Top Audit Support Companies for Startups and SMEs

For startups and small-to-medium enterprises (SMEs), navigating the world of compliance and financial reporting can feel overwhelming. With limited internal resources and mounting regulatory pressures, these businesses often seek external partners to handle their audit and assurance needs.

That’s where audit support companies step in. They offer tailored services designed to fit the unique scale and pace of smaller enterprises, helping founders and business owners focus on growth rather than paperwork.

But not every firm is the right fit for emerging businesses. Some are too expensive; others lack the agility startups require. To help you decide, here’s a list of audit support companies that stand out for their expertise, affordability, and commitment to working with startups and SMEs.

1. Deloitte Private

While Deloitte is often associated with large corporations, its “Deloitte Private” segment specifically caters to emerging and mid-sized enterprises. They provide scalable audit support that aligns with a growing business’s evolving demands.

Head Office: London, UK (Global presence)
Services: Financial statement audits, risk management, regulatory reporting
Unique Edge: Dedicated team for private businesses and entrepreneurs

Startups appreciate Deloitte Private’s ability to combine the strength of a global firm with the flexibility smaller companies need.

2. Grant Thornton

Grant Thornton has positioned itself as a strong choice for businesses aiming for rapid growth. They understand the entrepreneurial mindset and deliver solutions that fit tight budgets without compromising on thoroughness.

Head Office: Chicago, USA (International reach)
Services: Financial audits, internal control assessments, transaction support
Unique Edge: Deep mid-market specialization and client-centric approach

Their teams are known for explaining complex financial issues in simple, actionable language—a big plus for busy founders.

3. BDO

BDO is a favorite among mid-sized businesses because it offers personalized audit support without the bureaucracy often found in larger firms. They’re adept at adjusting their services for businesses in different stages of development.

Head Office: Brussels, Belgium (Global network)
Services: Audit & assurance, financial reporting, compliance services
Unique Edge: Tailored services for fast-growing businesses

Entrepreneurs value BDO’s collaborative approach, where partners stay closely involved throughout engagements.

4. Mazars

Mazars blends international resources with local insights, making it an excellent option for startups looking to scale. Their transparent processes and clear communication help clients stay compliant and informed.

Head Office: Paris, France (Global operations)
Services: Financial audits, internal audits, sustainability reporting
Unique Edge: Ethical standards and flexibility for cross-border needs

Mazars’ smaller firm feel combined with a global footprint appeals to startups with global ambitions.

5. RSM

RSM shines in the mid-market segment, offering practical audit support solutions that keep startups compliant and confident. Their cost structures are more approachable than larger firms, making them ideal for budget-conscious businesses.

Head Office: London, UK (Global presence)
Services: Audit services, financial advisory, risk management
Unique Edge: Focused expertise for growing enterprises

Startups praise RSM for their proactive guidance and straightforward communication.

6. CapacityHive

CapacityHive has quickly carved out a name in the audit support world, particularly among startups and SMEs looking for digital-first, affordable solutions. They specialize in simplifying audit tasks so business owners can concentrate on innovation and expansion.

Head Office: London, UK (serving clients globally)
Services: Audit documentation preparation, compliance support, digital audit workflows
Unique Edge: Agile service model with budget-friendly pricing

Unlike traditional firms, CapacityHive emphasizes speed, user-friendly tools, and clear deliverables. Many emerging businesses find them to be a breath of fresh air compared to traditional providers.

7. Baker Tilly

Baker Tilly has earned respect for delivering audit services that align with the pace of startups and mid-sized businesses. Their teams are skilled at providing valuable insights beyond the numbers, helping clients improve internal processes.

Head Office: Chicago, USA (international operations)
Services: Audit & assurance, financial reviews, growth advisory
Unique Edge: Relationship-driven service model

Founders often mention how approachable Baker Tilly’s professionals are and how well they understand the entrepreneurial journey.

8. PKF International

PKF offers audit support solutions designed to be flexible and cost-effective, making them a solid partner for startups operating under budget constraints. They maintain strong local relationships while tapping into a global network.

Head Office: London, UK (worldwide coverage)
Services: External audits, financial statements, compliance services
Unique Edge: Strong support for owner-managed businesses

Startups appreciate PKF’s ability to deliver high-quality work without the intimidating price tags of larger firms.

9. Crowe

Crowe focuses on delivering personalized attention to clients, ensuring startups feel supported through the audit process. They blend technology with traditional expertise to provide efficient services.

Head Office: Chicago, USA (global reach)
Services: Financial audits, risk services, data analytics
Unique Edge: Innovative use of technology for efficient audits

Crowe’s approach works well for startups seeking transparency and speed without sacrificing quality.

10. Moore Global

Moore Global has a strong presence in supporting mid-sized enterprises and fast-growing startups. Their collaborative network of independent firms allows them to offer tailored services at competitive prices.

Head Office: London, UK (global network)
Services: Audit, assurance, business advisory
Unique Edge: Local knowledge with a global outlook

Moore Global’s flexibility makes them an attractive option for businesses experiencing rapid growth or planning international expansion.

How to Select the Right Audit Support Partner

When choosing an audit support provider, startups and SMEs should keep a few factors in mind:

✅ Does the firm specialize in businesses of your size?

✅ Are their solutions scalable as your company grows?

✅ How transparent are they with pricing?

✅ Do they use modern tools for faster, smoother processes?

✅ Will you have direct access to experienced professionals?

A good audit partner should feel like an extension of your team—not an intimidating external vendor.

Final Thoughts

Startups and SMEs thrive on agility, innovation, and smart financial management. Partnering with the right audit support firm can ease the burden of compliance, offer strategic insights, and free up valuable time for what matters most: growing your business.