Weigh the evidence behind every claim.

Every document, in every profession, mixes facts, figures, statistics, indexes, quotes, interpretations and judgements. Velydian checks every claim against cited sources, sources it finds on the web, or your own files. It flags references that do not exist and goes beyond right or wrong: each claim gets a verdict on how far its source really supports it, with the quoted passage and reasoning behind it.

Check a document See how a verdict reads

Free trial, no card needed.

Cited or not. Every claim checked, and stronger sources found where the evidence is weak.
A record you can keep. Annotated document, audit trail and exports, in minutes.
Swiss and private. Data residency in Switzerland, processing in Switzerland and the EU, GDPR compliant.

Annual report summaryIllustration

Board summary

Revenue grew 12% in 2025. The operating margin was 17.2%, in line with the prior year. The new plant will pay for itself within three years.

Claim 1 · Needs RevisionClaim 2 · SupportedClaim 3 · Unverifiable

CLAIM 1 OF 3Needs Revision

“Revenue grew 12% in 2025.”

What the source says

“Reported sales increased by 8.4%. Organic growth, excluding currency and acquisitions, was 12%.”

Cited annual report, page 14

The 12% is organic growth. Reported revenue grew 8.4%.

Illustration of a results view. Example text and source, for illustration.

Legal briefIllustration

Brief, section 3

The employee signed the agreement on joining in 2021. The court held that non-compete clauses are unenforceable. Courts in other cantons have taken the same view.

Claim 1 · SupportedClaim 2 · Needs RevisionClaim 3 · Unverifiable

CLAIM 2 OF 3Needs Revision

“The court held that non-compete clauses are unenforceable.”

What the source says

“The restriction is unenforceable in so far as it extends beyond twelve months.”

Cited judgment, paragraph 41

The court limited its finding to restrictions longer than twelve months. The brief states it as a general rule.

Illustration of a results view. Example text and source, for illustration.

ManuscriptIllustration

Introduction

Smith et al. demonstrated that the intervention reduces anxiety. The trial enrolled 84 adults over twelve weeks. The effect is likely to hold for adolescents.

Claim 1 · Needs RevisionClaim 2 · SupportedClaim 3 · Unverifiable

CLAIM 1 OF 3Needs Revision

“Smith et al. demonstrated that the intervention reduces anxiety.”

What the source says

“These results suggest a possible association and warrant confirmation in larger samples.”

Cited paper, Discussion

The paper reports an exploratory association. The manuscript reports it as a demonstrated effect.

Illustration of a results view. Example text and source, for illustration.

Regulatory submissionIllustration

Submission, section 2

The guideline requires annual validation of all internal models. Validation is carried out by a team independent of model development. The supervisor has accepted this approach at peer institutions.

Claim 1 · Needs RevisionClaim 2 · SupportedClaim 3 · Unverifiable

CLAIM 1 OF 3Needs Revision

“The guideline requires annual validation of all internal models.”

What the source says

“Institutions should validate material internal models at least annually.”

Cited guideline, section 4.2

The source says “should” and covers material models only. The submission says “requires” and “all”.

Illustration of a results view. Example text and source, for illustration.

News articleIllustration

Article draft

A new report found that 60% of teenagers are addicted to their phones. The survey was carried out online in spring, with parental consent. Experts expect the figure to rise next year.

Claim 1 · Needs RevisionClaim 2 · SupportedClaim 3 · Unverifiable

CLAIM 1 OF 3Needs Revision

“A new report found that 60% of teenagers are addicted to their phones.”

What the source says

“60% of respondents said they spend too much time on their phones.”

Cited survey report, page 3

The survey measured how teenagers rate their own screen time. It does not measure addiction.

Illustration of a results view. Example text and source, for illustration.

AI chat answerIllustration

AI answer

The Great Barrier Reef covers about 344,400 square kilometres, roughly the size of Japan. It is made up of some 3,000 individual reef systems and more than 1,500 tropical islands. Most of its coral has recovered since the last bleaching event.

Claim 1 · SupportedClaim 2 · Needs RevisionClaim 3 · Unverifiable

CLAIM 2 OF 3Needs Revision

“Some 3,000 individual reef systems and more than 1,500 tropical islands.”

What the source says

“It comprises of 3,000 individual reef systems, 760 fringing reefs, 900 tropical islands and about 300 coral cays.”

Source 1 of 2 · wwf.org.au, Great Barrier Reef

The reef systems match. The source counts 900 tropical islands, not more than 1,500.

Illustration of a results view. The answer is an example; the quoted passage is from the public WWF-Australia page.

