Use caseFor marketing teams
Check the facts in your launch copy before it goes live.
Lenz is a fact-checking service for marketing copy. It identifies the factual statements it can check against independent public sources — a market figure, a competitor’s price, a claim about what a product does — and returns a result for each, with the evidence on both sides.
Example: a launch paragraph“The global email marketing software market was valued at about $10 billion in 2024. Mailchimp, which Intuit acquired for about $12 billion in 2021, starts its Standard plan at $20 per month.”
FalseSoftware-specific estimates place the 2024 market near $1.4–$2.85 billion.
- Evidence on both sidesevery source named and dated
- Competitor and market claimschecked against public sources
- Citations checked toodoes the source say what the copy says
01Example
What comes back: the sources for and against.
| Claim | Verdict | Lenz Score | Sources |
|---|---|---|---|
| Intuit acquired Mailchimp for approximately $12 billion in 2021. | Truehigh confidence | 10/10 | sec.govinvestors.intuit.comintuit.com+12 more |
| Mailchimp's Standard plan starts at $20 per month. | Truehigh confidence | 9/10 | emailvendorselection.comblog.groupmail.ioretainful.com+9 more |
| The global email marketing software market was valued at approximately $10 billion in 2024.Suggested rewriteThe global email marketing software market was valued at roughly $1.4 billion to $2.9 billion around 2024. | Falsehigh confidence | 2/10 | mordorintelligence.comtechsciresearch.comemergenresearch.com+22 more |
Deep check · Checked 7 September 2026.
Open a row for the sources it used and the reasoning that weighed them.
A deep check includes the sources on both sides and the reasoning that weighed them. Read them against the statement before deciding whether to revise it.
02Competitors
Competitor and market claims.
“The market grew 12% last year.” “Competitor X charges $49.”
Lenz searches for public sources that support or contradict each and returns what it found, every source named and dated. When no public record settles a statement, Lenz answers “No Public Record” instead of a score. That doesn’t make the statement false. When the copy links its sources, Lenz checks those citations: whether each source says what the copy says it does, with the passage.
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Verify a competitor’s price or feature
Lenz searches public pricing pages and documentation for evidence of the stated price or feature. Check the source’s date and any plan, region or billing conditions before you quote it.
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Comparative advertising claims: first, only, fastest
A comparison against the market is checked against what the market has published. A “first” or an “only” usually does not settle: no search can show that nothing else exists, so that claim stays yours to substantiate.
03Where you work
Check it where you drafted it.
Check a landing page, ad copy or a sales deck inside Claude or Cursor.
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Submit the text from the window it was drafted in
Claude: one sign-in. Cursor and Claude Code: one command or one click, then sign in.
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Send the landing page, the deck or the ad copy whole
Lenz picks out the claims it can check, and each comes back with its own result.
04In your document
Check the copy in a Google Doc.
The global email marketing software market was valued at approximately $10 billion in 2024.The global email marketing software market was valued at roughly $1.4 billion to $2.9 billion around 2024.
Paste a link to a Google Doc shared with anyone who has the link into the Workbench on a desktop, or on lenz.io/verify. Lenz checks the copy as the document: each claim, and each source it links.
From the Workbench, download it as a Word file with a comment on what needs a look and suggested edits inline. Lenz does not write back to the Google Doc.
05Substantiation
Claim substantiation: what a public-source tool does not do.
Public-source checks can inform claim substantiation; they do not validate private test results, prove exclusivity, or replace legal review of an advertising claim.
Lenz checks claims in text against public sources. It does not judge whether a model wrote the copy.
Warranty
Vendors disclaim accuracy. Lenz warrants the verdict.
A verdict can qualify when a full verification returns True or False with high panel confidence and enough independent sources behind it. Its certificate is what your legal team keeps alongside the copy.
On a paid Pro or Scale plan, every full verification that qualifies carries a contractual warranty, at no extra charge.
06Pricing
Try free, no card.
$7.99/ month
500 quick checks or 50 deep checks a month, in any combination.
Or $6.59 a month, billed $79 a year
Choose Plus$99/ month
5,000 quick checks or 500 deep checks a month, in any combination. The warranty on qualifying verdicts.
Or $83 a month, billed $990 a year
Choose Pro$399/ month
20,000 quick checks or 2,000 deep checks a month, for production volumes. The warranty on qualifying verdicts.
Or $333 a month, billed $3,990 a year
Choose Scale07Questions
Yes, and it is where a public-source check is strongest: a price they publish, a figure they announced, a claim in their filings or in coverage of them. Lenz returns the sources on both sides. It checks what has been published about them, not what is true inside their company.
A competitor’s pricing page, regulatory filings, analyst reports, news articles; relevance depends on the statement. Independence means sources outside the model that wrote the copy and outside your own team, not that every source is neutral about its subject.
Yes. A deep check is a record you can download and share, with the sources on both sides and the reasoning that weighed them. When a verdict qualifies, that record includes a signed, timestamped certificate of what Lenz warranted, which your legal team can keep with the copy.
Two different checks. The quick check is a first read: a panel of models reads the claim and returns a verdict and a confidence level in about fifteen seconds. The deep check is an investigation: Lenz searches independent public sources and returns the verdict with those sources and the reasoning, in about a minute or two per claim. The deep check can change the quick verdict. When it does, rely on the deep check: it is the one that shows its sources and its reasoning.
Yes. Lenz wrote the launch paragraph, ran the checks and published them — every row links to its result. Your own copy is never used as an example, and what you send through the API or a connector stays private to your account.
Not answered here? Talk to us