ExtensionStart vs the alternatives
Comparison pages written by a vendor deserve skepticism, so ours follow three rules: every claim about another product is checked against their live site or repository and carries the date we checked it; we link to them so you can verify; and we say what they do better, including when the honest answer is that you don't need a paid kit at all.
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Paid starter kit
ExtensionStart vs ExtensionFast
The closest like-for-like comparison: another paid WXT + React + Firebase + Stripe kit at the same price point. The differences are in testing depth, publishing automation, and paywall tooling.
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Free framework
ExtensionStart vs WXT
Not a competitor: ExtensionStart is built on WXT. What the free framework handles for every extension, and what the kit adds on top of it.
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Free framework
ExtensionStart vs Plasmo
A free extension framework and a WXT alternative. Where Plasmo stands in mid-2026, with dates, and why this kit is built on WXT instead.
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Free starter kit
ExtensionStart vs Extro
A genuinely good free, open-source WXT starter by TurboStarter. If you don't plan to charge for your extension, it may be all you need; we say so on the page.
One category note: Plasmo, WXT, and CRXJS are frameworks, free build tooling you'll use whichever kit you pick (or none). ExtensionStart is a kit: a monorepo of product code (auth, billing, a paywall gate engine, tests, a backend, publishing CI) built on WXT. "Framework vs kit" is not a fair fight in either direction, which is why those pages read differently from the ExtensionFast one.