--- title: JetBrains kills Kotlin Notebook months after Microsoft’s... description: JetBrains is sunsetting Kotlin Notebook, its interactive coding plugin launched in 2023, citing low adoption and AI-driven workflow changes. The plugin will be... canonical: https://daily.dev/posts/jetbrains-kills-kotlin-notebook-months-after-microsoft-s-polyglot-exit-but-jupyter-is-doing-just-fi-f6t9up7tt twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: JetBrains kills Kotlin Notebook months after Microsoft’s Polyglot exit. But Jupyter is doing just fine. | daily.dev og:description: JetBrains is sunsetting Kotlin Notebook, its interactive coding plugin launched in 2023, citing low adoption and AI-driven workflow changes. The plugin will be... og:url: https://daily.dev/posts/jetbrains-kills-kotlin-notebook-months-after-microsoft-s-polyglot-exit-but-jupyter-is-doing-just-fi-f6t9up7tt og:image: https://api.daily.dev/og/posts/f6t9UP7tT.png og:image:alt: JetBrains kills Kotlin Notebook months after Microsoft’s Polyglot exit. But Jupyter is doing just fine. og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # JetBrains kills Kotlin Notebook months after Microsoft’s Polyglot exit. But Jupyter is doing just fine. **[The New Stack](https://daily.dev/sources/newstack)** · 4 min read · 0 upvotes · 0 comments ## Summary JetBrains is sunsetting Kotlin Notebook, its interactive coding plugin launched in 2023, citing low adoption and AI-driven workflow changes. The plugin will be unbundled from IntelliJ IDEA 2026.2 and open-sourced under Apache 2.0, but no compatible version will be published for 2026.3 onward. This follows Microsoft's February deprecation of Polyglot Notebooks for C# and .NET. The real underlying reason, the piece argues, is that notebook culture is deeply Python-native — rooted in data science workflows — and neither Kotlin nor C# developer communities adopted it the way Python developers use Jupyter. Meanwhile, Jupyter itself is thriving: GitHub Octoverse data shows a 75% year-over-year growth in repositories containing Jupyter Notebooks, and usage nearly doubled in AI-tagged repos. Google Colab, built Python-first from the start, has leaned into AI features rather than retreating. JetBrains, for its part, is pivoting toward AI-native tooling, having open-sourced its Mellum2 coding model the same month it killed Kotlin Notebook. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Questions this post answers ### Is JetBrains discontinuing Kotlin Notebook? Yes, JetBrains announced it is sunsetting Kotlin Notebook, the interactive coding plugin launched in July 2023. Starting with IntelliJ IDEA 2026.2, the plugin will be unbundled from the IDE and open-sourced under Apache 2.0 license. JetBrains will not publish a compatible version for IntelliJ IDEA 2026.3 or beyond, so anyone continuing to use it depends on community maintenance. _daily.dev helps JVM developers track plugin deprecations like Kotlin Notebook before their IDE upgrade breaks things._ ### Why did Microsoft deprecate Polyglot Notebooks? Microsoft deprecated Polyglot Notebooks, its VS Code extension for running C# and other languages in the Jupyter format, in February with barely a month's notice despite the extension having drawn more than 1.8 million installs and a four-star rating. Microsoft pointed users toward newer AI-powered coding experiences as the replacement path rather than continuing the notebook format. _developers relying on deprecated VS Code extensions can follow migration signals like this through daily.dev._ ### Is Jupyter Notebook usage declining because of AI coding tools? No, Jupyter Notebook usage is growing, not declining. GitHub's Octoverse report found the number of repositories containing Jupyter Notebooks grew 75% year-over-year, from 1.4 million to 2.42 million, and usage nearly doubled within AI-tagged repositories, with over 400,000 such projects active as the go-to environment for AI experimentation. _daily.dev keeps developers current on how tools like Jupyter are actually faring amid AI-driven workflow shifts._ ## Similar posts on daily.dev - [Kotlin Notebook Sunset](https://daily.dev/posts/kotlin-notebook-sunset-pnspsbeut) · JetBrains · 2 upvotes · 1 comments - [Users slam Microsoft over Polyglot Notebooks deprecation](https://daily.dev/posts/users-slam-microsoft-over-polyglot-notebooks-deprecation-uo1cat0nm) · The Register · 0 upvotes · 0 comments - [Microsoft's sudden deprecation of Polyglot Notebooks leaves users fuming](https://daily.dev/posts/microsoft-s-sudden-deprecation-of-polyglot-notebooks-leaves-users-fuming-ej73vqkhb) · DEVCLASS · 0 upvotes · 0 comments --- Tags: [#python](https://daily.dev/tags/python), [#kotlin](https://daily.dev/tags/kotlin), [#jetbrains](https://daily.dev/tags/jetbrains), [#jupyter](https://daily.dev/tags/jupyter) [View this post on daily.dev](https://daily.dev/posts/jetbrains-kills-kotlin-notebook-months-after-microsoft-s-polyglot-exit-but-jupyter-is-doing-just-fi-f6t9up7tt) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"JetBrains kills Kotlin Notebook months after Microsoft’s Polyglot exit. 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