Data breaches → Mate1.com
Was your data in the Mate1.com breach?
2016 · mate1.com · ~27,393,015 accounts exposedCritical severity · 10/10
Mate1.com (mate1.com) suffered a data breach in 2016 that exposed around 27,393,015 accounts. If you had an account, some of your personal data may be circulating in leaked databases. The fastest way to know is to check your own email — free, in about 30 seconds, no password required.
What happened
In February 2016, the dating site mate1.com suffered a huge data breach resulting in the disclosure of over 27 million subscribers' information. The data included deeply personal information about their private lives including drug and alcohol habits, incomes levels and sexual fetishes as well as passwords stored in plain text.
Breach details sourced from Have I Been Pwned, the industry-standard breach database. Risk analysis by Nullivo.
What was exposed, and why it matters
Not all breaches carry the same risk — what matters is which fields leaked. Here is what the Mate1.com breach exposed and what each item actually enables:
Attackers replay leaked passwords across other sites (“credential stuffing”). Because most people reuse passwords, one leak often unlocks email, shopping and banking accounts elsewhere.
Special-category data under UK/EU GDPR. Exposure can lead to discrimination, extortion or targeted harassment, and cannot be undone.
Date of birth is a permanent identifier used to verify identity by phone. Combined with a name and address it is often enough to impersonate you.
Reveals where you live, work or travel, which supports both targeted scams and physical-safety risks.
Links this leak to your other accounts — a reused username lets anyone build a profile of you across platforms.
Puts you on spam and phishing lists, and confirms to attackers that you hold an account with this service — which makes impersonation emails more believable.
Also listed in this breach: Astrological signs, Dates of birth, Drinking habits, Drug habits, Education levels, Email addresses, Ethnicities, Fitness levels, Genders, Geographic locations, Income levels, Job titles, Names, Parenting plans, Passwords, Personal descriptions, Physical attributes, Political views, Relationship statuses, Religions, Sexual fetishes, Travel habits, Usernames, Website activity, Work habits.
What to do if you were affected
These steps are ordered for this specific breach — the most urgent action given what leaked comes first.
- Passwords: Change this password everywhere you have reused it, starting with your email account — whoever controls your email can reset everything else.
- Sensitive personal characteristics: Under UK/EU GDPR you have a strong right to erasure here — exercise it with the service and with any site republishing the data.
- Dates of birth: Never confirm your date of birth to an inbound caller — hang up and dial the organisation back on a published number.
- Location data: Review location sharing on the accounts you still hold with this service.
- Names and usernames: Search your usual username to see what else it exposes, and use distinct handles for sensitive accounts.
- Check whether your own email appears in this breach — run a free scan to confirm before you spend time on the steps above.
This breach put your details on data-broker sites
Because Mate1.com exposed sensitive personal characteristics, this is one of the breaches that feeds people-search and data-broker sites. Those sites scrape leaked databases, combine them with public records, and republish the result as a searchable profile — which is how a single breach turns into a permanent public listing. Removal works, but brokers typically re-list within about four months, so it has to be repeated.
See our broker-by-broker removal guides →
How urgent is this now?
This breach is over 10 years old. Old credentials still cause harm — leaked passwords from a decade ago are still tried against new accounts every day.
Passwords are the reason breach age matters less than people expect. Leaked credentials are compiled into wordlists that get tried against new services for years afterwards, so a password exposed here is unsafe to use anywhere, ever again.
Remember: a breach can't be "un-leaked" — once a database is out, it exists in countless copies. The goal is to make the leaked data useless: change what can be changed, lock down what can't, and remove what has been republished.
Frequently asked questions
What data was exposed in the Mate1.com breach?
The Mate1.com breach exposed passwords, sensitive personal characteristics, dates of birth, location data, names and usernames, email addresses. Attackers replay leaked passwords across other sites (“credential stuffing”). Because most people reuse passwords, one leak often unlocks email, shopping and banking accounts elsewhere.
How many people were affected by the Mate1.com breach?
Around 27,393,015 accounts were exposed, making it a very large breach by any measure.
What should I do if I had a Mate1.com account?
Change this password everywhere you have reused it, starting with your email account — whoever controls your email can reset everything else. You can check whether your own email appears in this breach with a free Nullivo scan — no password required.
Breaches that exposed similar data
If the Mate1.com breach affected you, these breaches exposed comparable information — worth checking too, since leaked datasets are routinely combined.
- Was your data in the Beautiful People breach? (2015, ~1,100,089 accounts)
- Was your data in the Zoosk (2020) breach? (2020, ~23,927,853 accounts)
- Was your data in the MeetMindful breach? (2020, ~1,422,717 accounts)
- Was your data in the CyberServe breach? (2021, ~1,107,034 accounts)
- Was your data in the WhiteDate breach? (2025, ~20,363 accounts)
- Was your data in the Ashley Madison breach? (2015, ~30,811,934 accounts)