Singularity vs JetBrains (Junie, Air): agents in the IDE or an ADE?

JetBrains IDEs (IntelliJ IDEA, PyCharm, WebStorm, GoLand, Rider and the rest) are the daily tool of many Java, Kotlin, Python and .NET teams that rely on their code analysis, refactorings and debugger. In 2026 JetBrains added a full agentic layer: AI Assistant, the Junie coding agent, now out of beta, and Air, presented as a system for building software with agents.

So the real decision is not “IDE versus AI”. It is about where you organise delegated work: inside the JetBrains ecosystem, around the IDE and JetBrains AI credits, or in Singularity, where every task becomes a ticket on a Kanban board, executed by the agent of your choice in an isolated Git worktree, then reviewed before integration.

Comparison checked on 10 October 2026 against the official documentation of JetBrains (IDEs, AI Assistant, Junie and Air) and of Singularity. It compares workflows; it does not benchmark speed or the quality of generated code. Public prices are quoted in USD/EUR as displayed, excluding tax and usage, and may change. Several parts of Air are in preview or early access.

In short

• JetBrains builds AI into mature IDEs (chat, completion, agents), offers Junie in the IDE, the terminal and CI, and Air to run agent tasks in parallel, locally, in a worktree, in Docker or in the cloud.
• Singularity is a desktop ADE: editor, terminal, Git, LSP and a Kanban that acts as the execution surface, with dependencies, child tickets and an integration queue.
• Both let you pick the agent; JetBrains bills cloud AI in credits, Singularity is free and sells no model.
• For code analysis and debugging, a JetBrains IDE is more complete, and it sits comfortably next to Singularity.

JetBrains and its agent offering

JetBrains publishes desktop IDEs for Windows, macOS and Linux, installable through the Toolbox App (IntelliJ IDEA installation guide). Since version 2025.3, IntelliJ IDEA is a single unified product: its core stays free and an Ultimate subscription, with a 30-day trial, unlocks advanced tooling (IntelliJ IDEA documentation).

AI Assistant groups the AI features and coding agents built into the IDEs: context-aware chat, multi-step agents, inline completion and next-edit suggestions, and generation of tests, documentation and commit messages. It works with a JetBrains AI subscription or your own API keys (AI Assistant documentation).

Junie, JetBrains’ coding agent, left beta in June 2026. The same agent powers the AI chat, the Junie tool window and Junie CLI; it can review code from GitHub Actions or GitLab and works with any model, using your Anthropic, OpenAI or Google keys or local runtimes through LiteLLM, LM Studio and Ollama (general availability announcement). Its website lists a CLI for macOS, Linux and Windows and a free model, Junie Lite (Junie website). In the IDE, Junie offers a Code mode that plans then executes, a read-only Ask mode, approvals for sensitive commands and file-by-file review (Junie in the IDE).

Air launched in preview in March 2026 to delegate tasks to several agents in parallel: Codex, Claude Agent, Gemini CLI, Junie and ACP agents (preview announcement), joined in July by GitHub Copilot, OpenCode, Pi, Cline and local models (July update). JetBrains now presents it as a system available in the IDEs, on the web, as a CLI and soon on mobile, with per-project cloud environments (Air page). The Air app installs on macOS, Linux and Windows and connects to JetBrains AI, an Anthropic, OpenAI or Google account, or an ACP agent (Air quick start). Each task runs locally with no isolation, in a Git worktree, in Docker or in the cloud (run environments), and the Tasks view groups them by date, status or target (multitasking). Air is also arriving in the IDEs as early access, with AI Assistant still available (Air in IDEs), and Air Teams, currently for business customers, adds cloud automations triggered by GitHub, Jira, webhooks or schedules (Air Teams announcement).

Singularity at a glance

Singularity, built by Meteor Factory, is a desktop agentic development environment: an editor with language servers (editor, LSP), real terminals (terminal), a Git client with graph, diffs, stash and worktrees, multi-project workspaces and Mission Control, a Kanban board that runs agents (Kanban).

A ticket carries description, priority, attachments, dependencies and agent configuration, then keeps the thread, the report and a short resolution (tickets). Every run works in an isolated worktree; its commits are replayed onto the base branch with a rebase, with a per-project integration queue (worktrees, orchestration). Singularity drives the CLIs of Claude Code, Codex, Copilot, Cursor, Gemini, Mistral and Ollama with your accounts (AI providers). The app is free on macOS, Windows and Linux (installation); the Singularity Licence, at 24 EUR per month per workstation, only unlocks paid plugins such as Pipelines (pricing).

Comparison table

The same feature in both tools

Take a common request: a CSV export of invoices, with an API endpoint, a UI button and tests.

With JetBrains. In IntelliJ IDEA you hand the task to Junie in Code mode. It plans, edits several files, runs commands once approved and shows a diff you can revert file by file. To parallelise, you create one Air task for the API and one for the UI, each in a worktree or Docker. Air can have a second agent review the result; you then apply it locally or check out the branch to open a pull request (Air quick start). The IDE debugger is right there.

With Singularity. You create two tickets, “Export endpoint” and “Export button”, the second “blocked by” the first, each with context, acceptance criteria and out-of-scope items. The scheduler starts the API ticket in its worktree; the UI ticket starts once the first is integrated, from an up-to-date base. A blocking question puts the ticket on hold until you answer. The Review tab then lets you annotate, approve file by file, merge all or part, or rerun the agent with feedback (review).

