Synthetic Monitoring vs Real User Monitoring (RUM): The Difference

Short summary

Synthetic monitoring proactively tests scripted journeys on a schedule to catch regressions and downtime before users are affected. Real User Monitoring (RUM) records what actual visitors experience retrospectively, revealing real-world performance by device and network. Neither works alone—mature systems layer both: synthetic for early-warning SLAs, RUM for prioritization by real impact.

• •Synthetic monitoring runs scheduled checks before users arrive; RUM measures what actually happens on real devices
• •Synthetic catches 3 AM deploys and regressions instantly; RUM prioritizes problems by actual volume and usage patterns
• •Production systems need both: synthetic for SLA reliability, RUM for real-world performance diagnosis

Generated with AI, which can make mistakes.