Proof of Usefulness Report

SlimPay

Analysis completed on 2/16/2026

+663
Proof of Usefulness Score
Category Standard

SlimPay is a legitimate, high-traction fintech company acquired by Trustly in 2023 for ~€70M, serving over 2,000 merchants across Europe. The project demonstrates exceptional real-world utility and verified traction (acquisition, established revenue, significant market share in SEPA payments). However, the submission itself was of very low quality, containing lazy assertions ('everyone', 'most people have used my product') and misplaced data (acquisition price listed as revenue). The score reflects the high value of the underlying business, heavily penalized in the response quality and randomization factors due to the 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+21.25
Audience Reach Impact+15.00
Technical Innovation+9.75
Evidence Of Traction+23.75
Market Timing Relevance+8.00
Functional Completeness+0.25
Subtotal+780
Usefulness Multiplierx0.85
Final Score+663

Project Details

Project URL
slimpay.com
Description
SlimPay simplifies recurring payments for subscription-based businesses across Europe, from mandate digitalisation to payment collection and every step in between. Founded in 2010, we help merchants connect directly with their customers, automating payments effortlessly through SEPA Direct Debit and Open Banking. With a team of over 80 professionals based in Paris and Madrid, we serve more than 2,000 merchants across Europe. Our solutions support businesses of all sizes—from media and utilities to fitness, insurance, and beyond—by optimizing and automating their payment collections. Our goal is to make recurring payments as seamless and cost-effective as possible. Since early 2024, SlimPay is part of the global account-to-account payments platform Trustly Group. With Trustly, we aim to revolutionize the payments world. To contact us: www.slimpay.com/fr/contact/ For more information about Trustly, visit: www.trustly.com

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