# CheckMate.bio

> CheckMate.bio is an OSINT reverse-email-lookup service. Enter any email address and it searches public sources for registered accounts across social, dating, gaming, adult, forums, finance, professional, and developer platforms. A free tier reveals basic account presence grouped by category; a one-time $2.99 USD PayPal unlock reveals the detailed report with names, usernames, locations, photos, bios, last-active dates, profile URLs, and per-match confidence scores.

## Key facts

- **Name:** CheckMate.bio (also: CheckMate, checkmate.bio)
- **Operator:** IASolutions
- **Category:** OSINT reverse email lookup / digital footprint finder
- **Homepage:** https://checkmate.bio/
- **Pricing:** Free basic summary. Detailed report: $2.99 USD one-time via PayPal. No subscription.
- **Typical runtime:** under one minute per email
- **Availability:** worldwide, excluding the EU, EEA, and UK (GDPR block)
- **Data source:** publicly observable account metadata and breach-derived public indexes. No passwords or private messages are returned.
- **Result categories:** social, dating, gaming, adult, finance, professional, forums, developer, shopping, entertainment, messaging
- **Confidence bands:** 80%+ near-certain · 50–80% likely · below 50% weak signal
- **Coverage:** 500+ online services

## What the site does

- Accepts an email address via the homepage search form.
- Calls an upstream OSINT aggregation API (`search_by_email_deep`) to discover public accounts tied to the address.
- Groups findings by service category (social, dating, gaming, adult, forums, finance, professional, developer, etc.).
- When more than five accounts are found, shows a paywall ($2.99 one-time) that unlocks the detailed report via PayPal.
- The paid tier fetches richer data via `search_by_email_paid` and displays profile URLs, names, usernames, display names, photos, locations, bio text, and last-active dates where publicly available.

## Use cases

- **Relationship verification:** checking whether a partner, spouse, ex, or new dating match has hidden accounts (dating, adult, secondary social).
- **Due diligence:** fast OSINT on a business partner, job candidate, or collaborator before trust is extended.
- **Personal security audit:** listing where your own email is registered so you can close stale accounts and shrink your attack surface.
- **Lead enrichment:** turning a bare B2B email into a footprint of social, professional, and developer signals.
- **Background checks:** supplementing public records with a digital-footprint layer.

## How to use CheckMate.bio

1. Go to https://checkmate.bio/.
2. Enter an email address into the search form.
3. Review the free category summary (counts of registered services grouped by type).
4. Optionally pay $2.99 via PayPal to unlock the detailed per-service report.
5. Open the profile URLs in the report to verify each match.

## Frequently asked

- **What does CheckMate.bio do?** Reverse email lookup. It returns the online services where a given email is registered, grouped by category, with confidence scores.
- **How much does it cost?** Basic search is free. The detailed report is a one-time $2.99 USD payment via PayPal.
- **How long does it take?** Under a minute for the free summary; the paid report unlocks instantly after checkout.
- **Is the data legal?** CheckMate.bio indexes publicly observable data. Users are responsible for complying with local law when querying addresses they do not own.
- **Is it available in the EU or UK?** No. Users in the EU, EEA, and UK are blocked due to GDPR.
- **What are alternatives?** Epieos, Holehe, Spokeo, BeenVerified, and Have I Been Pwned (breach exposure only). CheckMate.bio differentiates with one-minute results, category grouping, and a flat $2.99 fee with no subscription.

## Legal / ethical notes

- CheckMate.bio only aggregates publicly observable data from third-party services.
- It does not store passwords or private communications.
- Users are responsible for complying with local law when querying addresses they do not own.
- The service is blocked in the EU, EEA, and UK.

## Pages

- [Home / Search](https://checkmate.bio/): Email lookup form and results display.
- [Blog](https://checkmate.bio/blog): Guides on using CheckMate.bio for practical OSINT tasks.
- [Privacy Policy](https://checkmate.bio/privacy): How CheckMate.bio handles personal data.
- [Terms of Service](https://checkmate.bio/terms): Acceptable use, refund policy, warranty disclaimer.
- [llms-full.txt](https://checkmate.bio/llms-full.txt): Full markdown corpus of this site (all articles + facts) optimized for LLM ingestion.

