Onebox

What Onebox does

Onebox株式会社 is a Tokyo-based AI DX SaaS startup founded in March 2020 by Representative Director 奥村恒太, with its headquarters in Shibuya, Tokyo. The company operates a portfolio of products under three business lines: AI DX SaaS (yaritori メール共有, a shared inbox and inquiry management system; yaritori AI, an AI email agent add-on; and yaritori メール配信, a bulk email delivery tool), AI DX Support (yaritori アシスト, a hybrid AI-plus-human operator outsourcing service), and AI DX Media (FUKUROU, a credit card comparison media platform in both corporate and personal variants). Its core technology stacks GPT-4/GPT-4o with a RAG architecture and multi-agent coordination (history search, summarization, and reply drafting agents) layered with proprietary features including Japanese-context complaint detection, automated translation, and tone/manner customization, all integrated natively with Gmail (core) and Outlook (secondary), with full SPF/DKIM/DMARC compliance for sender reputation.

The company sells yaritori primarily on a subscription SaaS basis with a free trial and quote-based annual pricing, targeting SMB and mid-market Japanese companies — particularly customer support and sales inquiry workflows handling high email volumes. Distribution is product-led and self-serve through the company website, supplemented by content marketing (corporate blog, Note community), events (Startup Market 2026), and partner co-marketing (e.g., Helpfeel seminar, January 2024). Named customers include Asahi Shimbun, Raksul, UPSIDER, and Nishikawa, with the platform used by 250+ companies as of the most recent disclosure.

Onebox has raised approximately ¥80M (~$540K) in cumulative funding across three rounds (October 2020 seed from Apricot Ventures; April 2022 from ANOBAKA and Apricot Ventures; June 2022 from Coconala Skill Partners). Revenue is not publicly disclosed, and no further funding rounds have been reported since June 2022, despite accelerating product investment through 2024–2025 across AI features, bulk delivery, and a new media business line.

Name

Onebox

Legal name

Onebox株式会社

Website

https://onebox.tokyo

Company type

Private

Founded year

2020

Operating status

Operating

Headcount range

51–100 employees

Short description

Onebox株式会社 is a Tokyo-based AI DX SaaS startup operating yaritori, an AI-powered shared inbox and inquiry management platform with a GPT-4o-based multi-agent email agent, serving 250+ Japanese SMB and mid-market companies across support, sales, and marketing email workflows.

Ownership category

akta.pro rank

Product category

Email Management and AI Customer Support Software

NAICS

Software Publishers (5132)

SIC

Services-Prepackaged Software (7372)

akta.pro primary industry

Enterprise Case Management & Request Fulfillment Platforms (HDAEALAJ)

Keywords

• Email management software
• AI email automation
• Shared inbox platform
• Customer inquiry management
• B2B SaaS platform

Headquarters

HQ city

Tokyo

HQ country

Japan

HQ region

Asia

Offices1 record

Markets served

GTM type

B2B

Offering type

Software

Cost components

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

Revenue model

1. yaritori (subscription SaaS): Monthly or annual subscription fees for the yaritori email management SaaS platform, sold on a per-seat or tiered plan basis. Customers access the platform via web browser with integrations into Gmail and Outlook.
2. yaritori AI Assistant (human + AI agents): AI agent and human operator services layered on top of the base platform, providing automated and assisted email handling. Likely bundled with or upsold from the base subscription.
3. FUKUROU (business credit card comparison media): Referral and affiliate revenue from the FUKUROU business credit card comparison platform, monetizing business financial product referrals.

Pricing tiers

Go-to-market motion3 records

Distribution channels2 records

Marketing channels6 records

Core offering

Onebox sells yaritori, a cloud-based B2B SaaS platform for shared email inbox management and AI-driven email operations, enabling teams to collaborate on representative mailboxes, draft responses via GPT-4-powered AI agents, detect complaints, translate messages, and automate bulk email delivery. The company supplements the SaaS with FUKUROU comparison media for corporate and personal credit cards, monetized via affiliate referrals, and a yaritori アシスト hybrid AI-plus-human assistant service for outsourced non-core operations.

Product overview

Onebox operates an integrated portfolio of AI DX services organized under three business lines. The core platform is yaritori (AI DX SaaS), which encompasses yaritori メール共有 as the foundational shared-inbox product, yaritori AI as an RAG- and multi-agent-powered add-on module for autonomous email handling, and yaritori メール配信 for bulk email campaigns. yaritori アシスト supplements the platform with a hybrid AI-and-human assistant service for non-core business process outsourcing. Under AI DX Media, the FUKUROU sub-brand provides comparison media for corporate (FUKUROU 法人カード) and personal (FUKUROU 個人カード) credit card selection. The portfolio spans shared email management, AI-driven automation, delivery infrastructure, operational support, and media content.

