Every founder asks us 'what tools should we use?' Here's the 12 we put on every project in 2026. Not 'best of'. The ones that consistently get out of the way and let you ship.
The 12 tools
Clerk - auth
Drop-in user, org, team management with SSO/SCIM ready when you need it. $0 to start, $25/month per 1K MAU at scale. Beats building auth in every dimension.
Stripe - billing
Subscriptions, usage billing, customer portal, tax. Adyen and Paddle exist but Stripe still has the best DX.
Resend - transactional email
$0 to start, $20/month for serious volume. Cleaner API than SendGrid, better deliverability than Mailgun.
PostHog - product analytics + feature flags + session replay
One tool replaces Mixpanel + LaunchDarkly + Hotjar. Free up to 1M events/month. Self-hostable if you need it.
Vercel - hosting
$20/month covers most early-stage apps. Auto-deploy, edge network, preview URLs. Switch to AWS at $10K+ MRR if cost matters.
Linear - issue tracking
Faster than Jira. Free for small teams. The keyboard shortcuts alone are worth it.
Sentry - error tracking
Free tier covers most apps. Catches errors users don't report. Non-negotiable from day 1.
Cursor - code editor
VS Code with built-in AI coding. We ship 30-40% faster on Cursor than VS Code. $20/month per dev.
Plain - customer support
Beats Intercom for B2B. Linear-style UI, built for engineering-led teams. $0 to start.
Drata or Vanta - compliance automation
$10-15K/year. Replaces a $150K compliance hire. Run from day 1 if you'll ever sell to enterprise.
Cal.com - meeting scheduling
Calendly clone with better DX and self-hostable. $12/month/user.
Loom - async video
Replaces 50% of meetings. $15/month/user. Especially valuable for distributed teams.
- Auth0: Got expensive after Okta acquisition. Clerk is cleaner and cheaper for SaaS.
- Mixpanel: PostHog does everything Mixpanel does, plus session replay, plus feature flags, plus is free.
- Jira: Slow. Bloated. Linear or GitHub Projects beat it for any team under 100 engineers.
- HubSpot for early-stage CRM: Overkill until you have a real sales team. Use a Notion database or Attio.
"The boring stack wins. Save your innovation budget for the actual product."
Stack cost by stage
| Stage | Monthly tooling cost | Replaces |
|---|---|---|
| Pre-revenue | $200/mo | 1+ engineer |
| $10K MRR | $1.2K/mo | 2-3 hires |
| $1M ARR | $8K/mo | 5+ hires |
| $10M ARR | $25K/mo | 10+ hires |
What we DON'T recommend in 2026
Auth0
Got expensive after Okta acquisition. Clerk is cleaner and cheaper for SaaS.
Mixpanel
PostHog does everything Mixpanel does, plus session replay, plus feature flags, plus is free at scale.
Jira (under 100 engineers)
Slow. Bloated. Linear or GitHub Projects are better for any team under 100 engineers.
HubSpot for early-stage CRM
Overkill. Notion database or Attio until you have a real sales team.
We ship MVPs on this exact stack in 10-14 weeks.
Auth, billing, admin, email, analytics - all live on day one.
Lean SaaS tooling rules
- Buy primitives. Build differentiation.
- Pick proven tools. Innovate on the actual product.
- Standardise across your team - reduces onboarding by weeks.
- Re-evaluate yearly, not monthly. Tool churn is its own tax.
The boring stack wins
Founders waste months evaluating tools. Here's the secret: the boring stack wins. Pick proven tools that get out of your way. Save your innovation budget for the actual product.
Every tool above has been battle-tested by us across 50+ engagements in 2026. Use them, ship faster, and stop researching.
The IRPR engineering team ships production software for 50+ countries. Idea → Roadmap → Product → Release. 200+ products live.
About IRPR