Atlas Quantum
MEDIUM RISKData breach — August 2018
In August 2018, the cryptocurrency investment platform Atlas Quantum suffered a data breach. The breach leaked the personal data of 261k investors on the platform including their names, phone numbers, email addresses and account balances.
search Check if you were affected — freeData exposed in this breach
What happened in the Atlas Quantum data breach?
In August 2018, the cryptocurrency investment platform Atlas Quantum suffered a data breach. The breach leaked the personal data of 261k investors on the platform including their names, phone numbers, email addresses and account balances.
The exposed data included 4 types of personal information. Learn more about what a data breach means for you.
Quick answer — was Atlas Quantum hacked?
Yes. Atlas Quantum was breached in August 2018. The breach exposed 261,463 records including account balances, email addresses, names. This breach has been independently verified. If your email was involved, your data may still be at risk today. Check if you were affected.
Why was the Atlas Quantum breach so dangerous?
The Atlas Quantum breach exposed 261,463 records — that is a large number of compromised accounts. The combination of account balances, email addresses, names makes this a medium-risk breach that should be addressed promptly.
Don't wait to find out — check if your email was exposed in this breach now.
What data was stolen in the Atlas Quantum breach?
Account balances — may be combined with other breach data to build a profile for targeted attacks
Email addresses — used for phishing attacks and credential stuffing against your other accounts
Names — used to build profiles and target you with personalised scams
Phone numbers — enables SIM swapping attacks and targeted SMS phishing scams
Is the Atlas Quantum breach still dangerous in 2026?
Yes. Stolen data from the Atlas Quantum breach remains dangerous years after the incident. Research shows that over 65% of stolen credentials from older breaches have never been changed by the account holders. Attackers routinely compile data from multiple breaches to build complete profiles, and credentials from 2018 are still actively used in credential stuffing attacks today.
Personal information like email addresses, phone numbers, and dates of birth never expire. Even if you changed your Atlas Quantum password, the other exposed data can be combined with information from other breaches to target you. Learn more about how long stolen data stays dangerous.
Frequently asked about the Atlas Quantum breach
Approximately 261,463 user records were exposed in the Atlas Quantum breach in August 2018.
Yes. Leaked credentials are actively used in credential stuffing attacks years after a breach. If you reused your Atlas Quantum password elsewhere and haven't changed it, those accounts remain at risk today.
Enter your email in the free checker on EmailLeaked. We scan 12 billion+ breach records including the full Atlas Quantum dataset and tell you instantly whether your email was exposed and what data was taken.
Change your Atlas Quantum password immediately, change any other account where you used the same password, enable two-factor authentication on all important accounts, and monitor for phishing emails over the next 90 days.
Who was affected by the Atlas Quantum breach?
The Atlas Quantum data breach affected approximately 261,463 users who had accounts with the service. While not the largest breach on record, it still represents a significant number of compromised accounts in our database of 970+ known breaches.
If you ever created an account with Atlas Quantum or used their services, your data may have been included in this breach. Check your email now to find out. You can also read our guide on what to do immediately after a data breach.
If your email was in the Atlas Quantum breach
Change your Atlas Quantum password immediately
Go to Atlas Quantum and change your password right now. Use a strong, unique password that you have never used anywhere else.
Change any account sharing that password
If you used the same password on other sites, change it on every one of them. Attackers test stolen credentials on hundreds of popular sites within hours.
Enable two-factor authentication
Turn on 2FA on Atlas Quantum and every important account. Even if your password is known, attackers cannot get in without the second factor.
Check your other accounts for this breach
Run a full email check to see every breach your email appears in — not just this one.
searchCheck all my breaches — freeOther major breaches
Was my email hacked?
Check if your email is compromised in seconds. Free, private, no signup. Scan 12 billion+ records across 970+ known breaches.
search Check my email now — it's freeNo signup required · Results in under 5 seconds · Your data is never stored