functions. Free tier is 1GB storage, 10GB bandwidth, 50K reads/day.
Firebase scales better under extreme read-heavy workloads (think viral social apps). But Supabase’s relational model makes complex queries easier for most SaaS use cases.
My choice: Supabase for B2B SaaS (relational data, complex queries). Firebase for consumer apps with simple data models and extreme scale needs.
Cost at different scales:
- 0-500 users: $0/month (Supabase free tier)
- 500-2,000 users: $25/month (Supabase Pro)
- 2,000+ users: $25-100/month (usage-based pricing kicks in)
Authentication: Clerk or Supabase Auth ($0-25/month)
If you picked Supabase, authentication is included. Email/password, magic links, OAuth (Google, GitHub, etc.), and row-level security built-in. Zero additional cost.
If you’re using Firebase or a custom backend, Clerk is the best standalone auth solution for 2026. Beautiful pre-built components (sign-up forms, user profiles, account settings). Free tier covers 10,000 monthly active users — way more than your first 100 customers.
Clerk handles edge cases you’ll forget: email verification, password resets, session management, device tracking, security events. You get enterprise-grade auth without enterprise complexity.
Pro tier at $25/month adds custom domains, SAML SSO (for enterprise customers), and advanced security. You won’t need this until you’re past $20K MRR.
My choice: Supabase Auth if you’re already using Supabase (why pay twice?). Clerk if you need standalone auth with minimal setup.
Cost at different scales:
- 0-10,000 MAU: $0/month (Clerk free tier)
- 10,000+ MAU: $25/month (Clerk Pro)
Payments: Stripe or Lemon Squeezy ($0 platform fee + 2.9% + 30¢ per transaction)
Stripe is the default. No monthly fee. 2.9% + 30¢ per transaction. Handles subscriptions, invoices, tax calculation, SCA compliance, and disputes. Stripe Billing manages dunning (failed payment recovery) automatically.
You’ll spend 2-3 days integrating Stripe properly. Use their official SDKs (stripe-js for frontend, stripe-node for backend). Webhooks are mandatory for subscription state management — don’t skip this.
Lemon Squeezy is the merchant-of-record alternative. They handle all tax compliance (VAT, sales tax, GST) globally. You get paid, they deal with tax authorities. 5% + transaction fees (higher than Stripe, but zero tax headaches).
Lemon Squeezy works great for info products, courses, and simple SaaS. Less flexible than Stripe for complex billing (usage-based pricing, multi-seat plans, custom invoicing).
My choice: Stripe for SaaS with complex billing. Lemon Squeezy for simple subscription products where tax compliance is a nightmare (selling globally from day 1).
Cost at different scales:
- $1,000 MRR: ~$29 in Stripe fees (2.9% + 30¢ per transaction)
- $5,000 MRR: ~$145 in fees
- $10,000 MRR: ~$290 in fees
Email (Transactional): Resend or Loops ($0-20/month)
Resend is the new king of transactional email. Built by developers who were frustrated with SendGrid’s complexity. Free tier: 3,000 emails/month, 100 emails/day. That covers onboarding sequences, password resets, and notifications for your first 500 users.
Beautiful email templates with React components. No drag-and-drop builders. You write JSX, Resend renders perfect HTML. Deliverability is excellent (built on Amazon SES with smart sending infrastructure).
Paid tier at $20/month unlocks 50,000 emails/month. You’ll need this around 1,000-2,000 users.
Loops is the alternative if you want transactional + marketing email in one tool. Free tier: 2,000 emails/month. Event-based automation (user signs up → send welcome sequence). Clean API for triggering emails from your app.
Loops works great for SaaS where email is a core feature (e.g., digest emails, reports, alerts). Resend is better for pure transactional (password resets, invoices).
My choice: Resend for transactional email. Loops if you need transactional + light marketing automation in one tool.
Cost at different scales:
- 0-500 users: $0/month (Resend free tier)
- 500-2,000 users: $20/month (Resend paid tier)
- 2,000+ users: $20-50/month (usage-based)
Analytics: Plausible or PostHog ($0-9/month)
Plausible is privacy-friendly web analytics. No cookies, no GDPR popups, no bloated JavaScript. $9/month for 10,000 pageviews. Clean dashboard shows what matters: traffic sources, popular pages, bounce rate.
You don’t need Google Analytics. You need to know which marketing channels work and which pages convert. Plausible does this without tracking your users across the internet.
PostHog is the alternative if you need product analytics (event tracking, funnels, cohorts). Free tier: 1M events/month, unlimited users. Track button clicks, feature usage, conversion funnels.
PostHog is overkill for a landing page. It’s perfect for a SaaS product where you need to understand user behavior inside the app.
My choice: Plausible for marketing site analytics. PostHog for in-app product analytics. Use both (total cost: $9/month + $0 for PostHog free tier).
Cost at different scales:
- 0-10K pageviews: $9/month (Plausible)
- 10K-100K pageviews: $19/month (Plausible)
- 0-1M events: $0/month (PostHog free tier)
- 1M+ events: $0-50/month (PostHog usage-based)
Support: Plain or Crisp ($0-15/month)
Plain is customer support for developers. Free tier: unlimited tickets, 2 team members. Linear-style UI (keyboard shortcuts, command palette). Integrates with GitHub for bug reports. API-first (trigger support tickets from your app).
