diff --git a/Casks/i/intellij-idea-oss.rb b/Casks/i/intellij-idea-oss.rb
new file mode 100644
index 0000000000000..180d848e48dd7
--- /dev/null
+++ b/Casks/i/intellij-idea-oss.rb
@@ -0,0 +1,37 @@
+cask "intellij-idea-oss" do
+  arch arm: "-aarch64"
+
+  version "2026.1"
+  sha256 arm:   "248cc39ae85ea176e9b4a5fc0e0f8f67eea2db42ba3d67d75e1a23c3597067b3",
+         intel: "2f04e7bf2666b059d9e1886d9415622bec06c884d9dca9eb131265de936c7cb5"
+
+  url "https://github.com/JetBrains/intellij-community/releases/download/idea%2F#{version}/idea-#{version}#{arch}.dmg"
+  name "IntelliJ IDEA OSS"
+  desc "Open-source edition of IntelliJ IDEA"
+  homepage "https://github.com/JetBrains/intellij-community"
+
+  livecheck do
+    url :url
+    regex(/^idea[._-](\d+(?:\.\d+)+)(?:[._-].*)?\.dmg$/i)
+    strategy :github_releases do |json, regex|
+      json.flat_map do |release|
+        next if release["draft"] || release["prerelease"]
+
+        release["assets"]&.map do |asset|
+          match = asset["name"]&.match(regex)
+          match[1] if match
+        end
+      end
+    end
+  end
+
+  app "IntelliJ IDEA CE.app"
+
+  zap trash: [
+    "~/Library/Application Support/JetBrains/IdeaIC#{version.major_minor}",
+    "~/Library/Caches/JetBrains/IdeaIC#{version.major_minor}",
+    "~/Library/Logs/JetBrains/IdeaIC#{version.major_minor}",
+    "~/Library/Preferences/com.jetbrains.intellij.ce.plist",
+    "~/Library/Saved Application State/com.jetbrains.intellij.ce.savedState",
+  ]
+end