CarGurus and Kelley Blue Book (KBB) are two major automotive marketplaces serving millions of buyers and sellers. During the week of April 20, 2026, CarGurus maintained 100% uptime while KBB achieved 99.8%, according to Uptrue's independent monitoring. Response time performance differed significantly, with CarGurus averaging 200ms versus KBB's 777ms.
- CarGurus maintained perfect 100% uptime; KBB achieved 99.8% uptime (monitoring period: April 20–26, 2026)
- CarGurus responded 4× faster with 200ms average vs. KBB's 777ms average
- Neither provider experienced incidents or recorded downtime during the monitoring week
- Data collected by Uptrue's independent monitoring network across North American infrastructure
Uptime This Week
Both providers delivered strong availability during the monitoring period. CarGurus achieved 100% uptime with zero recorded incidents or downtime events. KBB fell marginally behind at 99.8% uptime, though no actual downtime minutes were recorded—the slight difference likely reflects request timeouts or transient detection events rather than infrastructure failure.
Response Time
CarGurus demonstrated substantially faster response times, averaging 200ms per request. KBB's average response time of 777ms is nearly four times slower, a significant gap that impacts user experience during browsing, search, and listing operations. This performance differential is consistent with different infrastructure scaling or architectural decisions between the platforms.
Incidents & Downtime
Both CarGurus and KBB reported zero incidents and zero minutes of downtime during the week of April 20, 2026. This reflects robust platform stability for both competitors, with no major outages or service degradations detected. The automotive marketplace sector showed strong operational resilience during this monitoring period.
Which Should You Choose?
Choose CarGurus for latency-sensitive workflows and user-facing integrations where response time matters; its 200ms baseline supports faster page loads and search interactions. KBB remains a viable choice for less time-critical integration scenarios, though the 577ms response-time delta should inform SLA expectations. Both providers proved reliable during this period, so uptime availability alone should not be the deciding factor.
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