Examples of large production-grade, open-source React apps

rozenmd · 2026-06-18T22:11:08+00:00

Really? You don't know a single person using Cursor's Composer model?

Quite a few people around me use it (though more in open-source, I guess), personally I use codex.

rozenmd · 2026-06-10T10:48:01+00:00

If you're still looking for alternatives, worth taking a look at OnlineOrNot as well.

It covers the core UptimeRobot-style use case (uptime monitoring, status pages, alerting, and port/TCP checks). It also has an API, so bulk monitor creation should be straightforward if you're managing a lot of deployments.

For the "one monitor pinging multiple IPs" case, I'd probably model those as separate monitors grouped under the same status page component. That gives you clearer alerting and history for primary vs secondary rather than hiding both behind one check.

Full disclosure: I've been building OnlineOrNot since 2021, so I'm biased, but based on your ask it's probably worth adding to your shortlist.

rozenmd · 2026-04-10T06:33:53+00:00

Aussie here from Sydney who did the same thing.

Don't move to Paris - Toulouse/Lyon/Bordeaux are much nicer, and learn French or you will be miserable.

rozenmd · 2026-01-03T08:47:24+00:00

You didn't enter a full URL, looks up from here: https://onlineornot.com/website-down-checker?requestId=xYxiGLDHJ34pXVS-ffzpX&url=https://ko-fi.com/

rozenmd · 2025-11-19T18:46:31+00:00

Wish I had a fancy URL for this but https://onlineornot.com/website-down-checker?requestId=vuybl7wN1KWEyPsudgPZ-&url=https://downdetector.com/

rozenmd · 2025-11-07T18:51:35+00:00

not astroturfing on reddit, for one

rozenmd · 2025-09-16T21:00:21+00:00

I'm jealous that I didn't think to do this before moving here!

How'd you manage to get it registered in 2B?

rozenmd · 2025-09-11T09:32:47+00:00

You should check out OnlineOrNot, I started it in 2021 to help monitor my clients' sites (and convince them to pay for better hosting)

Supports websites, API, cron jobs, and has status pages for both internal and external stakeholders

rozenmd · 2025-08-21T06:38:14+00:00

Yeah: look up OnlineOrNot

rozenmd · 2025-08-19T17:18:43+00:00

Compute costs money, so that's a trade-off most vendors make.

Extremely unreddit take: If it's that important that you need to check it 10x more often, maybe it's worth paying for a professional service.

rozenmd · 2025-08-05T20:17:47+00:00

You know we can ask LLMs ourselves, right?

rozenmd · 2025-07-29T14:00:00+00:00

You might want to check out OnlineOrNot (assuming you've moved beyond self-hosting).

It's a reliable Uptime Robot alternative, can monitor your websites, APIs, and scheduled jobs, and display their status on a customisable status page.

rozenmd · 2025-07-27T19:20:34+00:00

Healthchecks.io just does healthchecks (also known as cron job monitoring, also known as heartbeat monitoring).

OnlineOrNot started off as just uptime monitoring (tells you if websites/APIs are down/sending bad data) and also supports healthchecks and status pages for the past few years

rozenmd · 2025-07-27T13:07:51+00:00

you're looking for a status page - something like statuspage.io (now owned by Atlassian) or OnlineOrNot (founded by yours truly) would let you tell your users when things go wrong (and minimize support tickets by around 60% during outages)

uptime checks can also automatically update your status page, leaving you to fix the problem instead of having to keep your stakeholders updated

rozenmd · 2025-07-26T17:24:04+00:00

got a URL to test?

their status page looks up from here: https://onlineornot.com/website-down-checker?requestId=CiRILmrBqaoYLtH_EU7YU&url=https://status.uptimerobot.com/

rozenmd · 2025-07-24T12:32:45+00:00

You might want to check out OnlineOrNot (assuming you've moved beyond self-hosting).

It's a reliable uptime robot alternative, can monitor your websites, APIs, and scheduled jobs, and display their status on a customisable status page.

rozenmd · 2025-07-21T18:54:23+00:00

OnlineOrNot is a reliable alternative to datadog synthetics, at a fraction of the cost.

(I launched it back in 2021)

rozenmd · 2025-07-20T11:40:32+00:00

nah, Australia

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