Client reportIllustration

Executive summary

The client operates 14 sites across Switzerland. The market is growing at 25% a year. Competitors are unlikely to respond on price.

Claim 1 · SupportedClaim 2 · Needs RevisionClaim 3 · Unverifiable

CLAIM 2 OF 3Needs Revision

“The market is growing at 25% a year.”

What the source says

“The market grew 25% in 2024. Growth is expected to slow to 9% a year by 2028.”

Cited market study, page 6

25% is one year's growth. The study expects growth to slow to 9% a year.

Illustration of a results view. Example text and source, for illustration.

Equity research noteIllustration

Investment case

The company has doubled its market share since 2022. Net cash stood at CHF 210 million at year end. Management is confident of further gains.

Claim 1 · Needs RevisionClaim 2 · SupportedClaim 3 · Unverifiable

CLAIM 1 OF 3Needs Revision

“The company has doubled its market share since 2022.”

What the source says

“Market share rose from 11% in 2022 to 17% in 2025.”

Cited industry report, table 3

Market share rose by about half, from 11% to 17%. It did not double.

Illustration of a results view. Example text and source, for illustration.

Employee handbookIllustration

Holidays

Swiss law gives every employee five weeks of paid holiday a year. Holiday requests go to your line manager. Most employers in the sector offer more.

Claim 1 · Needs RevisionClaim 2 · SupportedClaim 3 · Unverifiable

CLAIM 1 OF 3Needs Revision

“Swiss law gives every employee five weeks of paid holiday a year.”

What the source says

“The employer must grant the employee at least four weeks’ holiday in each year of service and five weeks’ holiday to employees under 20 years of age.”

Swiss Code of Obligations, Art. 329a para. 1

The legal minimum is four weeks. Five weeks applies only to employees under 20.

Illustration of a results view. The handbook text is an example; the quoted passage is from the Swiss Code of Obligations.

Claim summaryComing soon

Claim file, summary

The deductible is CHF 5,000, as set out in the policy schedule. The fire was reported to the insurer within 48 hours. The broker confirmed cover by phone.

Claim 1 · Needs RevisionClaim 2 · SupportedClaim 3 · Unverifiable

CLAIM 1 OF 3Needs Revision

“The deductible is CHF 5,000, as set out in the policy schedule.”

What the source says

“With effect from 1 January, the deductible is increased to CHF 10,000.”

Endorsement 2, in the same claim file

The schedule says CHF 5,000, but a later endorsement raised it to CHF 10,000. The endorsement prevails.

Illustration of a results view. Example text and source, for illustration. Insurance checks are coming soon.

Sustainability reportComing soon

Climate section

Our Scope 1 and 2 emissions have fallen by 30% since 2019. All sites now buy certified renewable electricity. We are on track for net zero by 2040.

Claim 1 · Needs RevisionClaim 2 · SupportedClaim 3 · Unverifiable

CLAIM 1 OF 3Needs Revision

“Our Scope 1 and 2 emissions have fallen by 30% since 2019.”

What the source says

Emissions table: baseline year 2020, 48,200 t CO2e; 2025, 37,600 t CO2e (−22%).

Report annex, emissions table

The report’s own table shows a 22% fall from a 2020 baseline, not 30% since 2019.

Illustration of a results view. Example text and source, for illustration. Sustainability checks are coming soon.

Pick your industry

The stakes

Unsupported claims were always expensive. AI makes more of them, faster.

53%

Environmental claims examined across the EU that were vague, misleading or unfounded. 40% had no supporting evidence at all.

European Commission (2020), study on environmental claims

€1.9bn

Cash on Wirecard's balance sheet that its auditor could not confirm in 2020. The company then said the balances most likely did not exist.

Wirecard AG statements, June 2020

€30bn+

What Volkswagen's false emissions claims had cost the company by 2019, in fines, settlements and refits.

Volkswagen provisions, reported by Ward's Auto (2019)

1 in 4

Quotations in medical journal articles that misstate what the cited source says. Half of those errors are major.

Jergas & Baethge (2015), PeerJ 3:e1364, meta-analysis of 28 studies

70%+

Researchers who have tried and failed to reproduce another scientist's experiments, in a survey of 1,576 scientists.

Baker (2016), Nature 533:452–454

10,000+

Research papers retracted in 2023, an all-time record. The retraction rate has more than trebled in a decade.

Van Noorden (2023), Nature 624:479–481

Misinformation and disinformation ranked the most severe global risk for the next two years by 1,490 experts.

World Economic Forum, Global Risks Report 2024

10×

More research papers with at least one fabricated reference in under three years: 1 in 2,828 in 2023, 1 in 277 by early 2026. Over 2 million papers analysed.

