We track 73 SOC 2 auditors with documented B2B SaaS experience, Type 2 from $3K with fieldwork from 1 week. Most firms can audit SaaS. Far fewer understand multi-tenant isolation, CI/CD change management, or matching your Availability scope to your SLAs. This page compares audit firms for SaaS companies; software-for-SaaS decisions live on /software/ and /insights/soc-2-software/.
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Tell us your scope once. We match it with firms that regularly audit SaaS companies and send 3–10 ballparks back side by side.
We match firms to your scope and bring their ballpark quotes back. Free and anonymized.
For SaaS teams, Thoropass runs an auditor-led engagement alongside existing GRC tools from $9,995, and Zero Day CPA is an economical first-audit option from an estimated $7K. We track 73 SaaS-focused firms; listed fieldwork starts at 1 week.
360 Advanced fits SaaS SOC 2 + multi-framework scope: coordinates shared evidence across frameworks, including an ANAB-accredited ISO 27001 certification body and a FedRAMP-listed 3PAO.
Zero Day CPA is a practical starting point for an early-stage SaaS team because its estimated Type 2 range starts at $7K, its stated client segments cover startups and SMBs, and it supports five named GRC platforms.
Thoropass fits B2B SaaS teams that want the audit run alongside Vanta, Drata, Secureframe, Hyperproof, Archer, or OneTrust, while its assurance team coordinates SOC 2 with ISO 27001, HIPAA, PCI DSS, and HITRUST from a shared evidence workflow.
Sensiba LLP fits a VC-backed SaaS company already using Drata and planning ISO work next because the same CPA firm is an ISO 27001 and ISO 42001 certification body that also supports Vanta, Secureframe, and Sprinto.
A-LIGN fits enterprise SaaS programs that need SOC 2 beside ISO 27001, FedRAMP, HITRUST, PCI DSS, or CMMC work because its assessor and certification-body credentials make it a broader option than a SOC-only boutique.
Choose a SaaS auditor by testing three things before price: whether the firm understands your tenant-isolation model, whether it will scope Availability against contractual SLAs, and whether its evidence workflow fits your CI/CD and GRC stack. Then compare named engagement staff, observation-period timing, renewal effort, and the exact deliverables in writing.
A B2B SaaS company scaling enterprise sales should work backward from procurement deadlines and likely framework fan-out. Use a fast Type 1 only when the buyer accepts it, start Type 2 evidence in parallel, and shortlist firms that can coordinate SOC 2 with ISO 27001, ISO 42001, HIPAA, or PCI without duplicating evidence.
A bundled provider can simplify contracting, evidence collection, and platform support, while an independent firm can offer more separation and flexibility across GRC tools. Neither model is automatically better. Ask who employs the signing CPA, how independence is protected, what happens if you change platforms, and which work is preparation versus attestation.
The proposal should explain how recurring evidence will be reused, which samples must be refreshed, how control changes are handled, and whether renewal pricing assumes a stable scope. A credible SaaS auditor can describe the year-two workflow before fieldwork begins, including GRC integrations, request ownership, expected engineering time, and the treatment of new subprocessors.
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All firms have SaaS listed as a core industry vertical with documented experience auditing multi-tenant and cloud-native products. Sponsored firms are paid placements and listed first; the rest follow by verification and Type 2 entry price. Pricing is in USD and timelines are in weeks.
Type 1 and Type 2 figures reflect a mix of firm-confirmed numbers, public sources, and our own estimates, refreshed periodically. Actual cost depends on company size, scope, and Trust Service Criteria.
Featured firms pay to appear first. Every firm here cleared our fit bar first; payment cannot add a firm or change its facts.
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Tell us your scope once. We match it with firms that regularly audit SaaS companies and send 3–10 ballparks back side by side.
We match firms to your scope and bring their ballpark quotes back. Free and anonymized.
SOC 2 lets you choose which Trust Service Criteria to include. Security is mandatory. Most B2B SaaS starts with Security and Availability; the right additions depend on product behavior and customer contracts.
| Factor | What it covers | SaaS relevance |
|---|---|---|
| Security (CC) | Logical access, encryption, monitoring, incident response | Required, always in scope |
| Availability | Uptime, performance monitoring, disaster recovery | Required if you have SLAs |
| Confidentiality | Data classification, NDA enforcement, data destruction | Add for sensitive business data |
| Processing Integrity | Accurate, complete, authorised data processing | Add for FinTech, payments, data pipelines |
| Privacy | PII collection, consent, data subject rights | Add for end-user PII at scale or EU customers |
Five control areas where the wrong auditor either generates findings against your engineering culture or underscopes risks that enterprise security buyers catch in security review.
Whether you run shared-schema with row-level security, siloed databases per tenant, or a hybrid, the auditor evaluates your isolation model before scoping begins. SaaS-specialised firms flag architectural risks before fieldwork and document tenant separation in a way enterprise security teams accept.
If you have committed to uptime in a customer MSA, enterprise security reviewers look for Availability coverage. Most first-time audits scope only Security, which may work for a first deal but not for SaaS with contractual uptime.
SaaS-experienced auditors evaluate pull-request approvals, deployment gates, and feature flags without asking you to document every release manually. Branch protection, code reviews, and deployment approval gates usually satisfy controls without slowing delivery.
Your scope includes how you evaluate, monitor, and contract with every vendor that touches customer data. SaaS-specialised firms bring vendor-tiering templates and know which subprocessors require SOC 2 reports versus basic security assessments.
After the first Type 2, SaaS-experienced auditors can reduce renewal effort by 50–70% through automated evidence collection from GRC platforms, CI/CD logs, and cloud monitoring. Ask how the firm will streamline year two before signing.
Four lines: auditor fees, GRC platform, security tooling, and internal engineering time. Year-two renewals typically drop to $12–30K in auditor fees with 50–70% less internal time once evidence collection is automated.
$15–50K
$8–15K
$5–12K
150–300 hrs
Five questions specific to SaaS architecture, TSC selection, and ongoing compliance, separate from the general first-audit questions on the startups page.
SOC 2 attestation vs consulting · SOC 2 reports must be issued by licensed Certified Public Accountants under AICPA standards (SSAE 18). Many GRC vendors offer SOC 2 preparation but cannot issue the attestation report itself.
Verify credentials · Confirm AICPA peer-review status and SSAE 18 attestation authority before signing. SaaS-specialised firms typically publish their AICPA peer-review report on request.
Disclaimer · Pricing and timelines shown reflect a mix of firm-confirmed figures, public sources, and our own estimates, refreshed periodically. Actual costs and timelines vary based on company size, complexity, and scope.
Tell us your stack, customer profile, and TSC scope. We send it to SaaS-fluent firms that fit. They reply with a ballpark, a timeline, and what makes them different.
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