ZenLedger
Company Details
Linkedin ID:
zenledger-io
Website:
Employees number:
20
Number of followers:
2,597
NAICS:
52
Industry Type:
Homepage:
zenledger.io
IP Addresses:
0
Company ID:
ZEN_2994856
Scan Status:
In-progress
ZenLedger Company CyberSecurity Posture
zenledger.io
ZenLedger is the leading software focused on cryptocurrency tax management and accounting. ZenLedger’s platform helps both crypto investors and tax professionals with tax filings and financial analysis by providing a digital workflow to simplify, optimize, and automate the tax and accounting process. Founded in 2017, and built by industry veterans in technology, finance, and accounting, ZenLedger helps investors stay compliant by aggregating user transaction information across thousands of exchanges, wallets, and tokens into one simple dashboard. ZenLedger makes it easy to calculate tax liability and make financial decisions by offering direct integration support for over 400+ exchanges, 40+ blockchains, 20+ DeFi protocols, and all wallets. The company has grown customer and revenue 500% YoY and has now exceeded $5 billion in cryptocurrency transactions processed. Drop us a line at [email protected].
ZenLedger A.I CyberSecurity Scoring
ZenLedger Risk Score (AI oriented)Between 650 and 699
ZenLedger
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ZenLedger Global Score (TPRM)XXXX
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ZenLedger Company CyberSecurity News & History
Past Incidents
1
Attack Types
1
Waltio and Ledger: French Police Probe Waltio Data Breach as France Warns of Crypto Kidnappings
Breach
Rankiteo Explanation
Attack with significant impact with customers data leaks
Description: French Crypto Tax Platform Waltio Investigated After Data Breach Exposes 5,000 Users On December 24, 2025, dark web intelligence firm Brinztech identified a database containing the personal data of approximately 5,000 French cryptocurrency holders listed for sale. The exposed information, linked to crypto tax platform Waltio, reportedly included emails and summary details from 2024 tax reports but no passwords, wallet addresses, or banking data were compromised. French authorities launched an investigation following the breach, with the Paris Prosecutor’s cybercrime unit assigning the case to France’s National Cyber Unit. The probe aims to determine the full scope of the stolen data and identify affected users. Waltio confirmed the incident in a January 23, 2026, security notice, acknowledging an extortion attempt received two days prior. The company filed a criminal complaint for unauthorized system access and attempted extortion, describing the attack as "particularly sophisticated." The breach has raised concerns beyond digital security. French authorities issued warnings about criminals impersonating law enforcement to target victims, emphasizing that police will never request confidential data by phone or appear unannounced at residences. The alert follows a surge in physical attacks on crypto holders, including a January 14 kidnapping of a retired couple in Sallanches and a foiled abduction attempt in Paris on January 23. Waltio maintains that the exposed data was limited to emails and tax report summaries, though Brinztech’s initial report suggested the dark web listing included names and phone numbers information Waltio claims it does not collect. The discrepancy remains unresolved, and it is unclear whether the December dark web listing is directly tied to the January extortion attempt. Waltio has notified France’s data protection authority (CNIL) and advised users to verify security codes in official communications. The incident underscores the risks faced by crypto tax platforms, which handle sensitive transaction data under international reporting requirements. It also follows a separate January 2026 breach at French hardware wallet maker Ledger, highlighting growing cybersecurity threats in the sector. Investigations into the Waltio breach are ongoing.
ZenLedger Company Scoring based on AI Models
Cyber Incidents Likelihood 3 - 6 - 9 months
A.I Risk Score Likelihood 3 - 6 - 9 months
Underwriter Stats for ZenLedger
Incidents vs Financial Services Industry Average (This Year)
No incidents recorded for ZenLedger in 2026.
Incidents vs All-Companies Average (This Year)
No incidents recorded for ZenLedger in 2026.
Incident Types ZenLedger vs Financial Services Industry Avg (This Year)
No incidents recorded for ZenLedger in 2026.
