Side by side

deltaFeed vs Uptime Cairn

Both stand on website monitoring software. Which one you can start free with, which one lets you read the code, and what each costs once you pay.

deltaFeed

Free plan Web

deltaFeed provides a straightforward way to follow webpage changes through RSS or email, with faster checking and more monitorings on paid plans. Its extraction limits and page restrictions should be reviewed before relying on it for critical monitoring.

Visit deltaFeed

Uptime Cairn

Free plan APILinuxSelf-hosted+1

Uptime Cairn offers broad monitoring, alerting, reporting, and status-page features in a self-hosted package. Its lack of a hosted tier and the listed unshipped features matter if you need those capabilities.

Visit Uptime Cairn

The facts

	deltaFeed	Uptime Cairn
Free plan	Yes	Yes
Open source	Not published	Not published
Runs on	Web	API, Linux, Self-hosted, Web
Lowest paid plan	Plus: €6.25 a month	Free or on request
Plans published	3	1
Maker	Not published	Not published
Website	bitreading.com	uptimecairn.dev
On website monitoring software	#14 of 55	#18 of 55

deltaFeed: what it does well

Creates RSS feeds from non-RSS pages
CSS selectors monitor selected content
Email alerts for individual pages
Paid plans check every two hours or 30 minutes
Free registration and free plan

What to know first

Monitoring extraction is not guaranteed complete
Files beyond listed text content types are unsupported
Facebook monitoring requires open pages
Basic plan is personal use only

Uptime Cairn: what it does well

Supports a wide range of network and service checks.
Status pages allow custom domains and branding.
Provides a REST API and scheduled reports.
No features are held back for a paid tier.

What to know first

There is no hosted tier.
Multi-region probing, SSO, and synthetic browser flows have not shipped.
The site recommends a reverse proxy before internet exposure.

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