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Wesper is a Special Mention on TIME's Best Inventions of 2026
Wesper
    • Wesper LabDirect respiratory data from two patches, with no nasal cannula.
    • Wesper LitePPG-based testing in a ring that is easy to wear.
    • How Wesper WorksThe managed workflow, from order to follow-up.
    • Provider SolutionsEverything Wesper runs for your clinic.
    95%+ AHI Correlation to PSG See the validation behind Wesper Lab and Wesper Lite. Explore Validation
    • ValidationPeer-reviewed accuracy against in-lab PSG.
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    The Journal Clinical research, case studies and sleep medicine news. Read the Journal
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Wesper

Personalized sleep testing. Personalized care.

Wesper Weekly

Research, releases and sleep medicine news, once a week.

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Wesper Lab (K203343) and Wesper Lite, powered by Cassie (K252628), are FDA-cleared. Indicated for adult use only.

Citations

95%+ AHI correlation to PSG: Sleep Medicine 2025; JCSM 2023. Wesper Lite: Cassie (K252628), the engine behind Wesper Lite. FDA 510(k) summary: multi-site retrospective validation in 474 independent test subjects from the National Sleep Research Resource; AHI Pearson r = 0.96 (95% CI 0.95 to 0.96) vs. polysomnography. FDA record

Wesper Lab validation: Raphelson, J., Ahmed, I., Ancoli-Israel, S. et al. Evaluation of a novel device to assess obstructive sleep apnea and body position. J Clin Sleep Med 19, 1643-1649 (2023). doi.org/10.5664/jcsm.10644

Automatic scoring vs. provider manual scoring (r = 0.98): Sleep Medicine 2026.

99%+ patient success rate and under 5 days from order to successful test: Wesper, Q3 2026.

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