Incident History — ZenLedger (X = Date, Y = Severity)
ZenLedger cyber incidents detection timeline including parent company and subsidiaries
ZenLedger Company Subsidiaries
ZenLedger is the leading software focused on cryptocurrency tax management and accounting. ZenLedger’s platform helps both crypto investors and tax professionals with tax filings and financial analysis by providing a digital workflow to simplify, optimize, and automate the tax and accounting process. Founded in 2017, and built by industry veterans in technology, finance, and accounting, ZenLedger helps investors stay compliant by aggregating user transaction information across thousands of exchanges, wallets, and tokens into one simple dashboard. ZenLedger makes it easy to calculate tax liability and make financial decisions by offering direct integration support for over 400+ exchanges, 40+ blockchains, 20+ DeFi protocols, and all wallets. The company has grown customer and revenue 500% YoY and has now exceeded $5 billion in cryptocurrency transactions processed. Drop us a line at [email protected].
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ZenLedger CyberSecurity News
March 07, 2023 08:00 AM
How to Protect Yourself from Cyber Attacks During Tax Season?
Not many sane persons in the US will go against the (Internal Revenue Service) IRS. Even some crazies like Batman's supervillain Joker will...
Frequently Asked Questions
Explore insights on cybersecurity incidents, risk posture, and Rankiteo's assessments.
ZenLedger CyberSecurity History Information
Official Website of ZenLedger
The official website of ZenLedger is https://www.zenledger.io.
ZenLedger’s AI-Generated Cybersecurity Score
According to Rankiteo, ZenLedger’s AI-generated cybersecurity score is 688, reflecting their Weak security posture.
How many security badges does ZenLedger’ have ?
According to Rankiteo, ZenLedger currently holds 0 security badges, indicating that no recognized compliance certifications are currently verified for the organization.
Has ZenLedger been affected by any supply chain cyber incidents ?
According to Rankiteo, ZenLedger has not been affected by any supply chain cyber incidents, and no incident IDs are currently listed for the organization.
Does ZenLedger have SOC 2 Type 1 certification ?
According to Rankiteo, ZenLedger is not certified under SOC 2 Type 1.
Does ZenLedger have SOC 2 Type 2 certification ?
According to Rankiteo, ZenLedger does not hold a SOC 2 Type 2 certification.
Does ZenLedger comply with GDPR ?
According to Rankiteo, ZenLedger is not listed as GDPR compliant.
Does ZenLedger have PCI DSS certification ?
According to Rankiteo, ZenLedger does not currently maintain PCI DSS compliance.
Does ZenLedger comply with HIPAA ?
According to Rankiteo, ZenLedger is not compliant with HIPAA regulations.
Does ZenLedger have ISO 27001 certification ?
According to Rankiteo,ZenLedger is not certified under ISO 27001, indicating the absence of a formally recognized information security management framework.
Industry Classification of ZenLedger
ZenLedger operates primarily in the Financial Services industry.
Number of Employees at ZenLedger
ZenLedger employs approximately 20 people worldwide.
Subsidiaries Owned by ZenLedger
ZenLedger presently has no subsidiaries across any sectors.
ZenLedger’s LinkedIn Followers
ZenLedger’s official LinkedIn profile has approximately 2,597 followers.
NAICS Classification of ZenLedger
ZenLedger is classified under the NAICS code 52, which corresponds to Finance and Insurance.
ZenLedger’s Presence on Crunchbase
Yes, ZenLedger has an official profile on Crunchbase, which can be accessed here: https://www.crunchbase.com/organization/zenledger.
ZenLedger’s Presence on LinkedIn
Yes, ZenLedger maintains an official LinkedIn profile, which is actively utilized for branding and talent engagement, which can be accessed here: https://www.linkedin.com/company/zenledger-io.
Cybersecurity Incidents Involving ZenLedger
As of January 25, 2026, Rankiteo reports that ZenLedger has experienced 1 cybersecurity incidents.
Number of Peer and Competitor Companies
ZenLedger has an estimated 30,840 peer or competitor companies worldwide.
What types of cybersecurity incidents have occurred at ZenLedger ?
Incident Types: The types of cybersecurity incidents that have occurred include Breach.
How does ZenLedger detect and respond to cybersecurity incidents ?
Detection and Response: The company detects and responds to cybersecurity incidents through an incident response plan activated with yes, and law enforcement notified with yes (paris prosecutor’s cybercrime unit, france’s national cyber unit), and communication strategy with security notice issued to users, cnil notified, warnings about impersonation scams..
Incident Details
Can you provide details on each incident ?
