Fact-Checking Systems LLM Tools

End-to-end pipelines and tools for verifying factual accuracy of LLM outputs, claims, and text through evidence retrieval, cross-referencing, and automated assessment. Does NOT include general document summarization, citation management, or browser extensions for other purposes.

There are 19 fact-checking systems tools tracked. The highest-rated is GAIR-NLP/factool at 49/100 with 916 stars and 53 monthly downloads.

Get all 19 projects as JSON

curl "https://pt-edge.onrender.com/api/v1/datasets/quality?domain=llm-tools&subcategory=fact-checking-systems&limit=20"

Open to everyone — 100 requests/day, no key needed. Get a free key for 1,000/day.

#	Tool	Score	Tier	Stars	Language
1	GAIR-NLP/factool FacTool: Factuality Detection in Generative AI	49	Emerging	916	Python
2	multimodal-ai-lab/DEFAME Fact-checking system for textual and visual inputs.	43	Emerging	48	Python
3	BharathxD/ClaimeAI This AI fact-checking system, built with LangGraph, dissects text into...	39	Emerging	94	TypeScript
4	metareflection/claimcheck Dafny verifies proofs; claimcheck confirms intent.	33	Emerging	16	JavaScript
5	TimLukaHorstmann/T-REX Real-time fact-checking of tabular claims with SOTA reasoning LLMs.	32	Emerging	5	JavaScript
6	iacobp/fact-checker This tool allows Perplexity Pro users to fact-check selected text on any...	29	Experimental	10	JavaScript
7	grave021999/ai-fact-checker-pipeline 💡 A full-stack AI-powered fact-checker pipeline that extracts claims from...	27	Experimental	1	Python
8	DecafSunrise/Ground-Truthing-GPT3.5 Fact checking OpenAI's GPT-3 with structured queries from the Wikidata Taxonomy	25	Experimental	5	Jupyter Notebook
9	hasaniqbal777/openfactcheck An Open-source Factuality Evaluation Demo for LLMs	20	Experimental	32	Python
10	ssu-humane/HerO The code for HerO: a fact-checking pipeline based on open LLMs (the...	20	Experimental	14	Python
11	PRAISELab-PicusLab/generative-agents-crowdsourced-fact-checking A framework for simulating crowdsourced fact-checking with generative agents...	16	Experimental	1	—
12	sabber-slt/fact-yab This is a Chrome browser extension that allows users to fact-check tweets...	15	Experimental	28	CSS
13	PRAISELab-PicusLab/CER ✔️🩺 Combining Evidence and Reasoning for Biomedical Fact-Checking	14	Experimental	4	Jupyter Notebook
14	almogtavor/facts-checker-gpt Perform facts checks on your conversations with LLMs to catch fake-news,...	14	Experimental	12	Python
15	Downcast-inamorata249/fact-checker Verify news, claims, images, and videos in any language with automated...	14	Experimental	—	—
16	dyodji/RealityCheck Fact Checker Bot for Reddit Posts and Comments	12	Experimental	3	Python
17	Arnavvats287/Fact-Checker-llm-App AI-powered fact-checking web app that extracts claims from PDFs and verifies...	11	Experimental	—	Python
18	IshangKansal/Fact-Checker-AI AI-powered fact-checking web app using LLMs and live web data	11	Experimental	—	Python
19	aaditkapoor/Citation-Needed Need Citation: A way to fact check medical/health related claims using GPT	10	Experimental	1	—