Selecting the right SOC 2 auditor can make or break your compliance journey, not just during the audit itself, but in everything that follows. At TrustCloud, we’ve seen firsthand how choosing an auditor who understands your industry, communicates clearly, and aligns with your goals sets the tone for both efficiency and assurance. Whether you’re navigating tight deadlines, complex environments, or scaling operations, this guide will walk you through the essential qualities to look for in an auditor so you can complete your SOC 2 audit with confidence and clarity.
TrustCloud teamed up with Dan Andrea, a partner at KLR, to discuss:
- Preparing for a successful SOC 2 audit
- Evaluation criteria for SOC 2 auditor selection
- Factors that influence the cost of an audit
Read more of Dan’s suggestions below, or check out the conversation on YouTube.
What is SOC 2?
SOC 2 (System and Organization Controls 2) is a widely recognized compliance framework developed by the American Institute of Certified Public Accountants (AICPA). It is specifically designed for technology and cloud-based companies that handle customer data, ensuring they manage and protect information in a way that upholds security, availability, processing integrity, confidentiality, and privacy, known as the Trust Services Criteria.
Unlike certifications that provide a simple pass/fail status, SOC 2 results in a detailed audit report. This report shows how a company’s internal controls and practices meet these trust principles, giving stakeholders confidence that data is safeguarded against unauthorized access, downtime, misuse, or leaks.
SOC 2 is especially important for SaaS providers, data centers, managed service providers, and any business that stores or processes customer information in the cloud. It has become a key differentiator in competitive markets, not just proving compliance but demonstrating a company’s commitment to security and trust.
Preparing for a successful audit
Before selecting a SOC 2 auditor, there are a few important steps a company can take:
- It’s critical to have a plan and realistic roadmap in place for any audit. Most organizations have undergone various technology assessments like pen tests or vulnerability scans, but preparing for an audit may involve more time and resources than these assessments.
- Like any project, you need commitment from the top. Preparing for an audit serves as a means to instill a control-oriented mindset across the organization, showing clients and company leaders, owners, senior executives, and the board that the systems in place are not just compliant but also functioning effectively.
- You’ll need a project leader to liaise with the SOC 2 auditor, as well as manage DevOps, change management, and HR and coordinate efforts across teams. It’s essential for team members from different departments to respect and collaborate effectively with this key person, ensuring smooth processes.
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Learn MoreHow do you pick the right auditor?
When selecting the right auditor for your organization, consider the following evaluation criteria:
Suitability
If you’re a startup, you want to choose a SOC 2 auditor who understands the nuances of a startup environment. If you get an auditor accustomed to working with multi-billion-dollar clients, they may provide you with a generic request list without offering tailored guidance suitable for smaller organizations. Similarly, if you’re a larger organization, it’s important to find an auditor with relevant experience.
You’re not only seeking an audit but also advice, so it’s important that they understand your priorities. Review their track record with similar-sized companies, request references, and invest time in understanding their approach.
Ability to answer questions
An auditor should be able to explain how audits work and how your company should get ready for one. Some questions to ask include:
- What’s a typical timeline?
- How will we track our progress?
- What Trust Service Criteria (Security, Availability, Processing Integrity, confidentiality, and/or Privacy) are we auditing against?
- What’s the difference between confidentiality and privacy?
Reliability
When evaluating any CPA firm, make sure that their own practices have been audited by another firm. The CPA industry has a peer review process, subjecting a firm’s operations to audit by other firms every two years. That’s the auditor being audited, which ensures they’re delivering high-quality services.
Responsiveness
Send the potential auditor an email and observe how long it takes to get a response. This initial interaction offers insight into how they manage client engagement. You want someone who is available to answer your questions and provide updates.
Read the “Confidently choose your SOC 2 trust service criteria” article to learn more!
How much will an audit cost?
When budgeting for a SOC 2 audit, there’s no one-size-fits-all price tag. The cost can vary widely depending on your organization’s size, complexity, and goals. Factors like where your company operates, how the work is divided between firms, whether offshoring is involved, and the type of audit you choose all play a role in determining the final price. Understanding these elements upfront can help you set realistic expectations, avoid surprises, and even find opportunities to negotiate. Here’s a closer look at the key factors that can influence your audit costs.
