# Ambrosia Systems Inc

> Ambrosia Systems is a San Francisco medical-technology company that makes continuous glucose monitoring cheap, wearable, and phone-optional. Founded in 2016 by Piyush Gupta, an ex-Abbott engineer, it built the NightRider BluCon to beam FreeStyle Libre readings straight to an Apple Watch, then shipped RIZZ, a smart ring that estimates glucose trends without needles. The company sells in more than 100 countries and is chasing a target of non-invasive CGM for under $100 a year per patient.

- **Founded:** 2016
- **Headquarters:** San Francisco, United States
- **Founders:** Piyush Gupta (Founder & CEO)
- **Team size:** ~32 employees
- **Products:** NightRider BluCon, Direct-to-Apple Watch NightRider BluCon, LinkBluCon / FollowBluCon apps, Ambrosia Real-Time CGM Service, RIZZ Smart Ring
- **Notable:** Cut continuous glucose monitoring costs from roughly $6,000 to $2,000 per patient, with a stated goal of under $100 per year., Shipped what it calls the world's first Direct-to-Apple Watch continuous glucose monitor (2019)., Distribution of the NightRider BluCon across more than 100 countries.

## Products & services

- **NightRider BluCon** — A small device that clips over a FreeStyle Libre or Libre Pro sensor, reads its NFC signal every 5 minutes, and transmits glucose readings over Bluetooth to a phone or directly to an Apple Watch or Android Watch - turning a flash-scan patch into a real-time continuous glucose monitor.
- **Direct-to-Apple Watch NightRider BluCon** — A version that displays live glucose on an Apple Watch without a paired iPhone nearby, aimed at children who cannot carry phones to school, the elderly, and hearing-impaired users.
- **LinkBluCon / FollowBluCon apps** — Companion apps that show real-time glucose, set high/low and rate-of-change alarms, and let up to five caregivers remotely follow a patient's readings, including an Amazon Alexa skill for voice check-ins.
- **Ambrosia Real-Time CGM Service** — A subscription bundle of Libre sensors, a waterproof NightRider BluCon, smart patches, and app access sold as 1-, 3-, and 12-month diabetes-management packages in most countries outside the US.
- **RIZZ Smart Ring** — A titanium non-invasive smart ring using optical sensors to estimate glucose trends alongside sleep, stress, heart rate, HRV, blood oxygen, skin temperature, and activity - with 5-7 day battery life and an optional BluCon add-on for true CGM integration.

## Achievements

- Cut continuous glucose monitoring costs from roughly $6,000 to $2,000 per patient, with a stated goal of under $100 per year.
- Shipped what it calls the world's first Direct-to-Apple Watch continuous glucose monitor (2019).
- Distribution of the NightRider BluCon across more than 100 countries.
- Launched RIZZ (2025), positioned as a first-of-its-kind non-invasive smart ring for glucose trends.
- Selected as a StartUp Health T1D Moonshot Health Transformer.

## Latest updates

- **2025-07** — Launched the RIZZ non-invasive smart ring for glucose trends and whole-body wellness; pre-orders opened at $249 with shipping from October 1, 2025.
- **2025-11** — Expanded the RIZZ product line and 12-month CGM service bundles pairing the ring with the waterproof NightRider BluCon.

## Links

- Website: https://ambrosiasys.com
- LinkedIn: http://www.linkedin.com/company/ambrosiasystemsinc
- Twitter/X: https://twitter.com/Ambrosia_Sys
- Facebook: https://www.facebook.com/ambrosiasys

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Published by YesPress — https://yespress.io
Last updated: 2026-08-21