Comparison Overview

Optionis Group

VS

RSM US LLP

Optionis Group

Last Update: 2025-12-17
Between 700 and 749

The Optionis group are experts in accountancy, employment, tax and professional services to the contractor and SME markets. Operating through several brands including ; SJD Accountancy, Nixon Williams, Parasol, ClearSky Contractor Accounting, Brian Alfred and ClearSky Business. SJD Accountancy is the largest contractor accounting specialist in the UK supporting over 15,000 clients and with offices throughout the UK Nixon Williams has been providing specialist accountancy services to contractors, freelancers, consultants and interim professionals throughout the UK since 1995 Parasol is a professional employment organisation (PEO) and the leading provider of outsourced employment services to the UK’s contingent workforce, the staffing businesses who deal with them and the hirers who rely on their skills and knowledge ClearSky Contractor Accounting, one of the UK's largest accountancy firms, is a specialist provider of hassle-free support and advice to Limited company contractors and freelancers First Freelance specialises in tailored contractor accountancy and support services, with their clients including the antipodean market Brian Alfred is one of the UK’s leading tax rebate specialists, Brian Alfred helps CIS, self-employed and PAYE workers gain maximum tax rebates in just 24 hours ClearSky Business supports SMEs across the UK with expert and affordable accounting, payroll and tax support The Optionis group employs around 700 head office employees across 10 sites around the UK. For more information visit www.optionis.co.uk

NAICS: 5412
NAICS Definition: Accounting, Tax Preparation, Bookkeeping, and Payroll Services
Employees: 324
Subsidiaries: 3
12-month incidents
0
Known data breaches
1
Attack type number
1

RSM US LLP

30 S Wacker Dr, Suite 3300, Chicago, Illinois, US, 60606
Last Update: 2025-12-17
Between 750 and 799

Stay Alert: Avoid Recruitment Scams Across industries, cybercriminals are posing as company recruiters using fake job postings and employment offers to trick people into providing personal information or payment. Be alert and never provide personal/financial information or payment to anyone claiming to offer a job opportunity. During the recruiting process, RSM US will never: • Ask you for payment to process documents, purchase equipment, or for any other reason. • Request your banking or credit card information • Send you a check to purchase your own equipment If you believe you are a victim of a job scam, it’s recommended that you report it to law enforcement, contact your financial institution and notify the website in which the job was listed. --- RSM is the leading provider of assurance, tax and consulting services to the middle market. With over 17,000 professionals across the U.S. and Canada and a global presence in 120 countries, our purpose is to deliver the power of being understood to our clients, colleagues and communities. As first-choice advisors, we are focused on developing leading professionals and innovative services to meet our clients’ evolving needs in today’s ever-changing business environment. At RSM, we strive to deeply understand the full picture of an employee’s individual skills and passions. Our culture empowers you to own your career to reach your goals and make a meaningful impact on the world around you. Gain limitless opportunities to grow forward personally and professionally. Don’t just go forward. #GrowForwardatRSM For more information, visit rsmus.com Learn how you can #GrowForwardatRSM visit www.rsmus.com/careers

NAICS: 5412
NAICS Definition: Accounting, Tax Preparation, Bookkeeping, and Payroll Services
Employees: 19,336
Subsidiaries: 1
12-month incidents
0
Known data breaches
0
Attack type number
0

Compliance Badges Comparison

Security & Compliance Standards Overview

https://images.rankiteo.com/companyimages/optionis.jpeg
Optionis Group
ISO 27001
ISO 27001 certification not verified
Not verified
SOC2 Type 1
SOC2 Type 1 certification not verified
Not verified
SOC2 Type 2
SOC2 Type 2 certification not verified
Not verified
GDPR
GDPR certification not verified
Not verified
PCI DSS
PCI DSS certification not verified
Not verified
HIPAA
HIPAA certification not verified
Not verified
https://images.rankiteo.com/companyimages/rsm-us-llp.jpeg
RSM US LLP
ISO 27001
ISO 27001 certification not verified
Not verified
SOC2 Type 1
SOC2 Type 1 certification not verified
Not verified
SOC2 Type 2
SOC2 Type 2 certification not verified
Not verified
GDPR
GDPR certification not verified
Not verified
PCI DSS
PCI DSS certification not verified
Not verified
HIPAA
HIPAA certification not verified
Not verified
Compliance Summary
Optionis Group
100%
Compliance Rate
0/4 Standards Verified
RSM US LLP
0%
Compliance Rate
0/4 Standards Verified

Benchmark & Cyber Underwriting Signals

Incidents vs Accounting Industry Average (This Year)

No incidents recorded for Optionis Group in 2025.

Incidents vs Accounting Industry Average (This Year)

No incidents recorded for RSM US LLP in 2025.