Title: French Crypto Tax Platform Waltio Data Breach Exposes 5,000 Users
Description: On December 24, 2025, dark web intelligence firm Brinztech identified a database containing the personal data of approximately 5,000 French cryptocurrency holders listed for sale. The exposed information, linked to crypto tax platform Waltio, included emails and summary details from 2024 tax reports but no passwords, wallet addresses, or banking data. French authorities launched an investigation, and Waltio confirmed the incident in a January 23, 2026, security notice, acknowledging an extortion attempt received two days prior.
Date Detected: 2025-12-24
Date Publicly Disclosed: 2026-01-23
Type: Data Breach
Motivation: Extortion
What are the most common types of attacks the company has faced ?
Common Attack Types: The most common types of attacks the company has faced is Breach.
Impact of the Incidents
What was the impact of each incident ?
Incident : Data Breach WALZEN1769189829
Data Compromised: Emails, tax report summaries (potentially names and phone numbers)
Brand Reputation Impact: High
Legal Liabilities: Potential regulatory fines (CNIL)
Identity Theft Risk: Moderate (due to exposed personal data)
Payment Information Risk: None (no banking data compromised)
What types of data are most commonly compromised in incidents ?
Commonly Compromised Data Types: The types of data most commonly compromised in incidents are Personal data (emails, tax report summaries and potentially names and phone numbers).
Which entities were affected by each incident ?
Incident : Data Breach WALZEN1769189829
Entity Name: Waltio
Entity Type: Crypto Tax Platform
Industry: Financial Services (Cryptocurrency)
Location: France
Customers Affected: 5000
Response to the Incidents
What measures were taken in response to each incident ?
Incident : Data Breach WALZEN1769189829
Incident Response Plan Activated: Yes
Law Enforcement Notified: Yes (Paris Prosecutor’s cybercrime unit, France’s National Cyber Unit)
Communication Strategy: Security notice issued to users, CNIL notified, warnings about impersonation scams
What is the company's incident response plan?
Incident Response Plan: The company's incident response plan is described as Yes.
Data Breach Information
What type of data was compromised in each breach ?
Incident : Data Breach WALZEN1769189829
Type of Data Compromised: Personal data (emails, tax report summaries, potentially names and phone numbers)
Number of Records Exposed: 5000
Sensitivity of Data: Moderate (no passwords, wallet addresses, or banking data)
Data Exfiltration: Yes (listed for sale on dark web)
Personally Identifiable Information: Yes (emails, potentially names and phone numbers)
Regulatory Compliance
Were there any regulatory violations and fines imposed for each incident ?
Incident : Data Breach WALZEN1769189829
Regulations Violated: Potential GDPR violations (CNIL notified)
Legal Actions: Criminal complaint filed for unauthorized system access and attempted extortion
Regulatory Notifications: CNIL (France’s data protection authority)
How does the company ensure compliance with regulatory requirements ?
Ensuring Regulatory Compliance: The company ensures compliance with regulatory requirements through Criminal complaint filed for unauthorized system access and attempted extortion.
Lessons Learned and Recommendations
What lessons were learned from each incident ?
Incident : Data Breach WALZEN1769189829
Lessons Learned: Risks faced by crypto tax platforms handling sensitive transaction data under international reporting requirements; importance of verifying security codes in official communications to prevent impersonation scams.
What recommendations were made to prevent future incidents ?
Incident : Data Breach WALZEN1769189829
Recommendations: Enhanced monitoring for unauthorized access, user education on impersonation scams, and stricter data collection policies to avoid storing unnecessary personal information.
What are the key lessons learned from past incidents ?
Key Lessons Learned: The key lessons learned from past incidents are Risks faced by crypto tax platforms handling sensitive transaction data under international reporting requirements; importance of verifying security codes in official communications to prevent impersonation scams.
What recommendations has the company implemented to improve cybersecurity ?
Implemented Recommendations: The company has implemented the following recommendations to improve cybersecurity: Enhanced monitoring for unauthorized access, user education on impersonation scams and and stricter data collection policies to avoid storing unnecessary personal information..
References
Where can I find more information about each incident ?
Incident : Data Breach WALZEN1769189829
Source: Brinztech
Incident : Data Breach WALZEN1769189829
Source: Paris Prosecutor’s Office
Where can stakeholders find additional resources on cybersecurity best practices ?
