Doji

Doji operates a smart trade-in and marketplace platform that enables retailers and buyers to exchange, verify and resell refurbished smartphones and tablets, providing AI diagnostics, logistics, reporting and warranty support to extend device lifecycles.

Circularity Relevance

Core

Platform explicitly enables trade-in, resale and sale of refurbished smartphones - core circular activities that extend product lifetimes and enable reuse. Source: Doji Website, 2025

Circular Role

DirectEnabler

Doji operates the trade‑in flows and marketplace directly (implements collection, pricing, verification and matchmaking between sellers, stores and buyers). Source: Doji Website, 2025

Circular Type

Marketplace

• Products

• B2B

• B2C

Doji runs a marketplace and trade‑in system for physical products (smartphones/tablets), facilitating transactions between retailers/buyers and end consumers. Source: Doji Website, 2025

R Strategy

R3 - Reuse, R5 - Refurbish, R4 - Repair

Primary focus is reuse/resale (R3). Secondary evidence supports refurbishment (R5) and repair/diagnosis (R4) via verification, diagnostics and warranty for refurbished devices. Source: Doji Website, 2025

Circular Business Model

Resale / Second-hand, Take-back / Buy-back

Core offerings: trade‑in/take‑back programme and an online marketplace for buying and selling refurbished handsets (resale). Source: Doji Website, 2025

Organisational Type

ForProfit

Commercial business model: charges fees per trade, works with retail partners and buyers, and markets services to stores and sponsors. Source: Doji Website, 2025

Sector

Electronics & IT Hardware, Retail & Consumer Goods

Website describes Doji as a trade-in and marketplace for refurbished smartphones and services for retailers and buyers (trade-in programme, marketplace, logistics). Source: Doji Website, 2025

Geographical Reach

International

• United Kingdom

Site uses a UK domain and references 'Doji TIAAS UK' while other assets (app ID and Portuguese content) indicate activity beyond a single country; evidence suggests multi-country operations. Source: Doji Website, 2025; Google Play, 2025

Hardware Component

None

Service relies on software, AI verification and third-party diagnostic tools (e.g., Phonecheck) rather than supplier‑owned specialised hardware. No evidence of Doji supplying/installing specialised hardware. Source: Doji Website, 2025

Tech Map Relevance

Doji operates a trade-in and refurbished smartphone marketplace which directly enables reuse and resale of electronic devices and therefore meets inclusion criteria for the Circular Tech Map. Source: Doji Website, 2025

Enablers are initially categorised by an AI agent, then verified by a real human.
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Added: 07 Jun 2024

Updated: 21 Oct 2025