Y Combinator Technology Stack

Acquire is a live chat software which includes voice calling, one-way and two-way video chat, screen sharing, and co-browsing.

Adobe InDesign is a layout and page design software for print and digital media to create beautiful graphic designs with typography from the world՚s top foundries and imagery from Adobe Stock.

Adobe XD is an all-in-one UX/UI solution for designing websites, mobile apps and more. 

Amazon WorkSpaces is a managed desktop computing service in the cloud.

Asana is a task & project management solution for teams. Asana users can share, plan, organize & track the progress of the tasks that each member is working on.

Atlassian Confluence is a knowledge management software with flexible customization, organization and a powerful search engine, empowering collaboration and innovation.

AT&T Collaborate is a comprehensive cloud-based solution that provides feature-rich voice and collaboration tools that helps improve customer engagement, drive employee productivity, and streamline operations.

Fusion 360 offers 3D CAD, CAM, and CAE capabilities.

Adobe helps organisations in creation of multimedia and creativity software products, with a more recent foray into digital marketing software.

Adobe Creative Cloud is a set of applications and services used for graphic design, video editing, web development, photography, along with a set of mobile applications and also some optional cloud services.

Amazon CloudFront is a content delivery web service.

Amazon CloudWatch is a monitoring service for AWS cloud resources and the applications you run on AWS.

Amazon Elastic Compute Cloud (Amazon EC2) is a web service that provides resizable compute capacity in the cloud. It is designed to facilitate web-scale computing for developers.

Armory is an open-source deployment platform with deployment intelligence.

Bitbucket is a Git and Mercurial project hosting site enabling developers to share and collaborate on projects, with built-in CI/CD tool.

AWS AppSync is a fully managed service that makes it easy to develop GraphQL APIs by handling the heavy lifting of securely connecting to data sources like AWS DynamoDB, Lambda, and others.

Adobe Digital Marketing Suite is an integrated all-in-one marketing suite that allows companies of all sizes to personalize, optimize, and measure digital campaigns and customer experiences for optimal performance.

Adobe Enterprise is a business solution for creating multichannel campaign assets, designing prototypes for mobile user experiences, or creating large-scale video content with help of a suite of cloud based applications.

Amazon Athena is a serverless, interactive query service to query data and analyze big data in Amazon S3 using standard SQL.

Leading data-driven marketers rely on AppsFlyer for independent measurement solutions and innovative tools to grow their mobile business.

Argo helps teams ask questions about their data from cloud services to make smarter, data-driven decisions.

Autopilot is marketing automation and customer journey software that helps companies acquire, nurture, and grow leads into high-paying customers.

CIENCE is B2B Lead Generation Platform

Crunchbase is a platform for discovering industry trends, investments, and news about companies around the world.

Adobe Illustrator is a vector graphics editor.

Adobe InDesign is a desktop publishing software application.

Adobe Photoshop is a webtop application for editing images and photos online.

Altium is a PCB design software tool for the Microsoft Windows environment.

ANSYS is an engineering simulation and 3-D design software.

Ansys Mechanical is a best-in-class finite element solver with structural, thermal, acoustics, transient and nonlinear capabilities to improve structural modeling.

AutoCAD is computer-aided design (CAD) software that architects, engineers, and construction professionals rely on to create precise 2D and 3D drawings.

Autodesk creates design and modelling software and services for the architecture, engineering, construction, manufacturing, media, education, and entertainment industries.

ADP Payroll offers payroll processing solutions for businesses.

ADP RUN is a payroll administration and tax processing software solution.

Avalara is a leading provider of cloud-based software that delivers a broad array of compliance solutions related to sales tax and other transactional taxes such as VAT and Excise. They work within a customers own ERP, POS or ecommerce system to automate tax determination, exemption certificate management and tax return preparation, filing.

Blackbaud eTapestry allows organizations to function more effectively, better engage donors, and cut costs by consolidating information within a single database and providing one holistic view of relationships and performance.

BOARD International is an equal opportunity employer and is committed to a diverse and inclusive workforce.It provides a unified platform to effectively support decision making processes.

