Real-time events
Sub-second ingestion with idempotency, retry, and per-key quotas — built for production scale.
Stack unifies events, sessions, and revenue into one workspace. Set up in 4 minutes — no SDK rewrites required.
Works with your stack
Sub-second ingestion with idempotency, retry, and per-key quotas — built for production scale.
Step-by-step funnels, retention curves, and cohort breakdowns without writing a single SQL query.
Drop-in clients for Node, Next, Remix, Cloudflare Workers, and React Native. No proxy required.
How it works
Add our lightweight client with a single npm install. Under 4 KB gzipped, zero dependencies.
Call stack.track() anywhere in your code. Events stream in real-time to your dashboard.
Build funnels, set alerts, and share live dashboards with your team — no SQL required.
Stack replaced three tools in our data stack. The real-time funnels alone justified the switch.
14-day trial. SOC 2 from day one. Free for hobby projects, forever.
Start with Stack