Websites run by YC
Hacker News
Articles and discussion for hackers
Y Combinator is a programming trick. I wanted to call it Y Combinator just because I thought the Y Combinator was a really cool thing. So it would be the perfect name for picking out the kind of people that we wanted. Hackers would look at this and think, “That’s so cool. They’re named after the Y Combinator. That’s because having that Y Combinator brand opens so many doors. It really is like having Harvard on a resume. When I cold email people, if I say we’re in Y Combinator, they open and respond. When we launched our podcast, Scale or Die, I could kind of reach a whole new level of guests because I said, “We’re in Y Combinator. Angry zombiesfree flash games.
Arc Language
The Arc Programming Language, which Hacker News is written in
Work at a Startup
Ycombinator's
Jobs for developers at YC companies
Startup Playbook.
Startup advice from YC distilled into one document
Blog posts and Essays
Ask a Female Engineer
A series of interviews with female engineers
Beating the Averages
A classic article on using powerful programming languages as a secret weapon
Better Bayesian Filtering
A proposal for a better bayesian filtering algorithm
How To Get Into Natural Language Processing
An introduction to NLP
Learning Math for Machine Learning
Mathematical background for learning Machine Learning
Ycombinator School
Data Packages for Fast, Reproducible Python Analysis
Advice on data packages from Quilt Data
Relevant YC Companies
Many YC companies are building developer tools. This is a list of them.
| Manycore.io | w2019 | ManyCore.io speeds up computer programs by spreading them automatically onto several cores |
| PreFlight | w2019 | Code-Free Automated UI Testing. |
| Alpha Vantage | s2018 | We provide accessible & affordable APIs for financial market data |
| OneGraph | s2018 | A GraphQL API wrapping and connecting all of the internet's APIs |
| Anima App | s2018 | We convert design to code |
| Federacy | s2018 | Security testing and bug bounty platform. |
| Numericcal | s2018 | Easily deploy, optimize and manage Deep Learning modules on IoT and mobile devices. |
| RevenueCat | s2018 | RevenueCat is a simple API for managing in-app subscriptions. |
| Airship | w2018 | |
| Draftbit | w2018 | Draftbit is a new way to build cross-platform, native iOS and Android apps in minutes. |
| EnvKey | w2018 | Password manager for API keys |
| CodeStream | w2018 | The knowledge base behind your codebase. |
| Haiku | w2018 | App builder that unifies design and code |
| Hexel | w2018 | Create a cryptocurrency for your community. |
| Jido Maps | w2018 | A lightweight API for persistent augmented reality. |
| NewCraft | w2018 | A marketplace for modern paid apprenticeships. |
| Repl.it | w2018 | In 2 seconds, boot up an online programming environment for your favorite language. |
| Sqreen | w2018 | Sqreen revolutionizes the way engineering teams protect their apps & customers against attacks. |
| AssemblyAI | s2017 | AssemblyAI builds customized speech-to-text models for customers working with voice data. Our customers use these models to transcribe phone calls, media, and other types of voice data with unparalleled accuracy and speed. |
| Escher Reality | s2017 | The backend for Augmented Reality. |
| Gopher | s2017 | Get things done without leaving your inbox. |
| Plasticity | s2017 | APIs that help developers create human-like natural language interfaces. |
| PullRequest | s2017 | Code review as a service - combining automation with a network of on-demand reviewers |
| Templarbit | s2017 | Protecting applications from malicious activity |
| Bitrise | w2017 | Hosted Continuous Integration and Delivery for mobile apps |
| Armory | w2017 | Continuous Deployment for the Enterprise |
| Retool | w2017 | Faster way of building internal tools for ops teams |
| FloydHub | w2017 | Floyd is Heroku for Machine Learning and Deep Learning. Run and deploy your project to the cloud with zero-setup. |
| XIX.ai | w2017 | Next generation Image Intelligence platform for Defence, Intelligence and enterprise sectors. |
| DevColor | s2016 | We give Black software engineers the support they need to enter and advance in the tech industry. |
| Expo | s2016 | Expo brings together the best of web (development speed, fast iteration cycles, easy deploys, and automatic cross-platform support) and the performance and user experience of native apps. Let's talk if you're planning to build a mobile app. |
| MessageBird | s2016 | MessageBird is an API for sending Text, Voice & Chat messages. We offer the most advanced messaging API, packed with features and customizable parameters for high-volume and demanding message senders. |
| NuCypher | s2016 | The privacy layer of the decentralized web. |
| OpenAI | s2016 | |
| Opsolutely | s2016 | Automated deployments for software teams. |
| RunKit | s2016 | |
