Y Combinator Winter 2024 (W24) Companies

Preloop provides tools to automate the deployment of machine learning models from experimental stages into production environments, enabling teams to focus on model development rather than infrastructure work.

1 investor

Pretzel AI develops artificial intelligence products for businesses to improve understanding, decision-making, and operations.

1 investor

PromptArmor provides a security platform that protects enterprise organizations from AI-specific security threats and vulnerabilities. The company focuses on novel AI security challenges that traditional cybersecurity solutions do not address.

3 investors

ProSights provides data transformation and AI-readiness services for enterprise workflows, turning complex business data into structured, actionable formats. The company serves finance professionals, data scientists, and alternative asset managers through custom data migration, document ingestion, and reconciliation solutions.

1 investor

Quary provides an in-browser platform for analytics engineering that allows data analysts to develop, test, and deploy data models without leaving their browser, enabling them to work more independently from data engineering teams.

1 investor

Quivr provides an AI-powered system that integrates with helpdesk platforms like Zendesk to help support teams draft and automate customer responses while handling ticket resolution. The tool aims to reduce manual work and speed up how quickly support issues are closed.

2 investors

Doomscrollr is a social platform that enables users to share content directly with their audience without algorithmic curation or content moderation constraints. The service targets creators and communities seeking uncensored, direct-to-fan engagement.

1 investor

Raindrop provides observability and monitoring for AI agents, capturing traces of production runs including messages, tool calls, retries, and errors. The platform helps engineering teams detect silent failures, auto-fix issues, and integrate monitoring directly into Slack workflows.

3 investors

Reducto provides document processing APIs that parse, classify, extract, and edit data from documents at enterprise scale. The platform combines OCR and vision language models to transform unstructured documents into structured data for AI teams across finance, healthcare, legal, and other industries.

3 investors

Reform provides an AI-powered platform that automates document extraction, customs compliance, and other freight operations tasks. The platform integrates with existing systems to help logistics and freight businesses save time and reduce manual processing.

1 investor

Relari builds an AI development platform called Nuvi that enables developers to define intelligent agents in plain English without prompt engineering or visual programming. The platform creates testable, verifiable AI agents designed for production deployment.

1 investor

Renderlet provides a procedural 3D modeling platform that enables developers and artists to create complex 3D designs, shapes, and animated effects by combining functions and primitives. The toolset supports real-time generation for game engines, applications, and other digital projects, with AI that maintains the semantic structure of procedurally generated content.

1 investor

Reprompt builds a digital replica of Earth using AI and location technology. The company serves customers seeking advanced geographic and spatial intelligence capabilities.

2 investors

Resonance provides a content repository for marketing campaigns that tailors messaging to individual recipients and automatically archives and recycles effective variations.

1 investor

Respan provides infrastructure for teams to trace, evaluate, and monitor AI agent workflows in production at scale. The platform helps developers and enterprise teams operate large language model applications reliably through observability and quality improvement tools.

2 investors

RetailReady builds an AI-powered platform that uses large language models and computer vision to automate warehouse compliance and shipping practices for brands and retailers. The technology helps companies avoid revenue loss from compliance chargebacks in the $40 billion retail compliance market.

3 investors

Retell AI builds an enterprise-grade voice AI platform that handles phone calls for industries including healthcare, delivery, and insurance. The platform enables businesses to automate customer-facing voice interactions.

2 investors

Risotto is an AI help desk platform for internal support across multiple departments (IT, HR, Finance, Legal, Security) that automates repetitive questions, routes tickets, and manages access control by integrating with knowledge bases and communication tools like Slack and Teams.

5 investors

Roe provides fraud detection and risk management software that identifies emerging fraud patterns and coordinated activity across a portfolio of transactions, using typology analysis and real-time monitoring for financial institutions and payment platforms.

2 investors

Rove is a travel rewards platform that allows users to earn and redeem miles on flights and hotel bookings through shopping at partner stores and booking travel directly. The company offers competitive redemption rates and direct supplier deals to leisure travelers.

2 investors

Ryse operates an online marketplace connecting real estate owners and property managers with financial institutions to access customized financial products, particularly solutions that allow landlords to access rental income early to manage cash flow needs.

3 investors

Saga deploys AI agents to automate patient access back office work for healthcare practices, health systems, and medical groups. The platform reads and processes referrals, faxes, and forms, then takes action directly in electronic health record systems.

1 investor

1 investor

Salvy provides virtual mobile phone numbers and corporate mobile plans for businesses. The platform offers integration with Meta's official API via webhooks for simplified activation without physical SIM cards.

1 investor