Apollo 2018 Data Breach
Data Broker · B2B contact and company data aggregation · Sales intelligence platform and lead data provider · USA
Apollo.io Sales Intelligence Platform Breach: 92M Professional Profiles Exposed
Sales intelligence and engagement platform.
Confirmed · ObscureIQ Intelligence
Breach Risk Index i
41/100
Lower riskHigher risk
Moderate: notable exposure with meaningful misuse potential.
Data Sensitivity i
StandardExposed data is largely lower-sensitivity. Standard identity-protection precautions are advised.
92.4MRecords
2018Year
The Breach Risk Index (BRI) is a proprietary 0–100 score rating how dangerous a breach is right now, based on how recently the data has been circulating on the dark web and how valuable it is to attackers.
Breach Summary
Apollo.io, a sales intelligence and engagement platform, left a database containing billions of data points publicly exposed without a password in July 2018. Security researcher Vinny Troia discovered the unsecured database and sent a subset of the data, containing nearly 126 million unique email addresses, to the breach notification service Have I Been Pwned. The exposure affected 92.4 million records in total and stemmed from a misconfiguration rather than an external attack. The exposed data included names, email addresses, phone numbers, employers, job titles, geographic locations, salutations, and social media profiles. Apollo confirmed that passwords, Social Security numbers, and financial data were not included. Even so, the exposed dataset is highly structured and detailed, making it well-suited for spearphishing, business email impersonation, and executive targeting. Many affected individuals never directly interacted with Apollo; their information was held as part of the platform's broader B2B contact database. No major regulatory action or litigation was publicly reported in connection with this breach. Apollo notified affected parties and maintained that the exposure was limited to non-sensitive professional data. For affected individuals, the practical risk remains: their professional profiles, contact details, and organizational affiliations are now part of a known, circulated dataset that can be used to craft highly convincing fraudulent communications.
Full threat analysis, exploitation vectors, and principal guidance below.
10 additional sections · verified field analysis · defensive doctrine
Querying breach corpus…
Cross-referencing exposed field types…
Resolving threat-actor attribution…
Compiling principal risk advisory…
92.4M records analyzed
About Apollo
Apollo.io is a sales-intelligence and engagement platform that combines business contact data, company records, prospecting tools, sequencing, and workflow automation for go-to-market teams. Its public positioning centers on giving sales and marketing users access to a very large B2B contact graph and the tooling to search, enrich, engage, and convert against it.
Why They Hold Your Data
Sales-intelligence platforms aggregate business contact records, company profiles, job titles, emails, phone numbers, and employer-linked identifiers across lead-generation and outbound-sales workflows.
Recent Developments
Apollo remains an active and growing GTM software company with a clear AI-first expansion strategy. Its 2025 product updates emphasized AI-generated summaries, mobile workflows, and expanded calling and extension features, and in March 2026 the company announced its acquisition of Pocus as part of a broader push to build an AI-native operating system for revenue teams.
Data Points Exposed
8 verified field types
Email Address
Employer
Full Name
Geographic location
Job Information
Phone Number
Salutation
Social Media Profile
Breach Impact
The 2018 Apollo breach exposed the concentrated risk of B2B sales-intelligence platforms by leaving a vast broker-style contact corpus publicly accessible without a password. HIBP says the exposed dataset contained 125.9 million unique email addresses and included names, employers, geographic locations, job titles, phone numbers, salutations, and social media profiles, making it highly useful for phishing, business email compromise pretexting, executive targeting, enrichment, and large-scale corporate identity mapping. Apollo publicly maintained that the exposed data did not include passwords, Social Security numbers, or financial data, but that did little to reduce the operational value of the dataset for targeted abuse.
Exploitation & Downstream Threats
• SIM swap attacks where phone numbers are present | • Targeted phishing campaigns using exposed email addresses | • Doxxing risk from physical address exposure | • Employment-based social engineering using job and employer data | • Social media account targeting and impersonation
Principal Risk Advisory
What this means for a principal
A data-broker/identity breach: aggregated identity attributes re-seed broker networks and enrich targeting of the individual. For a high-profile principal the main risk is credible impersonation and enrichment of existing exposure.
What You Should Do
- Guard against SIM-swap and vishing: add a carrier port-out PIN and verify any 'support' calls independently.
- Do not use unofficial 'am I affected' lookups; several are themselves harvesting operations.
How ObscureIQ Can Help
- Corpus confirmation: determine whether and where the principal (plus household and staff) appear in this dataset and which specific fields are exposed for them.
- Exposure mapping and footprint neutralization: cross-reference against broker-available data and suppress still-removable elements, prioritizing address and phone, since this record re-seeds broker networks.
- ThreatWatch tuned to this incident's identifiers and misuse pattern (impersonation and targeting patterns, not generic credential monitoring).
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