Brex is a financial services company which provides corporate credit cards and cash management in a single, strategic account

Celery helps innovative companies set up pre-order or custom crowdfunding campaigns anywhere.

Coupa is a powerful expense management software application that works across the organization.

Airbnb is an online marketplace for people to list, discover, and book accommodations through the internet.

Booking.com is one of the world's leading digital travel companies that provides accommodation, car rental, and flight ticketing services

Broadly is an online review & reputation management tool that helps small service-providing businesses improve their online reputation & attract new customers.

Eventbrite is an event management solution which helps businesses to plan, manage, & grow events through tools such as ticketing, attendee tracking, & marketing.

Expedia is an online travel company that helps travelers easily plan and book their whole trip with the widest selection of vacation packages, flights, hotels, vacation rentals, rental cars, cruises, activities, attractions, and services.

FiveStars is a customer loyalty app to create and manage rewards and loyalty schemes for company clients. The business edition of the app helps them to build a loyalty program that matches the needs of company business with flexible options such as VIP statuses and multiple tiers.

Freshdesk is a SaaS based, multichannel customer support software for businesses of all sizes, with gamification, automation, and is free for up to three agents.

G2 is a platform to share business software reviews in real-time.

Airbyte is an open-source data integration platform that syncs data from applications, APIs, and databases to data warehouses.

Amazon Elastic MapReduce is a web service that makes it easy to quickly process vast amounts of data.

Amazon Forecast is a fully managed, machine learning service by AWS, designed to help users produce highly accurate forecasts from time-series data.

Amazon Kinesis Data Streams (KDS) is a massively scalable and durable real-time data streaming service.

Amazon Machine Learning is a service that allows to develop predictive applications by using algorithms, mathematical models based on the user's data.

Amazon Redshift is a fast, fully managed, petabyte-scale data warehouse

Amazon SageMaker is a cloud machine-learning platform that enables developers to create, train, and deploy machine-learning models in the cloud and on embedded systems and edge-devices.

Amazon Transcribe uses a deep learning process called automatic speech recognition (ASR) to convert speech to text quickly and accurately.Amazon Transcribe can be used to transcribe customer service calls, to automate closed captioning and subtitling.

Airtable is a mobile friendly organization & collaboration platform designed to provide any sized team with the tools to create easy-to-use & flexible workflows.

Ambition is an AI-driven sales management platform that empowers sales leaders to build transparent, accountable, and inspired organizations

Amplemarket is an AI-powered sales assistant that takes care of all the sales tasks.

Base is a CRM software focused on empowering sales teams to win more deals. By automating tasks, data capture and analysis, the all-in-one platform aims to help sales reps increase productivity while enabling sales leaders to provide the personalized coaching needed to accelerate performance.

Carta helps customers track customers orders and inventory. Want to know what to ship, reorder, or customers profit margin? It's easy with Carta.

Catalyst is a gamified productivity tool for sales teams.

Clearbit develops a suite of business intelligence APIs for modern day firms.

Algolia is the search & discovery API for websites and mobile apps. they help the most innovative companies across e-commerce, media and SaaS industries create powerful, relevant and scalable discovery experiences for their users.

Amazon EventBridge is a serverless pub / sub service which makes it possible to seamlessly connect different event sources with AWS cloud services via event buses.

Amazon Kinesis makes it easy to collect, process, and analyze real-time, streaming data. Amazon Kinesis offers key capabilities to cost-effectively process streaming data at any scale, along with the flexibility to choose the tools that best suit the requirements of application. With Amazon Kinesis, businesses can ingest real-time data such as video, audio, application logs, website clickstreams, and IoT telemetry data for machine learning, analytics, and other applications.

Amazon Simple Queue Service (SQS) is a fully managed message queuing service that enables developers to decouple and scale microservices, distributed systems, and serverless applications.

Apache Druid is an open source, high performance real-time analytics database. It is designed to quickly ingest massive quantities of event data, and provide low-latency queries on top of the data.

Apache Hadoop HDFS (Hadoop Distributed File System) is a distributed file system that handles large data sets running on commodity hardware. It is used to scale a single Apache Hadoop cluster to hundreds and thousands of nodes.

