Siggy raises $6 million to track mental health patients between visits

Siggy is the second act for two founders who previously built businesses that deliver treatment outside a traditional doctor's office. Sabbagh co-founded Journey Clinical, which supports practices offering ketamine-assisted psychotherapy, and Engesæth co-founded Nurx, which he said grew to more than 2 million patients and an annual revenue run rate exceeding $100 million before merging with Thirty Madison in 2022. The two had considered starting a company together for years.

The gap Siggy targets is a structural one in mental healthcare: therapists and the clinicians prescribing medication often work separately, so a patient may see a therapist weekly but a prescriber only briefly every few months. Siggy's answer is to keep a conversation going between visits and compress it into a daily score, which the software flags for a clinician to review when it changes. Patients can continue seeing their existing therapists while using Siggy, and a planned feature would let them share information with other providers and involve loved ones in their care.

Investors pointed to both the founders' track record and the insurance-based model. Village Global's Amrit Rao said pairing the vision with insurance makes the ambition about access as much as technology, and Immad Akhund, a repeat backer of both founders, cited the longer-term aim of using AI to detect changes in brain health early. The company recently began accepting paying patients ahead of its public launch.