Y Combinator Winter 2023 (W23) Companies

Langfuse is an open-source AI engineering platform that helps teams build and monitor production-grade LLM applications. It provides observability and analytics for teams building with large language models and generative AI.

2 investors

Latent builds software to optimize the prescription fulfillment process for health systems, enabling faster access to medications for patients. The platform serves hospital pharmacy operations and medication access workflows.

5 investors

Lavo Life Sciences offers computational molecular simulations to pharmaceutical companies, helping them optimize drug formulations, reduce experimental costs, and accelerate the path to clinical trials and regulatory approval.

3 investors

Layup builds AI-powered automation software that guides users and acts on their behalf within complex applications, reducing adoption friction and support needs. The product targets software companies and their end-users across enterprise and consumer applications.

1 investor

Lightski builds AI agents that audit and rebuild business workflows across document intake and back-office operations to automate work processes and improve business outcomes.

1 investor

LinkGrep is an AI browser copilot that helps teams collaborate by automatically tracking shared links, suggesting relevant information from knowledge bases during browsing, and surfacing needed resources before meetings. It serves teams working in web browsers and aims to improve knowledge sharing and collaboration workflows.

1 investor

Linum builds generative video models for animation that provide creative controls like consistent characters, camera movement, and motion control. The company aims to make animation more accessible to creators by baking these primitives into model training rather than bolting them on through fine-tuning.

3 investors

LiteLLM provides an AI gateway that simplifies access to over 100 large language models through a unified OpenAI-compatible interface, with built-in features for fallbacks, spend tracking, and load balancing. The platform serves developers and engineering teams integrating multiple LLM providers into their applications.

1 investor

Littio is a mobile app that offers multi-currency accounts in USD, EUR, and COP with international payment capabilities, including a Mastercard for spending across 200+ countries and digital asset holdings in stablecoins. It serves individuals in Latin America who need to receive international payments, transfer funds across borders, and earn yields on their holdings.

5 investors

Loopfour provides finance automation software that enables organizations to automate workflows such as invoicing, contracts, payments, and reconciliations while maintaining control through triggers, integrations, and approval mechanisms.

1 investor

Loula connects families with doula care services covered by insurance, including Medi-Cal and commercial health plans. The company aims to improve perinatal health outcomes and maternal health equity for underserved communities.

3 investors

Luca provides AI-powered pricing optimization software for retail businesses, analyzing sales data to identify opportunities for revenue and profit improvement and recommending price adjustments to capture additional margin.

1 investor

Lume built software to automate customer data integration for engineering teams, using AI to discover schemas, map data, validate quality, and generate code automatically. The company has closed operations.

1 investor

Lynx provides an AI platform that automatically diagnoses and remediates engineering incidents in production environments, such as data anomalies and outages, by gathering information and identifying root causes. The platform helps engineering teams reduce downtime and incident resolution time.

1 investor

Magic Patterns generates user interface designs that match existing product styling and enables rapid prototyping of new features. The platform serves product teams and designers who need to explore design ideas, test features with customers, and collaborate on prototypes.

2 investors

Magicflow provides a platform for running large-scale experiments and refining generative AI workflows, serving prompt engineers, visual artists, and data scientists working with AI systems.

1 investor

MagnaPlay provides software that automates game translation for developers using AI and human translators, reducing the time and cost typically required to localize games for international markets.

1 investor

Mantys provides SaaS companies with tools to calculate and project annual recurring revenue by integrating data from sales and billing systems, eliminating manual spreadsheet processes.

2 investors

Matano provides a cloud-native security information and event management platform that uses a Security Data Lake architecture as an alternative to traditional SIEM systems like Splunk or Elastic. The platform targets security teams operating in cloud-first environments.

1 investor

Maxi is a financial management app that operates through iMessage conversations, providing users with proactive financial insights, spending reminders, and automated handling of recurring financial tasks.

1 investor

Mercoa provides B2B payment solutions, specifically AI-powered billing and invoicing tools, for SaaS platforms to embed into their product for their end customers. The platform offers both backend and frontend SDKs to help vertical SaaS companies launch branded payment experiences and unlock new revenue streams from payments monetization.

2 investors

Metal is an AI context platform that structures company data into a queryable knowledge graph and serves it to AI tools via an open API and Model Context Protocol server. It enables technical teams to build AI features faster by providing a unified, permission-aware foundation connecting existing systems without replacing current tools.

1 investor

Metal is a platform that uses proprietary intelligence to identify and rank investors aligned with a company's fundraising round and investment thesis. The service helps companies define their profile and discover relevant investor prospects.

3 investors

Middleware is a cloud observability platform that integrates logs, traces, and metrics to help organizations identify and resolve infrastructure issues rapidly. The platform serves cloud-native businesses seeking to modernize their infrastructure monitoring with scalable, cost-effective observability tools.

5 investors