Extensions and plugins install into a host runtime — a browser, an IDE, or a package registry — and run in its context: Chrome/Edge/Firefox/Safari extensions, VS Code and JetBrains plugins, or npm and Docker Hub packages. They reach end users and developers directly rather than through a business admin.
The build model is the host’s extension platform (Manifest V3 for browsers, the editor’s plugin API, or a package spec), and auth for the store itself is often minimal — many extensions call their own backend via OAuth only when they need identity. Review centers on permissions and data handling; the tradeoff for that scrutiny is enormous, low-friction distribution.
Google LLC
Distribution store for Chrome browser extensions, themes, and progressive web apps.
Microsoft Corporation
Store for Edge browser extensions, largely Manifest V3-compatible with Chrome Web Store submissions.
Mozilla Foundation
Open, community-oriented store for Firefox WebExtensions and themes.
Squarespace, Inc.
Squarespace's curated marketplace of OAuth-authenticated third-party connectors — shipping, fulfillment, inventory, and marketing services that plug into Squarespace Commerce stores.
PrestaShop SA
The official marketplace for the self-hosted open-source PrestaShop platform, selling PHP modules and themes that install directly into merchants' stores.
Odoo S.A.
Large module marketplace for the open-source Odoo ERP/CRM suite, publishing free and paid apps, themes, and connectors per Odoo version.
Formagrid, Inc. (Airtable)
React-based embedded extensions that add visualizations, tools, and integrations inside Airtable bases, published through a reviewed CLI submission.
Opera Norway AS
Opera's official catalog for Chromium-based WebExtensions, free to publish but subject to slow human moderation.
Raycast Technologies Ltd.
Open-source extension store for the Raycast launcher, published via GitHub PR review, free and MIT-licensed, with AI-agent tool support.
Apple Inc.
Safari's browser extensions, distributed only as App Store apps under Apple Developer Program terms and full App Review.
Microsoft Corporation
Microsoft's official marketplace for VS Code extensions, published via the vsce CLI with no built-in paid model.
JetBrains s.r.o.
JetBrains' official plugin marketplace for its IDE family, with built-in paid sales and a 15% commission as merchant of record.