$0 Launch Stack — Free Tools Guide

You Don't Need Money to Launch a SaaS

The biggest myth in the startup world is that you need money to build software. In 2026, you can build, launch, and scale a SaaS product to your first $1,000 in monthly revenue without spending a single dollar on tools or infrastructure. Every layer of the modern SaaS stack — from development to hosting to payments to analytics — has a generous free tier that's more than enough for a launching product.

This isn't about cutting corners. These aren't toy tools. Vercel's free tier hosts production applications serving millions of requests. Supabase's free tier includes a full PostgreSQL database with authentication. Stripe doesn't charge you anything until you're actually making money. The "zero cost" stack in 2026 is genuinely production-grade.

Here's the complete toolkit, layer by layer.

Development: Building Your App

AI App Builder: Jetpack by GenAI Labs (Free Tier)

Jetpack lets you describe your SaaS idea in plain English and generates a complete, working application — frontend, backend, database schema, authentication, and deployment configuration. The free tier gives you enough generations to build and iterate on your MVP. This alone replaces what used to require weeks of developer time.

Code Editor: VS Code (Free)

Visual Studio Code is the industry-standard code editor, completely free. With AI-powered extensions like GitHub Copilot (free for individual developers), you get intelligent code completion that accelerates your development significantly. For any manual code adjustments after AI generation, VS Code is your workspace.

Version Control: GitHub (Free)

GitHub's free tier includes unlimited public and private repositories, GitHub Actions for CI/CD (2,000 minutes/month), and GitHub Pages for documentation. Every serious software project should be in version control from day one, and GitHub makes it effortless.

Database: Storing Your Data

Supabase (Free Tier)

Supabase is the go-to choice for modern SaaS databases. The free tier includes:

• Full PostgreSQL database (500 MB storage)
• Built-in authentication (email, OAuth, magic links)
• Real-time subscriptions
• Storage for file uploads (1 GB)
• Edge Functions for serverless compute
• Auto-generated REST and GraphQL APIs

For a launching micro SaaS, 500 MB of database storage handles thousands of active users. You won't hit the limits until you're making enough money to afford the paid plan.

Alternative: Turso (Free Tier)

If you prefer SQLite-based databases with edge replication, Turso offers a generous free tier with 9 GB storage and 500 databases. It's lightning fast and perfect for applications where read speed matters most.

Authentication: User Management

Supabase Auth (Included Free)

If you're using Supabase for your database, auth is included. It supports email/password, magic links, phone auth, and social logins (Google, GitHub, Apple, etc.). It handles session management, token refresh, and password resets out of the box.

Alternative: Clerk (Free Tier)

Clerk offers a polished authentication experience with up to 10,000 monthly active users on the free tier. It provides pre-built UI components for sign-in, sign-up, and user management that look professional without any design work.

Alternative: Auth.js (Free, Open Source)

For Next.js projects, Auth.js (formerly NextAuth) is a free, open-source authentication library that supports dozens of OAuth providers. You host it yourself, so there are no user limits — just your server capacity.

Hosting: Getting Your App Online

Vercel (Free Tier)

Vercel's free tier is remarkably generous for SaaS applications:

• Unlimited static sites and serverless functions
• 100 GB bandwidth per month
• Automatic HTTPS and CDN
• Preview deployments for every git push
• Edge functions for globally distributed compute
• Built-in analytics

Most micro SaaS products never exceed Vercel's free tier limits. It handles thousands of daily active users without breaking a sweat.

Alternative: Netlify (Free Tier)

Similar to Vercel, Netlify offers 100 GB bandwidth, 300 build minutes/month, serverless functions, and form handling on the free tier. It's excellent for Jamstack architectures.

Alternative: Railway (Free Tier)

If you need a traditional server (Express.js, Django, etc.), Railway provides $5/month in free credits — enough for a lightweight backend. It supports Docker containers, PostgreSQL, Redis, and automatic deployments from GitHub.

