Who is Unpaywall for?

Unpaywall is a consumer product built for researchers, students, and readers of scholarly literature.

Does Unpaywall have a free plan?

Yes — Unpaywall is free to use.

What platforms does Unpaywall run on?

Unpaywall runs on the web and embeddable surfaces.

Is Unpaywall still maintained?

Unverified. Unpaywall has not been re-checked since it entered the index, so there is no finding either way — and only a positive finding would say otherwise.

What are alternatives to Unpaywall?

Similar projects tracked by PulseGate include Browser Extension, paywallr, and Unlock (Paywalls).

Who develops Unpaywall?

Unpaywall is developed by Unpaywall, based in the United States.

How long has Unpaywall been around?

Unpaywall first shipped in 2026.

Back to the index

Unpaywall

Name: Unpaywall
Author: Unpaywall

mozilla.orgBrowser DevTools & extensions🇺🇸

Unpaywall is a Firefox browser extension that identifies legal open-access versions of paywalled scholarly articles. It checks a public database and displays a green tab when a free copy is available, allowing readers to open the article without leaving the publisher page.

FreeWebEmbeddableCloud-managed

Visit mozilla.org

1alternative

6features

2026since

Overview

6 features

Unpaywall is a Browser DevTools & extensions project. It focuses on finding legal free versions of scholarly articles hidden behind publisher paywalls. It is built as a consumer product for researchers, students, and readers of scholarly literature. Unpaywall is free to use. It ships for the web and embeddable surfaces.

Behind Unpaywall is Unpaywall, based in the United States, and it first shipped in 2026. Among its 6 catalogued features are paywall detection, open-access matching, and Legal PDF links. The interface is available in 32 languages, including Czech, German, and Greek. It exposes integrations via a public API.

Summary written by a language model from the project’s public pages.

Paywall detection
Open-access matching
Legal PDF links
Green tab indicator
Publisher-page integration
One-click access

Built with & integrations

Connectors

API

Runs on

BrowserEmbeddableCloud-managed

Trust & compliance

Verified signals

HTTPSPrivacy Policy Terms of ServiceFree tierMulti-languageStore-verified publisher

Legal

Indexing history

What PulseGate has recorded for this listing

Indexed15 Sep · 11:22 UTC
Unpaywall verified via Firefox Add-ons
Source: Firefox Add-ons · Open

Frequently asked questions about Unpaywall

What does Unpaywall do?: Unpaywall focuses on finding legal free versions of scholarly articles hidden behind publisher paywalls. It is catalogued under Browser DevTools & extensions on PulseGate.
Who is Unpaywall for?: Unpaywall is a consumer product built for researchers, students, and readers of scholarly literature.
Does Unpaywall have a free plan?: Yes — Unpaywall is free to use.
What platforms does Unpaywall run on?: Unpaywall runs on the web and embeddable surfaces.
Is Unpaywall still maintained?: Unverified. Unpaywall has not been re-checked since it entered the index, so there is no finding either way — and only a positive finding would say otherwise.
What are alternatives to Unpaywall?: Similar projects tracked by PulseGate include Browser Extension, paywallr, and Unlock (Paywalls).Browser Extension paywallr Unlock (Paywalls)
Who develops Unpaywall?: Unpaywall is developed by Unpaywall, based in the United States.
How long has Unpaywall been around?: Unpaywall first shipped in 2026.

At a glance

Pricing: Free
Platforms: Web
First seen: 15 Sep 2026
Built for: Researchers, students, and readers of scholarly literature
Model: B2C
Solves: Finding legal free versions of scholarly articles hidden behind publisher paywalls.

Registered as

Firefox Add-ons: unpaywall-free

Index record

Indexed: 15 Sep 2026
Lifecycle: Alive
First seen: Sep 2026
Last seen: 15 Sep 2026

Identity audit (13)

Slug: unpaywall-mozilla-org
Lifecycle state recorded: 15 Sep 2026
Verification state: Indexed for public listing
Listing state: Listed: yes
Index status: Included in index
Latest evidence snapshot: 15 Sep 2026
Timeline basis: Indexed-at chronology (no inferred launch/funding milestones).
Name from: Derived from the project's own page and URL.
Category from: Assigned by a language model.
Summary from: Written by a language model from public pages.
Languages from: Detected by a language model, checked against the page's own declaration.
Last updated: 15 Sep 2026
Canonical URL: https://addons.mozilla.org/en-US/firefox/addon/unpaywall-free

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