| Scale | s2016 | Human-powered data for AI applications. |
| Wallarm | s2016 | Application and API security for the modern web |
| Women Who Code | s2016 | WWCode is a non profit with a set of programs that helps mid-career engineers get promoted. |
| Instabug | w2016 | In-app feedback and bug reporting for mobile apps. We're helping apps squash bugs in their beta apps and engage users in their production apps. If you're building a mobile app, we'd love to talk. |
| SendBird | w2016 | A flexible and scalable chat and messaging API for mobile apps and websites. |
| Mux | w2016 | API to video infrastructure and analytics. |
| Appcanary | s2015 | Appcanary tracks the dependencies you use in your apps and servers and notifies you whenever you're vulnerable to security vulnerabilities. |
| Foxpass | s2015 | Making enterprise security practices available for all companies. |
| Bitmovin | s2015 | Video Infrastructure for the Web |
| Convox | s2015 | Open-source tools for deploying, managing, and monitoring cloud infrastructure. |
| Font Awesome | s2015 | Font Awesome makes it easy to add vector icons and social logos to your website. And Pro gives 1,000+ more icons and SVG framework! |
| Gravitational | s2015 | Gravitational helps SaaS companies make more money by giving them a turn key 'on-premise' offering for their enterprise customers. |
| Heroic Labs | s2015 | Social infrastructure for games and apps. We've built Nakama server. An open-source distributed server for social and realtime games and apps. |
| SnapEDA | s2015 | The Internet's first parts library for circuit board design. Build circuit boards faster with millions of free symbols & footprints. |
| SourceDNA | s2015 | Bringing transparency to the app stores and helping developers build better apps. Acquired by Apple in 2016. |
| Zeplin | s2015 | Zeplin is a connected space for product teams where they can share designs, generate specs, assets and code snippets. |
| GitLab | w2015 | Git repository management, code reviews, issue tracking, issue boards, activity feeds, wikis and continuous integration. Community driven with more than 1000 contributors. |
| Moltin | w2015 | eCommerce building blocks through simple APIs for websites & apps. APIs include inventory, cart, checkout, payments and more. |
| Standard Cyborg | w2015 | The complete developer platform for interacting with 3D data |
| Pachyderm | w2015 | Pachyderm is “Git for Data Science.” We offer complete version control for data and give your data science team the same first-class development tools as software developers. |
| Paperspace | w2015 | Paperspace is a GPU accelerated cloud platform for individuals, startups, and the enterprise. |
| ReadMe | w2015 | ReadMe provides every company the ability to quickly and easily create beautiful documentation, and build loyal and productive developer communities. |
| Sails Co. | w2015 | Full-service web, mobile, & cloud studio providing professional support for the Sails framework and the open-source tools we build and maintain. |
| Yhat | w2015 | End-to-end data science lifecycle management platform. |
| Blockstack | s2014 | Blockstack is a decentralized computing platform. It’s the easiest way to build decentralized apps that can scale. |
| Flynn | s2014 | Flynn is an open source Platform as a Service (PaaS) |
| Algolia | w2014 | With 50 data centers in 15 regions, Algolia offers a developer-friendly and enterprise-grade search API. Designed to make every search interaction meaningful and rewarding, Algolia serves billions of queries weekly for more than 5,000 customers. |
| Kimono Labs | w2014 | Create APIs where they don't exist. With kimono you can quickly extract unstructured data from websites and turn it into clean APIs to use in your applications and services. |
| Povio | w2014 | We build software for the best* startups in the world. We do it faster and cheaper than if they would have built it by themselves. Our speciality is that we can start right away. Search Bookface for testimonials from our clients. *YC |
| Taplytics | w2014 | Make product decisions driven by your customers: Taplytics is an intelligent customer experience cloud specializing in turning first-time users into lifetime customers through magical moments. |
| TrueVault | w2014 | TrueVault is the first data security company entirely focused on protecting consumers' Personal Data for enterprises |
| Two Tap | w2014 | Two Tap connects retailers to companies that want to sell their products, in apps or sites, domestic or internationally Two Tap Crossborder is risk-free for retailers and it allows anyone outside of the US to order products from 1000s of US stores |
| Wit.ai | w2014 | Natural Language for Developers -- Wit is an API that makes it easy for developers to create apps that you can talk and text to. It turns speech or text into actionable data. |
