XUND vs CircadiaOS
A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.
XUND compared with CircadiaOS
| Detail | 
XUND | 
CircadiaOS |
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| What it does | AI-powered medical decision support for patients and healthcare professionals
| The thermostat schedule that learns from your sleep
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| Stage | Established
| Not given
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| Founded | 2018
| Not given
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| Based in | AT
| US
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| Pricing model | Contact for pricing
| Freemium
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| Pricing | Not given
| Free: starting temperature schedule, optional wearable connection, nightly sleep data and trends, no thermostat control. Premium (monthly): $12.99/month with automatic thermostat control, four-phase schedule, 14-night starting period, one-variable-at-a-time adjustment from wearable data, 14-day free
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| Key features | - MDR 2017/745 certification
- ISO 13485:2016 certified quality management
- ISO 27001:2022 security compliance
- De-identified data processing
- German data storage for GDPR compliance
- Multi-language support
| - Four-phase overnight temperature schedule (pre-sleep, early night, late night, pre-wake)
- One-variable-at-a-time personalization held for 7 to 14 nights per change
- Wearable integration: Apple Watch, Oura Ring, Whoop, Garmin, Fitbit
- Thermostat compatibility with Nest, ecobee, Honeywell Home and 20+ brands
- 14-night starting period and reference point on Premium
- User-set temperature floor and ceiling, never below 63°F
- Why This Curve display showing where each setpoint came from and data behind it
- Best vs Worst nights comparison showing highest and lowest scoring nights
- Manual override capability with automatic resumption next night
- Referral program earning free months of Premium for every three friends who join
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| What makes it different | - API-first certified medical devices that don't require integrators to become device manufacturers
- Medical content verified by in-house doctors using AI and literature review
- Comprehensive symptom coverage with 360+ symptom groups and 21,000+ variations
- European data protection with local German storage and GDPR/HIPAA compliance
- Trusted by leading healthcare organizations across multiple sectors
| - No new hardware required—works with your existing smart thermostat and wearable
- Software-first approach running sleep algorithms on your thermostat rather than requiring specialized cooling beds
- Personalization through one-change-at-a-time adjustments graded against your own sleep data
- Complete transparency showing where every setpoint comes from and how much data supports it
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| Community votes | 0 | 0 |
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| DR (Domain Rating by Ahrefs) | 38 ● no change since last check | 13 ● no change since last check |
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| Trust Flow (Majestic) | 17 | 4 |
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| Citation Flow (Majestic) | 32 | 24 |
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| Referring domains (Majestic) | 168 | 47 |
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5 details filled in for both companies.
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