These are the programming languages that are used by America's most valuable startups, from Airbnb to WeWork

What it does: A shopping app that sells items directly from the manufacturer.

Valuation: $8 billion

Total raised: $1.5 billion

Programming languages used: PHP, Python, Golang, Ruby, Java, C, C++, Go, Perl

Frameworks used: ReactJS, Hadoop

Databases used: MySQL, MongoDB, Redis

What it does: An app that allows people to buy and sell cryptocurrency.

Valuation: $8.05 billion

Total raised: $525.31 million

Programming languages used: Go, Ruby, JavaScript, Swift, Objective-C, Kotlin, Java, C, C++, Rust

Frameworks used: ReactJS, NodeJS

Databases used: PostgreSQL

What it does: Develops therapeutic drugs for degenerative diseases.

Valuation: $12.44 billion

Total raised: $763.9 million

Programming languages used: C#, JavaScript

Frameworks used: AngularJS, Entity

Databases used: SQL

What it does: Develops video games like Fortnite and Unreal Engine games.

Valuation: $15 billion

Total raised: $1.58 billion

Programming languages used: Go, Java, Python, Perl, Shell

Frameworks used: n/a

Databases used: MongoDB, MySQL, PostgreSQL

What it does: Develops data analysis software for large companies, nonprofits, and government agencies.

Valuation: $20.53 billion

Total raised: $2.75 billion

Programming languages used: Python, JavaScript, Ruby, Go, Java, C++

Frameworks used: Flask, Django

Databases used: MySQL

What it does: Develops an online payment platform that helps businesses accept electronic payments.

Valuation: $22.5 billion

Total raised: $1.03 billion

Programming languages used: Python, JavaScript, Ruby

Frameworks used: n/a

Databases used: PostgreSQL

What it does: Designs and manufactures rockets to travel to outer space and eventually to Mars.

Valuation: $33.4 billion

Total raised: $3.57 billion

Programming languages used: Python, JavaScript, Java, C++, C, PHP, Ruby

Frameworks used: n/a

Databases used: MySQL, PostgreSQL

What it does: Allows people to rent out and book property for short-term stays.

Valuation: $31 billion

Total raised: $4.4 billion

Programming languages used: Java, Ruby, Python, JavaScript, PHP

Frameworks used: ReactJS, Flask, Hadoop

Databases used: MySQL, Redis, RDS

What it does: Develops nicotine vaporizers as an alternative to traditional tobacco products.

Valuation: $38 billion

Total raised: $14.15 billion

Programming languages used: Java, C, C++, Python, Go

Frameworks used: n/a

Databases used: n/a

What it does: Provides shared workspaces and office services for entrepreneurs, freelancers, startups and small businesses.

Valuation: $47 billion

Total raised: $8.39 billion

Programming languages used: JavaScript, Ruby, Python

Frameworks used: NodeJS, ReactJS, Foundation, Flask

Databases used: n/a