JetBrains starts from the IDE and the task; Singularity starts from the ticket and its relationships with other tickets.

Agents and parallelism: Air tasks or Kanban tickets

Air lets you choose the isolation level, from a local folder to a container or a cloud environment, which helps with untrusted code or long-running work. Per the documentation, Claude Agent cannot run in a container on a Claude subscription and falls back to API billing or JetBrains AI credits (run environments).

Singularity sticks to a worktree per run and invests in planning: priorities, dependencies, child tickets, recurring runs, concurrent-agent and retry limits (Kanban). Each session gets a temporary MCP gateway to read its ticket, publish its phase or ask a question (orchestration). Air offers a task list with statuses, without a documented Kanban; for teams, Air Teams provides cloud automations, which Singularity does not offer as a hosted service.

Review and Git integration

In Air, an isolated task comes back through “Apply Locally”, which copies the changes into your working copy as uncommitted changes, or through the task branch, pushed as a pull request; in cloud mode Air pushes a dedicated branch itself (run environments). Final integration goes through your usual Git flow and the IDE’s Git tooling.

Singularity integrates inside the app: a rebase onto the latest base for linear history, a per-project integration queue, and automatic or review-gated merging depending on your settings (worktrees). Neither removes semantic conflicts: rerun tests after integration and keep human review on sensitive code.

Models, credits and cost structure

The Junie site shows Junie Lite for free, AI Pro from 8.33 USD per user per month with 10 credits per 30 days, and AI Ultimate from 25 USD with 35 credits, depending on annual or monthly billing; bring-your-own-key is advertised at provider rates with zero markup (Junie website). Credits are consumed by features relying on cloud models, top-ups are available, and AI Pro is included with the All Products Pack (JetBrains AI plans). The IDE licence is separate.

Singularity bundles no model: you pay the providers of the CLIs you use directly, or nothing more with a local model through Ollama. The app is free, with unlimited agents, projects and worktrees (pricing). On data, Singularity keeps everything in a local SQLite database and does not send your code to an intermediary service: only the configured CLIs talk to external services (AI providers).

Where JetBrains is stronger

• Code understanding. Inspections, refactorings and a debugger far richer than Singularity’s editor, which has no multiple cursors or split editor (documented limitations).
• AI while editing. Inline completion and next-edit suggestions; Singularity’s completion comes from language servers.
• Choice of isolation. Local, worktree, Docker or cloud in Air.
• Teams and cloud. Air Teams, shared environments, automations and Junie in CI.

Where Singularity stands out

• The ticket as the unit of work. Dependencies, child tickets, report and short resolution on a Kanban that shows every agent’s state.
• Controlled integration. Rebase, integration queue, per-file approval and partial merge.
• No intermediate credits. Seven providers through your own accounts, including Cursor and Mistral.
• Predictable cost. The app is free; only the plugin licence is paid.

Can you use both?

Yes, and it is often the sensible choice. A Singularity worktree is an ordinary Git folder: open it in IntelliJ IDEA or PyCharm to debug before approving the review. Codex, Copilot, Gemini and Claude, available in Air, can also be driven by Singularity; Junie, however, is not one of its providers. Just avoid two orchestrators integrating into the same branch at once. See also Singularity vs Claude Code and, for another editor invested in ACP, Singularity vs Zed.

Which tool should you choose?

• Java, Kotlin or .NET team attached to its IDE: JetBrains, with Junie and Air.
• Organisation that wants cloud agents and team automations: Air Teams, subject to eligibility.
• Developer or small team delegating many linked tasks: Singularity, for the Kanban, dependencies and review.
• Team already paying for Claude, Codex, Copilot or Cursor: Singularity reuses those accounts.
• Mixed profile: Singularity to orchestrate, a JetBrains IDE to debug and refactor.

Trial protocol

1. Pick a real task that touches the API and the UI and has existing tests.
2. Write one description (context, acceptance criteria, out of scope) for both tools.
3. In JetBrains, run Junie, then two Air tasks in worktrees; in Singularity, two tickets linked by a dependency.
4. Use the same model on both sides and note credit or subscription consumption.
5. Compare the review, then rerun tests on the base branch after integration.

Frequently asked questions

Does Singularity replace IntelliJ IDEA or PyCharm?

Not for everyone. Singularity has an editor, language servers and terminals, but not the analysis and debugging depth of a JetBrains IDE. Many users will be better off keeping both.

What is the difference between AI Assistant, Junie and Air?

AI Assistant groups the IDE’s AI features. Junie is JetBrains’ coding agent, in the IDE, as a CLI and in CI. Air orchestrates several agents, as a standalone app, in the IDEs, on the web and in the cloud.

Do I need a JetBrains AI subscription for Air?

Not necessarily: Air accepts an Anthropic, OpenAI or Google account, an API key or an ACP agent. Cloud tasks, however, require a JetBrains AI subscription.

Does my data leave my machine with Singularity?

Singularity does not send your code to an intermediary service. Model traffic goes through the provider CLIs you configure, except with a local model through Ollama.

To go further, browse all Singularity comparisons, follow the getting started guide or download Singularity.