Best SaaS Stack for SaaS Companies (2026)

Q: What tools does a SaaS company need to launch?

To launch a SaaS product, you need: version control (GitHub), hosting and deployment (Vercel or AWS), a database (Supabase or PlanetScale), authentication (Clerk or Auth0), payment processing (Stripe), error tracking (Sentry), and analytics (PostHog). All of these have free tiers that cover you through your first 1,000 users.

Q: How much does infrastructure cost for a SaaS startup?

A SaaS startup can run on $0/month until reaching significant scale. Free tiers from Vercel, Supabase, GitHub, Stripe (pay-per-transaction only), PostHog, and Sentry cover most early-stage needs. Costs typically start at $50-200/month when you exceed free tier limits around 1,000-5,000 monthly active users.

Q: Should SaaS companies build or buy internal tools?

Buy almost everything except your core product. Building internal tools like billing, auth, analytics, or support systems wastes engineering time that should go toward your product. Use Stripe for billing, Clerk for auth, PostHog for analytics, and Intercom for support. Only build custom when off-the-shelf tools genuinely cannot handle your specific requirements.

By ToolVS Research Team · Last Updated April 2026

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30-Second Answer

The best SaaS company stack: GitHub for code, Vercel for hosting, Supabase for database + auth, Stripe for billing, PostHog for analytics, Sentry for error tracking, Linear for project management, and Intercom for support. Budget stack: $0/month on free tiers. Premium for 10 devs: $723/month.

Recommended Stack

Category	Tool	Price	Why This One
Version Control	GitHub	Free / $4/user/mo	Industry standard, Actions CI/CD, Copilot, code review
Hosting	Vercel	Free / $20/user/mo	Zero-config Next.js, edge functions, preview deploys, analytics
Database + Auth	Supabase	Free / $25/mo	Postgres, auth, real-time, storage, edge functions in one
Billing	Stripe	2.9% + 30c per txn	Best subscription billing, usage-based pricing, invoicing, portal
Analytics	PostHog	Free (1M events/mo)	Product analytics, feature flags, A/B tests, session replay
Error Tracking	Sentry	Free (5K errors/mo) / $26/mo	Real-time error tracking, performance monitoring, stack traces
Project Management	Linear	Free / $8/user/mo	Built for dev teams, keyboard-first, cycles, GitHub sync
Customer Support	Intercom	From $39/seat/mo	In-app messaging, chatbot, help center, product tours
Communication	Slack	Free / $8.75/user/mo	Standard for internal comms, 2,600+ integrations
Documentation	GitBook	Free / $8/user/mo	Beautiful docs from Git repos, API references, versioning

Total Monthly Cost

Budget Stack (Pre-launch)

$0/month

Every tool on this list has a free tier. GitHub Free + Vercel Free + Supabase Free + Stripe (pay-per-use) + PostHog Free + Sentry Free + Linear Free + Slack Free + GitBook Free. Scale as revenue grows.

Premium Stack (10 users)

$723/month

GitHub Team ($40) + Vercel Pro ($20) + Supabase Pro ($25) + Sentry Team ($26) + Linear ($80) + Intercom ($39) + Slack Pro ($87.50) + GitBook ($80) + PostHog Free + Stripe pay-per-use.

Integration Compatibility

GitHub + Linear + Vercel: The holy trinity. Push to GitHub triggers Vercel deploy. Linear issues link to GitHub PRs. Commits auto-update Linear status.

Sentry + Vercel: One-click integration. Errors include source maps, deployment context, and affected users.

Stripe + Supabase: Webhook-driven sync. Subscription changes update your database in real-time via edge functions.

Intercom + Slack: Support conversations flow into Slack channels. Engineers can jump in without leaving Slack.

PostHog + everything: One JavaScript snippet captures analytics, session replay, and feature flags. Works with any framework.

Frequently Asked Questions

What tools does a SaaS company need to launch?

Version control (GitHub), hosting (Vercel), database + auth (Supabase), payments (Stripe), error tracking (Sentry), and analytics (PostHog). All have free tiers covering your first 1,000 users.

How much does infrastructure cost for a SaaS startup?

$0/month until significant scale. Free tiers from Vercel, Supabase, GitHub, and PostHog cover early-stage needs. Costs start at $50–$200/month around 1,000–5,000 MAUs.

Should SaaS companies build or buy internal tools?

Buy almost everything except your core product. Use Stripe for billing, Clerk/Supabase for auth, PostHog for analytics. Only build custom when off-the-shelf genuinely cannot handle your requirements.

Build your custom stack

Use our SaaS Budget Calculator to estimate your actual monthly cost, or take the Tool Finder Quiz for personalized recommendations.

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Last updated: April 13, 2026. Pricing verified monthly.