/Companies

Y Combinator Summer 2026 (S26) Companies

234 companies from the Y Combinator Summer 2026 batch, with their investors and founders.

Axelrod

Axelrod provides operational management software for boutique, independent, and luxury hotels and resorts, coordinating daily operations across guest, room, team, and ownership functions within existing systems.

2 investors

Baud

Baud Labs designs specialized AI chips that reduce the computational cost and power consumption of training and serving large language models by replacing multiplication-based arithmetic with addition-based operations. The company provides both custom silicon and a PyTorch-compatible compiler to enable organizations of all sizes to run AI workloads more efficiently.

4 investors

Belvedir

Belvedir provides a platform for training and deploying custom AI models with private hosting and continual learning capabilities. The platform enables companies to collect production data, create training datasets, fine-tune models using reinforcement learning, and improve AI systems in feedback loops controlled by the customer.

2 investors

Bernard

Bernard offers an AI-driven workflow for residential appliance repair shops that answers inbound calls, captures symptoms and checks warranty status, pre-diagnoses jobs, and orders the correct parts ahead of a technician visit. It aims to help repair businesses reduce missed calls and second trips by connecting front office, back office, and field operations.

2 investors

Billow AI Labs

Billow is an AI/ML platform designed for regulated industries. The company serves enterprise clients in sectors such as financial services, energy, and life sciences.

3 investors

Bizmark

Bizmark provides AI intelligence systems for business processes, applied to real-world operational needs.

2 investors

Blaise

Blaise is an AI system that handles the scoping, development, and deployment of enterprise software from start to finish. It serves businesses looking to build custom software applications.

1 investor

Bloomy

Bloomy is an adaptive learning platform that uses AI to teach ELA, Math, and Writing to K-12 students through personalized lessons, live AI tutoring, and mastery-based assessments. The platform serves schools and districts seeking differentiated instruction grounded in learning science.

2 investors

Callbook AI

Callbook AI provides AI agents that contact and negotiate with borrowers across calls, SMS, and email to handle debt collections. It segments accounts by ability and willingness to pay and routes customers to the right next step, serving financial institutions.

3 investors

Care GP

Care GP develops AI-powered automation tools for Australian general practitioner clinics, automating administrative workflows including document management and phone/booking services. The company serves clinic operators seeking to reduce operational costs and overhead.

2 investors

CarSignal

CarSignal is an AI-based all-in-one operating system for auto repair shops, covering intake, diagnostics, estimates, scheduling, and payments in a single workspace. It includes a diagnostic copilot with OEM-grounded reasoning, customer-ready estimates, and live status pages, serving independent and multi-location shops across the US.</parameter> <parameter name="founders">[]

2 investors

Caution

Caution is a verifiable confidential compute platform that deploys sensitive workloads to secure enclaves and provides cryptographic proof that production code matches the reviewed source, build, and configuration. It currently runs on AWS Nitro Enclaves and serves high-assurance workloads such as AI model serving, healthcare data, key management, and blockchain node operation.

2 investors

Cerenovus

Cerenovus unifies scattered corporate data—documents, emails, spreadsheets, chat messages—into a knowledge graph that both people and AI can query, then analyzes organizational workflows to surface operational inefficiencies and recommend improvements for executive decision-making.

2 investors

Chromie

Chromie is an AI workspace for government contractors to find, qualify, and pursue federal and SLED (state, local, education) contract opportunities. It monitors SAM.gov and SLED portals, scores solicitations against a company profile, predicts recompetes, extracts solicitation requirements, and tracks pursuits through award.

2 investors

COACH

Coach is an AI coaching tool for in-person field sales reps that records and analyzes customer conversations to give each rep personalized feedback and one skill to improve at a time. It helps managers prioritize coaching and surfaces team-wide trends, serving field sales teams in retail, home improvement, door-to-door, alarm systems, and roofing.</parameter> <parameter name="founders">[]

3 investors

CoArena

Coasty provides AI agents that automate healthcare revenue cycle tasks like eligibility verification, prior authorization, claim submission, and denial management by performing repetitive work across EHRs, practice management systems, and payer portals through screen interaction. The platform is designed for healthcare billing teams and operates within customer environments with full audit trails and approval gates for payer-facing submissions.

2 investors

Codag

Codag compresses infrastructure logs into concise text patterns so AI agents can debug faster and more efficiently. The tool integrates with coding assistants like Claude Code and other LLMs to reduce token consumption while preserving actionable log context.

3 investors

Computable

Computable operates a marketplace for buying, selling, and redeeming GPU compute hours by calendar week, offering wholesale pricing, standing buyback quotes, and the ability to lock in future capacity at a set price. It targets teams and buyers who need flexible GPU cluster access for defined time periods, using a sealed-bid auction model.

2 investors

Conifer

Conifer provides a routing system that runs large language models locally on user machines first, then intelligently routes queries to cloud models only when needed, reducing token costs and improving inference speed through optimized GPU kernels.

4 investors

Context.dev

Context provides an API that extracts brand color palettes from any domain, returning structured color data with HEX values, RGB/HSL support, and usage weights for developers and product teams building dashboards and marketing tools.

4 investors

Control Seat

Control Seat designs, builds, and deploys industrial control and monitoring systems including PLCs, SCADA, networking, and analytics on a modern AI-native platform. The company serves manufacturers and industrial operators with faster deployment and lean-running systems that improve over time.

1 investor

Cosmic Robotics

Cosmic Robotics develops autonomous construction equipment for critical infrastructure projects, starting with solar installations.

6 investors

Cova

Cova provides home care services, matching caregivers with families and patients while managing insurance billing, enrollment, and administrative tasks across Medicaid, private pay, and long-term care plans. The platform pays caregivers competitively and reduces overhead to make quality care affordable for families.

1 investor

CueBench

Snap Poker operates a real-money online poker app with a built-in social feed where players can share hands as interactive reels with voiceover and grow a following. It serves poker players and uses a game-style monetization model rather than charging rake.

1 investor

Other batches