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OpenErrata

Crowdsourced, inline LLM investigations of the things you're reading.

Users36Current public install base

Rating--Store average score

Reviews0Public review volume

Manifest versionV3Extension platform version

7-day growth+2Net users gained this week

7-day growth rate+5.71%Relative weekly velocity

Preview

OpenErrata Media preview

1 assets

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00%

7-day growthGrowing

+2+5.71%

30-day growthGrowing

+1+2.78%

Technical snapshot

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Version0.3.2

ManifestV3

Size217KiB

Languages1English (United States)

Published--

Store updated--

Last crawled--

Overview

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OpenErrata fact-checks posts on Wikipedia, X, LessWrong, and Substack using frontier AI models with web search.

When you visit a post that's been investigated, incorrect claims get a red underline. Hover for a summary of what's wrong. Click for full reasoning and source links. Posts with no issues show nothing — the extension stays out of your way.

How it works:

- The AI reads the full post, searches the web, and identifies claims that are demonstrably incorrect

- Only flags things with concrete evidence against them — disputed claims, jokes, and ambiguity are left alone

- Every investigation is public and auditable: the prompt, reasoning, and sources are all inspectable

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