The Error Tracker That Hates Your Code.
Stop ignoring silent failures. Grumpy tracks your bugs, analyzes your crashes, and publicly roasts your team in Slack until you actually fix them.
[CRITICAL] [Billing API] TypeError
GRUMPY SAYS:
You passed null to a function that requires a string. Again. Are you okay? I would tell you to check line 42, but I know you won't.
Code Context:
40: def process_payment(user_id: str):
41: user = get_user(user_id)
42: stripe.Charge.create(
customer=user.stripe_id
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Simple as it gets
Three steps. Two lines of code.
Install the SDK
pip install grumpy-ai (or npm i desicon-grumpy) and drop two lines into your app. Done. No config files, no YAML nightmares.
Grumpy Watches
Every crash gets intercepted and analyzed by AI in real-time. Dependency bugs are separated from app bugs, and the Rescue Engine can auto-deploy fixes before your next visitor.
Get Alerted
Rich, contextual alerts land in Slack or Discord — in the persona your team prefers — with the exact code that broke, why it broke, and how to fix it.
Beat the Bot. Get Paid.
We don't just report bugs; we incentivize writing good code. If your team can survive 30 consecutive days without triggering a single unhandled exception, your next month of Grumpy is completely free. We dare you.
- Tracked automatically per project.
- Promotes a culture of stability.
- Zero manual claims—billing updates instantly.
Everything you need
Zero Config. High Impact.
- Zero-Config Setup.
Two lines of code. That is literally all it takes for us to start judging your architecture. Drop the SDK in your app and let the roasting begin.
- The Regression Engine.
If you "fix" a bug and it comes back the next day, Grumpy flags it as a regression and pings your Slack again to publicly shame you.
- Bring Your Own Key (BYOK).
We handle the ingestion, routing, and dashboards. You plug in your own OpenAI API key so we don’t have to pay for your tokens.
- The Grumpy Rescue Engine.
When your code crashes in production, Grumpy uses AI to generate and deploy a targeted fix so every future visitor is protected instantly.
- The Sensitivity Dialer.
Turn the dial from "Only Wake Me Up For Fatal Crashes" to "Warn Me About Every Single Deprecation Notice". You control the volume.
- Instant AI Triage.
When it crashes, we walk up the stack trace, grab the context, and pass it to OpenAI to tell you exactly how you messed up.
- Omnichannel & Omnipresent.
Grumpy pushes these rich, AI-analyzed alerts directly into the channels your developers already live in—Discord and Slack.
Zero-Downtime Hotfixes
The Grumpy Rescue Engine
Stop bleeding revenue while waiting for CI/CD. Grumpy intelligently intercepts unhandled exceptions and safely resolves them at runtime, automatically deploying a seamless fix to all clients instantly.
Patch Applied (Memory)
window.paymentAPI.submit = function(amount) {
// Grumpy: Fixing your mess. Casting string to int.
return originalSubmit(parseInt(amount, 10));
};- Fixes the Root Cause, Not Just the Symptom.
- Our AI engine intelligently interprets the user's intent and permanently resolves the broken logic so the workflow actually succeeds.
- Ironclad Security Guarantees.
- The engine is strictly isolated from your databases, networks, and sensitive user data.
- Instant Global Distribution.
- Every future visitor instantly benefits from the fix, eliminating downtime while you sleep.
Pricing that hurts, a little.
Choose the tier that matches how much you hate your code.
Start your free month. No credit card required.
Hobby
For side projects that will never launch.
$5/mo
- 5 Projects
- 1 User Included
- Regression Engine
- Slack & Discord Integrations
- Grumpy Persona
- 30-Day Streak Challenge
Pro
For the dev who actually ships to production.
$10/mo
- 10 Projects
- 1 User Included
- Regression Engine
- Grumpy Rescue Engine
- Sensitivity Dialer
- Slack & Discord Integrations
- Unlock Personas, "fire Grumpy"
- 30-Day Streak Challenge
Team
Share the blame, roast your entire team
$20/mo
- 20 Projects
- 2 Team Users Included
- Additional $10/user, $1/project
- Regression Engine
- Grumpy Rescue Engine
- Sensitivity Dialer
- Slack & Discord Integrations
- Unlock Personas, "fire Grumpy"
- 30-Day Streak Challenge
For Maintainers
"Not My Fault" Mode
Grumpy automatically isolates bugs caused by third-party packages, instantly clearing the developer's name and alerting the maintainer with exact stack traces.
- Actionable Bug Reports.
- Maintainers get exact stack traces, not vague GitHub issues.
- 100% Opt-In.
- You have full control. Maintainers are only notified if you explicitly enable it.
- Vendor Dashboard.
- Track the health of your packages.
Email Preview:
"Hey there, Grumpy.ai tracked 150 crashes in the last 24 hours tracing back to your package `axios`. The developer is taking the blame for it. Claim your free Vendor account to see the exact stack traces and fix the bug."
Loved by developers who hate their code.
We just launched, so these reviews are currently 100% fake. But this is exactly what we hope you'll say about us.
“Grumpy caught a null pointer I'd been ignoring for 6 months. It called me out in front of the whole team. I deserved it.”
“I set the sensitivity to 'warning' as a joke. 47 Slack messages later, I'm a better developer. Send help.”
“We hit a 30-day streak and got a free month. Our VP of Engineering printed the certificate and framed it.”
“The AI told me my try-catch was 'the code equivalent of putting a band-aid on a gunshot wound.' It was right.”
“Replaced Sentry with Grumpy. Our mean time to resolution dropped 40% because no one wants to be roasted twice.”
“My AI code editor autocompleted a disaster. Grumpy found it in 12 seconds and roasted both me and the AI. Fair enough.”
“I thought my code was clean. Grumpy disagreed in three languages. I have never been more humbled by a Python script.”
“It’s like having a senior engineer constantly breathing down your neck, but without the coffee breath. 10/10.”
“I tried to turn it off after it found a memory leak I caused. It pinged the #engineering channel to tell everyone I was trying to silence it.”
Frequently Grumpy Questions
Questions we get asked. Repeatedly. By people who didn't read the docs.
Ready to get roasted?
Your first month is completely free. No credit card required. Just your pride, which we will systematically dismantle one exception at a time.
Seamlessly Works
on your favorite frameworks and languages. Grumpy doesn't discriminate.