How Retapp’s AI and design are revolutionising e-waste management

About this episode

This episode discusses how Retapp is addressing the e-waste crisis through innovative technology and sustainable practices.

This episode of the Cambridge Tech Podcast tackled one of the industry's most overlooked crises: electronic waste. We spoke with Sonia Lange Ramontja, founder of Retapp, about building a sustainable business that's as profitable as it is purposeful. Here's a sobering statistic: e-waste constitutes 70% of all toxic waste globally , yet it remains largely invisible in mainstream conversations. Sonia recognised this gap and built Retapp to address it.   Retapp ran a successful pilot from July to September 2025, collecting 860 kilos of electronics across five pop-up events in collaboration with Cambridge City Council. The product is now live on both App Store and Google Play.   Retapp's platform combines consumer-friendly design with intelligent automation: Users scan devices using the app (phones, laptops, toasters—anything with a plug or battery) AI identifies categories, estimates weight, and calculates resale value or eco-points Users choose drop-off or collection options Optional data erasure certificates available for enhanced security Sustainability metrics track environmental impact Retapp also provides detailed device insights to refurbishers and recyclers through…

People in this episode

Hosts: James Parton, Faye Holland

Guest: Sonia Lange Ramontja

Topics covered

• e-waste management
• sustainability
• circular economy
• technology
• business innovation

Keywords

• e-waste
• sustainability
• AI
• circular economy
• Retapp
• electronic waste
• environmental impact

Mentioned in this episode

Organizations: Retapp, Cambridge City Council

Places: EU

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