x4doubt is a consumer product built for web users seeking to verify information.

Yes — there is a free tier, with paid plans for advanced use.

What platforms does x4doubt run on?

x4doubt runs on the web and embeddable surfaces.

Is x4doubt still maintained?

Unverified. x4doubt 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 projects are similar to x4doubt?

Similar projects tracked by PulseGate include verdikt, cliver, and ChatGPT Prompts Extension.

x4doubt is developed by x4doubt.

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x4doubt

Name: x4doubt
Author: x4doubt

x4doubt.comOther AI

x4doubt is a browser extension that leverages AI to instantly fact-check claims and web content as users browse. It allows users to verify information, save their history, and revisit past results, helping reduce misinformation online.

FreemiumWebEmbeddable

Visit x4doubt.com

Overview

5 features

In the Other AI space, x4doubt takes a focused approach. It focuses on fact-checking claims and web content instantly while browsing, reducing misinformation and uncertainty online. x4doubt is a consumer product aimed at web users seeking to verify information. There is a free tier. x4doubt is available on the web and embeddable surfaces.

It is developed by x4doubt, and it first shipped in 2026. Among its 5 catalogued features are fact-checking, browser extension, and AI-powered.

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

Fact-checking
Browser extension
AI-powered
History saving
Instant results

Built with & integrations

Framework

Next.js

Hosting

Vercel

Auth

clerk

Connectors

chromewebhook

Runs on

BrowserEmbeddable

Detected from

Next.js: x-powered-by header · /_next/static/ in the HTML · __next_f in the HTML
Vercel: x-vercel-id header · x-vercel-cache header

Trust & compliance

Verified signals

HTTPSPrivacy Policy Terms of ServiceStore-verified publisher

Legal

Indexing history

What PulseGate has recorded for this listing

Indexed27 Jun · 10:25 UTC
Listing verified against its public source
Source: PulseGate · Open

Frequently asked questions about x4doubt

What does x4doubt do?: X4doubt focuses on fact-checking claims and web content instantly while browsing, reducing misinformation and uncertainty online. It is catalogued under Other AI on PulseGate.
Who is x4doubt for?: x4doubt is a consumer product built for web users seeking to verify information.
Is x4doubt free?: Yes — there is a free tier, with paid plans for advanced use.
What platforms does x4doubt run on?: x4doubt runs on the web and embeddable surfaces.
Is x4doubt still maintained?: Unverified. x4doubt 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 projects are similar to x4doubt?: Similar projects tracked by PulseGate include verdikt, cliver, and ChatGPT Prompts Extension.verdikt cliver ChatGPT Prompts Extension
Who makes x4doubt?: x4doubt is developed by x4doubt.
When did x4doubt launch?: x4doubt first shipped in 2026.

At a glance

Platforms: Web
Languages: English
Built for: web users seeking to verify information
Model: B2C
Solves: Fact-checking claims and web content instantly while browsing, reducing misinformation and uncertainty online.

Registered as

Firefox Add-ons: x4doubt

Live coverage

Identity confidence: Medium · 72.8
Indexed: 27 Jun 2026
Lifecycle: Unverified
Last seen: 27 Jun 2026

Identity audit (12)

Slug: x4doubt-x4doubt-com
Verification state: Indexed for public listing
Listing state: Listed: yes
Index status: Included in index
Latest evidence snapshot: 27 Jun 2026
Timeline basis: Indexed-at chronology. This listing's first-seen date was written by the catalog backfill, not observed here, so it is not treated as a sighting.
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: 27 Jun 2026
Canonical URL: https://x4doubt.com/

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Also in Other AI

Same category — not a similarity match