Additional Resources: Stakeholders can find additional resources on cybersecurity best practices at and Source: Brinztech, and Source: Waltio Security NoticeDate Accessed: 2026-01-23, and Source: Paris Prosecutor’s Office.
Investigation Status
What is the current status of the investigation for each incident ?
Incident : Data Breach WALZEN1769189829
Investigation Status: Ongoing
How does the company communicate the status of incident investigations to stakeholders ?
Communication of Investigation Status: The company communicates the status of incident investigations to stakeholders through Security notice issued to users, CNIL notified and warnings about impersonation scams.
Stakeholder and Customer Advisories
Were there any advisories issued to stakeholders or customers for each incident ?
Incident : Data Breach WALZEN1769189829
Stakeholder Advisories: French authorities warned about criminals impersonating law enforcement to target victims; advised users to verify security codes in official communications.
Customer Advisories: Waltio advised users to verify security codes in official communications and be cautious of impersonation scams.
What advisories does the company provide to stakeholders and customers following an incident ?
Advisories Provided: The company provides the following advisories to stakeholders and customers following an incident: were French authorities warned about criminals impersonating law enforcement to target victims; advised users to verify security codes in official communications. and Waltio advised users to verify security codes in official communications and be cautious of impersonation scams..
Additional Questions
Incident Details
What was the most recent incident detected ?
Most Recent Incident Detected: The most recent incident detected was on 2025-12-24.
What was the most recent incident publicly disclosed ?
Most Recent Incident Publicly Disclosed: The most recent incident publicly disclosed was on 2026-01-23.
Impact of the Incidents
What was the most significant data compromised in an incident ?
Most Significant Data Compromised: The most significant data compromised in an incident were Emails and tax report summaries (potentially names and phone numbers).
Data Breach Information
What was the most sensitive data compromised in a breach ?
Most Sensitive Data Compromised: The most sensitive data compromised in a breach were Emails and tax report summaries (potentially names and phone numbers).
What was the number of records exposed in the most significant breach ?
Number of Records Exposed in Most Significant Breach: The number of records exposed in the most significant breach was 500.0.
Regulatory Compliance
What was the most significant legal action taken for a regulatory violation ?
Most Significant Legal Action: The most significant legal action taken for a regulatory violation was Criminal complaint filed for unauthorized system access and attempted extortion.
Lessons Learned and Recommendations
What was the most significant lesson learned from past incidents ?
Most Significant Lesson Learned: The most significant lesson learned from past incidents was Risks faced by crypto tax platforms handling sensitive transaction data under international reporting requirements; importance of verifying security codes in official communications to prevent impersonation scams.
What was the most significant recommendation implemented to improve cybersecurity ?
Most Significant Recommendation Implemented: The most significant recommendation implemented to improve cybersecurity was Enhanced monitoring for unauthorized access, user education on impersonation scams and and stricter data collection policies to avoid storing unnecessary personal information..
References
What is the most recent source of information about an incident ?
Most Recent Source: The most recent source of information about an incident are Waltio Security Notice, Brinztech and Paris Prosecutor’s Office.
Investigation Status
What is the current status of the most recent investigation ?
Current Status of Most Recent Investigation: The current status of the most recent investigation is Ongoing.
Stakeholder and Customer Advisories
What was the most recent stakeholder advisory issued ?
Most Recent Stakeholder Advisory: The most recent stakeholder advisory issued was French authorities warned about criminals impersonating law enforcement to target victims; advised users to verify security codes in official communications., .
What was the most recent customer advisory issued ?
Most Recent Customer Advisory: The most recent customer advisory issued was an Waltio advised users to verify security codes in official communications and be cautious of impersonation scams.
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Network Security
Identify exposed access points, detect misconfigured SSL certificates, and uncover vulnerabilities across the network infrastructure.
SBOM (Software Bill of Materials)
Gain visibility into the software components used within an organization to detect vulnerabilities, manage risk, and ensure supply chain security.
CMDB (Configuration Management Database)
Monitor and manage all IT assets and their configurations to ensure accurate, real-time visibility across the company's technology environment.
Threat Intelligence
Leverage real-time insights on active threats, malware campaigns, and emerging vulnerabilities to proactively defend against evolving cyberattacks.
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