Y Combinator Summer 2025 (S25) Companies

Acrely builds custom enterprise voice agents for customer service, sales, and operations use cases. The company offers both cloud and on-premises deployment options for organizations implementing AI-powered voice solutions.

1 investor

Adaptional is an AI-powered claims quality review platform that audits insurance claims in real time to identify compliance gaps, leakage, and reserve issues. It connects to claims systems and continuously evaluates claims against customizable scorecards covering compliance, coverage, reserves, and subrogation.

1 investor

AgentMail provides an email inbox API that enables AI agents to create and manage their own email accounts. The platform serves developers building AI agents that need email communication capabilities.

2 investors

Alara operates a marketplace that consolidates product inventory and pricing from multiple suppliers, allowing dental practices to compare costs and purchase from various vendors through a unified ordering interface.

1 investor

Albacore develops mass-producible long-range drone submarines (Ghostfin platform) designed for military autonomous underwater operations. The systems use commercial off-the-shelf components and advanced propulsion technology to enable extended transit and loiter times, with embedded autonomous navigation and analytics for remote mission execution.

3 investors

Alter provides an authentication layer and vault for AI agents to securely access third-party APIs and SaaS platforms. The platform handles OAuth tokens, API keys, fine-grained access policies, and audit logging through a single SDK.

1 investor

Altur provides AI-powered calling agents optimized for debt collection and banking sales in Latin America, delivering higher contact and conversion rates than traditional dialers. The platform features adaptive conversation capabilities, account context retention, and compliance monitoring for financial services operations.

4 investors

Ambral provides a customer intelligence engine that analyzes account behavior to identify revenue opportunities, churn risks, and recommended actions for enterprise and scale-up sales teams.

2 investors

1 investor

Astor provides AI-powered investment advisory services for retail investors at all account sizes. The platform delivers personalized financial guidance through an AI advisor, addressing the traditional gap where professional wealth management has been accessible only to wealthy individuals and institutions.

2 investors

Autosana provides automated end-to-end testing for mobile and web applications, generating and executing tests directly from code changes across iOS, Android, and web platforms. The service integrates with development workflows to verify features work correctly before deployment, producing video evidence of test results in pull requests.

2 investors

Autumn provides usage tracking, gating, and billing infrastructure for software companies. It serves as a centralized platform handling both self-serve and enterprise payment models.

3 investors

Avelis audits medical claims using AI and clinician review to identify billing, coding, and contract errors for health plans and third-party administrators. The company uses voice AI agents to automate recovery negotiations and dispute resolution with providers.

3 investors

Avent builds an AI operating system for industrial commerce that automates order processing, quotations, and fulfillment workflows for distributors and manufacturers. The platform uses agents that integrate into existing workflows to handle administrative sales work and connect supply chain participants into an intelligent system.

1 investor

b12 develops AI agents and lab automation software to help chemists plan, optimize, and execute the synthesis of complex molecules. The platform combines chemistry expertise with agentic AI systems to streamline organic synthesis workflows.

3 investors

Bitrig is an AI-assisted development tool for building native applications. Built by former members of Apple's SwiftUI team, it enables developers to create high-quality, polished apps with reduced complexity.

1 investor

Bizzy is an AI receptionist service that answers business calls, books appointments, and manages customer inquiries 24/7. It serves service-based businesses and integrates with scheduling platforms like Square, MindBody, and Vagaro.

1 investor

Blank Bio develops RNA foundation models for precision oncology, helping pharmaceutical companies identify the right patients for clinical trials and predict disease progression using bulk RNA-seq data. The company applies AI to patient selection and disease trajectory modeling to improve clinical trial outcomes.

5 investors

A keyboard application for iPhone that uses voice dictation, powered by OpenAI's ChatGPT, to enable faster text input through speech.

2 investors

BootLoop is an AI agent for firmware development that automates hardware understanding, code generation, testing, and debugging across multiple toolchains and embedded platforms. It serves firmware teams in aerospace, defense, medical devices, and semiconductor industries.

3 investors

Burnt builds AI agents for food distribution and supply chain operations, automating manual workflows and inventory management tasks that have historically relied on legacy tools and spreadsheets. The platform targets food distributors, importers, and operators seeking to modernize their operational infrastructure.

2 investors

Cactus Compute provides an on-device AI runtime for speech, vision, and text models that automatically routes between on-device and cloud inference based on complexity and audio quality. The platform enables developers to deploy speech transcription, voice assistants, and LLM applications across mobile, desktop, and wearable devices with privacy-first architecture.

3 investors

CareSwift is a software platform for emergency medical services that automates ambulance documentation and billing workflows. The company serves paramedics and ambulance services, particularly in the 9-1-1 system in New York City.

1 investor

Certus AI provides an AI phone system that answers incoming calls for restaurants, takes orders, upsells menu items, and integrates directly with POS systems. The service operates 24/7 to capture missed orders and reduce labor costs.

1 investor