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Sentry-SDK compatible · migrate in one line

Every error, already grepped for you.

Errors, traces, logs and session replay for any Sentry SDK — Python to Flutter to Next.js — plus OpenTelemetry. Migrate by changing a single line: your DSN.

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Free tier · no credit card · migrate in one line

One DSN. Every Sentry SDK.

If it speaks Sentry, it speaks Grepcat — plus OpenTelemetry.

PythonDjangoFastAPIFlaskCeleryJavaScriptTypeScriptNext.jsExpressReactVueAngularSvelteFlutterReact NativeRuby on RailsGoPHPLaravelJavaSpring Boot.NETKotlinSwift OpenTelemetry

One surface. Every signal.

Pivot from a replay to the error to the trace to the log — in one click.

Errors & Issues

Automatic grouping, regressions, suspect commits, and source-mapped stack traces.

Session Replay

Web (rrweb) and mobile video replay, stitched seamless, with a synced activity timeline and touch overlay.

Traces

Distributed span waterfalls with autogrouping and one-click pivots to errors and logs.

Logs

Structured, searchable, live-tailing logs correlated to traces and replays.

Alerts

Spikes, new issues, regressions, crash-free drops — to Slack, email, webhook, or Telegram.

Releases

Adoption, crash-free sessions/users, and regression tracking across every deploy.

< 50ms
ingest p50
100%
your data stays yours
1 line
to migrate (DSN)
∞
never stops grepping

From noise to root cause in one flow.

01

Detect

Error grouping and alerts surface the signal.

02

Reproduce

Frame-accurate session replay shows the moment.

03

Understand

Traces, logs and context stay linked.

04

Fix

Symbolicated stack traces and source maps point to the cause.

05

Verify

Release health and crash-free % confirm the fix.

See it working.

Grepcat Errors view
Errors
Grepcat Session replay view
Session replay
Grepcat Release health view
Release health
Grepcat Alerts view
Alerts

Already on Sentry?

Keep your SDK. Change one line — your DSN. Errors, replays, release health, traces, logs and alerts keep flowing — straight to your dashboard.

Issue grouping & dedup
Session replay incl. live view
Release health (crash-free %)
Distributed traces & spans
Structured logs
Alerts to Slack/Discord/Telegram/email
Migrate in minutes Read the OpenTelemetry docs

Get started in minutes.

01Install your SDK02Paste your DSN03Watch it grep
change one line
sentry_sdk.init(
  dsn="https://<DSN_PUBLIC_KEY>@o0.ingest.sentry.io/<project-id>",
  dsn="https://<DSN_PUBLIC_KEY>@<your-deployment-host>/<project-id>",  # just the DSN
)

Plays well with everything you run.

Notify

SlackDiscordTelegramEmailWebhooks

Work

GitHub IssuesGitLab IssuesSource MapsOpenTelemetry

Your data stays yours.

Encryption

TLS in transit, at rest.

Retention

Per-project retention controls.

Isolation

Single-tenant separation.

Access

SSO + role-based access.

No seat tax. No surprises.

One flat price per project — unlimited seats, unlimited teammates. Your data stays yours, always.

Get started free

Catch it all. Grep it for you.

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