| Apptimize | s2013 | Apptimize lets mobile teams innovate faster to create an amazing user experience. Our tech lets you instantly update your native Android and iOS apps for A/B testing, feature flagging, and changes without having to go through the App/ Play Stores. |
| CoreOS | s2013 | Enterprise Linux distribution that dramatically improves security and speed of application deployment. |
| EasyPost | s2013 | Shipping API |
| Estimote | s2013 | Indoor location API for developers |
| One Month | s2013 | One Month's affordable online bootcamps teach people how to code in just one month. Topics include Python, Ruby on Rails, JavaScript, and Front-end Development. For a full list of courses, visit https://onemonth.com/courses. |
| Bitnami | w2013 | The App Store for Server Software |
| Etleap | w2013 | ETL for Big Data |
| Fivetran | w2013 | Data infrastructure as a service |
| Heap | w2013 | Heap automatically captures every user interaction in your mobile or web app, letting you generate analytics without writing code or waiting for data. |
| InfluxData | w2013 | InfluxData is building the platform for collecting, storing, visualizing, and processing time series data at scale. |
| Easel | s2012 | Easel is a visual design tool built for the web. Since the web is viewed in a browser, we believe it should be built in one too. |
| Plivo | s2012 | APIs for Voice calls and SMS |
| Pixate | s2012 | Mobile application prototyping. Now part of Google. |
| Rainforest | s2012 | Dead simple testing. The fastest, easiest way to test your website. Say no to manual QA! |
| Zapier | s2012 | Zapier connects hundreds of SaaS apps with customizable workflows via an easy to use editor. |
| Authy | w2012 | Authy is a Two-Factor Authentication platform for developers |
| Flutter | w2012 | Flutter combined computer vision technology with the built-in webcams in laptops, iPads, smartphones and TVs to let users control these devices with gestures, facial expressions, hints and body-language. Flutter became part of Google in Oct 2013. |
| Marft | w2012 | Marft creates embeddable machine learning models for application developers. Users submit data by web/API, and receive optimized models implemented in a language of their choice. |
| Per Vices | w2012 | Per Vices Corporation builds software-defined radio (SDR) products. Our Crimson platform provides the flexibility and bandwidth required to support various radio applications used within the infrastructure, defence, and telecommunications industries. |
| Apollo | s2011 | We make Apollo, the leading GraphQL implementation. (We are also the team that built Meteor, the JavaScript framework.) |
| Codecademy | s2011 | Codecademy teaches the world the skills they need to get the jobs they want. |
| Segment | s2011 | Collect, clean, and control your customer data |
| Citus Data | s2011 | Real-time. Big data. PostgreSQL |
| Clutch | s2011 | An easy to integrate library for native iOS applications designed to help you develop faster and deploy instantly. |
| Compose | s2011 | We make it easy to run databases. PostgreSQL, Redis, MongoDB, Elasticsearch, and RethinkDB. |
| Firebase | s2011 | App success made simple. An app platform to develop high-quality apps, grow your user base, and earn more money. Acquired by Google. |
| HackerRank | s2011 | Programmer IQ |
| OneSignal | s2011 | OneSignal provides a simple interface to push notifications. OneSignal lets content creators focus on quality user engagement instead of complex implementation. Our goal is to democratize push communication for everyone. |
| Parse | s2011 | Parse is the easiest way to build apps. |
| Realm | s2011 | Better data structures = no DB. |
| Stypi | s2011 | Realtime collaborative coding |
| AppHarbor | w2011 | .NET Cloud Platform as a Service |
| Mailgun | w2011 | Email API service. |
| MemSQL | w2011 | ANSI SQL-compliant, distributed, in-memory database for real-time analytics |
| Tumult | w2011 | Tumult is building the next generation of apps for web design. Our first app is Hype, the HTML5 animation builder for OS X: http://tumult.com/hype/ |
| Upverter | w2011 | The future of hardware design. A marketplace for hardware engineering labour, component symbols, footprints, 3d models, access to manufacturing and enterprise grade ECAD for designing electronics, all rolled into one. |
| Docker | s2010 | App store for server configurations. |
| PagerDuty | s2010 | Notify you about server troubles. |
| Embedly | w2010 | |
| Optimizely | w2010 | A/B testing. |
| Zencoder | w2010 | Video Encoding API, Open source video player (video.js) |
| Stripe | s2009 | Payment processing |
| Directed Edge | s2009 | Product recommendations. |
| Cloudkick | w2009 | |
| Cloudant | s2008 | NoSQL Database-aaS. Acquired by IBM in 2014. Now IBM Cloud Data Services |
| 280 North | w2008 | |
| Heroku | w2008 | |
| Virtualmin | w2007 | |
| Clustrix | w2006 |