Plain is perfect for technical products where customers expect fast, smart support. Not ideal for non-technical audiences (no live chat widget, no canned responses).
Crisp is the alternative for broader audiences. Free tier: unlimited conversations, 2 team members, live chat widget. MagicReply AI suggests responses based on your knowledge base. Shared inbox, chatbot builder, CRM features.
Crisp is better for products with non-technical users who expect instant live chat support.
My choice: Plain for developer tools and technical SaaS. Crisp for broader audiences who expect live chat.
Cost at different scales:
- 0-500 users: $0/month (both have generous free tiers)
- 500-2,000 users: $0-15/month (still on free tiers or starter plans)
Total Monthly Cost Breakdown
Here’s what your stack costs at different stages:
0-100 customers (0-$2K MRR):
- Hosting: $0 (Vercel free tier)
- Database: $0 (Supabase free tier)
- Auth: $0 (Supabase Auth included)
- Payments: ~$60 in transaction fees at $2K MRR
- Email: $0 (Resend free tier)
- Analytics: $9 (Plausible)
- Support: $0 (Plain free tier)
- Total: $9/month + transaction fees
100-500 customers ($2K-$10K MRR):
- Hosting: $20 (Vercel Pro)
- Database: $25 (Supabase Pro)
- Auth: $0 (Supabase Auth included)
- Payments: ~$290 in transaction fees at $10K MRR
- Email: $20 (Resend paid tier)
- Analytics: $9 (Plausible)
- Support: $0 (Plain free tier)
- Total: $74/month + transaction fees
Your infrastructure cost is 0.7% of revenue at $10K MRR. That’s exceptional unit economics.
What This Stack Can’t Do (And When to Upgrade)
This stack breaks at scale. Here’s when you’ll outgrow each component:
Vercel: Bandwidth costs spike past 10K users. Migrate to AWS CloudFront or Cloudflare Workers ($50-200/month).
Supabase: Database size and query complexity hit limits past 5K users. Migrate to self-hosted Postgres on DigitalOcean or AWS RDS ($100-500/month).
Resend: Email volume hits limits past 10K users. Migrate to SendGrid or Amazon SES ($200-1K/month).
PostHog: Event volume explodes past 1M events/month. Migrate to Mixpanel or self-hosted PostHog ($200-1K/month).
But here’s the thing: if you’re hitting these limits, you’re past $50K MRR. You can afford to upgrade. Don’t over-engineer for scale you don’t have yet.
Common Mistakes Solopreneurs Make
Mistake 1: Picking tools for 10K users when you have 0. AWS is cheaper than Vercel at scale. But you’re not at scale. Vercel saves you 40 hours of DevOps work. That’s worth $2,000+ in opportunity cost.
Mistake 2: Building your own auth system. You’ll spend 2 weeks building what Clerk gives you for free. Then you’ll spend 6 months fixing edge cases (password resets, session management, OAuth bugs). Just use Supabase Auth or Clerk.
Mistake 3: Avoiding Stripe because “it’s complicated.” Yes, Stripe has a learning curve. But it’s the standard for a reason. Every payment processor you meet will expect Stripe integration. Every investor will ask about Stripe revenue data. Learn it once, use it forever.
Mistake 4: Skipping analytics because “I’ll add it later.” You need to know which marketing channels work from day 1. Install Plausible before launch. It takes 5 minutes.
Mistake 5: Using free email from Mailchimp/SendGrid. Deliverability on free tiers is terrible. Your onboarding emails land in spam. Pay $20/month for Resend or Loops. It’s the best $20 you’ll spend.
When NOT to Use This Stack
This stack doesn’t work for:
- Real-time collaboration apps: (Google Docs, Figma clones) — You need WebSockets infrastructure, operational transforms, and CRDT libraries. Use Liveblocks ($0-99/month) or Partykit ($0-49/month).
- Video/audio processing: (Zoom clones, podcast editors) — You need dedicated media servers. Use Agora ($0-500/month) or Daily.co ($0-99/month).
- High-frequency trading/gaming: — Latency matters. You need dedicated servers, not serverless. Use DigitalOcean Droplets ($24-192/month).
- Enterprise B2B with SOC2 requirements: — You need audit logs, SSO, dedicated instances. Use AWS or GCP from day 1 ($500-5K/month).
For everything else — SaaS tools, marketplaces, content platforms, AI wrappers — this stack works.
My Recommendation: Start Here, Scale Later
Your first 100 customers don’t care about your infrastructure. They care about whether your product solves their problem.
Use this stack to ship fast:
- Vercel for hosting
- Supabase for database + auth
- Stripe for payments
- Resend for email
- Plausible for web analytics
- PostHog for product analytics
- Plain or Crisp for support
Total cost: $9-74/month for your first $10K MRR. That’s 0.7% of revenue going to infrastructure. The rest goes to growth.
When you hit scale problems, you’ll have revenue to solve them. Until then, ship fast and cheap.
