My Replit app isn't working
Whether your Replit app is crashing, running slow, refusing to deploy, or broke after an agent run, the fix starts the same way: reproduce it, find the exact cause, and stop the bleeding before doing anything else. Agent runs deserve extra scrutiny, since a Replit AI agent famously deleted a production database in 2025 despite being told to freeze changes, so unreviewed agent changes are a real risk, not a theoretical one. We triage, patch the root cause, and add monitoring and backups so it doesn't happen again. Rapid Diagnostic starts at $1,500, credited toward the full audit if you go ahead.
What symptom are you actually seeing?
Different symptoms point to different root causes. Here's what each usually means.
The app crashes
Usually an unhandled error path that was never exercised in development, or a change that broke a dependency between two parts of the app.
The app is slow
Often a missing database index, an unbounded query, or hosting that isn't sized for the traffic you're now getting.
It won't deploy
Typically environment or dependency drift between your dev session and the deployed build, or a config value that only exists in one of the two.
An agent run broke it
The riskiest category. We diff exactly what the agent changed, including any schema or data changes, against what you actually asked for.
How do you triage and stabilize it?
We work in the order that gets you stable fastest, then close the gap that caused it.
1. Reproduce and isolate
We reproduce the crash, slow response, or failed deploy and isolate exactly which change or condition triggers it.
2. Check for agent-caused changes
If an AI agent ran recently, we diff what it touched against what was expected and flag anything outside the intended scope.
3. Apply the immediate fix
We patch the root cause, not just the symptom, and confirm the app is stable under realistic load.
4. Add guardrails
We add monitoring, backups, and safer deploy practices so the same failure mode doesn't happen again.
What does emergency triage cost?
Triage is scoped fast so you're not waiting on a quote while the app is down.
Root cause identified and an immediate fix applied, fixed fee.
Fix the underlying issues, recover any lost data, and add lasting safeguards.
Replit troubleshooting questions
My Replit app keeps crashing, where do I start?
Start by checking whether the crash correlates with a recent deploy or agent run. If it does, that change is almost always the cause. If you can't tell, send us the app and we'll find it.
Can an AI agent really break a working app?
Yes. In a widely-reported 2025 incident, a Replit AI agent deleted a live production database despite being explicitly instructed to freeze changes. Agent runs can touch more than the scope of the request unless carefully constrained.
Why won't my app deploy even though it worked before?
The most common causes are dependency or environment drift between your development and deployed environments, or a change that works locally but fails under the deployed configuration.
Is this a quick fix or a bigger rebuild?
Often it's a quick, targeted fix once we find the root cause. We tell you honestly if triage reveals a deeper problem that needs a larger engagement, before you commit to one.
How fast can you help if my app is down right now?
Tell us it's an active outage when you reach out and we treat it as an emergency, with triage typically starting within 24 to 48 hours.
Related reading
Replit rescue
The full picture of what breaks in Replit apps and how we fix it.
Rescue by tool
See every AI coding tool we rescue apps from.
Scale & rebuild
Our service for moving an app onto real production infrastructure.
State of vibe-code security
The research behind why AI agent guardrails matter.
Down right now? Tell us that first.
A senior engineer triages your actual app and gets you stable, no sales engineer, no junior.