SpaceX Buys Cursor for $60B: The Builder’s Checklist for Q3 2026

The AI code editor most of us use to build websites just got bought by SpaceX for $60 billion. This means your session data—including client code—is about to start feeding Grok’s training pipeline. This isn’t a future problem; the deal is expected to close in Q3.

This isn’t a post about the news. This is the builder’s checklist for what to do right now. Here is the exact file to protect your work and the audit I’d run on any agency’s stack before the quarter ends.

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What is the SpaceX acquisition of Cursor?

The SpaceX acquisition of Cursor is a $60 billion all-stock deal for Anysphere, Inc., the parent company of the AI-native code editor. Announced on June 16, 2026, the deal integrates Cursor’s technology and user data into SpaceX’s xAI division. The primary goal is to use code from Cursor sessions to train and improve its Grok large language models.

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The .cursorignore File to Protect Your Code

A `.cursorignore` file tells the Cursor editor which files and folders to exclude from its AI features and context-awareness, preventing sensitive data from being processed or indexed. You place this file in your project’s root directory, just like a `.gitignore` file, to maintain code privacy. It is the single most important safeguard you can implement today.

# .cursorignore
# Lines starting with # are comments.
# This file works like .gitignore.

# Ignore node modules and build outputs
node_modules/
dist/
build/

# Ignore environment variables and local configs
.env
.env.*
!/.env.example

# Ignore secrets and keys
*.key
*.pem
secrets.json
wp-config.php

# Ignore client-specific sensitive directories
/client-data/
/private/

# Ignore logs and temporary files
npm-debug.log*
yarn-debug.log*
yarn-error.log*

Create a file named `.cursorignore` in the main folder of your project and paste this content into it. This simple action prevents your most sensitive files—API keys, database credentials, and environment variables—from ever being sent to Cursor’s backend, and by extension, to SpaceX’s training models.

+------------------+      +------------------+      +-----------------+
| Your Project     |      | .cursorignore    |      | Cursor AI       |
| (wp-config.php)  |----->| (Blocks file)    |--X-->| (No access)     |
+------------------+      +------------------+      +-----------------+

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Here’s exactly how I’d do this

To handle the Cursor acquisition, I would run a four-step audit to secure client data, implement safeguards, and evaluate long-term tool choices. The process starts by identifying which projects are at risk, then applying the `.cursorignore` file universally, testing independent alternatives, and finally communicating the new policy to clients and the team.

1. Identify At-Risk Projects. Make a list of every project where you or your team has used Cursor. Pay extra attention to client projects with proprietary code, sensitive data (like `wp-config.php` files), or API keys checked into the repository.
2. Deploy the `.cursorignore` File. Take the asset from this post and add it to the root directory of every single one of those at-risk projects. This is your immediate, non-negotiable safety net. Commit it to the repository so it protects every developer on the team.
3. Test Two Alternatives. Spend an afternoon with two independent alternatives. My top picks are Claude Code (using the `–project` flag for full codebase awareness) and Replit’s agent. The goal isn’t to switch immediately, but to have a tested, viable backup plan ready to go.
4. Communicate with Clients. For your key accounts, send a short, proactive email. Explain that you’ve implemented new safeguards to protect their code in light of industry changes. This builds trust and shows you’re on top of the security landscape.

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What this changes for designer-run agency work

This acquisition changes the risk profile for agencies using AI coding assistants, shifting the conversation from pure productivity to data sovereignty and client IP protection. The default choice of IDE is no longer just a personal preference but a strategic decision with security implications that must be communicated to clients. The landscape of AI-native IDEs now has a clear dividing line.

Dimension	Cursor (Post-Acquisition)	Claude Code / Independent Tools
Data Use	Session data feeds Grok training pipeline	Data is private to your session; not used for training
Control	Dependent on SpaceX/xAI roadmap and terms	Full control; not tied to a larger platform’s agenda
Risk Profile	Higher risk for sensitive client IP	Lower risk; clear data privacy policies
Client Conversation	Requires explaining data exposure and safeguards	Simpler story: “We use tools that protect your IP.”

When I first started using AI to build websites, the main question was which tool was fastest. Now, the first question has to be which tool is safest. This is a fundamental shift for anyone building for clients, and it’s why understanding tools like the ones in my Talk-to-Build stack is no longer optional.

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My $0.02 — How I’d roll this out

I’d treat this as a focused three-day sprint to audit my exposure, implement safeguards, and make a final decision on my team’s primary AI code editor. The goal is to move deliberately, protect client IP without disrupting workflow, and establish a clear policy before the acquisition closes in Q3. This isn’t panic, it’s just good business hygiene.

Day 1 — Audit and Containment. The first day is about understanding the blast radius. I’d create a master list of all active and recent projects. For each one, I’d ask: has Cursor ever touched this codebase? If yes, I’d immediately drop the `.cursorignore` file into the root directory and commit it. By the end of Day 1, the immediate leak is plugged.

Day 2 — Test Alternatives. I’d block four hours for the whole team to test drive the top two independent alternatives—likely Claude Code and the latest Replit agent. The goal is to answer one question: can we ship client work with these tools at the same speed? I’d have everyone try to build one real component from a current project in each tool and share their findings.

Day 3 — Decide and Communicate. Based on the testing, I’d make a decision. Maybe it’s “Cursor is fine for non-sensitive projects, but Claude Code is mandatory for anything with a database.” Or maybe it’s a full switch. Whatever the new policy is, I’d write it down and share it with the team. Then, I’d draft that proactive email to clients explaining the measures we’ve taken.

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FAQ

Do I have to stop using Cursor?
Not necessarily, but you must audit what code you expose to it. Implementing a `.cursorignore` file is a critical first step to block sensitive files. For projects with high-value intellectual property, evaluating alternatives that guarantee data privacy is a smart precaution before the Q3 deal closes.

What is Grok?
Grok is a large language model developed by xAI, an artificial intelligence company now part of SpaceX. It is designed to access real-time information from the X platform and is known for a more conversational, sometimes humorous tone. The Cursor acquisition will provide it with a massive new dataset of code to improve its capabilities.

How does a `.cursorignore` file work?
A `.cursorignore` file works just like a `.gitignore` file. It’s a plain text file in your project’s root directory that lists files and folders for Cursor to ignore. When Cursor’s AI features index your project for context, they will skip anything matching the patterns in this file, preventing it from being processed.

Will Cursor’s pricing change after the acquisition?
No pricing changes have been announced as part of the acquisition. Cursor’s current pricing tiers remain in effect. However, it is common for pricing and plan structures to be reviewed and adjusted following a major acquisition, so builders should monitor official announcements later in the year.

Is my client’s code safe if it was used in Cursor before this?
Code used in past sessions was subject to Cursor’s previous terms of service. The primary concern is future use, as session data will feed the Grok training pipeline post-close. Proactively adding a `.cursorignore` file now prevents future exposure of sensitive parts of your codebase.

What are the best alternatives to Cursor for data privacy?
The best alternatives are tools with explicit policies against training on user code. Claude Code, when used via the API or Pro web interface, does not train on your data. Similarly, GitHub Copilot has settings to disable data collection, and Replit offers private environments for its AI features.

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Part of the AI Pulse series. If you commented “STACK” on one of my videos — this is the breakdown. Sources: TechCrunch, CNBC.

Last updated: 2026-06-26.