The short version
FounderCheck starts from what is being said about a person. Its own homepage leads with "Scam or legit? We check founders against the public record," and its methodology page describes collecting "what is actually being said and asked about a person: scam accusations, collapse stories, 'was he charged' questions, net-worth talk," then testing those against court, regulator and registry records.
MentionFox Source Check starts from what the person said to you. It splits a pitch, a bio or an email into separately testable claims, sends each to the public register that settles that kind of claim, and returns one verdict per claim with the exact search printed underneath it.
Those are different jobs. Investigating an allegation and verifying a pitch are both real needs, and neither tool is the wrong answer to the other's question.
Where we agree with them
FounderCheck's published methodology gets several things right that most background tools do not, and it would be dishonest to compare without saying so.
They grade per claim rather than issuing a single score. They rank primary records above commentary — their page states that "aggregators and risk-score sites are treated as leads to chase down, never as the basis for a verdict," which is exactly right. They carry a "True, with context" verdict for claims that are accurate but misleading without a key fact, and a "Confirmed clean" verdict for adverse claims they checked and did not substantiate — that second one is a genuinely useful thing to be able to say. And they explicitly account for a founder's name staying attached to a business through changes of ownership, which is a real and frequently-botched source of unfair findings.
Where the two actually differ
| MentionFox Source Check | FounderCheck | |
|---|---|---|
| Starting question | "Which of the claims this person made are supported by the register that settles them?" | "Scam or legit?" — the questions being asked about a person, tested against the record (per their homepage) |
| Input | A pitch, bio, email, link or name-and-role, split into claims automatically | A founder's name |
| Verdict vocabulary | Verified · Partially verified · Could not verify · Contradicted by the record | Verified · True, with context · Not supported · Confirmed clean · Disputed (per their methodology page) |
| The exact search, published | Yes — every verdict prints the search performed and a link that reruns it | Not stated on their public pages; they describe ranking sources, and link to a "how we check" explanation |
| What was not checked | Listed explicitly, register by register, with the reason and a manual link | Not described on their public pages |
| When a register returns nothing | "Could not verify", stated as an unsettled question and never as an accusation | "Not supported" — the record does not back the claim (per their methodology page) |
| Identity ceiling | Stated outright: no public register maps a person to an entry, so a name-and-role claim tops out at partially verified | Not described on their public pages |
| Adverse-claim research | Not the primary shape — litigation and enforcement are checked as claims, not as a story to investigate | The core of the product |
| Also part of | A wider vetting suite — investor, hire, firm and journalist checks on the same evidence engine | Founder checks |
The two differences that matter most
1. A tool that never asserts a person is fake
When a register does not list someone, there are several ordinary explanations before dishonesty: the register is not a complete list of everyone in that field, the person is recorded under a different spelling or a former name, the role is at a private company no register covers, or the search was blocked on the day.
Source Check therefore separates "the record settles this against the claim" from "the record does not settle this at all". The first is contradicted by the record and is rare and serious. The second is could not verify, and it is explicitly not an accusation — the search is printed so you can repeat it and decide for yourself. Collapsing those two into one negative is how verification tools damage people who have done nothing wrong.
2. Every verdict carries the search that produced it
A verdict you cannot reproduce is an opinion with a badge on it. Source Check names the register, prints the exact query, and links to a page where you run it again in under a minute. That matters most when you are going to act on the result: an investment committee, a hiring panel or an editor can check the working rather than trusting the badge.
It also produces the less flattering half — a list of every register that was not queried and why. An unchecked register is not a clean result, and a report that hides its gaps is more dangerous than one that admits them.
What this page claims about FounderCheck, and where it comes from
- "Scam or legit? We check founders against the public record" — headline on foundercheck.online.
- "Is This Founder Legit? Verified Answers" — page title, same source.
- Claims collected from "what is actually being said and asked about a person: scam accusations, collapse stories, 'was he charged' questions, net-worth talk" — their how-we-check page.
- Verdicts "Verified", "True, with context", "Not supported", "Confirmed clean", "Disputed", with the definitions quoted above — same source.
- Sources ranked as "court judgments, regulator actions, insolvency and administration filings, company registries, and dated reporting from named outlets", with "aggregators and risk-score sites … treated as leads to chase down, never as the basis for a verdict" — same source.
- Accounting for a founder's name staying attached to a business through changes of ownership — same source.
- Where this page says something is "not described on their public pages", that means exactly that: we did not find it stated, not that the product does not do it.
Checked 6 August 2026. Products change — if something here is out of date or wrong, tell us and we will correct it.
Which one fits your situation
- You have a deck and a bio and need to know what stands up. That is claim-level verification of stated claims — Source Check's shape.
- You have heard a specific allegation and want to know how it resolved. That is adverse-claim research — FounderCheck's shape.
- You are running real diligence on a real cheque. Do both, and do not treat either as the end of the work. Registers settle facts; they do not settle judgement.
Try claim-level verification on a real pitch
Paste a name and role, an email, a pitch or a link. You get a verdict per claim, the register that settled each one, the exact search, and an honest list of what could not be checked.
Run the check →
See pricing for what a run costs.
Common questions
What is the difference between MentionFox and FounderCheck?
Both check founders against public records and both grade claim by claim. FounderCheck starts from the questions being asked about a person; Source Check starts from the claims the person made to you. Source Check also publishes the exact search behind every verdict and a list of what it did not check.
Are there FounderCheck alternatives?
MentionFox Source Check is the closest one for claim-level verification. It verifies stated claims rather than adjudicating accusations, never asserts that a person is fake, and prints a reproducible search for every verdict.
Which tool should I use before investing?
If you are testing a pitch, verify the stated claims. If you are chasing a specific allegation, use adverse-claim research. Serious diligence usually does both.