The issue stays primary
Most tools make you search for the problem. FaultLens starts with it: the production issue that needs explaining, not a broad telemetry hunt.
Production issue diagnosis
Find what changed before your team loses the first 30 minutes.
When production breaks, the first half-hour disappears into Slack threads, git blame, and whatever the last engineer remembers about the deployment. FaultLens keeps errors, releases, environments, and issue context connected in one investigation trail so your team can act instead of reconstruct.
Request access. If FaultLens fits your workflow, we will reach out with guided onboarding.
Fewer tools in the loopContext stays connectedShorter path to actionBuilt for SaaS engineering teams
IssueProduction failure anchor
ReleaseChange context attached
EnvironmentRuntime diff visible
Next actionStays in the same path
Live product viewDashboard command center with issue pressure, releases, environments, and alert health in one place.
AlertStart from the production issue that needs explaining, not a blank search across tools.
ContextKeep release, environment, stack, and notes beside the issue while the team investigates.
ActionLeave with the next useful check and a trail the next engineer can understand.
Why FaultLens exists
The investigation trail breaks down when context lives somewhere else.
The first 20 minutes of a production incident often disappear into Slack, git blame, and whatever the last engineer remembers about the deployment. FaultLens keeps that context attached to the issue before the team has to reconstruct it by hand.
What changes in practice
Less tab churnThe issue remains the anchor while release and environment clues stay nearby.
Faster context handoffThe next engineer sees the trail instead of inheriting a half-remembered story.
Clearer next actionDiagnosis ends with a direction, not another search loop.
Context stays attached
Release changes, environment differences, and investigation notes stay near the issue instead of being rebuilt from memory and scattered tabs each time.
Focused beats sprawl
We'd rather do one thing well than build a platform that does everything badly. FaultLens is intentionally narrower so the path to a diagnosis is shorter.
How FaultLens works
One investigation trail. No scattered tabs to close at the end.
Start with the issue. Pull in what changed. Check the environment. Leave with a clear next action. The whole path stays in one place so the team does not have to piece the story together again.
01
Issue
A production error appears. Do not start a search. Open the issue that needs explaining and stay anchored to it.
02
Release
Bring recent deployment history into the same view while the issue is still in front of you. See what changed without switching tools.
03
Environment
Check runtime differences before the diagnosis drifts. Production vs staging. EU vs US. Keep the signal close to the issue.
04
Next action
Leave knowing what to check next, not with a pile of half-closed tabs and a Slack thread to re-read tomorrow.
AnchorThe issue never loses priority.
The workflow begins with the production problem that needs explaining, not a hunt across dashboards.
Connected contextRelease and environment clues stay near the issue.
Teams can see what changed and where it changed without reconstructing the path from memory.
Operational outcomeThe investigation ends with a clearer next action.
That makes handoff easier and repeat incidents easier to understand when they happen again.
Release evidence gets enough room to be readable while keeping the deployment and issue story connected.
Explore FaultLens
Start from the problem your team is trying to solve.
Some teams come to FaultLens from error monitoring. Others arrive after a release-related incident where the trail was too scattered. These paths keep the next step practical.
What FaultLens helps with
Understand the focused product areas before going deep into SDK setup.
Integrate where failures happen
Review runtime-specific guidance for backend, frontend, and SaaS application teams.
Learn the product shape
Use the overview and docs when you need a quick product definition or implementation path.
Integration
FaultLens supports any platform.
Use an official SDK where available, or integrate directly using the HTTP ingestion API. Official SDKs cover .NET, TypeScript / JavaScript, React, and Angular. Every other language and runtime sends the same event envelope to the same endpoint. Sample repositories let you validate a working integration before wiring your own application.
