Sentry alternative
Sentry is the standard for application monitoring: stack traces with source maps, releases, alerts, tracing and backend SDKs. Datasense isn't trying to replace all of that. It records front-end JavaScript errors with the same script that counts your visitors, so you can see which pages break, for whom, and whether it costs you traffic or sales.
Free up to 5k events a month. No card.
Sentry is the better tool if you need alerts, source maps, release tracking, server errors or performance tracing. Datasense is the better tool if you want front-end errors next to your analytics without a second SDK, and many teams use both.
Side by side, on the things people ask about most. Checked against Sentry's own site in October 2026.
| Feature | Datasense | Sentry |
|---|---|---|
| Free plan | 5k events a month, 1 site | 5k errors and 50 replays a month, 1 user |
| Paid plans from | $9/month for 50k events | $29/month on Team |
| No cookie banner needed | Cookies by default; switch any site to cookieless | The browser SDK sets no cookies |
| Realtime visitors | Updates every second | |
| JavaScript error tracking | Last 100 errors per site, with stack and browser | Errors, stack traces, source maps and releases |
| Revenue by traffic source | Stripe, Dodo Payments or any provider | |
| Goals and custom events | One line of code or a data attribute | |
| Proxy to get past ad blockers | Recipes for Next.js, Vercel, Netlify, Cloudflare, Nginx | A tunnel option gets past ad blockers |
| AI crawler and bot tracking | See which AI crawlers read your pages, on paid plans | |
| Visitor profiles and journeys | Each visitor's pages, visit by visit | User context and breadcrumbs |
| Raw data export | CSV and JSON, any date range, on paid plans | API |
| Script size | Under 4 KB | About 32 KB for errors only |
| Open source / self-host | Self-hostable, source-available license | |
| Session replay | On Pro and Team, 5k recordings a month on Pro | 50 replays a month on Free and Team |
| On-site surveys | Up to 2 questions, on every plan | A user feedback widget |
Sentry's errors-only browser bundle is about 32 KB, on top of your analytics. Datasense records uncaught exceptions, unhandled rejections, failed scripts, images and stylesheets, and console.error calls with the same script that counts visitors, under 4 KB.
Each error in Datasense shows its page, browser, device and country, how many visitors it hit, and a link to the session replay when the visit was recorded. You see whether a bug is costing you traffic, not only that it happened.
Sentry goes much deeper: source maps, releases, alerts, code owners, tracing and AI root-cause analysis. Datasense keeps the latest 100 errors per site and doesn't alert. It's for noticing what breaks, not running an on-call rotation.
Sentry's Developer plan is free for 1 user with 5k errors a month. Team is $29 a month billed monthly ($26 yearly), with usage billed on top for errors, replays, spans and logs. Datasense is free up to 5k events, $9 a month for 50k events and 5k recordings, and $49 a month for 200k events.
It takes about five minutes, and you don't have to turn anything off on day one.
Create a free account and paste one script tag into your site's <head>. Leave Sentry where it is for now.
Compare visitors, top pages and sources. Datasense often shows more visitors once the proxy is on, because ad blockers stop blocking it.
When you're happy, delete the Sentry snippet. Export your old data from Sentry first if you want to keep it.
Or see all web analytics tools on one page.
Add one script tag, compare the numbers, then keep the one you like. The free plan is enough to test it.
Add your siteSentry is a trademark of its owner. Facts checked October 2026; if something changed, tell us at [email protected].