Tandium

What Tandium does

Tandium (legal entity TANDIUM, Inc.) is a Maryland-based Professional Employer Organization (PEO) and Administrative Service Organization (ASO) founded in 1990, providing outsourced human resources, payroll, benefits, workers compensation, 401k, training and recruiting, and risk management services primarily to small and medium-sized businesses and non-profit organizations across the Mid-Atlantic United States. The firm operates two distinct service delivery models: a PEO model in which Tandium becomes the co-employer and employer of record handling payroll taxes and benefits administration, and an ASO model in which the client retains employer-of-record status under its own tax ID while outsourcing administrative functions. The core technology stack is the third-party PrismHR platform, which powers separate client and employee self-service portals (ori.prismhr.com and ori-ep.prismhr.com) for payroll processing, benefits enrollment, time and attendance, and HR data access, supplemented by web-based virtual HR training modules. Tandium's go-to-market is consultative direct sales targeting SMB owners (CEOs and Presidents), with referral-driven growth from existing clients, content marketing through a blog and social channels, and SEO-optimized educational resources; the firm displays 40+ carrier and financial partner logos (AmWins, Reliance Standard, LegalShield, Sandy Spring Bank, PNC, FinFit, Humanity/TimeCo, Crimcheck, among others) evidencing a broad benefits purchasing and value-add ecosystem.

Revenue is generated primarily through per-employee administrative fees scaled to client census, billed monthly under custom service agreements, with supplementary revenue from HR consulting engagements (audits, handbook review, retention consulting). The firm is privately held and independently operated with no disclosed outside investment, M&A activity, or parent company, and is led by President Susan Manno (who also serves as Director of Legal Compliance). Tandium is a member of NAPEO, the PEO industry's national trade association. No AI/ML capabilities, proprietary technology, or data products are disclosed; differentiation rests on personalized service delivery, multi-state HR expertise, and group purchasing leverage on benefits rather than technology.

Name

Tandium

Legal name

TANDIUM, Inc.

Website

https://tandium.com

Company type

Private

Founded year

1990

Operating status

Operating

Headcount range

11–50 employees

Short description

Tandium is a Maryland-based PEO and ASO founded in 1990 that provides outsourced payroll, benefits, HR, workers compensation, 401k, and recruiting services to small and medium-sized businesses and non-profits across the Mid-Atlantic United States.

Ownership category

akta.pro rank

Product category

HR Outsourcing / Professional Employer Organization (PEO) Services

NAICS

Professional Employer Organizations (561330), Professional Employer Organizations (56133)

SIC

Services-Employment Agencies (7361)

akta.pro primary industry

Professional Employer Organization (PEO) / Co-Employment Services (BPACAHAB)

akta.pro secondary industry

Onboarding, Offboarding & Employee Lifecycle Administration (BPACAHAL)

Keywords

• Professional employer organization
• HR outsourcing services
• Payroll administration
• Employee benefits administration
• Workers compensation management

Headquarters

HQ city

Millersville

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Technology or R&D, Marketing or Sales, Infrastructure

Revenue model

1. PEO Administrative Services: Per-employee administrative fees based on census. The PEO becomes the employer of record and charges a fee for payroll processing, benefits administration, HR compliance, and risk management services. Rate is determined through assessment of client company needs.
2. ASO (Administrative Service Organization): Similar to PEO but without co-employment arrangement. Client retains ownership of employees under their tax ID. Services include HR solutions, payroll, forms, risk management, compliance, 401k, benefits auditing and payment, and workers compensation administration.
3. HR Consulting Services: Consulting services including HR audits, employee handbook review and rebuilds, training and recruiting, and employee retention consulting

Pricing tiers

Go-to-market motion1 record

Distribution channels2 records

Marketing channels4 records

Core offering

Tandium is a Professional Employer Organization (PEO) and Administrative Service Organization (ASO) that provides outsourced HR, payroll, employee benefits (health, dental, vision, 401k), workers compensation, training, recruiting, employee retention consulting, and business insurance services to small and medium-sized businesses. Under the PEO model, Tandium acts as the employer of record; under the ASO model, it administers HR functions while the client retains employment ownership.

