Ultraviolet Observability vs dislike404.com

A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.

Ultraviolet Observability compared with dislike404.com
Detail	Ultraviolet Observability	dislike404.com
What it does	Self-hosted observability platform for Kubernetes that keeps all telemetry data within your firewall	Free automated broken link and 404 error monitoring for your website with email alerts
Stage	Startup	Not given
Founded	Not given	Not given
Based in	Not given	DE
Pricing model	Paid	Free
Pricing	Evaluation: Free for 30 days with full-function core and unlimited nodes during trial. Connected: $25 per node per month with 10-node minimum, billed on node-minutes. Air-gapped: Annual hand-carried license with no call-home. No per-GB, per-span or per-user fees.	Completely free. Unverified accounts: up to 200 internal pages and 1,000 total requests per scan. Verified accounts: up to 50,000 internal pages and 500,000 total requests per scan. Higher limits available upon request.
Key features	Distributed traces and APM with automatic instrumentation across HTTP, gRPC, DNS and databases Logs correlated to traces with severity faceting and live tail Metrics pipeline supporting Prometheus remote-write and Fluent Bit Kubernetes and infrastructure monitoring with node and workload health Dashboards, SLOs with error budgets and Datadog dashboard import Local alerting rules evaluated inside the core routed to Slack, PagerDuty, Teams or email Real user monitoring with Core Web Vitals, session replay and browser to backend trace stitching Multi-site support with remote clusters dialing home over outbound mTLS OpenTelemetry-native support for OTLP over gRPC and HTTP No code instrumentation required for application tracing	Automated 404 error scanning Email alerts with flexible notification settings Adjustable scan intervals from daily to monthly Manual on-demand scanning URL blacklisting and filtering Redirect chain validation CSV export of scan results WordPress plugin for dashboard integration Multiple website monitoring on single account GDPR-compliant server in Germany
What makes it different	Zero telemetry egress and all data stays on customer infrastructure Predictable pricing based on node-minutes with no per-GB or per-span charges Automatic instrumentation with no code changes required	Completely free with no paywalls, trial expiration, or hidden costs Proactive monitoring that alerts before Google or visitors notice issues Respects server resources with adjustable crawl speed and robots.txt compliance
Community votes	0	0
DR (Domain Rating by Ahrefs)	23 +5 (up) since last check	57 no change since last check
Trust Flow (Majestic)	0	17
Citation Flow (Majestic)	20	45
Referring domains (Majestic)	5	40

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