Stratum PEO is an HR and payroll platform for PEOs, ASOs, domestic EORs, staffing agencies, and CPA firms that administer payroll for clients. It runs entirely on a customer’s own infrastructure. Its design uses 16 FastAPI microservices behind one API gateway, with Next.js frontends and independently deployable modules. The in-house tax engine supports federal, state, and local withholding across all 50 states and D.C., multi-state allocation, and NACHA ACH export. HR workflows include employee and client onboarding checklists with assisted I-9 extraction and E-Verify, plus offboarding notices covering 21 states. Case management, SLA tracking, escalation rules, AI-assisted case triage, call logging, and sales CRM are included. Connectors include BambooHR, Greenhouse, Lever, QuickBooks Online, Xero, Slack, Deputy, and Clockify. Annual plans range from CPA channel Starter at 9000.00 USD per year to ASO Established at 27000.00 USD per year. Implementation and support are listed at $150/hr.
Who it is for
It suits PEOs, ASOs, domestic EORs, staffing agencies, and CPA firms managing payroll for clients. Its self-hosted deployment is for organizations that want the platform on their own infrastructure.
What is good
- Tax withholding covers all 50 states and D.C.
- Supports multi-state allocation and NACHA ACH export.
- Modules can be deployed independently.
- Includes onboarding, offboarding, and case-management workflows.
- Lists native connectors for accounting, HR, and workforce tools.
What to know first
- No free plan is listed.
- Self-hosted deployment requires customer infrastructure.
- Implementation and support are listed at $150/hr.
- Formal SOC 2 certification engagement is planned, not completed.
Verdict
Stratum PEO combines client payroll, HR workflows, and CRM tools in a self-hosted platform. Its annual plans vary by customer type and scale, while implementation and support are separately listed at $150/hr.
Stratum PEO plans and pricing
All plansCompared on PEO software
- Free plan
- No
- Client company portal
- Yes
- Payroll and tax admin
- Yes
- Benefits enrollment
- Yes
- Compliance tools
- Yes
- Employee self-service
- Yes
- HR onboarding
- Yes