Payments: Making Money

Stripe (Pay-as-You-Go)

Stripe charges nothing upfront. You only pay when you make money: 2.9% + $0.30 per transaction. For a $29/month subscription, that's about $1.14 per charge — a cost you can easily absorb. Stripe provides:

• Subscription billing with automatic renewals
• Customer portal for plan management
• Invoicing and receipts
• Tax calculation (Stripe Tax)
• Fraud prevention
• Extensive API and webhooks

Alternative: Lemon Squeezy (Pay-as-You-Go)

Lemon Squeezy acts as a Merchant of Record, handling sales tax, VAT, and compliance globally. At 5% + $0.50 per transaction, it's pricier than Stripe but eliminates the headache of tax compliance entirely. For solo founders selling globally, this simplicity is often worth the extra cost.

Email: Communicating with Users

Resend (Free Tier)

Resend offers 3,000 emails/month and 100 emails/day on the free tier. Built by the creator of React Email, it provides a modern developer experience with beautiful transactional email templates. Perfect for password resets, welcome emails, and weekly digests.

Alternative: Loops (Free Tier)

Loops offers 1,000 contacts on the free tier and is designed specifically for SaaS email. It handles transactional emails, drip campaigns, and product update broadcasts in one platform.

Analytics: Understanding Your Users

Plausible Community Edition (Free, Self-Hosted)

Plausible is a privacy-focused analytics tool. The self-hosted community edition is completely free and gives you pageviews, referrers, and user behavior without cookies or GDPR consent banners. Deploy it on Railway or any Docker-compatible platform.

Alternative: PostHog (Free Tier)

PostHog's free tier is absurdly generous: 1 million events/month, session recordings, feature flags, and A/B testing. For a micro SaaS, you'll have product analytics that rival what enterprise companies pay thousands for.

Alternative: Umami (Free, Self-Hosted)

Another excellent self-hosted analytics option. Umami is lightweight, privacy-focused, and provides all the core metrics you need. Deploy it alongside your app on Railway or Vercel.

Domain and DNS

Cloudflare (Free Tier)

You'll need a domain name ($10-15/year from Cloudflare Registrar — the one cost that's hard to avoid). But Cloudflare's DNS, CDN, DDoS protection, and SSL are all free. It also provides:

• Cloudflare Workers (100,000 requests/day free)
• Cloudflare R2 storage (10 GB free)
• Cloudflare Pages (unlimited sites)

Monitoring and Error Tracking

Sentry (Free Tier)

Sentry's free tier includes 5,000 errors/month and performance monitoring. When your SaaS has a bug, Sentry tells you exactly what happened, in which browser, for which user. Essential for maintaining quality without a QA team.

Better Stack (Free Tier)

Uptime monitoring with 10 monitors, 3-minute check intervals, and incident alerts via email and Slack. Know when your app goes down before your users tell you.

Customer Support

Crisp (Free Tier)

Crisp offers a free live chat widget with two seats, a shared inbox, and a basic knowledge base. For a solo founder handling support directly, this is more than enough. Add it to your app with a single script tag.

The Complete $0 Stack

Putting it all together, here's your zero-cost SaaS stack:

• Build: Jetpack by GenAI Labs (AI generation) + VS Code (editing)
• Database + Auth: Supabase
• Hosting: Vercel
• Payments: Stripe (pay only when you earn)
• Email: Resend
• Analytics: PostHog
• Monitoring: Sentry + Better Stack
• Support: Crisp
• DNS/CDN: Cloudflare
• Version Control: GitHub

Total monthly cost: $0 (excluding your domain name). Total capability: a production-grade SaaS that can serve hundreds of paying customers.

When You'll Need to Start Paying

Free tiers aren't infinite, but they're designed to carry you through the startup phase. Here's roughly when you'll hit limits:

• Supabase: Around 500 MB of data or heavy real-time usage → ~$25/month
• Vercel: When you need team collaboration or exceed bandwidth → $20/month
• Resend: Over 3,000 emails/month → $20/month
• PostHog: Over 1 million events → usage-based pricing

By the time you're hitting these limits, you should be generating hundreds or thousands in monthly revenue. The tools scale with your business, not ahead of it.

Stop Waiting, Start Building

There has never been a lower barrier to launching a SaaS business. The tools are free. The knowledge is freely available. AI has eliminated the technical complexity. The only investment required is your time and effort.

Open Jetpack, describe the SaaS you want to build, deploy it to Vercel, connect Stripe, and you're in business. Literally. The entire stack described in this article can be set up in a single afternoon.

The $0 to launch era is here. The question isn't whether you can afford to start — it's what you're going to build first.