Know when your users struggle
Keystone is the B2B observability platform that shows you exactly what's happening for each account. See who's struggling, why, and fix it before they email you.
Built for B2B teams who can't afford to lose a pilot
Backed by
Founders of:
Investors like:
Operators from:
WHAT YOU GET
Your AI maintenance crew
Stop finding out about bugs from angry customer emails. Keystone watches every account 24/7 and tells you the moment something breaks—with full context to fix it.
See account health at a glance
Every account gets a health score based on errors, failed requests, and frustration signals. Red accounts need attention. Green accounts are happy. No more guessing.
HEALTH
001
Understand what actually happened
Not just "error at line 42"—see the full story. What the user did, what state they had, what broke, and why. AI summarizes every session so you don't read logs.
CONTEXT
002
Fix it before they notice
Click any issue, get full context hydrated in Cursor or Claude Code. Know if it's already fixed in main. Ship the fix before your customer opens a support ticket.
FIX
003
How it works
One platform. Every account.
Keystone captures what's happening across your product and organizes it by customer—so you see the accounts that matter, not aggregate noise.
What Sentry shows you
Aggregate metrics across all users. "You had 847 errors today." No way to know which customers are affected or how badly.
847 total errors today across all users
What Keystone shows you
Health per account. "Acme Corp (your $50k pilot) hit 5 errors during their eval. Here's exactly what happened."
THE DETAILS
Built for B2B from day one
Five lines of code
Install our SDK, pass in accountId and userId. We capture errors, network requests, user actions, and AI calls. Runs async, zero latency. Works with React, Node, Python.
AI-powered session replay
Not video playback—intelligent summaries. "User clicked Export, got a timeout on /api/pdf, retried twice, then left." See the exact state, the exact error, the exact moment.
VIP alerts in Slack
Mark your top accounts. When something breaks, you know in 60 seconds. The alert includes: who, what they were doing, what broke, and a link to the full session.
"Is this fixed in main?"
Before you panic, Keystone checks if a recent PR already addressed the issue. If not, click to open the fix flow with full context—error, code, user state, similar past issues.
Really easy to start
Just four steps. No infrastructure changes. Start seeing account health today.
Install SDK
Five lines. Tag sessions by account.
Connect GitHub
We learn your codebase and recent changes.
Mark VIP accounts
Tell us which customers matter most.
Get alerts
Know when VIPs struggle, fix before they email.
Stop finding out about bugs from customer emails
Your biggest accounts deserve better than aggregate error rates. See exactly what's happening, account by account.