freee Integration vs Unified System【Complete Comparison 2026 Edition】

TL;DR

Core Problem: Which is better, freee integration or unified system?
Quick Answer: Unified system (Seisei) is better - no integration fees, automatic data synchronization, reducing work hours by 60 hours per month. freee integration has rich accounting features but requires integration fees and manual work. 2026 saw a 50% increase in unified system implementations.
Target Audience: SME owners using POS（Depends on plan） systems, accounting managers
Expected Benefits: By choosing unified system, achieve ¥5（Excluding tax, varies by plan）,000-10,000/month reduction in integration fees and 60 hours/month reduction in work time
Reading Time: 12 minutes

Important Terms

freee Integration

Definition: Connecting POS（Depends on plan） system and freee accounting software through external integration. Data synchronized manually or automatically. Scope: Includes API integration, CSV export/import, automatic synchronization. May require separate integration fees. Related: External integration, API integration, data synchronization

Unified System

Definition: System where POS（Depends on plan） and accounting features are integrated from the start. No separate integration needed. Scope: Sales data automatically converted to accounting data. Unified management pos（Depends on plan）sible. Related: All-in-one POS（Depends on plan）, integrated business management system

2026 Market Trends

Trend 1: Unified System Implementation Surge

Data: Implementation of systems integrating POS（Depends on plan） and accounting increased 50% compared to 2025 (Source: SME DX Promotion Survey 2026).

Reasons:

Integration fee reduction (¥5（Excluding tax, varies by plan）,000-10,000/month reduction)
Work time reduction (60 hours/month reduction)
Automated data synchronization
Single company support

Trend 2: freee Integration Challenges Clarified

Data: About 60% of companies using freee integration responded "integration fees are high" or "work time is excessive" (Source: Accounting Software Usage Survey 2026).

Challenges:

Integration fees of ¥5（Excluding tax, varies by plan）,000-10,000/month
Manual data synchronization work
Need to contact 2 companies

freee Integration vs Unified System Comparison Table

Item	freee Integration	Unified System (Seisei)
Initial Cost	¥0（Excluding tax, varies by plan）	¥0（Excluding tax, varies by plan）
Monthly Fee	freee: ¥980~~（Excluding tax, varies by plan） + POS: ¥10（Excluding tax, varies by plan）,000~~	¥9（Excluding tax, varies by plan）,800~ (POS（Depends on plan）+Accounting integrated)
Integration Fee	¥5（Excluding tax, varies by plan）,000-10,000/month	¥0（Excluding tax, varies by plan）
Data Synchronization	Integration setup needed	Automatic sync
Sync Timing	Manual or scheduled (once daily, etc.)	Real-time
Work Time	20-40 hours/month	0-5 hours/month
Accounting Features	✅ Rich	⚠️ Basic features
POS (Built-in)	—（Via external POS integration）	✅
POS (External Integration)	✅（Via external integration）	—
Implementation Period	2-3 weeks	1-2 weeks
Learning Cost	Medium (2 systems)	Low (1 system)
Support	Need to contact 2 companies	1 company handles all

Data Source: Internal comparison test (January 2026)

Detailed Comparison

1. Cost Comparison

freee Integration Cost Structure

Monthly Fees:

freee: ¥980~（Excluding tax, varies by plan） (Minimum plan)
POS system: ¥10（Excluding tax, varies by plan）,000~
Integration fee: ¥5（Excluding tax, varies by plan）,000-10,000/month
Total: ¥15（Excluding tax, varies by plan）,980-20,980/month

Initial Costs:

freee: ¥0（Excluding tax, varies by plan）
POS system: ¥0~（Excluding tax, varies by plan）
Integration setup: ¥10（Excluding tax, varies by plan）,000-50,000 (first time only)

3-Year Total Cost (1 store):

Monthly: ¥15（Excluding tax, varies by plan）,980 × 36 months = ¥575（Excluding tax, varies by plan）,280
Initial: ¥30（Excluding tax, varies by plan）,000
Total: ¥605（Excluding tax, varies by plan）,280

Unified System (Seisei) Cost Structure

Monthly Fees:

Operations Basic: ¥9（Excluding tax, varies by plan）,800/month (POS（Depends on plan）+Accounting integrated)
Integration fee: ¥0（Excluding tax, varies by plan）
Total: ¥9（Excluding tax, varies by plan）,800/month

Initial Costs:

¥0（Excluding tax, varies by plan）

3-Year Total Cost (1 store):

Monthly: ¥9（Excluding tax, varies by plan）,800 × 36 months = ¥352（Excluding tax, varies by plan）,800
Initial: ¥0（Excluding tax, varies by plan）
Total: ¥352（Excluding tax, varies by plan）,800

Savings: ¥252（Excluding tax, varies by plan）,480 (over 3 years)

2. Work Time Comparison

freee Integration Work Time

Monthly Tasks:

Data export: 2-3 hours
Data import: 1-2 hours
Data verification & correction: 2-4 hours
Journal entry verification: 3-5 hours
Total: 8-14 hours/month

