# O11y Watch

> Independent tracker of free tiers and pricing changes for 73 observability tools (APM, logs, errors, uptime, on-call, LLM observability). Data is copied from vendor pricing pages with a source URL and check date; unknowns are "not stated".

## Data (JSON, no auth)
- [All vendors](https://o11y-watch.pages.dev/api/vendors.json)
- [One vendor](https://o11y-watch.pages.dev/api/vendors/{id}.json)
- [Changes](https://o11y-watch.pages.dev/api/changes.json)
- [Categories + best free pick](https://o11y-watch.pages.dev/api/categories.json)
- [OpenAPI spec](https://o11y-watch.pages.dev/openapi.json)
- [JSON Feed](https://o11y-watch.pages.dev/feed.json) · [RSS](https://o11y-watch.pages.dev/rss.xml)

## Pages
- [Directory](https://o11y-watch.pages.dev/directory.html)
- [Change log](https://o11y-watch.pages.dev/changes.html)
- [Methodology](https://o11y-watch.pages.dev/about.html)
- [For agents](https://o11y-watch.pages.dev/for-agents.html)

## Categories
- [APM & full-stack](https://o11y-watch.pages.dev/category/apm.html): best free = newrelic
- [Logs](https://o11y-watch.pages.dev/category/logs.html): best free = axiom
- [Error tracking](https://o11y-watch.pages.dev/category/errors.html): best free = sentry
- [Uptime, cron & status pages](https://o11y-watch.pages.dev/category/uptime.html): best free = uptimerobot
- [On-call & incidents](https://o11y-watch.pages.dev/category/incident.html): best free = pagerduty
- [LLM observability](https://o11y-watch.pages.dev/category/llm.html): best free = langfuse
- [Product analytics & replay](https://o11y-watch.pages.dev/category/product.html): best free = posthog

## Optional
- [Full text dump](https://o11y-watch.pages.dev/llms-full.txt)