Upstate Business Guide

The Upstate firms worth a phone call, checked at the source.

A short list of the managed IT shops, CPA firms and other vendors that Greenville-area companies hire. We read each firm's own site, wrote down what it actually says, and put a date on it.

Browse by what you need

Two categories are deep. The rest are being filled in, carefully.

21 firms Managed IT providers Outsourced IT support, security and help desk Browse the list 23 firms CPA and accounting firms Business tax, audit, advisory and outsourced accounting Browse the list

What we check before a firm goes in

The firm did not write its listing. We did, from its own site, and we say where each fact came from.

Read how we verify
  1. An Upstate office or a stated Upstate service arearequired
  2. Services, taken from the firm's own service pagesrequired
  3. Who they say they work with, in their words, paraphrasedif stated
  4. Year founded, certifications, partner statusif stated
  5. The page we read it on, and the date we read italways
  6. Ratings, reviews, rankingsnever

Read this before you sign anything

How to choose a managed IT provider in Greenville What you are actually buying, what a monthly agreement should cover, the security baseline to insist on, and the offboarding question most people forget to ask. 9 min read Questions to ask a CPA firm before you switch Fit, scope, fees, timing and handoff. The conversation to have before you move your books, your returns and your history to a new firm. 8 min read

A few from the list

See all 57 firms

  • Acumen IT

    Greer, SC Founded 1999 Managed IT
    • Managed IT services
    • Co-managed IT
    • Cybersecurity and 24/7 monitoring
    • HIPAA, FINRA, CMMC and CJIS compliance
    • Cloud solutions
    Checked October 24, 2026

  • ANC Group

    Greenville, SC Managed IT

    Says it serves small, mid-sized, large and enterprise businesses across many industries, including healthcare, legal, manufacturing and government.

    • Managed IT services and 24/7 monitoring
    • Data backup and disaster recovery
    • IT consulting and audits
    • Cloud hosting and migration
    • Managed cybersecurity and penetration testing
    Checked October 24, 2026

  • AT-NET Services

    Greenville, SC Managed IT

    Says it guides small and medium-size businesses, with pages for larger companies, across industries including manufacturing, banking, construction and government.

    • IT help desk
    • Network monitoring and management
    • Backup and disaster recovery
    • vCIO services
    • Managed SOC and MDR
    Checked October 24, 2026

  • A.T. Locke

    Greenville, SC CPA and accounting
    • Management accounting
    • Financial analysis
    • Financial reporting and projections
    Checked October 24, 2026

  • Argo and Associates, LLP

    Anderson, SC CPA and accounting
    • Back-office accounting
    • Business advisory
    • Accounting services and financial statements
    • Tax advisory and tax management
    • Payroll and compensation planning
    Checked October 24, 2026

  • Arthurs & Company CPA, LLC

    Greenville, SC CPA and accounting

    Says it works with business owners, executives and independent professionals.

    • Small business accounting
    • Payroll
    • Part-time CFO services
    • Audits, reviews and compilations
    • Business valuation
    Checked October 24, 2026

Run an Upstate firm that belongs here?

Basic listings are free. Tell us who you are and we will check you the same way we checked everyone else.

Get listed