Topaz et al. (2026), The Lancet

Papers accepted at NeurIPS 2025, the leading AI research conference, that carried fabricated citations through peer review: at least 100 in total.

GPTZero audit of 4,841 accepted papers (Jan 2026)

45%

AI assistant answers about the news with at least one significant issue, judged by journalists from 22 public service media organisations.

EBU & BBC (2025), News Integrity in AI Assistants

11 of 18

References that could not be traced in a Norwegian municipality's report proposing school closures. One cited a book that does not exist. The plan was suspended.

Tromsø municipality, 2025, reported by NRK

AU$440K

Government report on which Deloitte Australia refunded the final payment after AI-invented citations and a fabricated court quote were found.

CFO Dive / Fortune (Oct 2025)

17–33%

Purpose-built legal AI research tools hallucinated 17–33% of the time in Stanford's preregistered evaluation.

Magesh et al. (2025), Journal of Empirical Legal Studies 22:216–242

1,846

Court decisions worldwide documenting AI-hallucinated content in filings, 717 involving lawyers, as of 5 August 2026.

Charlotin, AI Hallucination Cases Database

€35M

Maximum fine under the EU AI Act for prohibited practices, or 7% of worldwide annual turnover, whichever is higher.

Regulation (EU) 2024/1689, Article 99(3)

Not another fact checker

Not just right or wrong. Supported or not.

Velydian checks facts. It also weighs what a text does with them: the conclusions it draws and how strongly it states them. A sentence can be accurate and still claim more than its evidence allows.

One claim, three levels“Working from home increases productivity by 13%.”Needs RevisionSource: Bloom, Liang, Roberts & Ying (2015), Quarterly Journal of Economics 130(1):165–218

Level 1
Facts
Figures, dates, names and quotations, checked against what the source actually says.
Does the source say 900 islands or 1,500?

Velydian findsSupportedThe 13% is in the study.A citation check stops here: true.
Level 2
Interpretation
Whether a conclusion follows from the evidence: a correlation read as a cause, one sample stretched into a general rule, a scope quietly widened.
Did the study show it, or only suggest it?

Velydian findsStretchedCall-centre staff at one Chinese travel company, who volunteered. Not “working from home” in general.
Level 3
Judgement
Whether the claim is as strong as its evidence: certainty where the source hedges, one favourable study where others disagree, a weak source where a stronger one exists.
Is this the whole picture, stated with the right confidence?

Velydian findsOverstatedOne study, stated as a rule for everyone.Verdict: Needs Revision. The figure is real; the claim reaches further than its evidence.

Works today

Three ways to check claims.

A text that cites its sources

Upload a PDF or Word file, or paste text. Velydian finds each claim, opens the source it cites and checks whether the source really says it.

A text with no sources

Velydian searches official websites, research papers and the wider web for each claim, keeps the strongest sources and checks the claim against them.

Against your own files

Attach your own documents and have every statement checked against them. You see the price before it starts.

Chrome extension · Coming to the Chrome Web Store

Check an AI answer or a social post in one click

A Velydian button on the AI page sends the answer and the sources it cited to Velydian together, and each claim is checked against what its source really says. An answer that cites nothing still works: Velydian finds the claims and looks for the evidence itself.

On LinkedIn and X, a slim Velydian banner sits on the right of the page: select a sentence in a post and click it. On any other site, including Facebook and Reddit, select text, right-click and choose “Verify with Velydian”. Results open in Velydian, in their own tab.

AI answers

ChatGPTClaudeGeminiPerplexityGoogle AI ModeNotebookLM

Social posts

LinkedInX

Three layers of checking

Surface tools check that a source exists. Velydian reads it.

Layer 1

Distortions and inaccuracies

Claims that overstate, misrepresent or twist what the source says.

A precedent cited for a rule the court never adopted.

Layer 2

Bias and fabrication

Selective citation, cherry-picked data, invented references and what was left out.

The favourable data is cited; the adverse findings in the same source are not.

Layer 3

Stronger sources

When the evidence is weak or missing, Velydian looks for a more authoritative source.

A blog summary of a rule is flagged, with the regulator's own text offered instead.

One verdict per claim

Four verdicts, each with its evidence.

Supported

The sources checked back the claim as written.

Needs Revision

Close, but a figure, a qualifier or the scope does not match the source.

Not Supported

The sources checked do not back the claim, or say something different.

Unverifiable

No source could be read or found that settles it either way.

Open any verdict to inspect the evidence and the reasoning behind it. Edit a claim or swap a source and it is checked again. Velydian weighs the evidence; you decide what to change.

