No. €67, one time. LinkedPen is yours to keep, update, and customise. The only ongoing cost is the Claude API — typically €1–5/month at normal commenting volume. No platform fee. No monthly charge. You own the tool.

Two things: a free Anthropic or OpenAI account (for the API key) and Chrome. That's it. If you want to build it yourself, you'll also need the Claude desktop app, free download, and a Claude subscription. Honest take: if you're running a business in 2026 without an LLM subscription, that's the gap to close first. One AI subscription. Everything else, you build.

Your free Anthropic account comes with credits to get started. After that, usage costs are pay-as-you-go: typically €1–5/ month for normal commenting use. Compare that to €20+/ month for a subscription tool you don't own. The maths aren't close.

No. LinkedPen generates the comment. You read it, tweak it if you want, and post it yourself. Your name, your call, every time.

That's the whole point. Once you've built it, the code is yours. Adjust the prompts, add new comment modes, connect different brand documents — anything. A subscription tool never gives you that. This one does.

It works. Add basic brand info directly inside the extension settings. But with your Foundation Kit documents uploaded, LinkedPen knows your voice, your ICP, your offer, and your objections - and the quality jump is significant. If you haven't done the Foundation Kit yet, that's the starting point.

It's educational example code: a fully working Chrome extension provided as the practical centrepiece of this course. It demonstrates the exact concepts the course teaches you to build. It's not commercial production software and hasn't been through a formal security audit. It's open code: you can read every line, understand every decision, and change anything you want. That's the point. If you want to review the source before using it, and we'd encourage you to, the course makes that possible.

This is exactly why owning the knowledge matters more than owning a subscription. If LinkedIn's structure changes or the API updates, a subscription tool goes silent and you wait for a fix from someone else. With LinkedPen, Module 5 gives you the understanding to update it yourself. Module 6 covers the specific update process. You're not dependent on a vendor's release schedule. That's the trade: a little more understanding upfront, a lot more control long-term.

Everything runs locally in your browser. The extension processes content that's already displayed on your screen, it doesn't collect, store, or transmit any data to us. Nothing goes through our servers. If you use LinkedPen to process personal data (for example, information about other LinkedIn users), you're acting as the data controller under GDPR. For most solopreneurs commenting on public posts, this is a non-issue in practice. But you're responsible for how you use the tool, which is also true of every other tool you use.

Context and ownership. ChatGPT/ Claude doesn't know the post. It doesn't know you. It writes something plausible. LinkedPen reads the actual post in front of you, cross-references it with your brand DNA, and writes something grounded in who you actually are. And unlike a prompt you'll forget by next Tuesday, this is open code that lives in your browser, runs when you need it, and costs nothing extra per month.

One weekly session. Thirty targeted comments. Done. The Sprint covers how to choose the right posts, how to review LinkedPen's output efficiently, and how to post in a rhythm that keeps your profile active without burning you out. It's not a theory: it's a repeatable weekly system.