Available.NET
FaultLens.SDK
NuGet package for .NET applications. Captures exceptions, breadcrumbs, release, environment, and request context without interrupting application flow.
dotnet add package FaultLens.SDKAvailableTypeScript / JavaScript
@faultlenshq/browser
JavaScript browser SDK for capturing client-side errors with route, referrer, user agent, user ID, and tag context.
npm install @faultlenshq/browser@1.0.0AvailableAngular
@faultlenshq/angular
Angular error handler package built on top of the browser SDK. Captures Angular-specific diagnostics context with provideFaultLens and FaultLensService.
npm install @faultlenshq/angular@1.0.0 @faultlenshq/browser@1.0.0AvailableReact
@faultlenshq/react
React SDK with provider, hook, and ErrorBoundary APIs on top of the browser SDK. Supports React 18 and React 19 applications.
npm install @faultlenshq/react@1.0.0 @faultlenshq/browser@1.0.0Any platformHTTP
Direct HTTP API
No official SDK for your stack? POST the canonical event envelope from Java, Python, Go, PHP, Ruby, Rust, C++, or any runtime that can make an authenticated HTTPS request. Same endpoint and same contract as the SDKs.
POST /api/events/ingestPricing
Transparent pricing for focused production diagnosis.
Starter and Growth are the public paid plans. Activation is confirmed with the FaultLens team. Talk to us directly at hello@faultlens.in and we will reply within one business day.
Free Trial
14 days
5,000 events7-day retention
Validate FaultLens in a real production diagnosis workflow before moving to a paid plan.
Request trial →Starter
₹1,999/month
- 75,000 events/month
- 15-day retention
- Release and environment-aware investigation
- Shared triage and issue ownership
- No seat, project, or environment caps
Growth
₹4,999/month
- 250,000 events/month
- 30-day retention
- Broader triage and ownership workflow
- Durable investigation history and context
- More room for team rollout as usage grows
- No seat, project, or environment caps
Custom
Contact
Higher event volume, longer retention, broader rollout planning, or advanced commercial handling. One direct contact path.
Contact sales →Security
Built with practical SaaS security fundamentals.
Tenant-scoped workspacesEach customer's data is isolated in its own workspace and project.
HTTPS and encrypted storageData in transit is encrypted with TLS. Storage uses encrypted AWS infrastructure.
Scoped project API keysSDK keys are scoped per project and authorize ingestion only, not workspace access.
Data minimization guidanceFaultLens documents what not to send: no passwords, tokens, secrets, or payment data.
Controlled internal accessPersonnel access to customer data is limited to operational necessity only.
Why it feels different
FaultLens is intentionally narrower so production diagnosis can be clearer.
The product is designed around focus over breadth, context over tool sprawl, and practical diagnosis over platform theater.
What that means for the team
The issue stays centralTeams do not have to leave the investigation trail to recover the release, environment, or next action.
Context arrives earlierThe first useful clues show up near the problem instead of after a fresh round of Slack and tab chasing.
Focus over breadthFaultLens is built for issue-led production diagnosis, not for becoming another all-purpose ops surface.
Context over noiseThe workflow keeps the issue, release, environment, and surrounding clues close instead of spreading them across separate tools.
Designed for the incident, not the demoFaultLens is built around how teams actually debug - under pressure, context switching, needing the next useful action fast. Not for a polished walkthrough.
Does this sound like your last incident?
If your team spent the first half-hour of a production issue figuring out what changed instead of fixing it, FaultLens is built for that exact problem. Join the waitlist or talk to us directly at hello@faultlens.in.
Early access
See if FaultLens fits the way your team handles production incidents.
FaultLens is in selective early access for SaaS engineering teams that want a calmer, issue-led diagnosis workflow. Leave a work email and we will reach out when rollout opens for the right fit.
What happens next
Tell us who you areWork email is enough. Name and company help us route the right teams faster.
We review fit for the current rolloutFaultLens is still narrow, so we prioritize teams dealing with recurring production diagnosis work.
If it fits, we will reach out directlyEarly access and onboarding are founder-led, not an automated signup queue.
- Handle recurring production issues across multiple releases or environments.
- Lose time figuring out what changed before they can fix the problem.
- Want a narrower diagnosis workflow instead of a broader observability platform.
FaultLens is introduced carefully through direct conversations, guided onboarding, and honest fit checks for teams with recurring production diagnosis work.
Next step
Still rebuilding the investigation trail by hand?
If production diagnosis is costing your team time it should not, leave a work email and a little team context. If FaultLens fits the way you debug, we will reach out with next steps.
Guided accessDirect onboardingBuilt for SaaS engineering teams