Leadership & Team

The people behind Therasize Limited.

The team building Therasize and Anxiety Fitness across clinical design, product, community, and go-to-market strategy.

Fiorinta Lekkai

Co-Founder & Clinical Lead, Therasize

Fiorinta Lekkai, known as Fiori, is a Cognitive Behavioural Therapist (CBT) and mental health innovator, serving as Co-Founder and Clinical Lead at Therasize.

With a deep understanding of clinical workflows and client challenges, she brings her frontline therapy experience into the heart of Therasize's design and functionality.

Fiori partnered with Peter Ruppert in 2023 to co-found Therasize, recognizing the widespread inefficiencies in therapy homework management and client engagement. Her clinical insight has been instrumental in shaping Therasize into a dual-sided platform that serves both therapists and clients, enabling therapists to easily build or assign mental health tools, and clients to receive personalized, actionable support between sessions.

Fiori also curates therapist-generated content within Therasize and leads clinical development for features such as exposure goals and outcome tracking. Her vision ensures the platform remains grounded in evidence-based practices while staying flexible and intuitive for both practitioners and users.

In 2025, Fiori launched the social media brand @notyourpsychotherapist, leveraging digital platforms to share therapy-aligned insights and further expand access to mental health education.

Balancing clinical excellence with a deep empathy for the client journey, Fiori is dedicated to reimagining how therapy is delivered and experienced in the digital age.

Peter Ruppert

CEO & Co-Founder of Therasize

Peter Ruppert is a mental health advocate and entrepreneur who transformed his personal journey through anxiety and panic disorders into a mission-driven career.

As the founder and CEO of Therasize, he leads the development of a groundbreaking platform designed to revolutionize therapy management by eliminating outdated, disorganized therapy workflows.

Peter's passion for mental health advocacy began with his own lived experience. He battled multiple anxiety disorders, including Panic Disorder with Agoraphobia. This journey led him to share his story online, ultimately building a social media audience of over 1.6 million followers under the brand @anxiety_fitness.

Therasize originated from Peter's own need for a better way to manage therapy tools and panic tracking. Initially developed as a simple app called Panic Diary, it evolved into Therasize, a comprehensive mental health platform that allows therapists to generate, assign, and track customized therapy tools with real-time client insights.

The platform is designed for both therapists and individuals, enabling a streamlined and collaborative therapeutic experience. Peter's unique approach blends lived experience with product innovation, making him a rare founder who understands the mental health system from both the patient and provider perspective.

His leadership at Therasize aims to reshape the future of mental health tools, making therapy more effective, engaging, and accessible.

Xann Schwinn

Product Strategy Advisor, Therasize | CEO of Biiah & Singforce | Co-Founder, Cambridge Female Founders Network

Xann Schwinn is an award-winning healthtech entrepreneur and product strategist whose work centers on transforming health and wellbeing through creative, community-driven innovation.

As Product Strategy Advisor to Therasize, she brings deep experience in user-led design and digital engagement to support the platform's mission of empowering therapists and improving outcomes in high-intensity cognitive behavioural therapy (CBT).

Xann is the Founder and CEO of Biiah, a music healthtech platform that enhances adult health and happiness through the power of singing. Recognized by Techstars, SXSW, and Innovate UK, Biiah merges behavioural science and technology to foster long-term wellbeing.

She also leads Singforce, a nationwide workplace wellness programme that delivers singing for health sessions to organizations across the UK. In addition, Xann co-founded the Cambridge Female Founders Network, a grassroots initiative supporting women entrepreneurs across the Cambridge innovation cluster.

At Therasize, Xann's role is critical to shaping a platform that reflects the needs of real-world clinicians and clients alike. Her cross-sector insights help ensure Therasize delivers not just functionality, but meaningful transformation in therapeutic practice.

Tom Parker

SaaS GTM Advisor, Therasize | Commercial Strategy & Revenue Architect

Tom Parker is a seasoned SaaS operator and commercial strategist with over a decade of experience leading high-growth go-to-market initiatives across B2B software.

As GTM Advisor to Therasize, Tom plays a key role in shaping the company's commercial roadmap, ensuring that its therapist-first mental health platform scales with clarity, efficiency, and market alignment.

With a background spanning sales architecture, revenue operations, and early-stage advisory, Tom brings deep tactical and strategic insight to every stage of the growth journey, from customer discovery and positioning to pricing strategy and predictable revenue design.

At Therasize, Tom advises on go-to-market execution, monetisation, and customer lifecycle planning, helping the team navigate the complex mental health and digital therapeutics space with precision.

As a trusted advisor to Therasize, Tom reinforces the business's commitment to delivering scalable, sustainable solutions to one of healthcare's most urgent challenges: bridging the gap between therapy sessions to drive better mental health at scale.