Company: Juno
Founder: Marshall Gould
Website: https://junocompanion.com/
About Juno
Juno, the AI health companion for people living with chronic illness, launched in October 2025, born from a deeply personal mission. Co-founder Marshall Gould spent over a year researching how people with chronic illness use social media during his time at the University of Oxford, all while fighting his own battle with chronic fatigue. He set out to build something that didn’t yet exist: a single place for sufferers to connect the context around their health and understand not just how they felt, but why.
The challenge was understanding what it means to live with chronic illness. Patients endure daily symptoms, consult an average of 8 physicians, and receive an average of 2-3 misdiagnoses along the way.
Previously, people were juggling up to 7 apps to track daily symptoms, medications, and more. However, this lacked the structure to interpret users’ daily health context, and failed to provide clarity on which treatments were helping and which ones were making things worse. Juno bridges the gap by connecting this disparate information with previous medical history and daily conversation to identify patterns and triggers that are often missed.
Weeks of conversation are distilled into a structured report for doctors, transforming complex, fragmented health histories into something clear and actionable before every consultation. Juno also helps users manage their energy by gently restructuring their calendars around their health profile, drawing on flare-up history and daily biometrics to prevent overexertion before it happens.
Co-founders Marshall Gould and Isaac Tolley spent the last year conducting research at Oxford and UCL to build Juno’s proprietary engagement layer for daily conversations, allowing Juno to ask the right questions at the right time and understand each user’s health better than anyone else.
Symptom-tracking apps have existed for years. What hasn’t existed, until Juno, is one built specifically and uncompromisingly for people with chronic illness.
Most people in this community have turned to AI chatbots for support, but without knowledge of their medical history, symptom trajectory, or lived experience, the advice they receive is generic, rarely actionable, and often demoralising. Those chatbots weren’t built for them. Juno was. Juno’s approach has been highly specialised to optimise the user experience and provide tailored guidance for each user. It constructs a continuous, structured health profile for every user, finally giving fragmented health data the contextual links it needs to mean something.
The results speak for themselves: Juno has helped patients reach accurate diagnoses, improve their health outcomes, and gain a clearer understanding of their own bodies. Particularly for undiagnosed patients, Juno provides evidence-based clarity over their symptoms so they can make a clinical consultation count and expedite a diagnosis. Consequently, Juno is on track to be the top app for chronic illness management in the coming weeks.
Juno is already at $1.3m in annual run rate, supporting 100,000+ patients globally. Juno is building a future where everyone has a private clinical specialist in their pocket, 24/7.
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