Incident History — Optionis Group (X = Date, Y = Severity)

Optionis Group cyber incidents detection timeline including parent company and subsidiaries

Incident History — RSM US LLP (X = Date, Y = Severity)

RSM US LLP cyber incidents detection timeline including parent company and subsidiaries

Notable Incidents

Last 3 Security & Risk Events by Company

https://images.rankiteo.com/companyimages/optionis.jpeg
Optionis Group
Incidents

Date Detected: 6/2016
Type:Breach
Blog: Blog
https://images.rankiteo.com/companyimages/rsm-us-llp.jpeg
RSM US LLP
Incidents

No Incident

FAQ

RSM US LLP company demonstrates a stronger AI Cybersecurity Score compared to Optionis Group company, reflecting its advanced cybersecurity posture governance and monitoring frameworks.

Optionis Group company has historically faced a number of disclosed cyber incidents, whereas RSM US LLP company has not reported any.

In the current year, RSM US LLP company and Optionis Group company have not reported any cyber incidents.

Neither RSM US LLP company nor Optionis Group company has reported experiencing a ransomware attack publicly.

Optionis Group company has disclosed at least one data breach, while the other RSM US LLP company has not reported such incidents publicly.

Neither RSM US LLP company nor Optionis Group company has reported experiencing targeted cyberattacks publicly.

Neither Optionis Group company nor RSM US LLP company has reported experiencing or disclosing vulnerabilities publicly.

Neither Optionis Group nor RSM US LLP holds any compliance certifications.

Neither company holds any compliance certifications.

Optionis Group company has more subsidiaries worldwide compared to RSM US LLP company.

RSM US LLP company employs more people globally than Optionis Group company, reflecting its scale as a Accounting.

Neither Optionis Group nor RSM US LLP holds SOC 2 Type 1 certification.

Neither Optionis Group nor RSM US LLP holds SOC 2 Type 2 certification.

Neither Optionis Group nor RSM US LLP holds ISO 27001 certification.

Neither Optionis Group nor RSM US LLP holds PCI DSS certification.

Neither Optionis Group nor RSM US LLP holds HIPAA certification.

Neither Optionis Group nor RSM US LLP holds GDPR certification.

Latest Global CVEs (Not Company-Specific)

Description

httparty is an API tool. In versions 0.23.2 and prior, httparty is vulnerable to SSRF. This issue can pose a risk of leaking API keys, and it can also allow third parties to issue requests to internal servers. This issue has been patched via commit 0529bcd.

Risk Information
cvss4
Base: 8.8
Severity: LOW
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Description

5ire is a cross-platform desktop artificial intelligence assistant and model context protocol client. In versions 0.15.2 and prior, an RCE vulnerability exists in useMarkdown.ts, where the markdown-it-mermaid plugin is initialized with securityLevel: 'loose'. This configuration explicitly permits the rendering of HTML tags within Mermaid diagram nodes. This issue has not been patched at time of publication.

Risk Information
cvss3
Base: 9.6
Severity: LOW
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
Description

continuwuity is a Matrix homeserver written in Rust. Prior to version 0.5.0, this vulnerability allows a remote, unauthenticated attacker to force the target server to cryptographically sign arbitrary membership events. The flaw exists because the server fails to validate the origin of a signing request, provided the event's state_key is a valid user ID belonging to the target server. This issue has been patched in version 0.5.0. A workaround for this issue involves blocking access to the PUT /_matrix/federation/v2/invite/{roomId}/{eventId} endpoint using the reverse proxy.

Risk Information
cvss4
Base: 9.9
Severity: LOW
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:L/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Description

LangChain is a framework for building LLM-powered applications. Prior to @langchain/core versions 0.3.80 and 1.1.8, and prior to langchain versions 0.3.37 and 1.2.3, a serialization injection vulnerability exists in LangChain JS's toJSON() method (and subsequently when string-ifying objects using JSON.stringify(). The method did not escape objects with 'lc' keys when serializing free-form data in kwargs. The 'lc' key is used internally by LangChain to mark serialized objects. When user-controlled data contains this key structure, it is treated as a legitimate LangChain object during deserialization rather than plain user data. This issue has been patched in @langchain/core versions 0.3.80 and 1.1.8, and langchain versions 0.3.37 and 1.2.3

Risk Information
cvss3
Base: 8.6
Severity: LOW
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
Description

LangChain is a framework for building agents and LLM-powered applications. Prior to versions 0.3.81 and 1.2.5, a serialization injection vulnerability exists in LangChain's dumps() and dumpd() functions. The functions do not escape dictionaries with 'lc' keys when serializing free-form dictionaries. The 'lc' key is used internally by LangChain to mark serialized objects. When user-controlled data contains this key structure, it is treated as a legitimate LangChain object during deserialization rather than plain user data. This issue has been patched in versions 0.3.81 and 1.2.5.

Risk Information
cvss3
Base: 9.3
Severity: LOW
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N