What Zero Day CPA, PC does

Zero Day CPA, PC is a privately held professional corporation headquartered in West Bloomfield, Michigan that provides compliance auditing and penetration testing services to B2B organizations. The firm specializes in AICPA-aligned attestations, delivering SOC 1 examinations (Type I and Type II), SOC 2 compliance audits across the five Trust Services Criteria (with readiness assessments, gap analysis, and Type II+ reports that incorporate additional frameworks such as HIPAA or PCI DSS), SOC 3 publicly distributable reports, and HIPAA compliance audits for healthcare organizations handling protected health information. The practice is led by Lance Samona (President & CPA) and Patrick Sesi (Co-Founder & CTO), with Jaime Guri serving as Account Relationship Manager, combining audit credentials with offensive-security technical expertise.

The firm operates on a project-based professional services revenue model, with engagement scope, timelines, and pricing defined during an initial consultation and quoted on a per-engagement basis. All customer acquisition is direct: prospects are captured through the company website's Google Forms contact intake, a 1-800 phone line, and email outreach. There are no resellers, marketplaces, or channel partners, and no published pricing. The stated methodology follows a five-step process (initial consultation, scoping/communication, in-depth analysis, iterative report drafting, final delivery), and the firm markets itself on speed of turnaround, pragmatism for early-stage companies, and tailored solutions.

Customer evidence is drawn from seven named testimonials spanning SaaS/technology (Realfinity, Refyne Tech Pvt. Ltd, Housing Cloud), education (Campus Tree), professional services (Guardian Professional Services), healthcare (Health Hive), and HR (ViaPeople). The firm reports no funding rounds, no institutional or PE backing, no partnerships, no patents, and no awards; ownership appears to be founder-held. The company is actively operating with a live website and a 5-employee headcount, suggesting a boutique practice rather than a scaled platform.

Name

Zero Day CPA, PC

Legal name

Zero Day CPA, PC

Website

https://zerodaycpa.com

Company type

Private

Operating status

Operating

Headcount range

1–10 employees

Short description

Zero Day CPA, PC is a West Bloomfield, Michigan-based compliance auditing and penetration testing firm delivering SOC 1, SOC 2, SOC 3, and HIPAA attestations to B2B, SaaS, and healthcare organizations on a project-based, quote-driven engagement model.

Ownership category

akta.pro rank

Product category

Compliance Auditing Services

NAICS

Offices of Certified Public Accountants (541211)

akta.pro primary industry

Security Audits & Compliance (ISO 27001, SOC 2, PCI DSS, HIPAA, SOX) (BPAKADAC)

Keywords

• Compliance auditing services
• SOC 2 auditing
• Cybersecurity compliance
• CPA firm services
• HIPAA auditing

Headquarters

HQ city

West Bloomfield

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Revenue model

1. Compliance Audit Services: Zero Day CPA generates revenue through professional services engagements for SOC 1, SOC 2 (Type I & II), and SOC 3 compliance audits, as well as HIPAA compliance assessments and penetration testing services. Revenue is project-based, billed per engagement with scope defined during initial consultation.

Go-to-market motion1 record

Distribution channels2 records

Marketing channels4 records

Core offering

Zero Day CPA, PC is a professional accounting and compliance auditing firm. Based on its name and positioning, the firm provides SOC 1, SOC 2, SOC 3, and HIPAA compliance audit services, along with penetration testing, to organizations that must demonstrate security and regulatory controls to clients and partners.

Product overview

Zero Day CPA is a professional compliance auditing firm providing a unified suite of audit and attestation services. The company offers four interconnected service offerings: SOC 1 Examinations (for financial reporting controls), SOC 2 Compliance Audits (for security, availability, confidentiality, processing integrity, and privacy), SOC 3 Compliance (public-facing security reports), and HIPAA Compliance Audits (for healthcare data protection). These services share a common methodology including initial consultation, scoping and planning, control assessment, testing, and report delivery. The firm specializes in both Type I (point-in-time design evaluation) and Type II (ongoing effectiveness) audit reports, with the ability to combine multiple frameworks in Type II+ reports.

Differentiator

Problem solved

Functional benefit

Products and services

• SOC 1 Audits
• SOC 2 Audits
• SOC 3 Audits
• HIPAA Compliance Audits
• Penetration Testing

Quantifiable outcome

• Delivered SOC 2 report almost a week before the due date for Housing Cloud
• +1 more outcomes

Named customers7 records

Segments5 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Scale indicators1 record

Recent moves5 records

Expansion highlights4 records

Direct peers

• AssuranceLab: AssuranceLab is a tech-enabled CPA firm specializing in SOC 1, SOC 2, SOC 3, and HIPAA audits for SaaS and cloud providers. It targets the same buyer profile as Zero Day CPA with similar service offerings, often positioned as a more modern, automation-forward boutique.
• Laika: Laika combines a compliance automation platform with in-house SOC 2 audit services. It competes directly with Zero Day CPA by offering an integrated software-plus-audit product aimed at the same SaaS and tech startup buyer, and represents a hybrid peer in the boutique SOC audit space.
• A-LIGN: A-LIGN is a specialized cybersecurity compliance firm offering SOC 1/2/3 audits, ISO 27001, HITRUST, and penetration testing. It is a closely comparable direct competitor to Zero Day CPA in the boutique SOC 2 audit space, with similar service mix and target customer profile.
• Linford & Co. Linford & Co is a boutique CPA firm focused on SOC 1/2/3 audits and cybersecurity assessments for SaaS and tech companies. It is a near-perfect direct peer — small, specialized, sales-led, and serving the same early-stage to mid-market SaaS buyer as Zero Day.
• 360 Advanced: 360 Advanced (now part of A-LIGN) is a cybersecurity compliance firm providing SOC 1/2/3 audits, ISO 27001, HITRUST, and penetration testing. It is a direct boutique competitor to Zero Day CPA in serving SaaS, healthcare, and financial services clients.
• Schellman & Co. Schellman is a leading specialist attestation and cybersecurity firm providing SOC 1/2/3 audits, ISO certifications, and FedRAMP assessments. It competes head-to-head with Zero Day CPA for mid-market and enterprise SOC engagements and is one of the most-recognized boutique audit firms.

Emerging players

• Drata: Drata is a compliance automation platform that automates SOC 2, ISO 27001, HIPAA, and other audits. It overlaps with Zero Day CPA's buyer base by enabling customers to self-serve evidence collection, compressing demand for traditional audit services.
• Vanta: Vanta is a leading compliance automation platform that has expanded into adjacent audit services and is increasingly competing with traditional audit firms for SOC 2 buyers. While it is a technology platform rather than a CPA firm, it represents the most disruptive force on Zero Day CPA's addressable market.

Broad incumbents

• BDO USA: BDO USA is a major accounting and advisory firm with a substantial SOC 2/3 and cybersecurity practice. As a broader incumbent, it overlaps with Zero Day CPA for mid-market and enterprise assurance engagements while offering a much wider service portfolio.
• RSM US: RSM US is a top-tier global accounting and advisory firm offering SOC 1/2/3 audits, ISO certifications, and cybersecurity services across all segments. It competes with Zero Day CPA in the mid-market and enterprise tiers as a larger, brand-recognized incumbent with broader service capabilities.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat3 records

Key risks5 records

Key highlights5 records

Customer concentration

• LinkedInlinkedin.com/company/zero-day-cpa-pc

Compliance5 records

Revenue estimate

Valuation estimate

Number of profiles

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Zero Day CPA, PC