BILLION / AI COMPANY
AI, BUILT FOR THE REAL WORLD

Turn AI capability
into business progress.

From our products to business systems, from working prototypes to daily use. Turn ideas into lasting tools for real work.

Products・Capability, built to last

Each product starts with a real need at work.

01 / 04
01 / AIRouter

Connect models and business

MODEL → ROUTE → WORKFLOW
02 / FDE

Keep context flowing

DOCUMENT → CONTEXT → ACTION
03 / VPN

Clarity for connections and usage

ROUTE → CONNECT → MANAGE
04 / Amail

Your domain. Your team’s mail.

DOMAIN → MAILBOX → WORKFLOW

Solutions・See it first. Then build it together.

Use AI across discovery, design, implementation and testing. Align on a working prototype, agree the scope, then validate and deliver in stages.

01

Business systems

Turn sales, inventory, CRM and approval workflows into useful systems.

Sales · Inventory · Workflows02

Knowledge & automation

Make internal knowledge searchable and simplify document input, meeting notes and system integration.

Knowledge search · OCR · Integration03

Legacy modernization

Understand existing code and business rules, recover design knowledge and plan incremental migration.

Analysis · Design recovery · Migration04

New products & MVPs

Turn ideas into working prototypes, use feedback to define scope, then deliver in stages.

Prototype · Validation · Delivery

Start with one thing you want to change.

FLOW・From consultation to delivery

  1. Initial consultation

    Discuss the problem, desired outcomes and how we can work together.

    Confirm consultation notes

  2. Requirements discovery

    Map workflows, essential features and priorities to define the project boundaries.

    Agree requirements and scope

  3. Working prototype

    Try a working prototype and align on the direction through hands-on feedback.

    See it before deciding

  4. Proposal and estimate

    Agree deliverables, costs, schedule and acceptance criteria before implementation.

    Confirm proposal and engagement terms

  5. Build and milestone reviews

    Review working results at each milestone, confirm changes and assess agreed criteria.

    Record results, changes and acceptance

  6. Delivery and ongoing support

    Hand over deliverables and guidance after acceptance, with support within the agreed scope.

    Confirm handover and support arrangements

WHY BILLION

AI speed. Financial-grade quality.

AI is a tool that dramatically accelerates implementation and testing. But deciding what to build, reviewing code and taking responsibility for quality remain human work.

Since our founding in 2005, we have continued to build banking and credit card systems where downtime is unacceptable. We deliver at AI speed while maintaining those same quality standards.

About us

ビリオン株式会社

Address：〒406-0003 山梨県笛吹市桑田9番地17

Established：April 2005

Capital：JPY 61,500,000