Backend
Supabase
Postgres + Auth + Storage. Free tier handles up to ~1000 users.
github.com/supabase/supabaseAll audience stacks
Curated for startups
Open-Source for Startups
The open-source stack for early-stage startups in 2026. Every tool below has a generous free tier or self-host option. You can run a full SaaS company on this stack for under $50/month until you hit real revenue.
Frontend
Next.js
React framework with App Router. Vercel free tier covers most early-stage apps.
github.com/vercel/next.jsUI
shadcn/ui
Copy-paste components. Own the code, no npm dependency to break.
github.com/shadcn-ui/uiCRM
Twenty
Modern OSS CRM. Self-host for $0/month vs Hubspot's $1500/year minimum.
github.com/twentyhq/twentyEmail marketing
Listmonk
Self-hosted newsletter. ~$5/mo for 100k subscribers vs Mailchimp's $300+.
github.com/knadh/listmonkAnalytics
Plausible
Privacy-first, cookie-free. $9/mo for the cloud (or self-host free).
github.com/plausible/analyticsScheduling
Cal.com
Calendly replacement. Free for solo founders, OSS for teams.
github.com/calcom/cal.comAutomation
n8n
Zapier replacement with code nodes. Self-host for unlimited workflows.
github.com/n8n-io/n8nTeam chat
Mattermost
Slack replacement with full message history (Slack free = 90 days only).
github.com/mattermost/mattermostDocs/Wiki
Outline
Clean team wiki. Self-host or use the affordable cloud.
github.com/outline/outlineFull curated directory + bundles
Lifetime gives you 100+ open-source tools with curator takes, 13 stack bundles, and 12 skill tracks. ₹99 once.
See pricing