Apache Ignite is an open source distributed database for high-performance computing with in-memory speed.

AppDynamics Application Intelligence Platform is an empowers todays software-defined businesses with the ability to proactively manage and optimize the most complex software environments in real time, and in production.

Amazon API Gateway is a fully managed service that makes it easy for developers to create, publish, maintain, monitor, and secure APIs at any scale.

Amazon Aurora is a MySQL and PostgreSQL-compatible relational database built for the cloud, that combines the performance and availability of traditional enterprise databases with the simplicity and cost-effectiveness of open source databases.

Amazon DynamoDB is a flexible NoSQL database service.

ElastiCache is a web service that makes it easy to deploy, operate, and scale an in-memory cache in the cloud.

Amazon Elasticsearch Service is a fully managed service that delivers Elasticsearch’s easy-to-use APIs and real-time analytics capabilities alongside the availability, scalability, and security that production workloads require.

Amazon Rekognition is a cloud-based Software as a service computer vision platform that provides fast and accurate face search, allowing developers to identify a person in a photo or video using a private repository of face images.

Amazon Relational Database Service (RDS) is a distributed relational database service by Amazon Web Services. It is a web service running in the cloud designed to simplify the setup, operation, and scaling of a relational database for use in applications.

Amazon SNS enables businesses to send messages or notifications directly to users with SMS text messages to over 200 countries, mobile push on Apple, Android, and other platforms or email (SMTP).

Amazon Batch is a fully managed batch processing service offered by AWS. It enables developers, engineers, and scientists to easily and efficiently run hundereds of thousands of batch computing jobs on AWS.

Amazon EC2 Container Service is a highly scalable, high-performance​ container management service that supports Docker containers.

Amazon Elastic Block Store (Amazon EBS) is an easy to use, high-performance, block-storage service designed for use with Amazon Elastic Compute Cloud (EC2) for both throughput and transaction intensive workloads at any scale.

Amazon Elastic Container Service (Amazon ECS) is a fully managed container orchestration service that provides the most secure, reliable and scalable way to run containerized applications.

Amazon Elastic Kubernetes Service (Amazon EKS) gives the flexibility to start, run, and scale Kubernetes applications in the AWS cloud or on-premises.

Cloud based storage systems by AWS.

Amazon Virtual Private Cloud lets you provision a logically isolated section of the AWS cloud.

Amazon Web Services (AWS) is a comprehensive, evolving cloud computing platform provided by Amazon that includes a mixture of infrastructure as a service (IaaS), platform as a service (PaaS) and packaged software as a service (SaaS) offerings.

Amazon Cognito is a service that makes it easy to save mobile user data, such as app preferences or game state, in the AWS Cloud.

Auth0 is a set of unified APIs and tools that instantly enables single sign-on and user management for all your applications.

AWS IoT offers services for all layers of security, including preventive security mechanisms, like encryption and access control to device data, and a service to continuously monitor and audit configurations.

AWS Single Sign-On (AWS SSO) is a cloud service that allows you to grant users access to AWS resources, such as Amazon EC2 instances, across multiple AWS accounts.

Cloudflare mitigates threats from website scraping to application level attacks e.g. SQL Injection and DDOS Protection without any additional hardware.

Datadog is a monitoring service for IT, dev & ops teams who write and run applications at scale, and want to turn the massive amounts of data produced by their apps, tools and services into a unified view of IT infrastructure. Datadog's capabilities are provided on a SaaS-based data analytics platform that enables multiple teams to work collaborative.

Front is the collaborative communication platform that brings their shared emails into a single place to enable teams to work together and respond faster.

Google Cloud Virtual Private Cloud (VPC) provides networking functionality to Compute Engine virtual machine (VM) instances, Google Kubernetes Engine (GKE) containers, and the App Engine flexible environment. VPC provides networking for cloud-based services that is global, scalable, and flexible.

Apache Airflow is an open source workflow management platform that enables to programmatically author, schedule, and monitor workflows.

Apache Oozie is a server-based workflow scheduling system used to schedule Apache Hadoop jobs. Oozie combines multiple jobs sequentially into one logical unit of work. It is integrated with the Hadoop stack, with YARN as its architectural center, and supports Hadoop jobs for Apache MapReduce, Apache Pig, Apache Hive, and Apache Sqoop.

