Uptrue's independent monitoring of two major automotive platforms during the week of 27 April 2026 reveals a significant reliability gap. AutoTrader (autotrader.co.uk) experienced complete unavailability to our monitoring systems, while Kelley Blue Book (kbb.com) maintained 99.1% uptime with consistent response performance.
- Kelley Blue Book achieved 99.1% uptime vs. AutoTrader's 0% during the monitoring period
- KBB maintained an average response time of 726ms; AutoTrader response data was unavailable
- Both platforms reported zero detected incidents in their official channels, but monitoring data contradicts AutoTrader's availability
- KBB's performance aligns with enterprise-grade reliability expectations for automotive marketplaces
Uptime This Week
Kelley Blue Book delivered 99.1% uptime, meeting standard SLA expectations for consumer-facing platforms. AutoTrader's 0% uptime figure indicates the service was either completely offline or blocked Uptrue's monitoring probes throughout the week. This dramatic difference suggests either infrastructure issues or monitoring accessibility problems on AutoTrader's side.
Response Time
Kelley Blue Book's average response time of 726ms falls within acceptable ranges for automotive listing platforms, indicating stable server performance. AutoTrader response time data was unavailable due to the monitoring connectivity issues, preventing comparative latency analysis.
Incidents & Downtime
Neither provider reported formal incidents through their status pages during this period. However, AutoTrader's complete unavailability to independent monitoring suggests undetected or unreported infrastructure problems, while KBB's zero-incident record aligns with its measured uptime performance.
Which Should You Choose?
Kelley Blue Book is the clearly superior choice for this monitoring period based on measured availability and response performance. Organizations requiring real-time monitoring should investigate AutoTrader's blocking of monitoring services or underlying availability issues before committing production traffic.
All uptime, response time, and incident data is collected by Uptrue's independent monitoring infrastructure. HTTP checks run every 5 minutes. An incident is recorded only after 2+ consecutive failed checks. Uptrue is not affiliated with any monitored service. For corrections: reports@uptrue.io