What Atomic Software does

Atomic Software (アトミックソフトウェア株式会社), formerly Medical Force Inc., is a multi-vertical SaaS company headquartered in Tokyo, Japan, founded in November 2020. The company builds and operates vertical software products for industries it characterizes as DX-underserved. Its primary product is medicalforce, a SaaS solution for clinics, with a 31-person engineering team and a multi-year operating history. In 2026 the company launched Keibi Force, a SaaS product for security guard companies, supported by a 6-person engineering team, formalizing a multi-vertical strategy. The company's reported engineering approach is built on a proprietary "Atomic Software Doctrine" modular architecture framework designed to enable reusable product development across verticals. AI tooling is integrated into engineering workflows (Cursor, Claude Code, Greptile, NotionAI).

The business sells subscription SaaS directly to mid-market and SMB customers in healthcare and security guard services in Japan. It monetizes through per-customer recurring contracts; specific pricing, contract values, and revenue figures are not disclosed. The company is registered at approximately 1.995 billion JPY in capital, indicative of cumulative funding from Japanese SaaS-focused investors including ALL STAR SAAS FUND and GLOBIS CAPITAL PARTNERS, each of which has placed a partner on the board. The CEO is Shoichi Hatanaka (畠中 翔一), with the CTO and COO roles filled separately. The company holds ISO/IEC 27001:2022 certification for information security and operates a Tokyo headquarters plus a 2026-established Osaka West Japan branch, indicating early geographic expansion beyond the Kanto region.

Name

Atomic Software

Legal name

アトミックソフトウェア株式会社

Website

https://atomic-software.co.jp

Company type

Private

Founded year

2020

Operating status

Operating

Short description

Atomic Software (アトミックソフトウェア株式会社) is a Tokyo-based multi-vertical SaaS company, founded 2020, that operates medicalforce for clinics and Keibi Force for security guard companies in Japan, funded by Japanese SaaS-focused VCs.

Ownership category

akta.pro rank

Headquarters

HQ city

Tokyo

HQ country

Japan

HQ region

Asia

Offices2 records

Markets served

GTM type

B2B

Offering type

Software

Cost components

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

Revenue model

1. SaaS Subscriptions (medicalforce & 警備フォース): Recurring subscription revenue from cloud-based all-in-one SaaS platforms. medicalforce serves clinic management; 警備フォース serves security companies. Revenue model is subscription-based with per-seat or tiered pricing for SMB and mid-market customers in Japan.

Pricing tiers

Go-to-market motion2 records

Distribution channels2 records

Marketing channels6 records

Core offering

Atomic Software develops and sells vertical SaaS platforms — medicalforce for medical clinic management and 警備フォース (Keibi Force) for security company operations. Both products are all-in-one cloud platforms that consolidate scheduling, payroll, billing, dispatch management, and records into a single unified system for SMB and mid-market businesses in Japan, built on a modular "Atomic Software Doctrine" architecture enabling rapid tailoring to industry-specific workflows.

Product overview

Atomic Software operates as a multi-vertical SaaS company offering industry-specific all-in-one platforms. The company provides two core products: medicalforce for medical clinic management and 警備フォース (Keibi Force) for security company operations. Both products follow the company's 'Atomic Software Thought' philosophy, where business processes are decomposed into modular components that can be flexibly combined to provide optimized solutions for specific industries.

Differentiator

Problem solved

Functional benefit

Brands

• medicalforce: Clinic management all-in-one SaaS for the medical domain. A unified management platform for clinics covering business and operational efficiency.
• 警備フォース (Keibi Force)

Products and services

• medicalforce

Quantifiable outcome

• Development productivity enhanced through AI-assisted development tools (Cursor, Claude Code, Greptile, NotionAI) with company-provided usage subsidies

Named customers2 records

Segments2 records

Ideal customer profiles2 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature3 records

Partnerships

One partnership is on record.

• きのこカンファレンス実行委員会minorOthers · 13 April 2026The Kinoko Conference (きのこカンファレンス2026) is an engineering-focused technical conference held at the Japan Science Future Museum. Atomic Software engineer Kusunoki Teruhiko is speaking at the conference. The partnership involves a speaker/participation arrangement.

Scale indicators2 records

Recent moves8 records

Expansion highlights5 records

Emerging players

• KING OF TIME: KING OF TIME is a focused time-and-attendance SaaS for Japanese SMBs, with adjacent payroll offerings. It is comparable as a specialized, vertical-leaning SaaS that competes for the same operational software budget as medicalforce and Keibi Force.

Broad incumbents

• Sansan: Sansan operates a broad business cloud platform (business cards, contracts, invoicing) for Japanese enterprises. It overlaps with Atomic Software in B2B SaaS for Japanese SMB but at much larger scale and with a wider portfolio.
• Cybozu: Cybozu's Kintone is a dominant low-code business application platform in Japan. It competes for the same IT budget at Japanese SMBs that Atomic Software targets, but via a horizontal platform rather than vertical SaaS.
• Yayoi Holdings: Yayoi is a long-standing Japanese SMB accounting and payroll software provider transitioning to cloud SaaS. Comparable as an established Japanese vertical SaaS incumbent for SMB operations, with deep customer base.

Direct peers

• Money Forward: Money Forward operates a multi-product SaaS suite targeting Japanese SMB and consumer finance, payroll, and back-office workflows. Comparable to Atomic Software in its product breadth and SMB focus, with a much larger headcount and capital base.
• SmartHR: SmartHR is a vertical SaaS leader in Japan for HR and labor-management, sold primarily via sales-led motion to mid-market and SMB. It shares Atomic Software's pattern of owning a single high-value operational workflow in a Japanese SMB vertical.
• freee K.K. freee is a leading Japanese SaaS company offering cloud-based all-in-one platforms for SMB back-office functions (accounting, HR, payroll). It is the closest analog to Atomic Software's multi-vertical SaaS strategy applied to Japanese SMBs.
• RAKUS: RAKUS provides Japanese SMB SaaS for expense management (Rakuraku Seisan), invoice handling (Rakuraku Meisai), and e-commerce. Comparable in business model (Japanese B2B SaaS for SMB back-office) and sales-led GTM.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights6 records

Customer concentration

• Xx.com/medicalforce_co

Compliance1 record

Revenue estimate

Valuation estimate

Number of profiles

Profiles7 records

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 Atomic Software