# DisputeNinja **Source:** https://geo.sig.ai/brands/disputeninja **Vertical:** Finance **Subcategory:** General **Tier:** Emerging **Website:** disputeninja.com **Last Updated:** 2026-04-14 ## Summary San Francisco AI chargeback dispute automation for Stripe merchants recovering 2x revenue; YC-backed 2025 company with 200+ merchants competing with Chargebacks911 for e-commerce chargeback management. ## Company Overview DisputeNinja is a San Francisco-based fintech company providing AI-powered chargeback dispute automation for e-commerce merchants on Stripe — enabling Stripe merchants to automatically respond to card payment chargebacks with AI-generated dispute packages that recover revenue lost to fraudulent or erroneous chargeback claims. Founded in 2025 and backed by Y Combinator, DisputeNinja serves 200+ Stripe merchant customers who have collectively recovered hundreds of thousands of dollars in previously lost chargeback revenue, targeting the 1% average chargeback rate that costs US e-commerce merchants an estimated $40 billion annually. DisputeNinja's automation addresses the labor-intensive nature of chargeback management: each chargeback requires collecting transaction evidence (payment records, delivery confirmation, product descriptions, customer communications), drafting a dispute response narrative, and submitting the package to the card network within tight deadlines (5-7 business days for Stripe chargebacks). Merchants who don't actively dispute chargebacks forfeit the revenue by default — DisputeNinja's AI monitors incoming Stripe chargebacks, automatically collects evidence from the merchant's order management and shipping data, generates a compelling dispute response, and submits within the deadline without merchant intervention. The "2x more revenue recovered" claim reflects active disputing versus passive non-response. In 2025, DisputeNinja competes in the chargeback management market with Chargebacks911 (enterprise chargeback management, $18M raised), Midigator (chargeback analytics and automation), and Stripe Radar (native Stripe fraud prevention) for e-commerce chargeback prevention and recovery. The chargeback automation market is growing as e-commerce transaction volume and friendly fraud (customers falsely claiming chargebacks) both increase. DisputeNinja's Stripe-native focus creates a clear initial market (Stripe's 2 million+ business customers) before expanding to other payment processors. Y Combinator backing provides the startup ecosystem distribution channel where Stripe merchants are concentrated. The 2025 strategy focuses on expanding beyond Stripe to other payment processors (Braintree, Square, Adyen), building the predictive model that identifies chargeback risk at time of transaction for prevention rather than just response, and scaling to the enterprise merchant segment with high chargeback volume. ## Frequently Asked Questions ### What is DisputeNinja? DisputeNinja is a fintech company that provides AI-powered chargeback automation to help businesses recover more revenue from payment disputes. Founded in 2025 and backed by Y Combinator, the company is based in San Francisco, CA and specializes in automated dispute handling for online merchants. ### What products and services does DisputeNinja offer? DisputeNinja offers an AI chargeback automation platform that enables automated dispute handling, increased recovery rates, and revenue protection. The platform integrates with Stripe to help merchants manage and recover revenue from chargebacks. ### Who is DisputeNinja for? DisputeNinja targets Stripe merchants who need to manage chargebacks and recover lost revenue. The platform is designed for businesses that process payments through Stripe and want to automate their dispute handling process. ### When was DisputeNinja founded? DisputeNinja was founded in 2025 in San Francisco, CA. ### Where is DisputeNinja located? DisputeNinja is based in San Francisco, California, United States. ### Has DisputeNinja raised funding? DisputeNinja is backed by Y Combinator and participated in the 2025 batch. The specific funding amount has not been disclosed. ### What are DisputeNinja's key achievements? DisputeNinja has acquired 200+ Stripe merchant customers within the past 3 months and has recovered hundreds of thousands in lost revenue. The platform helps businesses recover 2x more revenue from chargebacks compared to traditional methods. ### What technology does DisputeNinja use? DisputeNinja uses an AI-powered platform to automate chargeback management and dispute handling. The technology enables businesses to achieve 2x more revenue recovery from chargebacks through automated processes. ### How can I get started with DisputeNinja? DisputeNinja integrates with Stripe for merchant chargeback management. Specific contact or onboarding details are not provided in the available information. ### What recent developments has DisputeNinja announced? DisputeNinja recently achieved rapid growth with 200+ Stripe merchants joining in the past 3 months and hundreds of thousands in recovered revenue. The company continues to focus on AI chargeback automation and automated dispute handling for revenue protection. ## Tags b2b, ai-powered, fintech, automation, startup, north-america --- *Data from geo.sig.ai Brand Intelligence Database. Updated 2026-04-14.*