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March 2026 was Cursor's biggest month yet. Three announcements that reshape its competitive position: JetBrains IDE support (March 4), Composer 2 — their own coding model (March 19), and self-hosted cloud agents for enterprise (March 25). Oh, and they crossed $2 billion in annualized revenue.

Here's what each change means for your workflow and your wallet.

1. Cursor in JetBrains IDEs (via ACP)

The biggest knock against Cursor has always been: "I'd use it, but I'm not leaving IntelliJ." That objection is gone.

On March 4, Cursor became available inside IntelliJ IDEA, PyCharm, WebStorm, and other JetBrains IDEs through the Agent Client Protocol (ACP) — a new open standard built by JetBrains and Zed that standardizes how IDEs communicate with AI coding agents.

How It Works

• ACP is like LSP (Language Server Protocol) but for AI agents — a standardized interface between your IDE and an external AI
• Cursor runs as an external agent, not a plugin fork — you keep JetBrains' full refactoring, debugging, and code quality tools
• Requires JetBrains 2025.3.2+ with the AI Assistant plugin enabled
• No JetBrains AI subscription required — you authenticate with your existing Cursor account

What You Get

• All frontier models: OpenAI, Anthropic, Google, and Cursor's own Composer 2
• Secure codebase indexing and semantic search
• Multi-file editing through Cursor's agent mode
• Same features as the VS Code fork, running inside JetBrains

Why This Matters for Pricing

Previously, choosing Cursor meant abandoning your JetBrains license (and its ecosystem). Now you can use both. A developer on JetBrains Ultimate ($24.90/month) + Cursor Pro ($20/month) gets the best of both worlds — though that's $45/month total, which is pricier than alternatives like Copilot Pro ($10/month) or JetBrains AI ($8.33/month).

2. Composer 2: Cursor's Own AI Model

On March 19, Cursor launched Composer 2 — a proprietary code-only AI model optimized for multi-file edits, refactoring, and long-running coding tasks.

Pricing

Tier	Input	Output
Standard	$0.50/M tokens	$2.50/M tokens
Fast	$1.50/M tokens	$7.50/M tokens

For context, that makes Composer 2 Standard cheaper than Claude Sonnet ($3/$15 per M tokens) and significantly cheaper than GPT-4.1 for coding tasks. Cursor claims it outperforms Opus 4.6 on some benchmarks while trailing GPT-5.4 — but at a fraction of the cost.

For Cursor Pro ($20/month) subscribers, Composer 2 is available within your existing fast request allocation — no extra cost unless you exceed your plan limits.

3. Self-Hosted Cloud Agents (Enterprise)

This is the enterprise play. On March 25, Cursor launched self-hosted cloud agents that keep all code and tool execution inside your own infrastructure.

How It Works

• Agent planning/inference runs in Cursor's cloud
• Tool calls (file reads, builds, tests) execute on your machines
• Workers connect outbound via HTTPS — no inbound ports, no VPN tunnels, no firewall changes
• Code, build outputs, and secrets never leave your network

Deployment Options

• Quick start: agent worker start
• Kubernetes: Helm chart with WorkerDeployment resources and autoscaling
• Fleet management API: For non-Kubernetes environments

Who's Using It

Cursor named three enterprise customers: Brex (financial services), Money Forward (deploying across ~1,000 engineers with Slack integration), and Notion. All three are in sectors where code leaving the network is a compliance non-starter.

What This Means for the Market

Cursor's March moves address its three biggest weaknesses:

1. "I can't leave JetBrains" → JetBrains ACP support (solved)
2. "It's too expensive at scale" → Composer 2 cuts model costs (partially solved)
3. "My company won't approve cloud-based code access" → Self-hosted agents (solved)

The competitive landscape is shifting fast. Windsurf just raised prices to match Cursor at $20/month. Copilot has broader IDE support but no self-hosted agent option. Claude Code runs locally by default but lacks the visual IDE experience.

Cursor by the Numbers (March 2026)

• Valuation: $29.3 billion (reportedly raising at $50B)
• Revenue: $2B+ annualized (crossed in February 2026)
• Revenue growth: $500M (May 2025) → $1B (Oct 2025) → $2B+ (Feb 2026)
• Fortune 500 adoption: 67% of Fortune 500 companies
• Code output: 150 million lines of enterprise code generated daily

Should You Switch to Cursor?

Consider Cursor if:

• You were waiting for JetBrains support — it's here now
• You want agent mode with background/cloud agents
• Your company needs self-hosted code execution for compliance
• You want access to Composer 2 alongside Claude, GPT-4.1, and Gemini

Stick with your current tool if:

• You're happy with Copilot's GitHub integration and lower price ($10/month Pro)
• You prefer terminal-native workflows (Claude Code is better suited)
• $20/month for an individual seat is more than you want to spend — check free alternatives

For head-to-head matchups, see Copilot vs Cursor, Cursor vs Windsurf, or Cursor vs Claude Code. Or use the cost calculator to model your exact team costs.