Apollo
MEDIUM RISKData breach — July 2018
In July 2018, the sales engagement startup Apollo left a database containing billions of data points publicly exposed without a password. The data was discovered by security researcher Vinny Troia who subsequently sent a subset of the data containing 126 million unique email addresses to Have I Been Pwned. The data left exposed by Apollo was used in their "revenue acceleration platform" and included personal information such as names and email addresses as well as professional information including places of employment, the roles people hold and where they're located. Apollo stressed that the exposed data did not include sensitive information such as passwords, social security numbers or financial data. The Apollo website has a contact form for those looking to get in touch with the organisation.
search Check if you were affected — freeData exposed in this breach
What happened in the Apollo data breach?
In July 2018, the sales engagement startup Apollo left a database containing billions of data points publicly exposed without a password. The data was discovered by security researcher Vinny Troia who subsequently sent a subset of the data containing 126 million unique email addresses to Have I Been Pwned. The data left exposed by Apollo was used in their "revenue acceleration platform" and included personal information such as names and email addresses as well as professional information including places of employment, the roles people hold and where they're located. Apollo stressed that the exposed data did not include sensitive information such as passwords, social security numbers or financial data. The Apollo website has a contact form for those looking to get in touch with the organisation.
The exposed data included 8 types of personal information. Learn more about what a data breach means for you.
Quick answer — was Apollo hacked?
Yes. Apollo was breached in July 2018. The breach exposed 125,929,660 records including email addresses, employers, geographic locations. 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 Apollo breach so dangerous?
The Apollo breach exposed 125,929,660 records — that is 125.9M people whose personal data is now circulating on the dark web. The combination of email addresses, employers, geographic locations 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 Apollo breach?
Email addresses — used for phishing attacks and credential stuffing against your other accounts
Employers — may be combined with other breach data to build a profile for targeted attacks
Geographic locations — may be combined with other breach data to build a profile for targeted attacks
Job titles — may be combined with other breach data to build a profile for targeted attacks
Names — used to build profiles and target you with personalised scams
Phone numbers — enables SIM swapping attacks and targeted SMS phishing scams
Salutations — may be combined with other breach data to build a profile for targeted attacks
Social media profiles — may be combined with other breach data to build a profile for targeted attacks
Is the Apollo breach still dangerous in 2026?
Yes. Stolen data from the Apollo 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 Apollo 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 Apollo breach
Approximately 125,929,660 user records were exposed in the Apollo breach in July 2018.
Yes. Leaked credentials are actively used in credential stuffing attacks years after a breach. If you reused your Apollo 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 Apollo dataset and tell you instantly whether your email was exposed and what data was taken.
Change your Apollo 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 Apollo breach?
The Apollo data breach affected approximately 125,929,660 users who had accounts with the service. With 125.9M records exposed, this is one of the larger breaches tracked in our database of 970+ known breaches.
If you ever created an account with Apollo 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 Apollo breach
Change your Apollo password immediately
Go to Apollo 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 Apollo 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.
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