Proactively engages e-commerce customers post-purchase via SMS to prevent returns.
Using predictive user segmentation for targeting, computer vision for photo/video product analysis, and adaptive dialogue generation for empathetic support.

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E-commerce Customer Support
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YC W26

Last Updated:
March 19, 2026

Builds an AI-powered SMS platform that proactively engages high-value e-commerce customers post-purchase, using LLMs and predictive analytics to resolve issues, prevent returns, and convert refunds into exchanges.
Return Signals has publicly positioned its product around proactive post-delivery SMS engagement, AI-powered conversational support with seamless human escalation, visual support (photo/video analysis), and unified brand dashboards for customer sentiment and product feedback. They publicly highlight 61% engagement rates, 74% response rates, and 1.8-day average resolution times, with a stated goal of delivering 5,10% margin uplift for e-commerce brands.
Behind the scenes, their Terms of Service confirm reliance on Google, OpenAI, and Anthropic AI providers, suggesting a multi-model orchestration approach rather than a single-LLM dependency. The absence of public job postings or engineering blog content signals a stealth-mode, founder-led development phase. Founder Ilya Valmianski's deep background in medical NLP and conversational AI (Curai Health, MDandMe/AuxHealth) suggests proprietary work on context-aware dialogue systems and reinforcement learning for engagement optimization. The lack of Shopify App Store or G2 reviews implies they are operating in a high-touch, white-glove pilot phase with select enterprise brands,likely building case studies before a broader GTM push. Conference and YC Demo Day signals point toward omnichannel expansion (WhatsApp, email, chat) and deeper e-commerce platform integrations as near-term priorities.
<p>Predictive High-Value Customer Identification & Proactive Engagement</p>
The AI figures out which customers are most valuable and reaches out to them first after delivery, before they even think about returning something.
Return Signals uses predictive machine learning models to score and segment customers by lifetime value, purchase history, product category risk, and behavioral signals. When a delivery event is detected, the system automatically triggers a personalized SMS check-in to high-value users at the optimal time window. The AI prioritizes outreach based on predicted churn risk and return propensity, ensuring that the most at-risk, highest-value customers receive proactive engagement first. This predictive layer is what enables their reported 61% engagement rate—far above industry norms—because the system is not blasting generic messages but rather targeting the right customer with the right message at the right moment. The model continuously retrains on engagement outcomes, refund/exchange conversions, and customer sentiment to improve segmentation accuracy over time.
It's like a maître d' who memorizes every VIP guest's favorite table and greets them by name before they even reach the door.
<p>Visual AI for Product Issue Diagnosis & Resolution</p>
When a customer texts a photo of a damaged or wrong item, the AI instantly analyzes the image to figure out what's wrong and suggests a fix or exchange—no human needed.
Return Signals enables customers to send photos and videos directly via SMS, which are processed by visual AI models to automatically diagnose product issues such as damage, defects, incorrect items, or sizing mismatches. The computer vision pipeline classifies the type and severity of the issue, cross-references it against the customer's order details and product catalog, and generates a recommended resolution (replacement, exchange, discount, or escalation to a human agent). This eliminates the back-and-forth typically required in text-only support, dramatically reducing resolution time to their reported 1.8-day average. The visual AI also feeds aggregated defect data back to brands, enabling product quality insights at scale. By automating the visual triage step, Return Signals reduces the need for human agents to review routine cases, cutting operational costs while maintaining high customer satisfaction. The system leverages multimodal LLMs (likely GPT-4V or Gemini Vision) combined with custom fine-tuned classifiers for product-specific defect detection.
It's like having a doctor who can diagnose your problem just by looking at a photo you texted, then immediately writing the prescription.
<p>Context-Aware Conversational AI with Adaptive Tone & Escalation</p>
The AI chatbot doesn't just answer questions—it reads the customer's mood and adjusts its tone like a skilled human agent, knowing exactly when to handle things itself and when to bring in a real person.
Return Signals deploys large language models fine-tuned for e-commerce customer support conversations via SMS, with a sophisticated adaptive tone system that adjusts formality, empathy, and urgency based on real-time sentiment analysis of the customer's messages. Drawing on founder Ilya Valmianski's extensive background in medical conversational AI—where tone and empathy are clinically critical—the system goes beyond generic chatbot responses to deliver what the company calls an "AI-powered luxury concierge" experience. The dialogue engine maintains full conversation context across multiple exchanges, references order history and prior interactions, and dynamically selects response strategies (reassurance, solution proposal, upsell, or escalation). A reinforcement learning layer optimizes the escalation threshold: the model learns over time which conversation patterns are best resolved by AI versus human agents, minimizing unnecessary escalations while ensuring complex or emotionally charged cases reach a human quickly. This hybrid approach allows Return Signals to handle the vast majority of interactions autonomously while preserving the high-touch feel that luxury and premium e-commerce brands demand.
It's like a customer service rep who can tell you're frustrated before you even say it, switches from cheerful to empathetic on a dime, and knows exactly when to say "let me get my manager" without you having to ask.
Ilya Valmianski's rare combination of PhD-level ML research, production conversational AI experience in healthcare (where accuracy and empathy are critical), and prior founder experience gives Return Signals a technical edge in building nuanced, context-aware AI agents that feel human,applied to the high-stakes, high-margin world of e-commerce customer retention.