Y Combinator Fall 2025 (F25) Companies

Freeport is a self-custodial trading platform offering access to stocks, crypto, commodities, FX, and pre-IPO exposure, with market intelligence from social feeds and insider filings. The platform requires no KYC for basic trading and operates 24/7 including weekends, appealing to retail traders seeking low-friction global market access.

2 investors

Goldbridge is a spend intelligence platform for real estate property owners that identifies and recovers hidden revenue opportunities across property taxes, vendor contracts, utilities, and cash management. The platform connects to existing property management systems to analyze invoices, contracts, and payment flows to uncover savings and increase net operating income.

2 investors

Helonic builds AI software that analyzes 2D construction drawings to identify issues such as coordination conflicts, code compliance problems, and missing information before they reach the field. The platform integrates with Procore and Autodesk to flag drawing issues that typically go undetected in manual plan review, helping construction teams reduce costly rework.

1 investor

Hillclimb develops training data for recursive self-improvement in AI models, focusing on aggregating human research data and automating reinforcement learning environment creation. The company sells the resulting data to frontier AI laboratories.

1 investor

Hypercubic provides AI software for mainframe modernization, helping enterprises and governments rebuild and secure their critical infrastructure systems.

1 investor

Hyperspell builds a context platform that connects to enterprise data sources (Slack, email, documents, CRMs, ticketing systems) and synthesizes them into a unified, permission-aware knowledge graph accessible to AI agents. The platform enables organizations to provide agents with governed access to company-wide information while maintaining data freshness and security.

8 investors

Icarus designs and manufactures solar-powered autonomous aircraft that fly for months at the edge of space. The company serves applications requiring long-duration stratospheric surveillance and monitoring.

7 investors

Imagine AI builds a B2B content platform that helps founders and teams create and manage thought leadership content across social media. The platform combines AI-powered content drafting, persona research, voice replication, and analytics to generate inbound leads and qualified conversations.

2 investors

Item is an AI-native CRM designed to replace traditional customer relationship management systems, built for high-growth companies and teams in go-to-market operations. The platform integrates data from over 100 tools and enables autonomous AI agents to execute sales, support, and success workflows while keeping teams organized with familiar interfaces.

1 investor

Jarmin provides AI employees specialized in analyst roles for investment banking deal teams, handling financial analysis, valuation, quality of earnings, and diligence work. The AI integrates with bankers' existing systems and tools to execute analyst tasks across the M&A and capital markets deal lifecycle.

1 investor

Kaigo is an AI platform that analyzes skilled nursing facility (SNF) finances to identify missed revenue, billing errors, and wasteful spending. The tool detects payer denials, pharmacy billing mistakes, subscription waste, and operational cost overruns, then provides ranked recovery actions for SNF business offices.

1 investor

Kalpa Labs develops generalist audio models capable of following instructions and learning new tasks in context, with initial applications in conversational speech synthesis. The company offers products including a studio interface for multi-speaker dialogue generation, a live conversational model, and API access for developers.

1 investor

Karumi provides an AI agent platform that delivers on-demand product demos to customers 24/7 across multiple languages, with integration to CRM systems for lead tracking and follow-up. The product helps B2B companies close leads by enabling personalized, interactive product demonstrations accessible through landing pages, in-app experiences, and outbound emails.

2 investors

Kestrel provides AI agents for platform engineering that automate incident response, cloud provisioning, CI/CD pipelines, and developer requests through deterministic workflows. The platform enables infrastructure and DevOps teams to build and execute automations using natural language, visual editing, or code across 30+ integrations.

1 investor

Koyal develops an AI platform that generates personalized video content from scripts or audio, serving music labels, podcasters, and production companies. The platform uses agentic AI to handle multilingual workflows, lip-sync synchronization, and consistent character rendering across video sequences.

3 investors

Lakonia builds a command and control platform that uses AI to transcribe radio communications and synthesize intelligence for law enforcement and military personnel.

2 investors

Lapis is an AI-powered platform that automates the creation, launch, and optimization of paid advertising campaigns across channels including ChatGPT, Google, Meta, LinkedIn, TikTok, and Reddit. It serves growth teams by generating on-brand ad creative, landing pages, and performance-driven campaign variations while learning from results to improve campaigns over time.

4 investors

Telemetron provides AI-powered customer support solutions for hardware companies by leveraging device telemetry and large language models to diagnose and resolve hardware issues more efficiently.

1 investor

Leadbay is an AI-native sales intelligence platform that qualifies and discovers leads for sales teams by integrating into Claude, ChatGPT, and Copilot. The platform uses proprietary AI to identify and score high-potential prospects in low-signal markets, particularly targeting SMBs and enterprises seeking better sales prospecting and growth acceleration.

2 investors

Lemma provides production monitoring and observability for AI agents, surfacing failures, aggregating issues, and enabling quick resolution through integrated alerts and context-sharing tools.

2 investors

Lexi builds AI-powered systems for legal teams to automate legal work tasks. The platform enables lawyers to focus on strategic and client-facing work rather than routine administrative functions.

1 investor

Lightberry develops AI software that enables robots to understand and respond to voice commands, allowing non-technical users to control and program robots through conversation rather than traditional coding.

4 investors

Locus provides payment infrastructure and financial access controls for autonomous AI agents, enabling them to purchase API services, compute resources, and tools within programmable spending rules. The platform offers pay-per-use access to 44+ API providers (AI models, data services, search engines) along with agent-native deployment and checkout capabilities, serving AI developers and teams building autonomous systems.

1 investor

Logical is a desktop application that serves as an AI assistant for knowledge workers, automatically offering help across multiple applications to complete writing and administrative tasks while keeping user data local to the device.

1 investor