Y Combinator Summer 2023 (S23) Companies

Mocha provides a platform with an AI coding agent that allows users to build and publish web applications without writing code. The service targets people who want to develop web apps quickly, from prototyping to launching production applications.

1 investor

Morph provides optimized inference infrastructure for code generation models, enabling fast deployment of open-source models like DeepSeek and Qwen with support for specialized tasks including code editing, search, and compression.

2 investors

OpsNinja provides quality inspection, auditing, and testing services for e-commerce sellers, primarily those on Amazon. The platform integrates with seller accounts to track product performance, returns, and quality metrics through a global network of inspectors and labs.

3 investors

Nanograb develops gene therapy delivery systems using artificial intelligence to identify peptide-nanoparticle combinations that transport genetic medicines to targeted cells and tissues.

3 investors

Nectar builds a utility intelligence platform that aggregates energy consumption data from utility bills and online portals to help companies optimize their energy usage and costs. The platform serves organizations seeking to reduce their energy spend and carbon footprint by providing the data infrastructure needed to identify cleaner energy sources and better rates.

3 investors

Nowadays is an AI-powered platform for corporate event planning that handles tasks from venue sourcing to budget management. The platform aims to make event planning effortless for corporate clients.

2 investors

Numen develops at-home cancer diagnostics and health data collection infrastructure using machine learning models to enable earlier intervention and improve patient outcomes.

3 investors

Obento offers a health-focused experience, though specific details about its service model, customer type, and industry positioning are not clearly stated on the visible page content.

1 investor

Ohmic Biosciences develops engineered proteins and synthetic biology solutions to address diseases in crops. The company creates durable treatments applicable across different agricultural products.

1 investor

Olio Labs develops drug combination therapies using machine learning to identify treatments that target multiple interacting proteins simultaneously, with initial candidates focused on obesity treatment. The company aims to create pharmaceutical solutions that achieve greater efficacy and lower side effect profiles than existing single-target medications.

5 investors

OpenPipe provides an SDK that automatically captures prompt-completion pairs from existing LLM providers and converts them into fine-tuned models that are faster and more cost-effective to run.

1 investor

OpenSteer builds specialized AI agents that perform autonomous work by browsing the web, integrating with user tools, and executing on schedules either in the cloud or on-premises. The platform serves developers and enterprises looking to automate business processes and workflows.

1 investor

OpenTools provides an API that allows developers to access and use Model Context Protocol (MCP) tools with any LLM through a single integration, offering capabilities like web search, real-time location data, and web scraping.

1 investor

Ora is an AI-native medical education platform that provides study tools including question banks, flashcards, and content libraries for medical students preparing for licensing exams like the USMLE. The platform serves medical schools and students across the United States, offering institutional partnerships and study resources.

1 investor

Orbio Earth provides satellite-based methane emission data to financial investors and institutions, replacing traditional estimation methods used in the oil and gas sector. The company uses satellite imagery to monitor methane releases from oil and gas facilities globally, enabling investment firms to assess regulatory compliance risks and identify higher-performing operators.

2 investors

Osium AI develops an AI-powered platform that helps industry leaders accelerate materials innovation and discovery by optimizing experimentation and managing research data. The platform serves companies in the materials science, chemicals, and related industries seeking to improve material performance and sustainability.

2 investors

Outset is an AI-powered research platform that combines conversational AI, behavioral intelligence, and emotional analysis to conduct moderated research interviews and synthesize consumer insights at scale across multiple languages and countries.

5 investors

ParadeDB is a Postgres extension that adds full-text search, vector retrieval, and aggregation capabilities to PostgreSQL databases. It enables developers to consolidate search and analytics workloads into a single database using standard SQL without requiring a separate search engine.

3 investors

Parea provides testing, evaluation, and observability tools for large language model applications. The platform enables teams to track AI system performance, collect human feedback, manage prompts, and deploy LLM apps to production.

1 investor

PeerDB provides fast and cost-effective data replication from PostgreSQL to data warehouses including Snowflake, BigQuery, and ClickHouse, as well as to event queues like Kafka and EventHubs. The open-source tool and commercial cloud service enable change data capture and parallel data migration for engineering and data teams.

2 investors

Pincites develops an AI-powered contract review and drafting tool called LOIS for Word that helps legal teams standardize negotiations, detect risks, and generate redlines within Microsoft Word. The platform is designed for law firms and in-house legal teams.

1 investor

Pointhound helps people book airline flights at 40-90% discounts by using credit card points strategically instead of cash. The platform searches 150+ airlines to find point-redemption deals for consumers and offers premium membership with curated flight digests and booking alerts.

1 investor

Proof of Human is an AI-powered verification service that uses behavioral biometrics to authenticate users in real time without CAPTCHAs. The platform analyzes typing patterns and user interactions to detect fraudulent and AI-generated responses, serving research organizations and enterprises that need to ensure data quality.

1 investor

PropRise provides AI tools for institutional commercial real estate teams to source deals and underwrite faster. The platform uses document analysis and market signal detection to populate underwriting models with traceable, source-linked data.

1 investor