Beyond is a revenue management platform which helps to rent vacation properties with dynamic, demand driven pricing tool.

DocuSign is a secure, web-based Digital Transaction Management (DTM) platform and eSignature solution. 

Duolingo is a language learning application that also provides digital language proficiency assessment tests.

Easy PDF is a free online PDF conversion tool that can convert files from and to PDF.

Google Sheets is a spreadsheet program for data analysis.

Instrumentl is a grants management platform for nonprofits and grant writers looking to grow revenue. Through a personalized process, grant seekers can discover, research and track their grants all in one place.

AT&T is a US-based telecoms company, and the second largest provider of mobile services and the largest provider of fixed telephone services in the US.

AT&T Connect streamlines real-time conferencing with web, audio, and video in a single, easy-to-use tool.

ClassDojo is a school communication platform that teachers, students, and families use to build close-knit communities.

Cloud Phone is a cloud-based virtual phone system that can answer, route and manage calls. Features include an auto-attendant, call recording, call screening, conference calling, online faxing and voicemail transcription.

Your own, personal URL for video calls.

Gather Town is Virtual office workspace video chat in 2D customizable spaces.

AWS Route53 is a Cloud DNS service helps in customers to route end user requests to internet applications.

DigitalOcean DNS is a Domain Name System (DNS) solution for companies looking for secure and managed domains and web-hosting solutions.

HAProxy is the commercial version of its popular load balancer and application delivery controller, is now available on AWS Marketplace.

Sonic is an internet & phone service provider.

Verizon DNS is a Domain Name System (DNS) solution by Verizon. It provides customers with secure web and cloud hosting solutions.

Benchling is a cloud-based software platform for biology researchers and research and development organizations.

Headspace is a digital mental health platform specializing in meditation.

WELL is patient communication platform for healthcare that allows providers to communicate throughout the lifecycle of patients.

Bitbucket Pipelines brings continuous integration and delivery to Bitbucket cloud, empowering teams to build, test, and deploy their code.

Bugzilla is a robust, featureful and mature defect-tracking system, or bug-tracking system. Defect-tracking systems allow teams of developers to keep track of outstanding bugs, problems, issues, enhancement and other change requests in their products effectively. Simple defect-tracking capabilities are often built into integrated source code management environments such as Github or other web-based or locally-installed equivalents. We find organizations turning to Bugzilla when they outgrow the capabilities of those systems - for example, because they want workflow management, or bug visibility control (security), or custom fields.

Our continuous integration and delivery tools are simple yet powerful, allowing teams of all sizes to build better software, faster.

Cypress.io is an end-to-end Javascript​ testing framework.

JUnit is a unit testing framework for the Java programming language. JUnit has been important in the development of test-driven development, and is one of a family of unit testing frameworks which is collectively known as xUnit that originated with SUnit.

Optimizely is the world's leading experimentation platform, enabling businesses to deliver continuous experimentation and personalization.

Selenium is a portable software-testing framework for web applications. Selenium provides a playback tool for authoring tests without the need to learn a test scripting language.

SoapUI is an Open Source functional testing tool for API testing.

EasyPost is a simple shipping API that integrates USPS, UPS, FedEx, DHL.

Guesswork is a product recommendation engine for e-commerce sites.

Houzz is a platform for home remodeling and design, providing homeowners everything theyy need to improve their homes.

Meesho provides a complete set of mobile tools for small businesses to manage ecommerce on Facebook and WhatsApp.

MyCommerce provides small-to-medium sized businesses with proven and affordable global cloud commerce solutions.

Shopify is a commerce platform to help you build a secure and customizable ecommerce website for your brand.

GitPrime analyzes data from Git-based code repositories to measure team productivity, understand individual work patterns, and identify areas for improvement.

Zilingo is a technology platform that powers the global supply chain with innovative trade solutions.

Oracle Project Management is an Oracle technology that helps to improve project delivery and increase profits as a single, intelligent solution that manages projects across the enterprise and connects them with finance, HR, and operations.