v4.2 — Streaming Replay is now in public beta → read more

Real-time error
visibility for the browser.

Browsonic captures every thrown error, unhandled rejection and network failure in your JavaScript app — with full stack traces, console context, and session timeline, streamed to your console the instant they happen.

Start tracking — free forever
Trusted by engineering teams at
Parallax Northwind Helix Labs Outlier Fernway

Release 2026.04.18-c3e

Source maps uploaded automatically. Every frame is resolved to your original TypeScript.

api.ts:148 checkout.tsx:62 + 14 more

Anomaly detected

TypeError rate jumped 3.4× vs 24h baseline on chrome/mobile.

p99 +412ms users 241
● app.browsonic.dev /projects/acme-web/stream
⌘K LIVE

Live Stream

STREAMING env: production · release: 2026.04.18-c3e
Events / min
214 +18%
Affected users
1,284 +42
Crash-free sessions
99.4% +0.2
Time
Event
Users
● TypeError Cannot read properties of undefined (reading 'price') checkout/CartSummary.tsx · bundle.c3e.js
01 formatCurrency ( undefined ) at utils/format.ts:48 ← current
02 CartSummary.render ( ) at checkout/CartSummary.tsx:148
03 renderWithHooks ( ) at react-dom.development.js:16305
04 beginWork ( ) at react-dom.development.js:21601
// the stack

Every error, every frame,
with the context to fix it.

Stop guessing which user on which release hit which error. Browsonic streams the full picture — in milliseconds.

Millisecond ingest

Events land in your dashboard before the user's next keystroke. No 30-second batching, no lag.

Full stack traces

Symbolicated against your sourcemap. Every frame links to the exact line in your repo.

01renderCart()
02CartSummary.render()
03formatCurrency()
04▸ TypeError @ line 148

Session timeline

Replay the last 60 seconds before the crash — every click, network call and console log.

00:42
01:28

Anomaly detection, out of the box

Baselines every release automatically. You get paged when something breaks — not before, not after.

Framework native

First-class support for React, Vue, Svelte, Next, Remix, Astro and vanilla.

react@18 next@14 vue@3 svelte remix astro
// 1 SDK · 7 adapters

First-party adapters for
every framework you ship.

Drop-in error boundaries, navigation breadcrumbs, and route-handler wraps — all peer-only on the framework you already use. Apache-2.0, npm provenance, CycloneDX SBOM on every release.

React

on npm

Error boundary, hooks, HOC, React Router instrumentation.

$ npm i @browsonic/react Read the docs →

Vue 3

on npm

Plugin, <BrowsonicErrorBoundary>, composables, Vue Router instrumentation.

$ npm i @browsonic/vue Read the docs →

Svelte

on npm

SvelteKit handleError, store-driven user identity, navigation breadcrumbs.

$ npm i @browsonic/svelte Read the docs →

Next.js

on npm

App Router error pages, route handler wrap, Pages Router companions.

$ npm i @browsonic/nextjs Read the docs →

Astro

on npm

View Transitions breadcrumbs + integration auto-injection.

$ npm i @browsonic/astro Read the docs →

Angular

on npm

ErrorHandler drop-in, BrowsonicService, Router instrumentation.

$ npm i @browsonic/angular Read the docs →

Remix

on npm

Route ErrorBoundary, action + loader wrappers, entry.client helper.

$ npm i @browsonic/remix Read the docs →

Migrating from Sentry or TrackJS ? The mapping is almost one-to-one — most teams complete the move in under an hour.

// one line

Two minutes from npm install to live errors.

Drop in the agent, set your DSN, ship. Browsonic auto-instruments fetch, XHR, history, console and unhandled rejections automatically.

  • ✓
    2.4 KB agent, gzipped. Loads asynchronously, never blocks first paint.
  • ✓
    Source maps, uploaded on build. Full CLI + Vite, Webpack, Rollup and Turbopack plugins.
  • ✓
    SOC 2 Type II & GDPR. PII scrubbing happens on-agent, before the event ever leaves the browser.
app.tsx browsonic.config.ts vite.config.ts ● saved
1 // 3 lines. that's it. 2 import { browsonic } from '@browsonic/agent' 3   4 browsonic.init({ 5   dsn: 'https://ingest.browsonic.dev/p/acme-web', 6   release: process.env.GIT_SHA, 7   environment: 'production', 8   replay: { sampleRate: 0.1 }, 9   scrub: ['email', 'auth_token'], 10 }) 11   12 // done. Every thrown error, unhandled rejection, 13 // and failed fetch is now streamed to your dashboard.
47ms
median ingest latency
2.4 kB
gzipped agent size
99.99%
ingest uptime, last 12mo
3.2 B
events processed this week
// pricing

Simple, usage-based pricing.

Start free forever. Scale as your traffic grows. No per-seat fees, no gotchas.

Monthly Yearly − 20%

Free

Solo developer kicking the tyres — 1 app, very tight limits.
$0 /mo
Start for free
  • ✓ 5,000 events / month
  • ✓ 1 app, 1 environment
  • ✓ 7-day retention
  • ✓ 1 team member
  • ✓ Source maps + symbolication
  • ✓ Community support

Starter

For small SaaS and agencies. Alerts + Slack, no enterprise gates.
$49 /mo
Get started
  • ✓ 100,000 events / month
  • ✓ 3 apps, 5 team members
  • ✓ 14-day retention
  • ✓ Anomaly + threshold alerts
  • ✓ Slack integration
  • ✓ Email support
Most popular

Professional

Full SaaS package for teams shipping in production.
$349 /mo
Get started
  • ✓ 1,000,000 events / month
  • ✓ 25 apps, 25 team members
  • ✓ 90-day retention
  • ✓ Session replay (10% sample)
  • ✓ All integrations — Slack, PagerDuty, Linear, Jira
  • ✓ REST + Webhook API access
  • ✓ Priority support, 99.9% SLA

Enterprise

For teams with custom volume, compliance and self-hosting needs.
Let's talk
Contact sales
  • ✓ Custom event volume
  • ✓ Full session replay (100% sample)
  • ✓ SSO (SAML / OIDC)
  • ✓ RBAC + audit log
  • ✓ Self-hosted (BYOC) option
  • ✓ SOC 2 + HIPAA BAA, custom DPA
  • ✓ Dedicated CSM, 99.95% SLA

Stop finding out from users.

Start free. No credit card. Live data in under two minutes.

Start free Book a demo