Find the Right YC Founders. Reach Out Better.
Search 900+ YC startups, find the right founders, and send personalized cold DMs in minutes.
Manatee
DocSend for demos.
We let you see everything about how prospects interact with your demos, then convert them into paying customers.
Mandel AI
AI Coordination Layer for Supply Chain
Mandel runs the operational work across direct-materials sourcing and ordering - from RFQ through invoice - for manufacturers and distributors. It coordinates suppliers, checks orders and invoices against agreed terms, resolves discrepancies, recovers supplier credits, and keeps the ERP current. Working across email, supplier portals, EDI, and ERP systems, Mandel investigates issues and carries out the next steps within your team’s approval rules.
Mango Medical
Foundation models for planning orthopedic surgery
Mango Medical builds agentic surgical planning AI for orthopedic surgery. We deliver surgeon-ready plans in minutes instead of days. 8-figure LOI from a top orthopedic company. Pursuing FDA 510(k) clearance. We're building a future where every surgery follows a personalized plan.
MangoDesk
Long-horizon RL environments
We help AI become better at real-world workflows through production-grade RL environments.
Manicule
AgentRel — Devrel For Agents
Manicule does AgentRel. We get companies discovered and used by AI agents. Think DevRel, rebuilt for a world where agents make all the decisions. We own developer documentation and technical content across social channels, end-to-end. We've grown 100% MoM over the last three months to $53K in monthly revenue, with customers like Supermemory, Greptile, Reducto, and Mastra. Getting discovered and used by agents is its own job now, and the market for it is broken. The SEO/GEO SaaS tools just show you data like where you rank in AI answers. The agencies are slow and lack know-how with agents. The one person who could own all of it end-to-end, a DevRel, is nearly impossible to hire: our customers have had roles open for months at $300K+ and still can't find anyone good. We solve all these gaps. Naman has been doing fractional DevRel since he was 13, working with companies like PromptLayer, Brightdata, and Courier.com. Shreyans has been building since 14 — he built an AI app that hit App Store Productivity Trending within a month, and was the founding engineer at Supermemory. We met in high school and have built multiple startups together since.
Manifold
Drop-in robotic labor that works on Day 1
The US Warehouse industry spends $75bn on labor each year. Yet, only 10% of US warehouses have any form of automation, because existing robotics are too expensive and hard to integrate. Manifold deploys autonomous robots that handle picking, loading / unloading, and palletizing — priced by pick. Integration in hours. No upfront costs. No retrofitting. No need to rebuild the operation around the robot. Our mission is to make it easy for any warehouse to adopt robotics.
Mantis
Digital Twins of humans
Mantis is a digital twin company that combines LLMs with high-fidelity physics simulations in order to convert rare and difficult-to-access human behavior data into predictive models.
Mantle
The pit crew for machines and robots.
Mantle is a full-stack field service company that deploys, fixes and maintains machines for the companies that build them. We're not a marketplace or software tool, we own uptime directly to provide better, more reliable service without burdening your engineers on support calls. $500B+ a year is spent to keep machines running in the US, we're coming for all of it.
MantleBio
Transform scientific data into discoveries
Mantle brings modern data engineering to the lab to help scientists turn insights into world-changing breakthroughs.
Manufact
Cloud infrastructure for MCP servers and Claude / ChatGPT apps.
Manufact is the MCP cloud platform to get your product ready for Claude Connectors marketplace, ChatGPT App Store and any AI agent that supports MCP. We're the team behind mcp-use SDK, the open-source framework for building MCP Apps with 10k github stars and 8M+ downloads across python and typescript. It's the fastest and most complete solution for production-ready MCP servers.