Drop anything inPDF, DOCX, TXT, MD or pasted text, or an AI answer.
Every claim is checkedAgainst the cited source and independent evidence.
Review and strengthenEdit a claim or swap a source; it re-checks.
Take the reportAnnotated document, audit trail, executive summary, CSV/JSON exports.

How we test it

It does not wave a wrong figure through.

Our latest tests are on company reports, where a wrong figure costs most. When the evidence is not clear, Velydian sends the claim back to you instead of approving it.

Reports it had never seen0 of 48wrong figures approved, across 8 Swiss company reports. 44 of 48 correct figures were confirmed; the other 4 were sent back for a person to check.Our test · 96 claims · Oct 2026

A test we did not write0 of 86flawed claims approved on FinDVer, a public benchmark of claims about financial reports built by university researchers.Public benchmark · Sep 2026

Every verdict, open to inspectionSource + reasonEach verdict shows the passage it rests on and why, so you can check Velydian itself.In every report

Small tests, dated, on financial reports. Results for other professions will be added here with their date. The best test is your own: run a document where you already know the mistakes, and see whether Velydian finds them. Your first check is free.

Who it is for

When your reputation depends on accuracy.

Legal professionals →Misquoted precedents, stretched holdings, fabricated case references. Compliance teams →Submissions checked against the text that sets each obligation. Researchers and editors →Hallucinated sources; "suggested" turned into "proved". Accounting and finance →Figures in reports and board packs traced to the statements. Investment research →Every number in the investment case tied to its filing. Consulting and due diligence →Every source in a deliverable read before a partner signs. Journalists and editors →Statistics and quotes traced to where they came from. HR and people teams →Policies and handbooks checked against the law they cite. Anyone using AI answers →Every sentence of an AI answer checked against its sources. Insurance Coming soon →A claim file read in the order its documents prevail. Sustainability reporting Coming soon →Each figure tied to the data behind it.

A Swiss company

Data in Switzerland. Processing in Switzerland and the EU.

Data residency in Switzerland, processing in Switzerland and the EUGDPR and Swiss data protection terms are covered by our Data Processing Agreement (v1.0).
A Swiss companyVelydian is built by MindtheGap Sàrl in Geneva.

Pricing

You see the price before you start.

One credit balance across our products. Credits never expire. The exact price is shown before you commit.

Available now

Pay as you go

0.03CHF per credit

Top up from CHF 20
Free trial credits for a company or institution address, no card needed

Get started

Available now · 500 spots

Founder Circle

500CHF once

50,000 credits included
CHF 0.01 per credit, locked forever
Unlimited seats, API access, priority support
30-day money-back: full refund minus credits used

Claim a Founder spot

What a credit buys: checking a claim costs 5 credits and reading a source costs 1. Example: 30 cited claims drawn from 10 sources cost 30 × 5 + 10 × 1 = 160 credits, CHF 1.60 at the Founder rate or CHF 4.80 pay as you go. Deeper source audits cost more.

Questions

Before your first check.

What exactly does Velydian check?

Every claim in your text. A claim with a citation is checked against the cited source. A claim without one is checked against the strongest sources Velydian finds. Each claim gets a verdict with the quoted evidence behind it.

Does it work with answers from AI chats?

Yes. Paste or upload an answer from ChatGPT, Claude, Gemini, Perplexity, NotebookLM or Google AI Mode today. The Chrome extension sends the answer and its sources to Velydian in one click; it is coming to the Chrome Web Store.

What happens to my document?

When you run a check, your document’s text is sent over an encrypted connection to our servers and AI services in Switzerland and the EU. To find evidence, short search queries built from your claims are sent to web and scholarly search services. Your document’s content and results are deleted automatically about 24 hours after your check; source links and summary data are kept.

Can I rely on Velydian as my only check?

Velydian supports human review. It shows the evidence behind every verdict so you can decide. In high-stakes work, expert judgment stays essential.

Check your next text before someone else does.

Check a document Join the Founder Circle

Weigh the evidence behind every claim.

Unsupported claims were always expensive. AI makes more of them, faster.

Not just right or wrong. Supported or not.

Facts

Interpretation

Judgement

Three ways to check claims.

A text that cites its sources

A text with no sources

Against your own files

Check an AI answer or a social post in one click

Surface tools check that a source exists. Velydian reads it.

Distortions and inaccuracies

Bias and fabrication

Stronger sources

Four verdicts, each with its evidence.

It does not wave a wrong figure through.

When your reputation depends on accuracy.

Data in Switzerland. Processing in Switzerland and the EU.

You see the price before you start.

Pay as you go

Founder Circle

Before your first check.

Check your next text before someone else does.