What Hubble does

Hubble Inc. (株式会社Hubble), founded in 2016 by Hayakawa Shinpei in Tokyo, is an AI-driven contract lifecycle management (CLM) cloud platform serving Japanese enterprises, mid-market companies, and startups. The platform covers the full contract workflow — drafting, review request routing, collaborative editing, approval workflows, version control, post-execution management, renewal/deadline tracking, and regulatory compliance — and is anchored by the Contract Flow Agent (CFA), an AI agent that proactively recommends next actions across the contract lifecycle. The technology stack is built on Microsoft Azure OpenAI Service (with contractual guarantees that customer data is not used for model training), augmented by OCR for paper contracts, Japanese-language NLP, and patent-protected case management logic. Hubble holds dual JIIMA certifications for Japan's Electronic Books Storage Law and ISMS (ISO/IEC 27001) certification, and integrates natively with Slack, Microsoft Teams, Adobe Acrobat Sign, Cloud Sign, and SAML SSO providers (Google Workspace, Microsoft 365).

The product portfolio spans two core tiers — the full Hubble platform for enterprise and mid-market customers and Hubble mini as a lighter entry point for SMBs and startups — plus the OneNDA consortium platform for NDA standardization and the Legal Ops Lab content media for thought leadership. Revenue is generated through annual subscription pricing on a sales-led basis for the full platform, with a product-led self-serve motion for Hubble mini and optional paid add-on AI features (Custom Item AI Auto-Input). The company has raised approximately ¥2.95 billion+ across disclosed funding rounds, including a ¥650M Series A in April 2022 led by DNX Ventures and a ¥2.3B Series B in October 2025 led by Vertex Ventures Southeast Asia & India, and reports 1,000+ cumulative customers with a 99% renewal rate as of mid-2026. Named enterprise customers include SoftBank, Panasonic, Nikon, Otsuka Group, Sapporo Beer, TOHO Cinemas, and Wacoal Holdings, alongside a long tail of mid-market and startup adopters such as SmartHR, Money Forward, and SmartRound. Distribution is Japan-only through direct enterprise sales and self-serve product-led channels, with no disclosed international go-to-market operations.

Name

Hubble

Legal name

株式会社Hubble

Website

https://hubble-docs.com

Company type

Private

Founded year

2016

Operating status

Operating

Headcount range

11–50 employees

Short description

Hubble is a Tokyo-based AI contract lifecycle management cloud platform serving Japanese enterprises, mid-market firms, and startups. It offers full-cycle contract drafting, review, approval, and post-execution management powered by Azure OpenAI, serving 1,000+ customers with 99% retention.

Ownership category

akta.pro rank

Product category

Contract Management Software

NAICS

Software Publishers (513210), Software Publishers (5132)

SIC

Services-Prepackaged Software (7372), Services-Computer Programming, Data Processing, Etc. (7370)

akta.pro primary industry

Cloud Compliance, Audit & Continuous Controls Monitoring (CCM/GRC) (HDABAHAI)

akta.pro secondary industry

Workplace Technology & Smart Office Support (Room Booking Systems, IT/AV Liaison) (IMAIALAK)

Keywords

• Contract lifecycle management
• AI contract review
• Legal tech cloud
• Contract management software
• Electronic contract compliance

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. Hubble (Full Platform) Subscription: Hubble offers a full contract lifecycle management platform on a subscription basis. The service covers contract creation, review request management, collaborative editing, approval workflows, post-execution management, AI-powered metadata extraction, and compliance features. Pricing is tiered based on company size/usage scope with annual billing.
2. Hubble mini Subscription: Hubble mini provides a lighter-weight entry point focused specifically on post-execution contract management and AI-powered contract database creation. Available at a lower price point, it serves SMBs and startups with a path to upgrade to the full Hubble platform. The two-product strategy enables land-and-expand motion.
3. Custom AI Features (Optional Add-on): Custom Item AI Auto-Input is explicitly described as an optional paid feature. Enterprise customers can configure custom extraction prompts for industry-specific or company-specific data fields, creating upsell opportunities from base platform subscriptions.

Pricing tiers

Go-to-market motion3 records

Distribution channels3 records

Marketing channels9 records

Core offering

Hubble is a Japan-based AI contract management cloud platform that supports the full contract lifecycle — drafting, review requests, collaborative editing, approval workflows, and post-execution management — in a shared workspace. It uses generative AI built on Microsoft Azure OpenAI Service to extract metadata, build contract databases from uploaded PDFs, identify lease accounting treatment, track renewal deadlines, and provide an autonomous Contract Flow Agent that recommends next actions. The platform targets enterprise legal and business departments, with a lighter entry-tier product (Hubble mini) for startups and SMBs.

Product overview

Hubble provides an AI-powered contract lifecycle management platform centered on two core products: the full-featured Hubble platform (Hubble) and the entry-tier document management service (Hubble mini). Hubble covers contract drafting, review, approval, version control, and post-execution management with deep AI capabilities, while Hubble mini is a lighter, upload-only service for organizations starting contract digitization. Both are backed by the Contract Flow Agent (CFA) AI module, which autonomously guides contract workflows. Hubble also operates OneNDA (an NDA standardization platform) and Legal Ops Lab (a legal operations content media). The platform integrates natively with Slack, Microsoft Teams, Adobe Acrobat Sign, and supports SAML SSO via Google Workspace and Microsoft 365.

