12 CGM Comparison Charts and Head-to-Head Reviews

Choosing between continuous glucose monitors is difficult because every device excels in different areas. The Dexcom G7 leads in insulin pump integration and alert customization, but the FreeStyle Libre 3 Plus is more accurate and cheaper. The Dexcom Stelo offers richer data analytics than the Abbott Lingo, but the Lingo costs half as much. These tradeoffs are impossible to evaluate from a spec sheet alone — you need side-by-side analysis that explains which differences matter for your specific situation.

Every comparison below follows the same structure: a specification table showing measurable differences, a feature-by-feature analysis explaining why each difference matters, and a clear verdict stating which device or service wins — or when neither is objectively better and the choice depends on individual needs. We compare 12 matchups across 3 categories: device-vs-device head-to-heads, service-vs-service evaluations, and category comparisons (like prescription vs OTC or CGM vs fingerstick monitoring).

These comparisons are updated as new devices launch, firmware updates change feature sets, and pricing shifts. Each comparison uses the same data from our product database, ensuring consistency across all evaluations. For a full overview of every CGM ranked by overall performance, visit our complete CGM rankings.