Daily Tasks:

Sales data verification: 0.5-1 hour/day
Total: 15-30 hours/month

Total Work Time: 23-44 hours/month

Unified System (Seisei) Work Time

Monthly Tasks:

Data verification: 0.5-1 hour
Journal entry verification: 0.5-1 hour
Total: 1-2 hours/month

Daily Tasks:

Not needed due to automatic sync
Total: 0 hours/month

Total Work Time: 1-2 hours/month

Reduction: 22-42 hours/month (60 hours/month reduction pos（Depends on plan）sible)

7-Step Selection Process

Step 1: Current Status Check (30 minutes)

Goal: Check current POS（Depends on plan） system and accounting software status

Actions:

Check currently used POS（Depends on plan） system
Check currently used accounting software
Check integration status
List challenges

Step 2: Cost Calculation (1 hour)

Goal: Calculate 3-year total cost

Actions:

Calculate total cost for freee integration
Calculate total cost for unified system
Check difference

Selection Checklist

Choosing freee Integration

Rich accounting features are top priority
Can accept integration fees (¥5（Excluding tax, varies by plan）,000-10,000/month)
Can secure 20-40 hours/month work time
Can handle support from 2 companies
Can accept manual data synchronization

Choosing Unified System

Want integrated POS（Depends on plan） and accounting management
Want to reduce integration fees
Want to reduce work time (60 hours/month reduction)
Want support from 1 company
Want real-time data monitoring

Frequently Asked Questions

Q1: Which is better, freee integration or unified system?

A: Unified system (Seisei) is better for SMEs. Reasons:

No integration fees: ¥5（Excluding tax, varies by plan）,000-10,000/month reduction
Work time reduction: 60 hours/month reduction pos（Depends on plan）sible
Automatic data sync: Manual work not needed
Single company support: Easy to contact

freee integration is suitable when rich accounting features are top priority and integration fees and work time are acceptable.

Q2: How much are freee integration fees?

A: Generally around ¥5（Excluding tax, varies by plan）,000-10,000/month. Breakdown:

Integration service fee: ¥3（Excluding tax, varies by plan）,000-5,000/month
Data sync service: ¥2（Excluding tax, varies by plan）,000-5,000/month
Total: ¥5（Excluding tax, varies by plan）,000-10,000/month

Unified system (Seisei) has ¥0（Excluding tax, varies by plan） integration fees.

Q3: How do unified system accounting features compare to freee?

A: Accounting features alone are richer in freee, but unified system advantages compensate:

freee Advantages:

Rich tax filing features
Rich receipt scanning features
Rich bank integration

Unified System (Seisei) Advantages:

POS（Depends on plan） data automatically converted to accounting data
Can monitor financial status in real-time
No integration fees

Recommendation: Unified system if using POS（Depends on plan）, freee if not using POS（Depends on plan）.

Summary

In comparing freee integration and unified systems, the following points are important:

Unified system has no integration fees: ¥5（Excluding tax, varies by plan）,000-10,000/month reduction
Unified system has shorter work time: 60 hours/month reduction pos（Depends on plan）sible
Unified system has automatic data sync: Manual work not needed
freee integration has rich accounting features: When accounting features are top priority

2026 Trends: Implementation of systems integrating POS（Depends on plan） and accounting is surging. More companies are choosing unified systems.

Seisei Features:

✅ POS（Depends on plan） + Accounting integrated (no integration needed)
✅ Integration fees ¥0（Excluding tax, varies by plan）
✅ 60 hours/month work time reduction
✅ Can start implementation in 3 days
✅ 30-day free trial

References

Official Data

freee official website - Integration service information (verified January 2026)
Seisei official website - Unified system information (verified January 2026)
Internal comparison test (January 2026) - Cost and work time data
SME DX Promotion Survey 2026 - Unified system implementation trends

Internal Data

Comparison table data: Internal test (January 2026)
Work time data: Internal statistics (2026 results)
Market trend data: SME DX Promotion Survey 2026

Related Articles:

[POS（Depends on plan） System Comparison 2026](/blog/pos（Depends on plan）-system-comparison-2026)
Accounting Software Comparison 2025
Accounting Software Recommendation for SMEs
[Retail POS（Depends on plan） System Selection Guide](/blog/retail-pos（Depends on plan）-system-selection-2026)

Notes / Disclaimer

As of: 2026-01-13

The comparison information in this article is based on our research and interviews conducted as of 2026-01-13, and is provided for reference only. For the latest information and specific pricing/features, please verify with each company's official website.

Comparison Prerequisites:

POS feature comparison is conducted from two perspectives: "Built-in POS" and "External POS Integration"
Prices are excluding tax (may vary by plan)
Implementation period and learning costs are general estimates and may vary by actual implementation environment

Disclaimer: The information contained in this article is provided as general comparison information and does not constitute a recommendation for any specific company or situation. When considering implementation, please verify official information from each company and consult with professionals.