Here are some factors that may have an impact on the pricing process:
- Geography
The location of the company being audited and its customers may impact pricing, as some regions have specific regulatory requirements that can increase costs. Also, some markets are more expensive than others, so a firm’s location may also influence pricing. - Division of Tasks
Sometimes CPA firms just give their opinion, and a smaller non-CPA firm will actually do the testing, affecting both pricing and service quality. - Offshoring
Sometimes firms offshore the work, which can save money. If clients are sensitive to privacy and security, then they might become sensitive to where their data is going. There’s a tradeoff here, and you want to be aware of who has access to your data. - Audit Duration
The time required to complete the audit process can affect pricing. Some clients prefer faster processes and may negotiate costs accordingly. - Trust Service Criteria
The criteria in scope will impact the price; remember, you DO NOT need to do all five. Start small if you can and expand as necessary. - Audit type
Will this be a Type 1 (design of controls) or a Type 2 (design of controls AND operating effectiveness)? The choice will often be driven by your business partners. Generally speaking, you will need to have a Type 2 that covers a specified period of time, such as 6 months.
And always remember that you can negotiate!
Quality comes with a certain cost. The audit process should provide genuine assurance and not just fulfill a checklist.
Prepare to pass your SOC 2 audit
A successful SOC 2 audit shows customers and prospects that you’re serious about protecting their data. TrustCloud helps you achieve SOC 2 attestation faster, with less stress on each subsequent audit.
Long-term benefits of partnering with the right SOC 2 auditor
Partnering with the right auditor delivers value that extends well beyond achieving compliance. A skilled auditor brings structure and discipline to your control environment through rigorous testing and practical feedback. This process helps organizations uncover hidden gaps, streamline internal workflows, and improve accountability across teams. Over time, these improvements lead to stronger operational maturity, where controls are not just documented but consistently followed. Ongoing guidance from experienced auditors also helps teams stay aligned with evolving risks, ensuring that security and compliance grow alongside the business.
In the long run, the right audit partner helps organizations build a unified compliance strategy. By aligning SOC 2 with frameworks such as ISO 27001 or NIST, auditors reduce duplicated efforts and simplify future assessments. This integrated approach strengthens third-party risk management and makes compliance easier to scale. A well-scoped SOC 2 report also shortens enterprise sales cycles, lowers breach exposure, and signals reliability to customers. Ultimately, it builds lasting trust by demonstrating a mature, proactive security posture.
Turning SOC 2 auditor selection into a strategic decision
Choosing a SOC 2 auditor is more than a compliance requirement; it is a strategic decision that shapes how your security program is evaluated, communicated, and improved over time. The right firm acts as both an independent assessor and a collaborative advisor, helping you interpret the Trust Services Criteria through the lens of your unique business model and growth stage.
- Match auditor suitability to your stage
Look for an auditor who regularly works with companies similar to yours in size, industry, and cloud stack. Startups benefit from partners who understand rapid change and limited resources, while larger enterprises need firms comfortable with complex environments, multiple entities, and layered internal controls. - Validate accreditation and peer review
Confirm that the firm is a licensed CPA practice and participates in the AICPA peer review process. Peer review (“the auditor being audited”) provides assurance that their own quality controls are tested regularly, which directly affects the credibility of your final SOC 2 report with customers and regulators. - Probe their ability to educate and guide
Use scoping calls to assess how clearly they explain audit scope, Trust Services Criteria, timelines, and evidence expectations. If they can demystify concepts like the difference between confidentiality and privacy or Type I vs. Type II, they will likely be a strong partner throughout the engagement. - Assess methodology and use of automation
Ask how they gather evidence, run walkthroughs, and track requests during the audit. Firms that leverage modern platforms (including TrustCloud) to manage PBC lists, testing, and status dashboards typically deliver smoother audits with fewer email threads and surprises. - Check for responsiveness and cultural fit
Your auditor will collaborate closely with engineering, security, and leadership, so responsiveness and working style matter. Look for teams that answer questions promptly, respect your internal cadence, and approach findings as opportunities for improvement rather than gotchas. - Clarify pricing, scope, and deliverables upfront
Request a detailed proposal that outlines included services, observation period length, in-scope TSCs, readiness vs. formal audit work, and how change orders are handled. This transparency avoids hidden costs and ensures expectations are aligned before you sign an engagement letter.
When SOC 2 auditor selection is treated as a strategic partnership decision, not just a procurement task, you set up your organization for smoother audits, stronger findings, and a report that stakeholders truly trust.
SOC 2 Overview and Guides
This guide provides a comprehensive introduction to the SOC 2 compliance readiness process, essential for SaaS vendors in the United States.
Making scoping a strategic conversation
More than just ticking boxes, a well-scoped audit lays the groundwork for a smoother process and more valuable outcome. When you involve your auditor early to define your scope from systems and services to desired Trust Services Criteria, you avoid surprises, reduce audit friction, and set the stage for strategic insights.