Product overview

Tandium is a Professional Employer Organization (PEO) and Administrative Service Organization (ASO) providing comprehensive HR solutions to small and medium-sized businesses. The company offers a portfolio of integrated services including Payroll Administration, Employee Benefits, Human Resources Services, Training & Recruiting, Employee Retention, and Business Services. Service delivery operates through two models: PEO (co-employer relationship with Tandium as employer of record) and ASO (client retains employment ownership with Tandium handling administration). These core services are supported by technology features including a web-based HR data access portal, Time & Attendance tracking, and Virtual HR Training modules. The company leverages over 30 years of experience serving businesses and non-profit organizations with customized HR, payroll, and benefits programs.

Differentiator

Problem solved

Functional benefit

Products and services

• Payroll Administration

Quantifiable outcome

• PEO clients grow 7-9% faster than comparable businesses
• +5 more outcomes

Named customers2 records

Segments2 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature3 records

Partnerships

Five partnerships are on record, tiered core and minor.

• PrismHRcoreTechnology or IntegrationTechnology platform provider for client and employee login portals. Used for processing payroll, benefits enrollment, time and attendance, and HR administration. Two separate PrismHR portals referenced: one for client login (ori.prismhr.com) and one for employee login (ori-ep.prismhr.com).
• AmWinsminorChannel Partner/ Reseller/ DistributorInsurance benefits broker providing access to comprehensive insurance products and benefits packages for Tandium clients. Featured partner in benefits administration section.
• LegalShieldminorChannel Partner/ Reseller/ DistributorLegal services benefit provider offering identity theft protection and legal services plans as part of employee benefits package.
• Reliance StandardminorChannel Partner/ Reseller/ DistributorLife and disability insurance provider offering employee benefit products through Tandium's PEO services.
• NAPEO (National Association of Professional Employer Organizations)coreStrategic or Co-development PartnerIndustry association membership providing access to resources, legislative updates, professional development, and industry best practices. Multiple blog posts reference NAPEO statistics and whitepapers.

Scale indicators3 records

Recent moves1 record

Expansion highlights5 records

Direct peers

• Insperity: Insperity is a publicly-traded PEO providing co-employment HR, payroll, benefits, and worker's comp administration to SMBs. Like Tandium, Insperity targets growing small and midsize businesses that lack in-house HR, making it the most direct comparable on service model and customer segment.
• TriNet: TriNet is a leading PEO serving small and medium-sized businesses with bundled HR, payroll, benefits, and compliance services. Its SMB focus and PEO+ASO approach directly mirror Tandium's value proposition and customer profile.
• Justworks: Justworks provides PEO-style HR, payroll, benefits, and compliance services to small businesses with a technology-led model. While larger and more tech-forward, it competes for the same SMB-buyer profile and similar service bundle as Tandium.
• Sequoia (Asure): Sequoia, now part of Asure, is a PEO serving SMBs with HR, payroll, benefits, and retirement services. It is comparable to Tandium in target customer and PEO service model, though larger and with broader technology offerings.
• CoAdvantage: CoAdvantage is a PEO providing HR outsourcing, payroll, benefits, worker's compensation, and compliance to small and midmarket employers. It is a comparable mid-size PEO competitor to Tandium in the SMB segment.
• BBSI: BBSI (Barrett Business Services) operates a PEO providing payroll, benefits, worker's compensation, and HR consulting to SMBs, often with a regional focus. As a comparable mid-size PEO, BBSI is a relevant benchmark for Tandium's service mix and growth profile.
• G&A Partners: G&A Partners is a PEO offering HR, payroll, benefits administration, and risk management to small and midsize businesses. Its bundled PEO service model and SMB focus closely parallel Tandium's offering.

Broad incumbents

• Paychex PEO: Paychex is a large payroll and HR solutions provider whose PEO/ASO services compete head-on with Tandium for SMB HR outsourcing relationships. Paychex has substantially greater scale, technology investment, and product breadth than Tandium, but overlaps directly on PEO, payroll, and benefits administration.
• ADP TotalSource: ADP TotalSource is the PEO division of ADP, one of the largest HR/payroll incumbents. It offers full PEO co-employment, benefits, and compliance services to SMBs in direct competition with Tandium, with materially broader technology and geographic reach.

Regional players

• ExtensisHR: ExtensisHR is a mid-size PEO with strong East Coast/Mid-Atlantic presence providing PEO and HR outsourcing to SMBs. Geographically and in scale it is among the closest regional analogs to Tandium.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks5 records

Key highlights6 records

Customer concentration

• Xx.com/tandiumhr
• YouTubeyoutube.com/channel/UCa2SKPMB9aNo58oTEMtM2jg
• Facebookfacebook.com/tandium
• LinkedInlinkedin.com/company/tandium-co

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Tandium