Proof of Usefulness Report

Car Next Door

Analysis completed on 1/16/2026

+501
Proof of Usefulness Score
Industry Mainstay

Car Next Door (rebranded as Uber Carshare) was a highly successful Australian P2P car-sharing platform acquired by Uber in 2022 for ~$105M AUD. However, Uber announced the shutdown of the service in September 2024 due to operational challenges. While the project achieved massive historical traction (1.1M+ users) and a successful exit, the submission itself is of extremely low quality, containing vague claims ('everyone', 'most people') and failing to detail the technology. The score reflects the high historical value and verified scale, heavily penalized by the current defunct status and poor submission effort.

Ready to Compete for $150k+ in Prizes?

Move this data into a HackerNoon blog draft to become eligible for your share of $150k+ in cash and software prizes

View All Reports

Score Breakdown

Real World Utility+87
Audience Reach Impact+90
Technical Innovation+37
Evidence Of Traction+250
Market Timing Relevance+10
Functional Completeness+2
Subtotal+477
Usefulness Multiplierx1.05
Final Score+501

Project Details

Project URL
carnextdoor.com.au
Description
Car Next Door, accessible via carnextdoor.com.au, is an Australian peer-to-peer car-sharing platform that connects car owners with individuals who need to rent a vehicle. The company offers a convenient and cost-effective alternative to traditional car rental services by allowing car owners to list their vehicles for rent when they are not in use. Renters can browse available cars in their area, book them online, and access them using a smartphone app. Car Next Door aims to reduce the number of cars on the road, promote sustainable transportation, and provide a flexible mobility solution for urban dwellers.
Audience Reach
everyone
Target Users
everyone
Technologies
Decentralization, Mobileappdevelopment
Traction Evidence
most people have used my product

Algorithm Insights

Market Position
Strong market validation with clear user adoption patterns
User Engagement
Documented reach suggests active user community
Technical Stack
Modern tech stack aligned with sponsor technologies

Recommendations to Increase Usefulness Score

Document User Growth

Provide specific metrics on user acquisition and retention rates

Showcase Revenue Model

Detail sustainable monetization strategy and current revenue streams

Expand Evidence Base

Include testimonials, case studies, and third-party validation

Technical Roadmap

Share development milestones and feature completion timeline