Insights

Client scope System Six serves small to mid-sized organizations with over $200M in client revenue, 1,000+ jobs, and significant nonprofit spend, indicating a strong potential for cross-sell of cloud-based accounting, payroll, and advisory services to growing clients seeking scalable finance operations.

Remote cloud advantage Emphasize System Six’s remote, cloud-based delivery model and modern culture to attract prospects prioritizing flexible, cost-efficient outsourced finance functions, especially those considering distributed teams and digital collaboration tools.

Tech stack leverage Leverage familiarity with QuickBooks Online, NetSuite, Sage Intacct, Shopify, and other cloud platforms to propose integrated solutions, automation, and data-driven advisory services tailored to clients already using or migrating to these systems.

Growth mindset Position the firm’s focus on top-tier compensation, continuous learning, and culture as a differentiator to attract clients seeking high-quality, stable outsourced accounting teams for long-term partnerships and strategic finance support.

Expansion potential With revenue in the $25M–$50M range and a scalable, process-driven model, target mid-market firms and nonprofits looking to optimize cash flow, automate bill pay, payroll, and advisory functions, offering both cost savings and velocity improvements.

Similar companies to System Six

System Six Tech Stack

System Six uses 8 technology products and services including Quickbooks Online, Sage Intacct, HubSpot Analytics, and more. Explore System Six's tech stack below.

System Six's Email Address Formats

System Six uses at least 3 email formats:
System Six Email FormatsExamplePercentage
First@systemsix.comJohn@systemsix.com
63%
Last@systemsix.comDoe@systemsix.com
23%
First.Last@systemsix.comJohn.Doe@systemsix.com
14%

Frequently Asked Questions

What is System Six's phone number?

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You can contact System Six's main corporate office by phone at . For more prospecting data, LeadIQ has access to up-to-date and accurate contact information within our platform. Find, capture, and sync contact data to your CRM and sales tools in one click.

What is System Six's official website and social media links?

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System Six's official website is systemsix.com and has social profiles on LinkedIn.

How much revenue does System Six generate?

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As of August 2026, System Six's annual revenue is estimated to be $25M - $50M.

What is System Six's SIC code and NAICS code?

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System Six's SIC code is 8721 - Accounting, Auditing, and Bookkeeping Services and NAICS code is 5412 - Accounting, Tax Preparation, Bookkeeping, and Payroll Services.

How many employees does System Six have currently?

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As of August 2026, System Six has approximately 39 employees across 3 continents, including North America, Asia and Europe. Key team members include Assistant Operations And Finance Manager: D. L., Senior Bookkeeper: K. I. R. F. and Principal: A. G. Explore System Six's employee directory with LeadIQ.

What industry does System Six belong to?

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System Six operates in the Accounting industry.

What technology does System Six use?

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System Six's tech stack includes Quickbooks Online, Sage Intacct, HubSpot Analytics, Linkedin Insight Tag, WordPress, NetSuite, Shopify and ChatGPT.

What is System Six's email format?

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System Six's email format typically follows the pattern of First@systemsix.com. Find more System Six email formats with LeadIQ.

When was System Six founded?

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System Six was founded in 2008.
System Six logo

System Six

AccountingWashington, United States11-50 Employees

System Six is a Seattle-based, remote, cloud-based accounting firm offering outsourced finance and accounting services. It operates with two equal aims: creating rewarding accounting careers for its team and freeing clients to focus on their core work, whether in business, family, or non-profit activities. The firm relies on a team-based service model and a strong emphasis on process to deliver services such as outsourced accounting, bill pay, payroll, and advisory support.

Its client base includes organizations with more than $200 million in annual revenue, more than 1,000 jobs, and significant non-profit spend, reflecting a diverse set of customers. Within the accounting industry, System Six positions itself as a modern firm that handles finance and accounting remotely, supported by a culture focused on learning and growth.

Section iconCompany Overview

Phone number
SIC Code
8721 - Accounting, Auditing, and Bookkeeping Services
NAICS Code
5412 - Accounting, Tax Preparation, Bookkeeping, and Payroll Services
Founded
2008
Employees
11-50

Section iconFunding & Financials

  • $25M - $50M

    System Six's revenue is estimated to be in the range of $25M - $50M

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