Y Combinator Summer 2024 (S24) Companies

Hexclave is a platform providing authentication, fraud protection, payments, analytics, and other app functionality for developers to integrate user management and engagement features into applications.

1 investor

OpenLoop is a white-label telehealth platform that enables healthcare brands to launch and scale virtual care services. The platform uses AI to streamline clinical workflows, manage patient support, and optimize care pathways across 30+ specialties nationwide.

1 investor

Hyrex is an open-source durable task queue built on Postgres for backend developers to execute asynchronous jobs, scheduled tasks, and AI agent actions within their applications. The platform supports Python and TypeScript SDKs and deploys across AWS, GCP, Azure, and other cloud providers.

1 investor

A web-based 3D art application that uses AI to generate and edit 3D models and textures from text prompts, including tools for refining assets to production quality through upscaling and compression.

1 investor

Intryc provides AI-powered evaluation and quality assurance for customer support interactions at scale. The platform analyzes 100% of incoming support tickets in real-time to deliver quality metrics and customer insights, serving enterprise customer support teams.

3 investors

Invaria automatically generates structured event logs across codebases and routes them to storage without manual instrumentation, serving developers who lack the resources for traditional observability setup.

1 investor

Ionworks provides a Battery Simulation OS that combines physics-based electrochemical modeling with machine learning for battery R&D. The platform turns cycler data into validated models and generates labeled datasets for ML methods, serving cell makers, OEMs, and battery researchers.

3 investors

Kastle builds AI voice agents for consumer lending and loan servicing, automating high-volume phone calls, payments, and borrower inquiries for FDIC-insured banks and mortgage lenders. The platform integrates with existing contact center systems and includes compliance engines pre-trained on lending regulations like FDCPA and RESPA.

1 investor

Keet is a personal learning platform that generates interactive courses on any topic using AI, featuring Duolingo-style lessons with videos, quizzes, and games structured around roadmaps. The product serves learners seeking self-paced education across diverse subjects.

1 investor

Kenley builds AI agents for advisory and financial services firms to automate repetitive tasks including proposal drafting, document creation, and analysis. The platform integrates with Microsoft Office applications and is designed for strategy consulting, life sciences advisory, and investment banking.

2 investors

Kontigo is a stablecoin-based financial platform for emerging markets, offering a self-custody wallet (Kontigo Cash), a USDC-denominated debit/credit card, and a payment acceptance API (Kontigo Pay) that enables businesses to receive international payments in stablecoin and convert to local currency. The platform targets individuals and businesses across Latin America seeking inflation-resistant savings and cross-border payment solutions.

4 investors

Kopra Bio develops cancer immunotherapy technology that converts cancer cells into biofactories to produce their own destruction. The company operates in the biotech and cancer treatment space.

6 investors

Kura AI develops software that enables AI agents to interact with and navigate websites, achieving performance improvements over competing approaches on standard benchmarks.

1 investor

Laminar is an observability and debugging platform for AI agents that captures failures, surfaces root causes, and confirms fixes through trace visualization, automated anomaly detection, and eval-driven development. It serves AI teams building and iterating on agent applications.

1 investor

LedgerUp is an AI billing operations platform for B2B SaaS companies with custom contracts that automates post-signature revenue tasks including contract parsing, subscription creation, invoice generation and submission to procurement portals, payment collections follow-ups, and reconciliation across multiple CRM and accounting systems. The platform reduces Days Sales Outstanding by an average of 35% and saves teams 30–40 hours per month on accounts receivable work.

1 investor

Lighthouz AI provides AI-powered back-office automation for freight brokers, automating freight bill audits, accounts receivable, and collections. The platform helps brokers scale operations without expanding headcount in the $900B freight industry.

2 investors

Ligo develops computational tools for enzyme design by combining large language models with specialized neural networks to enable scientists and AI agents to discover new enzymes and biological functions.

6 investors

Lilac Labs provides voice AI software that handles drive-thru order-taking for quick service restaurants facing labor constraints, replacing the cashier role with an automated system designed to meet accuracy and response-time requirements for customer satisfaction.

1 investor

Lore is an app that generates visual stories and summaries of iMessage conversations for Mac users. Users can view conversation statistics, key milestones, and shareable highlights of their message histories.

1 investor

Lucible is a financial services platform that provides transparency about where customer deposits are held and invested. Customers retain 100% of investment returns while the company charges a subscription fee and offers margin loans at cost.

1 investor

Mage provides transactional diligence services for mergers and acquisitions, automating the review and analysis of legal documents from data room through closing for deal teams and counsel.

1 investor

MagiCode provides an AI agent that generates, audits, and validates frontend code, then submits pull requests on behalf of development teams seeking to reduce manual coding work.

1 investor

Maitai provides software that corrects AI model outputs in real-time and automatically retrains models based on their errors, enabling enterprise customers to deploy more reliable AI applications that improve over time.

1 investor

A native macOS terminal application built on libghostty that features vertical tabs, split panes, notification alerts, and a programmable API for developers working with AI coding agents and terminal-based workflows.

2 investors