ClimaCell is a Boston-based weather intelligence platform for automated weather predictions.

Sisense is a software company offering a platform for data analysts and data engineers to transform data into actionable business insights.

Hasura is a software and development tools company, offering tools for developers to simplify application development.

Zapier is an American for-profit corporation and a web-based service that allows end users to integrate the web applications they use.

42Crunch is an enterprise API security platform with integrated services, including an API firewall, to discover and remediate API security vulnerabilities.

Auth0 is an authentication and authorization service for application developers.

Postman is a San Francisco-based software company offering an API development environment.

Unifonic is a Saudi-based cloud communication startup.

Plivo is a cloud-based communications platform as a service (CPaaS) company headquartered in San Francisco, California. The company allows software developers to integrate phone calls, text messages, and other communication functions into their applications using its web service APIs.

Contentful's platform helps teams deliver digital experiences faster with an API-first approach.

Fortress Identity is a Miami-based cybersecurity developer offering multi-factor authentication with biometrics inherence factors to secure iOS and Android applications, active directory environments and Citrix applications.

PolyAI is a company building an enterprise conversational platform with AI-generated voice assistants to improve customer experience.

Strapi is a company offering an open-source headless content management system (CMS).

Algolia is a company designing and building search and discovery API for websites and mobile apps. It participated in the W14 cohort of Y Combinator.

A technology company, now part of Salesforce, providing an integration platform for connecting SaaS & enterprise applications.

Replit is a San Francisco-based IDE and software development environment company making a browser application platform for coding in over fifty programming languages.

EVEN Financial offers a B2B2C API to help connect financial institutions to consumers, and connect consumers to personalized financial products.

SendBird is a developer of a messaging API for mobile applications and websites.

Salt Security is a Palo Alto, California-based protection platform for APIs and associated API integrations.

Stardust is a company that develops solutions for gaming in the metaverse.

Directly is a San Francisco-based developer of artificial intelligence systems of customer experience and chatbots founded by Antony Brydon, Jean Tessier and Jeff Patterson.

Crunchbase is company that offers an online platform for discovering information related to private and public businesses.

MachineMetrics is a developer of industrial IoT analytics and a machine monitoring platform.

Flatiron Health is a startup that organizes real-time oncology data to help cancer patients and doctors.

Onfido is an identity verification service for enterprises.

Symbl is an API platform for businesses looking to deploy conversational intelligence.

Rapid API is a software company specializing in developing a platform for application programming interfaces.

Segment is a company providing a data infrastructure for businesses.

Railsr, formerly Railsbank, is a London-based open-API banking and compliance platform that gives regulated and un-regulated companies access to global bankings.

MonkeyLearn is an artificial intelligence data analysis and visualization platform.

Facial recognition company Kairos today announced the alpha release of the Kairos Protocol, a biometric verification system for cryptocurrency transactions.

Corsha provides API security software that aims to prevent network attacks through multi-factor authentication for APIs.

Sano is a technology company making a biometric sensor that provides users with information about how their body metabolizes glucose. Sano Intelligence was acquired by One Drop in April 2020.

Noname Security is a Palo Alto, California-based cybersecurity and network security company developing products to protect APIs.

A company offering a communications platform allows developers to quickly build features that connect to every email, calendar, and contacts provider in the world.

An app that aggregates social media data to produce a real-time map of sickness.

Uphold (formerly Bitreserve) is a cloud-based digital money platform. Users can buy, hold, convert and transact across currencies and commodities, including cryptocurrencies.

AssemblyAI is a speech AI company developing AI models capable of transcribing and understanding human speech.

Spire is a company developing tags that provide health tracking including respiration, sleep, stress, activity, and pulse rate.

Gupshup is an AI-powered messaging platform that integrates with communication software and protocols for commerce, marketing, and support applications.

Kong (formerly Mashape) is a San Francisco-based company that offers open source microservice API gateway.

DrChrono is a company providing EHR, Practice Management, and Revenue Cycle Management Solution APIs. It participated in the W11 cohort of Y Combinator.

Practice Fusion is a San Francisco-based developer of electronic health record and medical practice management software.

Sinch offers programmable SMS, voice, video, and verification tools.

Cardiogram is a company building a personal healthcare assistant, using Deep Learning to turn consumer wearables into continuous health monitors. Cariogram can now detect 4 medical conditions Sleep Apnea, High Blood Pressure, Atrial Fibrillation, and Diabetes.

Stoplight is an Austin, Texas based company developing an API design and documentation platform.

A patient connection and relationship management company, using artificial intelligence-enabled technology to drive more meaningful patient-doctor engagements while improving care utilization and pathways.

A company building an identity resolution & insights platform

A software platform for data visualization and embedding reports & dashboards.

Keen is a company founded in 2011 by Kyle Wild, Ryan Spraetz and Dan Kador.

AppDirect is a company providing an end-to-end cloud commerce platform for businesses.

Sanity is a software company offering a customizable headless content management system (HCMS).

U.S-based company providing cloud infrastructure for global software and hardware development and deployment.

Moesif is a Caifornia-based company providing API analytics and tools.

Firebase is a mobile and web application development platform. It was founded in 2011 and acquired by Google in 2014. It is located in San Francisco, California.

SmartBear Software is a company developing tools for various software development and API management tasks.

TruePill is a US-based company providing pharmacy product deliveries.

Bloom API is a healthcare company focused on communication practices.

Lithic is a financial technology company that builds payments infrastructure for businesses and consumers.

Traceable is an API security software developed to protect application infrastructures.

An insurance technology company offering a platform for healthcare organizations to access health insurance data to improve their ability to bring new products and services to market.

Mailjet is an email services provider.

Speechly is a Helsinki-based developer of a voice interface API for web and mobile applications.

NewsWhip is a predictive media monitoring tool founded in 2011 by Paul Quigley.

FalconX is a blockchain, cryptocurrency, and fintech-focused brokerage and digital asset trading platform.

Coterie is an API-based commercial business insurance provider that updates policy changes in real-time.

Pliant is a company offering a workflow orchestration and infrastructure automation platform.

BetterDoctor, a technology company, delivers provider directory data and has a database that can be accessed through a responsive API.

Lob is a company developing and building APIs for automating mail and customer communications with print media. It participated in the S13 cohort of Y Combinator.