Here are five ways to make audit scoping work in your favor:
- Define System Boundaries Clearly
Work closely with your auditor to establish which infrastructure and processes fall in scope. This ensures that no essential systems are overlooked and non-critical ones don’t drag out the audit timeline. - Select Relevant Trust Services Criteria (TSC)
Beyond mandatory security, choose only the additional criteria, like confidentiality or privacy, that align with your business needs and customer expectations. This keeps the audit focused and meaningful. - Align with Your Business Workflow
Match your chosen scope with current operational practices and controls. The more closely your audit scope aligns with your real-world operations, the easier it will be to gather evidence and avoid “disconnects.” - Plan for Future Framework Expansion
If you’re already considering HITRUST, ISO 27001, or HIPAA down the line, scope your SOC 2 audit with cross-compatibility in mind. It saves you time and rework later. - Document and Validate with Your Auditor
Record your scope decisions clearly and share them with your auditor. That clarity helps ensure shared expectations and enables targeted testing, rather than starting from scratch on assumptions.
About Dan Andrea: Dan has over 40 years of public accounting experience in the performance of forensic accounting and litigation support procedures, SOC 1, 2, and 3 examinations, internal accounting controls assessments for ISO 27001, HIPAA, and NIST, financial statement audits, and information technology consulting services. Dan specializes in cybersecurity, social engineering, and data privacy audits in a variety of industries, including manufacturing and distribution, financial services (financial institutions, trust companies, and family offices), and tax-exempt industries.
About KLR: KLR is one of the largest public accounting firms headquartered in New England, with practice areas including accounting and assurance, tax services, transaction advisory services, cyber security, and more. Learn more at https://kahnlitwin.com/
Summing it up
Selecting the right SOC 2 auditor goes beyond ticking compliance boxes; it’s about choosing a partner who understands your company’s journey, speaks your language, and guides you toward meaningful assurance. Start with firms whose experience aligns with your company’s maturity and industry. Seek those willing to explain their process clearly from timelines and Trust Service Criteria to progress tracking and lean on their peer-reviewed credibility for confidence in their professionalism.
Responsiveness matters. Early interactions, like response time to initial inquiries, can reveal how an auditor treats client relationships long before contracts are signed.
Also, think long term. A skilled auditor becomes more than an assessor; they become a trusted advisor whose familiarity with your systems accelerates future audits, smooths collaboration, and reduces friction.
In the end, the right auditor empowers you, not just with a report, but with confidence and clarity. When you select an auditor who genuinely understands your organization and partners with you, SOC 2 isn’t just an audit; it becomes a catalyst for stronger controls, deeper trust, and sustained success.
FAQs
What should I consider when selecting a SOC 2 auditor for my organization?
Choosing a SOC 2 auditor is more than a checkbox exercise; it’s a strategic decision that affects your audit experience, compliance credibility, and long-term security posture. Start by finding an auditor whose experience aligns with your company’s size, industry, and technology stack, ensuring they understand your unique environment.
Verify that the firm is a licensed CPA practice and participates in peer review processes to ensure quality and credibility. During initial conversations, assess how clearly they explain audit timelines, Trust Services Criteria, and evidence expectations. Also evaluate responsiveness, communication style, and cultural fit, because the auditor will work closely with your team throughout the engagement.
Why is auditor accreditation and peer review important for SOC 2 compliance?
Accreditation and peer review provide assurance about the quality and reliability of the auditor you choose. Only licensed CPA firms can issue formal SOC 2 attestations, and participation in the AICPA’s peer review process means the auditor’s own practices have been evaluated by another firm.
This ensures they follow professional standards and maintain effective quality controls, directly affecting the validity of your SOC 2 report. Selecting an auditor without proper accreditation or peer review increases the risk of receiving a report that stakeholders, partners, or regulators may question. Confirming accreditation and review history helps build trust and strengthens the credibility of your compliance efforts.
How can I ensure a smooth SOC 2 audit process with my auditor?
A smooth SOC 2 audit begins with transparent communication and clear expectations. Before engagement, request a detailed proposal outlining pricing, scope, timeline, deliverables, and how change orders will be handled. Clarify whether the audit will cover a Type I or Type II assessment and which Trust Services Criteria are in scope. Early collaboration with your auditor on scoping helps align the audit with your workflows and avoids last-minute surprises.
Ask how they handle evidence collection, reporting, and walkthroughs, firms that use modern tools often deliver more efficient audits. Responsiveness and a collaborative attitude are key, as they ensure questions are addressed quickly and the process remains transparent for all stakeholders.