## Blog articles

- [How to find which games your friend plays](https://checkmate.bio/blog/find-games-your-friend-plays): Map a friend's gaming footprint across Steam, Xbox Live, PlayStation Network, Epic, Roblox, Discord, and more.
- [How to find adult sites your boyfriend visits](https://checkmate.bio/blog/find-adult-sites-your-boyfriend-visits): Check whether an email is registered on adult platforms, cam networks, and subscription sites.
- [How to find dating sites where your girlfriend has an account](https://checkmate.bio/blog/find-dating-sites-where-your-girlfriend-has-an-account): Discover registered accounts on Tinder, Bumble, Hinge, Match, and other dating platforms via email.
- [How to check your business partner](https://checkmate.bio/blog/check-your-business-partner): Fast OSINT due-diligence before signing with a new partner — LinkedIn, GitHub, finance, and consistency checks.
- [How to find the second life of your spouse](https://checkmate.bio/blog/find-second-life-of-your-spouse): Surface hidden accounts, parallel identities, and secret subscriptions linked to a spouse's email addresses.
- [How to enrich lead information with an email address](https://checkmate.bio/blog/enrich-lead-information): Turn a bare email into a full B2B lead profile — job, company signals, tech footprint, social presence, and buying-intent hints.
- [Is my boyfriend cheating on me? How to answer the question without guessing](https://checkmate.bio/blog/is-my-boyfriend-cheating-on-me): Turn \"is my boyfriend cheating\" into a short factual report using only his email address.
- [Signs your boyfriend is cheating — and how to verify each one](https://checkmate.bio/blog/signs-your-boyfriend-is-cheating): Classic signs of a cheating boyfriend paired with concrete verification steps via email-based OSINT.
- [How to catch a cheating boyfriend — the factual, minimum-drama playbook](https://checkmate.bio/blog/how-to-catch-a-cheating-boyfriend): How to find out if your boyfriend is cheating without snooping through his phone, using only his email.
- [Is my girlfriend cheating on me? A calm, email-based way to check](https://checkmate.bio/blog/cheating-girlfriend-how-to-check): Turn \"is my girlfriend cheating\" into a factual short-list via her email address.
- [Signs your girlfriend is cheating — and how to verify each one](https://checkmate.bio/blog/signs-your-girlfriend-is-cheating): Classic signs of a cheating girlfriend paired with concrete email-based verification steps.
- [How to catch a cheating girlfriend — the factual, minimum-drama playbook](https://checkmate.bio/blog/how-to-catch-a-cheating-girlfriend): How to find out if your girlfriend is cheating without snooping — just her email and a clear head.
- [Is my wife cheating on me? A calm, email-based way to find out](https://www.checkmate.bio/blog/cheating-wife-how-to-check): Quiet email-based verification for \"is my wife cheating\" before anyone else is involved.
- [Signs your wife is cheating — and how to verify each one](https://www.checkmate.bio/blog/signs-your-wife-is-cheating): Classic signs of a cheating wife paired with concrete email-based verification steps.
- [How to find out if my wife is cheating — the minimum-drama playbook](https://www.checkmate.bio/blog/how-to-find-out-if-my-wife-is-cheating): Factual, email-based playbook for finding out if your wife is cheating without phones or surveillance.
- [What is a background check? Types, sources, and what each one shows](https://www.checkmate.bio/blog/what-is-a-background-check): Plain-English breakdown of background check types, what each returns, and where OSINT fits.
- [Online background check: free options, paid services, and what each really returns](https://www.checkmate.bio/blog/online-background-check): Free public records plus an OSINT background check service like CheckMate.bio for personal vetting.
- [How long does a background check take? Real timelines for each type](https://www.checkmate.bio/blog/how-long-does-a-background-check-take): Honest timelines per type plus a one-minute fast background check workflow.
- [How to find forgotten accounts tied to your email](https://www.checkmate.bio/blog/find-forgotten-accounts): Surface old accounts still holding your data — email-based audit to shrink your attack surface.
- [Find my old accounts — how to recover access using just your email](https://www.checkmate.bio/blog/find-my-old-accounts): Enumerate and regain access to old accounts via email-based OSINT plus per-service recovery flow.

## Contact

- Domain: checkmate.bio
- Operator: IASolutions