PlugThis

What PlugThis is

PlugThis calls itself a "Chrome extension builder powered by AI". It is a narrow tool by design: you describe the browser extension you want in plain English and it returns the code for a Manifest V3 extension, "Describe what you want, get a working Manifest V3 extension in under two minutes." It is written for people who want a custom extension without hiring a developer: founders testing an idea, freelancers and agencies delivering client work, and makers rebuilding a paid extension they would rather own.

What you build and how

The workflow. Everything starts in chat. The docs say "Describe the extension in one paragraph and PlugThis returns the full Manifest V3 bundle", meaning the manifest, content scripts, popup, background service worker and icons. To change something you reply with what to change, and "No code edits required." The docs also describe a built-in code editor with syntax highlighting and a live preview where edits show up in real time, so a person who reads code can adjust it directly. The advice on prompts is to be specific about what the extension should do.

Installing the result. The home page puts it simply: "Install. Done. Load the folder into Chrome. Use it immediately." The output is an ordinary extension folder, and the FAQ says you can "open in any code editor, modify however you want, and load into Chrome without PlugThis". The Starter plan lists "Build & ship to the Chrome Web Store", and the pricing page notes that "downloading your extension, publishing it and using it cost nothing" beyond the chat that produced it.

Backends. The home page lists "Real Backends. Not Toys." If an extension needs user login, a database or server logic, you "Connect your Supabase account and PlugThis writes the backend code for you." The Builder plan is the one that lists "Full-stack (Supabase + LLM)".

AI inside your extension. The home page says "Plug in your OpenAI or Gemini key" for extensions that write, summarize, translate or reply. The docs add Anthropic to the list and explain that AI is optional, that you bring your own key, and that "The key lives in your extension's storage and never touches our servers." The cost of those model calls is therefore yours and sits outside the PlugThis plan.

What people make. The alternatives section lists extensions grouped by category (Productivity, AI Tools, Developer Tools, SEO and Marketing, Writing, Research and Learning, Sales and Outreach, Shopping). Examples include a Notion Web Clipper alternative with AI summary and auto-tagging, rewriting extensions in the style of Wordtune and QuillAI, a YouTube summarizer modeled on Eightify, web highlighters modeled on Glasp and Liner, a LinkedIn outreach extension modeled on Closely, and a private coupon finder modeled on Honey. The site also offers free tools, a Manifest V3 Generator for a one-off manifest.json and a Permissions Explainer that describes what a permission does before you request it, plus templates, guides and a "/rebuilds" video series.

Ownership and commercial use. Every plan "includes ZIP export and full code ownership". The docs state that generated extensions are "standalone", with "no licensing, no API keys phoning home, no PlugThis dependency at runtime". The home page adds that you can sell extensions, build for clients and white label on all tiers, with "no royalties, no revenue sharing, no restrictions on commercial use". It claims that "Freelancers and agencies use PlugThis to build Chrome extensions and charge clients $1,000-$15,000 per project."

Privacy. The docs say prompts and generated code "are not used to train AI models" and that extensions "run entirely in your browser" with "no analytics, no telemetry".

The evidence from the pages

Starter. $9.99 a month, cancel anytime. It covers 1 extension, unlimited chats to build and refine it, shipping to the Chrome Web Store and ownership of all code.

Builder. $29.99 a month, marked "Most popular". It covers 3 extensions, unlimited chats to build and refine them, full-stack with Supabase and an LLM, and priority support.

Fair use. The pricing page footnote says "No per-chat limit and no counter in your way. A high monthly cap exists to stop abuse, and if you ever come close we email you first." One chat is "one build or one edit". The docs add "No per-seat fees, no surprise add-ons."

Free tier. The free builder page says the free tier includes enough builds to ship your first one or two working Chrome extensions, with no credit card, no watermark and output identical to what paid users get, and that heavier use hits the free tier limit. It describes it as a way to "verify PlugThis actually works for what you want to build before paying." That page sketches the paid side as starter for personal projects, builder for active makers and an agency tier for teams shipping extensions for clients, while the home page FAQ says "two plans, monthly billing" and the pricing page lists Starter and Builder. The free page also says "There's no commercial-use restriction on free-tier output."

Lifetime tiers. The home page FAQ mentions AppSumo lifetime tiers, which include a monthly build allowance rather than the unlimited refinement chats of the paid monthly plans.

Refunds. The home page FAQ says that if the generated code does not work, "email us within 7 days and we refund every cent. You keep everything you built." The docs FAQ is more guarded: "Fees are generally non-refundable except as required by law," and it points problems to support@plugthis.ai.

Support. The home page FAQ lists email support answered within one business day, a help center and video walkthroughs on the company's YouTube channel, with priority support on Builder.

Cancelling. The home page FAQ says it is a monthly plan you can cancel from your account settings, with "No lock-in, no exit fees", and that "The extensions you've already built stay on your machine and keep working forever." That follows from the standalone output: nothing in a downloaded extension calls back to PlugThis, so a lapsed subscription stops new builds and edits but does not switch off what you shipped. The same FAQ also explains BYOK, short for bring your own key, as the reason AI features in your extension cost little or nothing on the PlugThis side, since you pick the provider and control the bill. It names OpenAI, Gemini and Groq as the keys you configure in Settings, says costs often stay under $1 a month, and adds that PlugThis never charges a per-token fee on that spend.

Speed and the Web Store. The FAQ says the first working version arrives in about two minutes, each iteration takes another minute or two, and most people go from idea to finished extension in 15 to 30 minutes. Generated code follows Chrome Web Store policies, with minimal permissions and no remote code execution, so the common rejection reasons are handled by default; you still need your own Chrome Developer account, which the FAQ says carries a one-time fee from Google, and you write the store listing yourself.

Cost comparison. The docs put a custom Chrome extension built by a developer at one to six weeks and $2,000 to $10,000+, against a working PlugThis build in under two minutes. That comparison is the company's own.

Who it suits and who it does not

PlugThis fits a maker who has a specific Chrome extension in mind, whether a personal tool, a product to sell or a client deliverable, and wants the source code in hand. The two paid plans are priced per extension count, so a freelancer with several client projects will look at Builder's 3 extensions.

Caveats. It builds Chrome extensions and nothing else, so it will not make a web app, a store or an internal portal. Starter covers 1 extension, and the backend path needs your own Supabase account. If your extension uses AI, you carry the model costs and keys yourself. The FAQ itself says highly specialized enterprise extensions with complex native integrations may need a developer for the final stretch.