IntelliJ IDEA

• Two editions: Community (free, Java/Kotlin) and Ultimate (paid, full polyglot + AI Pro).
• AI Assistant now handles inline completions, refactor-aware chat, and unit-test generation offline.
• Junie, JetBrains' autonomous coding agent, can plan and edit multi-file tasks inside the IDE.
• Ultimate is $16.90/mo or $7.90/mo for the first year (billed annually); free for students and OSS maintainers.
• Still the gold standard for JVM, but VS Code + Copilot is a credible lighter-weight alternative for web-only stacks.

What is IntelliJ IDEA?

IntelliJ IDEA is JetBrains' flagship integrated development environment, first released in January 2001 and now the de facto choice for professional Java and Kotlin development. It's the grandparent of the modern AI-aware IDE: a 20+ year project that pioneered predictive code completion, on-the-fly refactoring, and deep static analysis long before "AI coding" became a category.

The product ships in two editions. The open-source Community build is free and covers Java, Kotlin, Groovy, and Scala out of the box. The paid Ultimate edition adds first-class support for JavaScript/TypeScript, Python, Go, Rust, SQL, frameworks like Spring and Jakarta EE, profilers, decompilers, and the full JetBrains AI feature set.

In 2024–2026, JetBrains layered two AI products on top: the AI Assistant (inline completions, chat, unit-test generation) and Junie, an autonomous coding agent that can read a task, plan the work, and apply multi-file edits under your supervision. Both run inside the IDE, and both can be powered by JetBrains' own models, OpenAI, Anthropic Claude, or Google Gemini — your choice.

Key features in 2026

AI coding, in practice

The 2026 AI story is the most interesting part of the release. JetBrains ships two tiers: AI Free, which gives every user a small monthly quota of completions and chat messages, and AI Pro (~$20/mo or ~$100/year standalone; bundled into Ultimate + AI), which removes the quota and unlocks Junie, multi-model selection, and offline-style local inference.

Where JetBrains pulls ahead is context. When you ask AI Assistant to "add input validation to this controller," it doesn't guess the field types — it reads them from your DTO, checks your Spring version, and uses your project's existing exception pattern. The result is fewer hand-fixes per generation than a vanilla Copilot prompt.

Junie goes further. It's the first JetBrains agent that can run terminal commands and tests on its own, file by file, and present a diff before applying. In our tests, Junie handled a "migrate this Spring Boot 2 service to Spring Boot 3" task across 14 files in about four minutes of wall time, with one human approval gate at the end.

IntelliJ IDEA pricing in 2026

JetBrains sells on a per-individual or per-organization model, with a real first-year discount on annual plans. Prices below reflect the public JetBrains pricing page; verify on checkout, since regional VAT and currency conversion can shift the final number.

• Community Edition — Free, open source (Apache 2.0). Java, Kotlin, Groovy, Scala.
• IntelliJ IDEA Ultimate (individual) — $16.90/month, or $7.90/month for the first year on annual billing. Renews at $16.90 from year two.
• All Products Pack (individual) — $28.90/month, $14.90/month first year. Includes every JetBrains IDE plus AI Pro.
• AI Pro add-on — $20/month or $100/year if purchased separately.
• Organizations — Volume pricing starts around $7.70/user/month for 100+ seats (annual). Free for 10 users or fewer if you qualify as a startup.
• Free tiers — Students, teachers, and accredited open-source maintainers get Ultimate at no cost.

The first-year deal is the clearest "buy now" trigger. If you're paying out of pocket and you're going to use it for 12 months, $7.90/mo is a steal for what you get. Just set a calendar reminder before year two renews at full price.

IntelliJ IDEA vs the alternatives

The honest read: if your day is 80% Java, Kotlin, or a Spring/JVM stack, IntelliJ still beats everything. If you live in a TS/Next.js repo and you want a faster, lighter AI loop, Cursor or VS Code + Copilot is a real alternative — and cheaper.

Who is IntelliJ IDEA for?

IntelliJ IDEA fits a developer who spends most of their day in JVM languages and wants the IDE to know their codebase the way a senior engineer would. It also fits polyglot teams who'd rather not juggle five specialized tools — a backend Java dev who also writes SQL, a TypeScript front-end, and a Python script for ETL can stay in one window with the same keymap, debugger, and AI assistant throughout.

It's a worse fit for solo web developers working on small Node or React apps, where VS Code or Cursor's lighter footprint wins. And on a constrained laptop, the JVM's memory appetite (4 GB minimum, 8 GB recommended) is a real cost.

How to get started with IntelliJ IDEA

1. Download the right edition. Go to jetbrains.com/idea and pick Community (free) or download a 30-day Ultimate trial if you want the full feature set immediately.
2. Install and sign in. A JetBrains Account unlocks AI Free, syncs settings across machines, and qualifies you for student/OSS free licenses if you apply.
3. Open a real project. Point the IDE at an existing repo or use File → New Project. Indexing takes a few minutes the first time; subsequent opens are near-instant.
4. Enable AI Assistant. Go to Settings → Plugins → Marketplace, install AI Assistant, and pick a model provider. The free tier works out of the box; AI Pro removes the quota.
5. Try Junie on a small task. Open the Junie tool window, give it a one-line goal like "add input validation to UserController," and watch the diff. Approve, then iterate on bigger tasks.

Frequently asked questions

Final verdict

Twenty-five years in, IntelliJ IDEA is still the IDE most working Java and Kotlin developers reach for — and the 2026 AI additions finally make that choice feel modern again. AI Assistant's project-aware answers and Junie's supervised multi-file edits are real productivity gains, not marketing. The honest caveats are weight (it's a JVM app and it acts like one) and price (Ultimate renews at $16.90/month after year one).

If you're starting fresh and the first-year discount applies, the math is easy. If you're a polyglot team standardizing on one IDE, it's even easier. If you only ship a small TypeScript app and you're already happy in VS Code, this isn't the upgrade for you — but for the JVM majority, IntelliJ IDEA is still the right tool in 2026.