About Seisei
Integrated Business Management for SMBs
Seisei provides integrated business management systems for small and medium businesses. We combine POS, accounting, inventory management, and multi-store operations in one unified platform, reducing system fragmentation and duplicate data entry. From the moment a transaction occurs, your data is ready for analysis, reconciliation, and management.
We believe SMBs don't lack effort—they lack systems that can keep up with their business pace. Seisei's goal is to enable owners, store managers, accountants, and external partners (such as accounting firms and tax advisors) to collaborate on the same data, rather than transferring information between multiple software systems.
Problems We Solve
Fragmented Business Data
POS, inventory, reconciliation, and bookkeeping scattered across different tools with inconsistent standards. Books don't match, requiring month-end corrections.
High Manual Entry Costs
Orders, refunds, discounts, costs, and inventory changes aren't automatically captured. Finance and stores repeatedly verify data, leading to inefficiency and errors.
Unclear Permission Boundaries
Different roles need access to different data scopes, but traditional systems struggle to achieve "collaboration with separation."
Core Capabilities
Built around the "Transaction → Inventory → Accounting → Reports" workflow, Seisei continuously develops and improves:
POS System
More efficient and stable high-frequency frontline operations.
Accounting System
Easier transaction reconciliation and report generation. Reduced month-end closing pressure.
Inventory Management
Unified standards for stock movements and costs. Data-driven gross margin and replenishment decisions.
Multi-Store Management
Centralized data and permissions across stores. Balance headquarters oversight with store autonomy.
Open Integration
API + documentation for external system connections and automation extensions.
Industries We Serve
Seisei is designed for SMBs centered on "store transactions," particularly suited for:
Food & Beverage
High-frequency transactions with strong daily closing and reconciliation needs.
Retail
Many SKUs, large inventory fluctuations, high gross margin management requirements.
Service & Beauty
Services and products coexist; repeat business and membership operations are crucial.
Our Approach
Transaction as the Source
Capture data where business happens, reducing after-the-fact bookkeeping corrections.
Process as the Framework
Standardized processes preserve institutional knowledge, ensuring operations continue regardless of staff changes.
Permissions as Boundaries
Fine-grained control over "what can be done, what can be seen" to match your actual organizational structure.
Get Started with Seisei
30-day free trial to experience the convenience of integrated business management