ide
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JetBrains
JetBrains is a privately held software company that builds professional developer tools used by millions of programmers worldwide. Founded in 2000 in Prague, it is best known for the IntelliJ IDEA family of integrated development environments - including PyCharm, WebStorm, Rider, GoLand and CLion - and for creating the Kotlin programming language, now Google's preferred language for Android. The company also builds team tools such as TeamCity, YouTrack and the ReSharper extension for Visual Studio, and has moved aggressively into AI with its Junie coding agent and AI Assistant. JetBrains has never taken outside funding and remains self-funded and profitable.
Appeon
Appeon is a San Francisco software company that develops, sells, and supports PowerBuilder, the veteran rapid application development platform it took over from SAP in 2016. Through PowerBuilder, PowerServer, InfoMaker, and its CloudPro bundle, Appeon helps enterprises build data-driven business apps and modernize decades-old client/server systems into cloud-native and C#/.NET applications - protecting existing code investments rather than forcing full rewrites.
Bito
Bito is a San Francisco-based AI developer tools company building agents that review pull requests and ground code generation in deep codebase context. Its AI Code Review agent plugs into GitHub, GitLab, and Bitbucket to flag bugs, security issues, and style problems before humans burn a single brain cell on them - and it speeds up PR merges by 89%, according to the company.
Cursor
Cursor is an AI-first code editor built by Anysphere, a San Francisco startup founded in 2022 by four MIT graduates. Originally a fork of Visual Studio Code, Cursor has evolved into a full agent-based development platform where autonomous AI handles everything from autocomplete to end-to-end feature building. With $2B+ in annualised revenue, over half the Fortune 500 as customers, and a valuation that reached $29.3B after its Series D in November 2025, Cursor has become the fastest-growing SaaS company ever from $1M to $500M ARR - turning the IDE from a code-writing tool into an AI orchestration layer.