Y Combinator

Artisan is an AI-powered outbound sales platform built around Ava, an autonomous AI BDR agent. Ava sources leads from a 250M+ B2B contact database, enriches prospects using 22+ data sources, writes unique personalized emails, handles objections, and books meetings without human intervention. The platform includes built-in web scraping with proxy management and offers a free starting tier.

Cursor is a coding agent platform that unifies an editor, CLI, and cloud-based agents running in isolated VMs. Cloud agents build and test code with MCP server support, integrate with Slack, and run headless in CI/CD pipelines under managed infrastructure.

Replit is a browser-based development platform for building, testing, and deploying AI-powered applications. It offers a template library with pre-built quickstarts for LLM chatbots, Slack workspace integrations, and onchain agents, supported by a built-in secrets manager and one-click deployment.

Run multiple AI coding agents in parallel on your Mac for efficient software development.

Spur is a testing platform that uses autonomous agents to plan, execute, and report tests, aiming to ensure every release is production-ready. Its published bug findings include a subscription plan page caught displaying raw template text instead of rendered content.

Mercura is an AI-driven inside sales automation tool built for distributors and manufacturers. It combines a conversational voice agent with human-in-the-loop routing to handle customer orders, pricing inquiries, delivery-time checks, and product recommendations. The platform integrates with existing systems via OData/REST APIs and a dedicated Salesforce REST connector. According to the vendor, over 40 distributors and manufacturers use Mercura to reduce manual quote-and-order overhead and capture revenue otherwise lost to slow response times. German-language documentation is available, suggesting primary market focus on the DACH region.

Friday layers AI capabilities on top of your existing email workflow through a Chrome extension. It offers natural language search, smart summaries, AI-generated replies, calendar scheduling, and bulk unsubscribe tools — all without leaving your inbox.

SuperDeck: AI-powered platform to generate startup ideas, pitch decks, videos, and MVPs. Accelerate your launch.

Automated U.S. visa solutions for startups, connecting businesses with independent immigration attorneys.

Ergo is an AI-powered revenue infrastructure platform that converts team conversations into automated CRM updates, follow-up emails, and pipeline reporting using plain-language field standards and real-time processing.

Contrario is an AI recruiting platform that embeds vertical AI agents alongside expert human recruiters in a hybrid workflow. The agents handle sourcing coordination, scheduling, follow-ups, and administrative sequencing, while human recruiters retain evaluation and decision-making authority. The platform offers bidirectional ATS integration, automatic job description enhancement, and candidate pipeline sync. Contrario launched after crossing a self-reported $6M in annualized revenue and positions against the crowded-field problem of fully automated recruiting tools that have flooded hiring teams with superficially qualified candidate profiles.

a0.dev is an AI-powered app building platform backed by Y Combinator. It offers database support via Convex or Supabase, built-in APIs for AI inference and image generation, and a documented real estate client portal use case. All product information is sourced from vendor materials without independent third-party validation.

Turn Python scripts into interactive web apps with Preswald. Deploy data analysis instantly, no JavaScript needed.

Extracts door schedules and hardware sets from architectural plans, maps openings to hardware specs, and overlays detections on floor plan visualizations.

Trata is an anonymous buyside research platform designed for hedge funds and institutional investors. The platform facilitates the exchange of professional investment analysis under an anonymity model, with backing from Y Combinator and editorial recognition from Bloomberg and Columbia Business School. All content is presented as author opinion without accuracy guarantees.

YC-backed AI test preparation tutor providing personalized, on-demand explanations for students. Positioned as an affordable alternative to private tutoring with flexible, schedule-free access.

HeroUI Chat: AI-powered tool to generate website UI components and code snippets.

Auctor is an AI platform designed specifically for software implementation work. It helps system integrators, services teams, and implementation consultants replace the patchwork of meetings, spreadsheets, and documents with an AI-native system of action that generates execution-ready artifacts—rough orders of magnitude, resource plans, process flows, and user stories—all kept aligned within a single connected workspace. Built on Pydantic AI and Temporal, Auctor provides a durable runtime where agents run as workflows that write themselves, turning weeks of manual implementation effort into minutes.

Cloudglue is a developer API that structures, searches, and reasons over video content, turning it into LLM-ready context for AI applications.

Open-source MCP infrastructure with hosted servers, Slack and Discord clients, Python and TypeScript SDKs, and white-label OAuth. Includes over 100 pre-built integrations and an early-access MCP testing platform.

Dedalus Labs provides a Unified API with OpenAI compatibility and native MCP support for AI agents, operating within a constrained sandbox with Clerk authentication and a Marketplace.

Hera is an AI-powered video creation platform with a template-driven workflow, community-shared remixable projects, and a developer API.

AI-powered billing automation for B2B teams. JustPaid reads signed contracts, extracts billing terms, generates invoices, and manages collections — integrating with your existing CRM, payments, and accounting tools.

Approval AI, branded as Ralo, is a mortgage rate comparison platform that automates lender matching. Users submit loan details — property type, location, down payment, credit score, and intended use — once, and the pricing engine compares available offers across its partner network without requiring phone calls. The platform follows a four-step Apply-Compare-Pick-Approved workflow.