Oh Dear

Uptime, certificate expiry, DNS, broken links and cron monitoring in one small product.

Covers the checks that only matter once.

What it is sold for

Watching a site's health without a monitoring platform.

The rest of monitoring and analytics, alphabetically. Sharing a category is a filing decision, not a relationship.

Airbrake

Error monitoring and alerting, one of the earlier hosted exception trackers.
Anteon

Kubernetes monitoring using eBPF, so service maps come from the kernel rather than from instrumented code.
Baremetrics

Subscription analytics that reads the billing system and produces the revenue metrics from it.
Better Stack

Logs, metrics, traces, uptime and on-call in one product, sold against assembling four vendors.
Carbone

Generates documents from templates and JSON: PDF, DOCX, XLSX and the rest of the office formats.
devActivity

Analytics over engineering activity, producing contribution and delivery metrics from repository data.
DocRaptor

HTML to PDF over an API with proper CSS Paged Media support, which most converters do badly.
Export SDK

PDF generation with a template editor, an API and no-code integrations.

ImranTools[Oh Dear]