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It's a split decision.
Choose GitHub Copilot if you want an AI agent tied to GitHub issues, pull requests, and repository history, with sessions that continue across the CLI, editor, web, app, and mobile. Choose IntelliJ IDEA if you need a code-aware IDE for Java and Kotlin, with built-in tools to run, debug, and test applications. They serve different roles: Copilot is an agent across GitHub workflows, while IntelliJ IDEA is the development environment.
01Side by side
| GitHub Copilot | IntelliJ IDEA | |
|---|---|---|
| Pricing model | Paid plans start at $10 per user monthly. | Individual Ultimate starts at $16.58 monthly, billed annually. |
| Free tier | 2,000 monthly completions; free plan requires no card. | Free for commercial and non-commercial use; AI Free has 3 credits per 30 days. |
| Integrations | Connectors, MCP servers, skills, plugins, and third-party agents. | JetBrains cites a Kotlin ecosystem of tools, libraries, and integrations. |
| CLI and workflow | CLI included; sessions continue across GitHub surfaces. | IDE workflow includes built-in run, debug, and test tools. |
| Deployment model | Agent integrated into GitHub workflows and surfaces. | IDE for Java and Kotlin development. |
| Platforms | Web, macOS, CLI, mobile, Slack, and Teams. | Homepage lists IntelliJ IDEA as an IDE. |
| Limits and scaling | Paid plans include AI credits; additional credits are available. | AI Free includes 3 credits per 30 days; top-ups cost $1 per credit. |
| Codebase context | Uses repository code, issues, pull requests, and search results. | Uses code knowledge for navigation and relevant suggestions. |
GitHub Copilot Choose GitHub Copilot if
- Choose GitHub Copilot if you want an agent connected to GitHub issues and pull requests.
- Choose GitHub Copilot if you delegate parallel tasks or automate recurring agent work.
- Choose GitHub Copilot if you want to resume coding tasks across GitHub surfaces.
IntelliJ IDEA Choose IntelliJ IDEA if
- Choose IntelliJ IDEA if Java or Kotlin is your primary development language.
- Choose IntelliJ IDEA if you want run, debug, and test tools inside your IDE.
- Choose IntelliJ IDEA if you need a code-aware IDE with configurable workflows.
02Pricing at real usage
Copilot Free costs $0 and includes 2,000 completions per month. Pro is $10 per user monthly, with $15 in monthly AI credits and a $5 flex allotment; Pro+ is $39 with $70 in credits and $31 flex; Max is $100 with $200 in credits and $100 flex. The pricing page also lists additional AI credits for purchase. IntelliJ IDEA’s free tier covers commercial and non-commercial use, with AI Free including 3 credits per 30 days. Ultimate for individuals is $19.90 month-to-month or $199 for the first year billed annually. For organizations, Ultimate is $71.90 per user monthly or $59.92 per user monthly when billed annually. The individual AI Pro add-on costs $10 monthly or $100 annually. Compare actual AI-credit use as well as seat cost: the plans meter AI differently.
03API, SDKs and integration
GitHub presents Copilot as an AI coding agent in GitHub’s workflow, not as a standalone API product. Its sessions can use repository code, issues, pull requests, and search results. GitHub lists Copilot Connectors, MCP servers, skills, and plugins, and says Copilot CLI is included in the Free plan. The homepage also describes work continuing across the app, CLI, editor, github.com, and GitHub Mobile. Its examples emphasize GitHub tasks, code review, and recurring automation rather than language-specific SDK integration.
JetBrains presents IntelliJ IDEA as an IDE for Java and Kotlin, with support for a wide range of languages and frameworks. Its homepage highlights code-aware navigation and built-in tools for running, debugging, and testing applications. JetBrains also describes a broader Kotlin ecosystem of tools, libraries, and integrations, without naming IntelliJ-specific integrations. The product pages do not establish a public API or SDK contract for either product. For an integration plan, distinguish Copilot’s listed GitHub workflow connections from IntelliJ IDEA’s IDE features, and confirm supported interfaces with the vendors.
04Open source, self-hosting and lock-in
The product pages do not establish an open-source licence or a self-hosting option for either product. Ask the vendors about licence terms and deployment requirements before adopting either for a regulated or air-gapped environment.
Copilot’s described workflow connects tasks to GitHub issues, pull requests, and repository history, and its sessions can move across GitHub surfaces. That makes GitHub workflow context central to how the agent is presented. IntelliJ IDEA is presented as an IDE with code-aware navigation and built-in development tools. The pages do not describe data-export guarantees for either product, so we cannot compare export paths or estimate migration effort from them. Before committing, confirm how project context, settings, and any generated work can be retrieved, and assess how much your team’s workflow depends on vendor-specific features.
Questions people ask
Is GitHub Copilot a replacement for IntelliJ IDEA?
No. GitHub describes Copilot as an AI coding agent integrated into GitHub workflows. IntelliJ IDEA is an IDE for Java and Kotlin, with tools to run, debug, and test applications. A developer may use an IDE for daily coding and an agent for GitHub-connected tasks; they address different parts of the workflow.
Which is better for Java and Kotlin development?
IntelliJ IDEA is the direct fit if you want an IDE for Java and Kotlin. JetBrains highlights code-aware navigation, relevant suggestions, and built-in run, debug, and test tools. Copilot can assist with coding tasks and repository context, but its product positioning is as a GitHub-native agent rather than a Java or Kotlin IDE.
Does GitHub Copilot have a free plan?
Yes. Copilot Free costs $0 per user monthly and includes 2,000 completions per month, access to listed models, and Copilot CLI. GitHub’s pricing page says no credit card is required. IntelliJ IDEA also has a free tier for commercial and non-commercial use; its AI Free allocation is 3 credits per 30 days.
Can IntelliJ IDEA and GitHub Copilot be used together?
The product pages describe IntelliJ IDEA as an IDE and Copilot as an agent available across GitHub surfaces, including an editor. They do not specify IntelliJ IDEA compatibility or an IntelliJ-specific Copilot integration. Check GitHub’s and JetBrains’ current integration documentation before making compatibility a requirement.