Avancer Document Fact-Checker vs Eustace
Avancer Document Fact-Checker
avancer.ai
Eustace
eustace.appSide by side
| Figure | Avancer Document Fact-Checker | Eustace |
|---|---|---|
| Price from | $12.99/mo | $15/mo |
| Free plan | Yes | Yes |
| Free trial | Yes | — |
| Open source | — | — |
| Web | Yes | Yes |
| API | Yes | — |
| Self-hosted | Yes | — |
| Plans published | 4 | 3 |
| Spec score · AI Fact-Checking Tools | 8.5 (#4) | 8.2 (#6) |
| Intended users | The Text Check page describes use by newsrooms, universities, political and public-sector teams, legal and compliance teams, financial firms, and medical or scientific communicators. | The site describes Free as covering casual fact-checks and Pro as being for working writers and researchers. |
| Purpose | It extracts factual claims from documents and checks them against live web sources, returning claim-level verdicts, evidence, and confidence scores. | Eustace is a fact-checking workspace for writers and researchers who work with AI; it extracts factual claims from drafts and checks approved claims against independent evidence. |
| Security | The document page says files are processed solely for the scan and deleted after analysis, and documents are not used to train models or shared. | The privacy policy says data is encrypted in transit with TLS and at rest by infrastructure providers, production data access is restricted, and database rows are isolated per account. |
| Support | The Basic plan includes email support; the Custom plan includes dedicated support and an SLA. | The site directs questions and requests to [email protected]. |
Plans
Avancer Document Fact-Checker
- FreeFree
- Basic$12.99 a month
- Pro$67.99 a month
- CustomPriced on request
In their own words
Avancer Document Fact-Checker
Avancer Document Fact-Checker extracts factual claims from PDF documents and checks them against live web sources. Each claim receives a verified, unverified, or source-not-found verdict, along with evidence and a confidence score. The service checks for factual errors, fabricated citations, and misinformation, and estimates how much of a document was written by AI. Its page estimates about 20 seconds of scanning per 1,000 words. Documents can be checked through the web service, self-hosted options, or an API that accepts a document URL or raw text and returns claim-level results with evidence and sources. Claim extraction and verification are listed for more than 70 languages. Files are processed for the scan and deleted afterward; documents are not used to train models or shared. A free plan includes one scan. Basic costs $12.99 per month and includes 1,299 monthly credits, text scanning, API and webhook access, email support, and PDF report export. A seven-day trial is listed. The maker also lists SOC 2 Type II and GDPR compliance, with ISO 27001 in progress.
Eustace
Eustace is a web-based fact-checking workspace for writers and researchers working with AI-assisted drafts. Users can paste text or import a URL, PDF, or Word file; scanned PDFs are processed with OCR. The service extracts candidate factual claims and displays their original quotes so users can select which to verify. Approved claims are checked against fresh web sources rather than the submitted document. Its ledger uses ten verdicts and three confidence levels, and the product says it signals uncertainty when evidence is thin or mixed. Users can inspect sources, attach private evidence, override a verdict with the change recorded, and export a Markdown report with claims, verdicts, confidence, and citations. Eustace says it does not sell user data or use documents to train AI models. The Free plan provides 25 lifetime verifications; Pro costs $19/month for 500 each month, with optional $0.05-per-claim overage turned off by default. Automated verdicts, confidence labels, and summaries can be wrong, incomplete, or out of date, so they are intended to support rather than replace editorial judgment.