ManifestGo

What it is

ManifestGo is a narrow AI builder with one job: it generates complete Chrome extensions from a single plain-English prompt. The site calls it "an AI Chrome extension builder" and promises an installable Manifest V3 extension in one pass. That puts it in a different lane from general AI app builders, and the company is open about it. In its own comparison, the trade-off it lists for itself is that it is "focused only on Chrome extensions" and is not a general web app builder.

The reader it targets is stated directly in the FAQ: "Founders and non-developers can ship real extensions from a single prompt. Developers can also refine every file directly." The pages do not say where the company is based or when it started, though the footer carries a 2026 copyright.

What you build and how

The workflow has three steps on the home page. You write a prompt describing the extension, the AI generates the code and manifest, and you download a .zip and install it. The site's own examples show the scale of idea it expects: a pomodoro timer in the toolbar, a tool that blocks distracting sites by domain, one that saves highlights to a personal library, and one that translates selected text inline.

If you would rather not start from a blank prompt, the home page offers 8 generators, each of which opens an editable prompt and then builds a full extension: a website blocker, a YouTube customizer, a price tracker, an AI page summarizer, a form autofill tool, a screenshot and annotate tool, a tab manager and a dark mode extension. The site also links to a page of real generated code, templates, examples and idea lists.

What comes out is a full Manifest V3 project. The FAQ lists the pieces: a popup, a background service worker, content scripts, an options page and icons, plus a live preview and a ready-to-install .zip. Every project uses manifest_version 3, a background service worker, MV3 action popups, declarative content scripts and least-privilege permissions by default. The company says it validates the manifest before download, and the comparison page says it does this deterministically. On icons, the home page lists 16, 48 and 128 pixel sizes while the comparison page lists 16, 32, 48 and 128, so check the downloaded folder for the exact set.

The editor is a chat plus a file view. Follow-up messages "patch the project" rather than regenerate it, and the company says every file is editable. Each build is snapshotted into immutable version history, so you can roll back if an edit goes wrong. You can see the popup update as it builds through the live preview.

Complexity is covered on the site. It says ManifestGo can build multi-surface extensions that combine a popup, an options page, a background worker, content scripts and context menus. It also says it can build full-stack extensions with a login and a database. In that case it ships real Supabase or Firebase authentication, per-user database reads and writes, persisted sessions, encrypted API keys and third-party API integrations. All of it is owned by the background service worker "so no credential ever reaches page context." A secrets vault keeps API keys out of the bundled extension.

For the person who is not a developer, the install step is plain. You download the .zip, unzip it, open chrome://extensions, enable Developer Mode, click Load unpacked and pick the folder. For distribution, the company says you can publish under your own Chrome Web Store developer account, and that no attribution or lock-in is required.

What the pages state

Pricing is short and public. The Starter plan is $5 a month for 100 credits, and the Pro plan is $15 a month for 300 credits. The site says unused credits roll over month to month while you stay subscribed, building up for up to 3 months. The comparison page adds a 14-day money-back guarantee, and the footer links a refund policy. The pages do not describe a free plan; the comparison page says ManifestGo "starts at $5/month."

The home page includes a comparison table against ChatGPT, Lovable, Bolt and Cursor. By the company's reading, only ManifestGo ships a real Chrome extension, builds Manifest V3 by default, includes an encrypted secrets vault, builds from one prompt, shows a live popup preview and produces a one-click .zip. The table credits Lovable and Bolt with web-only apps, and marks ChatGPT and Cursor as manual for Manifest V3. It lists starting prices of $5 a month for ManifestGo and $20 a month for each of the other four. That is a vendor's own table, so read it as positioning.

The separate alternatives page compares 6 approaches. It names two other dedicated AI extension builders, PlugThis and Kromio, and says to see their sites for pricing. It describes Lovable as a React web app builder that does not target Manifest V3 packaging or Chrome APIs, Cursor and Copilot as editor assistants where you still scaffold the manifest, icons, permissions and packaging yourself, and hand-coding as the slowest path, since MV3 service-worker and permission rules are easy to get wrong.

On store review, the company is measured. The FAQ says AI-generated extensions can pass Chrome Web Store review "provided the extension requests only the permissions it actually uses, includes a valid privacy disclosure, and does not inject remote code." It adds that manifest verification and generated icons remove the most common rejection causes. On data, it says secrets live in the project vault and stay out of the bundled extension, and that your generated code is yours.

The pages publish no customer count, no compliance certifications and no list of supported browsers beyond Chrome.

Who it suits and who it does not

ManifestGo suits a founder or operator who wants a browser extension, such as a site blocker, a page summarizer, a form filler for an internal tool or a price tracker, and who has never written a manifest file. It suits a developer who knows what they want but would rather not scaffold boilerplate, because the code arrives unminified and editable. It also suits someone testing an idea, since the entry price is $5 a month with a stated refund window.

The scope is the main limit. Everything on the site is about Chrome, and the company says plainly that it is not a general web app builder. If your idea needs a website, a mobile app or a dashboard, you need a different tool. Credits are the second consideration. Starter's 100 credits and Pro's 300 do not come with a statement of how many credits one build or one follow-up edit consumes, so a long refinement session is hard to price in advance. And while the comparison page says generated extensions can pass review, publishing still means your own developer account, a privacy disclosure and the store's process.