Differentiator

Problem solved

Functional benefit

Brands

• yaritori: メール共有・問い合わせ管理システム。代表メールの対応状況をチーム内で可視化し、複数人でのメール対応を爆速化することができる。
• yaritori メール共有
• yaritori メール配信
• yaritori アシスト
• FUKUROU 法人カード
• FUKUROU 個人カード
• yaritori AI

Products and services

• yaritori メール共有 (yaritori Shared Inbox) Cloud-based email shared inbox and inquiry management system for teams. Multiple members share representative addresses (e.g., support@), visualize response status in real time, assign tasks, and prevent duplicate replies. Integrates with Gmail and Outlook via one-click sync.
• yaritori AI (AI Email Agent) Autonomous AI email agent that references past email history, company FAQs, and product manuals via RAG to draft contextually appropriate email responses. Supports tone, manner, persona, and NG-word customization, and offers a hybrid human-monitoring model for quality control. Sold as a premium add-on to yaritori customers.
• yaritori メール配信 (yaritori Bulk Email Delivery) Bulk email delivery system with GPT-4-assisted copy generation, recipient list management, and one-click unsubscribe to support Gmail-compliant mass communications for marketing and operational use cases.
• yaritori アシスト (yaritori Assistant) Online assistant service that pairs AI agents with specialist human operators to improve business processes and outsource non-core operations, including customer support, sales operations, and marketing tasks.
• FUKUROU 法人カード (FUKUROU Corporate Credit Card) Comparison media platform that evaluates corporate and business credit cards to help small-to-medium enterprises improve cash-flow efficiency and accounting operations; monetized via affiliate referrals.
• FUKUROU 個人カード (FUKUROU Personal Credit Card) Comparison media platform that analyzes credit card point redemption rates and supplementary benefits to recommend optimal personal card options aligned with individual lifestyle and financial goals; monetized via affiliate referrals.

Named customers4 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

Integration5 records

AI capability5 records

Feature4 records

Partnerships

Two partnerships are on record, tiered minor and core.

• HelpfeelminorGTM or Marketing Partner · 1 January 2024Helpfeel and Onebox co-hosted an online seminar (January 2024) to share knowledge on AI-powered customer operations and email automation, demonstrating a marketing collaboration to educate the Japanese BtoB market.
• GmailcoreTechnology or IntegrationPrimary email platform integration. yaritori integrates directly with Gmail and supports Gmail's sender authentication standards (SPF, DKIM, DMARC), making Gmail a core platform on which the product operates.

Scale indicators3 records

Recent moves6 records

Expansion highlights5 records

Direct peers

• Front: Front is a shared email inbox and team collaboration platform that lets teams manage email, SMS, and chat from a single workspace. It is the closest direct peer to yaritori's shared-inbox and inquiry management functionality, with a similar target buyer in mid-market customer support and sales operations.
• Help Scout: Help Scout provides shared inboxes, help docs, and AI-assisted customer support tools for SMB and mid-market companies. It competes directly with yaritori in email-based customer support workflows and has overlapping use cases around inquiry triage and team-based response handling.
• Hiver: Hiver turns Gmail into a collaborative customer support hub with shared labels, assignments, and analytics. It is a direct peer to yaritori given the shared Gmail-centric positioning, similar SMB/mid-market focus, and parallel shared-inbox + automation feature set.
• SaneBox: SaneBox offers AI-powered email management and prioritization layered on top of Gmail and Outlook. It is a direct peer to yaritori's AI email automation features, particularly for individual and small-team use cases, with overlapping positioning on reducing email overload.

Broad incumbents

• Zendesk: Zendesk is a broad customer service and support platform with email ticketing, AI bots, and workforce management. As a larger incumbent serving a wide range of customer service use cases, it competes with yaritori for enterprise email support spend while offering far broader capabilities.
• Intercom: Intercom provides an AI-first customer service platform combining chat, email, help center, and Fin AI agent. It is a broad incumbent with overlapping AI-driven email response capabilities that compete with yaritori AI for inbound inquiry automation budgets.
• Freshworks: Freshworks offers Freshdesk and other customer experience products that include shared inboxes, AI agents (Freddy AI), and ticketing for SMB and mid-market customers. It competes with yaritori for the same Japanese and global SMB/mid-market segments at greater scale and brand recognition.

Emerging players

• Kustomer: Kustomer is an AI-native CRM and customer service platform focused on unified customer views and AI-driven automation. It is an emerging peer to yaritori with overlap in AI-augmented email handling and case management, though with a stronger enterprise tilt.
• Helpfeel: Helpfeel is a Japanese AI-powered knowledge base and search tool that partners with Onebox on webinars. It addresses a related but distinct problem (knowledge retrieval vs. email automation), making it an emerging ecosystem peer with potential bundle opportunities rather than a direct competitor.

Regional players

• Chatwork: Chatwork is a leading Japanese business messaging platform with growing workflow and AI capabilities. As a Japan-headquartered player with overlapping customer base and integration with yaritori, it is a regional peer that competes for the same Japanese SMB IT budget.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat5 records

Key risks6 records

Key highlights6 records

Customer concentration

Revenue estimate

Valuation estimate

Number of profiles

Profiles2 records

Funding overview

Funding rounds1 record

Investors1 record

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 Onebox