19 Best IT Support Companies for Accounting Firms (2026)

Gilzor provides software development, technical troubleshooting, application maintenance, cloud and DevOps support, and ongoing product support. Its services are particularly relevant to accounting firms that rely on custom web applications, client portals, internal business systems, or integrations that need ongoing technical attention. The company can also take over existing software projects and address performance, reliability, security, and infrastructure issues. Its current offices include Warsaw, Poland, and Limassol, Cyprus. 

Verito focuses heavily on technology for tax and accounting organizations. Its IT support covers accounting software environments, cloud hosting, enterprise security, and managed IT services. The company specifically supports platforms such as Drake, Lacerte, UltraTax, and QuickBooks, making its service model relevant to firms that want IT specialists familiar with accounting workflows rather than a general-purpose help desk. 

Network Management Group, Inc. (NMGI) has a dedicated focus on CPA firms and accounting technology. Its managed IT offering includes proactive monitoring, maintenance, help desk support, cybersecurity, backups, disaster recovery, network management, and cloud desktops. NMGI also works with CCH Axcess, Thomson Reuters products, Lacerte, QuickBooks, and other platforms used by accounting practices. 

Tabush Group provides managed IT and cloud services for professional service firms, including accounting practices. Its accounting-focused services cover daily IT support, cloud hosting, cybersecurity, and technology management. The company also offers co-managed IT for firms that already maintain an internal IT function. 

Net-devs provides enterprise software engineering, cloud and platform engineering, modernization, and fintech development. Its enterprise work covers .NET, JVM, Node, Python, and Go, while its cloud capabilities include Azure, AWS, GCP, Terraform, and Kubernetes. The fintech practice focuses on regulated, high-reliability software, making the company relevant to accounting organizations that need custom enterprise systems, integrations, or modernization rather than standard desktop support.

Andersen provides managed IT services for accounting firms, including help desk support, cybersecurity, cloud and infrastructure management, and compliance-oriented IT services. Its accounting practice offering is designed around the operational demands of CPA and accounting organizations, including the need for reliable systems during tax season and protection of financial information.

A-listware offers multi-level IT support covering help desk assistance, infrastructure management, cloud services, application support, monitoring, cybersecurity, and technical consulting. Its service model ranges from Level 1 user support to Level 3 engineering assistance. The company lists FinTech, banking, insurance, investment, and professional services among the industries it supports, which makes its broader IT capabilities relevant to accounting organizations.

ITSco provides managed IT, cybersecurity, compliance, cloud, and strategic technology services for CPA, tax, and advisory firms. Its accounting practice offering includes proactive monitoring, help desk and infrastructure management, 24/7 security operations, managed detection and response, backup and disaster recovery, and compliance support around IRS Publication 4557 and the GLBA Safeguards Rule. 

OSKI Solutions develops custom software for financial and accounting-related use cases, including tailored financial systems, reporting platforms, integrations, and business applications. Its capabilities are relevant when an accounting firm needs technology built around its specific workflows rather than relying solely on off-the-shelf accounting software.

Petronella Technology Group delivers managed IT and cybersecurity services specifically for accounting firms. Its offering includes 24/7 monitoring, help desk support, cloud hosting for QuickBooks and tax applications, backup and disaster recovery, email security, WISP development, risk assessments, and tax-season capacity planning. 

Whole Technology provides accounting-specific IT services covering cloud desktops, accounting application support, cybersecurity, Microsoft 365, help desk services, workflow automation, and disaster recovery. Its team supports applications such as UltraTax and QuickBooks and can coordinate directly with software vendors when technical problems cross application, server, network, or cloud boundaries. 

21century.tech provides custom software engineering across web and mobile applications, integrations, refactoring, and technology consulting. Its work can support accounting businesses that need custom internal tools, client-facing applications, integrations, or modernization of existing software. The company uses AI-assisted development while keeping architecture, code review, and delivery decisions under senior engineering oversight.

The NetSys Group provides managed IT and cybersecurity services to accounting and CPA practices. Its accounting offering includes identity security, email protection, endpoint detection and response, 24/7 monitoring, backups, secure document exchange, and security planning. The company also provides cloud, disaster recovery, Microsoft 365, and co-managed IT services. 

Royer Networks focuses on compliance-driven IT and cybersecurity for financial firms, including CPA firms, accounting practices, tax offices, and bookkeeping companies. Its services cover managed IT, Microsoft 365 and cloud management, secure file sharing, endpoint protection, compliance advisory, backups, and business continuity. 

Itexus develops financial software for regulated financial products and complex enterprise environments. Its services include software support and maintenance, DevOps and cloud engineering, cybersecurity and compliance, quality assurance, and custom fintech development. For accounting firms, the most relevant capabilities are ongoing support for financial systems, integrations, secure cloud infrastructure, and custom software that handles financial data and workflows.

Core Managed IT Services has a dedicated accounting-firm offering focused on keeping technology available during busy periods and managing the infrastructure behind accounting workflows. Its services address remote access, servers, VPNs, terminal servers, QuickBooks, Sage, payroll integrations, cybersecurity, and IT planning. 

VirtuWorks provides managed IT support for accounting and CPA firms, with an emphasis on system stability, data protection, cybersecurity, and compliance. Its services include proactive monitoring, maintenance, MFA, threat detection, managed IT, and co-managed IT for firms that have some internal technology resources. 

Tera Partners provides managed IT services specifically for accounting firms that need consistent support across business applications, infrastructure, vendors, security, and day-to-day operations. Its approach combines managed IT with infrastructure management, security services, backup and disaster recovery, and vCIO consulting. 

SoftPro provides custom software development, web application development, cloud development, AI, and ongoing support. Its services are relevant to accounting firms that need custom internal applications, finance-related portals, workflow systems, or long-term maintenance rather than conventional managed desktop support. Its case portfolio includes a CRM platform combining project, HR, and finance management.