Differentiator

Problem solved

Functional benefit

Brands

• Hubble mini: Contract document management cloud service - AI-powered system that automatically creates contract databases by analyzing uploaded PDFs, with renewal deadline tracking and AI-powered information organization.
• Contract Flow Agent
• OneNDA
• Legal Ops Lab

Products and services

• Hubble (Main Platform) AI contract lifecycle management cloud service covering contract drafting, review requests, collaborative editing, approval workflows, and post-execution management. Integrates AI review, version control, Slack/Teams communication, lease accounting support, and customizable custom-AI fields. Targets legal and business department collaboration in Japanese enterprises.
• Hubble mini Contract document management cloud focused on post-execution management. Users upload executed contract PDFs (or paper contracts via OCR) and AI automatically creates a comprehensive management ledger including counterparty, renewal terms, dates, and amounts. Supports renewal deadline notifications, flexible permission settings, and JIIMA-certified electronic records law compliance. Targeted at startups and SMBs seeking a lower entry point into contract digitization, with an upgrade path to the full Hubble platform.
• Contract Flow Agent (CFA)

Named customers20 records

Ideal customer profiles3 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration5 records

AI capability9 records

Feature13 records

Partnerships

Six partnerships are on record, tiered core and minor.

• AdobecoreTechnology or Integration · 22 May 2026Hubble's native integration with Adobe Acrobat Sign enables automatic import of executed contracts upon signing, creating a seamless end-to-end workflow from contract execution to post-signature management. This eliminates manual upload steps and ensures the contract database remains current automatically.
• Cloud Sign (クラウドサイン)coreTechnology or IntegrationDeep integration with Cloud Sign, one of Japan's most widely used e-signature platforms. Enables automatic import of executed contracts from Cloud Sign into Hubble's management system, eliminating manual data entry and ensuring real-time contract database updates.
• SlackcoreTechnology or IntegrationHubble offers both Slack channel integration (for team-wide notifications) and Slack DM integration (for individual notifications with bidirectional reply capability). Enables legal teams to receive contract review notifications, approval requests, and deadline alerts directly in Slack. Business departments can initiate contract review requests from Slack.
• Microsoft TeamscoreTechnology or IntegrationHubble supports Microsoft Teams integration, enabling users to reply to contract comments and add reactions directly from within Teams without navigating to the Hubble platform. Completes the communication loop for organizations using Microsoft 365 as their primary collaboration environment.
• Microsoft Azure OpenAI ServicecoreTechnology or IntegrationHubble's AI features are powered by Microsoft Azure OpenAI Service, with explicit contractual guarantees that customer data is never used for AI model training. This infrastructure choice is a key differentiator for enterprise security-conscious buyers and enables the company's 'no data training' value proposition.
• Google for Startups (Accelerator)minorGTM or Marketing PartnerHubble participated in the Google for Startups Accelerator Class 4 program in 2022, gaining access to Google's resources, mentorship, and cloud credits. Early-stage accelerator participation helped establish credibility in the tech/startup ecosystem.

Scale indicators7 records

Recent moves6 records

Expansion highlights6 records

Direct peers

• LegalForce: Japanese AI contract review and management platform offering similar drafting, review, and approval workflows. LegalForce is the most direct domestic competitor to Hubble in AI-driven contract review, competing for the same Japanese enterprise legal department buyers.
• MNTSQ: Japanese legal tech company applying NLP/AI to contract review and knowledge management for enterprise legal teams. MNTSQ competes head-to-head with Hubble for legal department budget and is built on similar AI-first architecture for contract analysis.

Broad incumbents

• Money Forward (Cloud Sign): Major Japanese SaaS provider of cloud accounting and back-office software, which acquired Cloud Sign (one of Japan's leading e-signature platforms). Money Forward is both an investor in Hubble and a competitor via its bundled contract/finance offerings, targeting the same enterprise accounts.
• Bengo4.com: Japanese legal tech operator of Cloud Sign and other legal services. Bengo4.com is a broader legal platform player with significant reach into Japanese enterprises and competes with Hubble in the contract execution and management workflow.
• DocuSign: Global leader in e-signature and contract lifecycle management (CLM). DocuSign is a broad incumbent operating in Japan with e-signature and CLM capabilities, providing both competition and a partnership reference point for Hubble's deeper AI-driven workflow features.
• Adobe (Acrobat Sign): Adobe's document cloud includes Acrobat Sign (e-signature) and broader PDF/contract capabilities. Adobe is both an integration partner of Hubble (native Adobe Acrobat Sign integration announced May 2026) and a broad incumbent competitor for enterprise document workflows.
• Icertis: Global enterprise CLM platform with AI-powered contract intelligence. Icertis competes with Hubble for multinational enterprise CLM deals and provides a benchmark for the scale and depth Hubble may need to reach as it pursues its stated 'global growth' roadmap.

Regional players

• Infomart: Japanese B2B platform for electronic contracts, e-invoices, and document management. Infomart is a domestic competitor focusing on transaction document digitization with broader scope than Hubble, competing particularly on the post-execution / archive side of contract management.
• AI inside: Japanese AI platform providing OCR, document intelligence, and AI services including contract-related automation. AI inside is a domestic AI infrastructure player that both enables similar AI capabilities and competes as an alternative platform for document intelligence workflows.

Emerging players

• Evisort: AI-native contract management and analytics platform built on proprietary NLP models. Evisort is an emerging player with deep AI contract analysis capabilities that overlaps with Hubble's Contract Flow Agent positioning, particularly for English-language and cross-border deployments.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat6 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xx.com/HubbleDocs
• Facebookfacebook.com/hubble.team

Compliance3 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles4 records

Funding overview

Funding rounds7 records

Investors17 records

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 Hubble