Chatwork Wins #1 Overall in 'ITreview The Best Software in Japan 2026'
Chatwork, the business chat tool provided by kubell Inc., has ranked #1 overall in the 'ITreview The Best Software in Japan 2026' awards. Chosen based on user reviews, the ranking recognized Chatwork for its intuitive interface and its contribution to faster communication and improved operational efficiency.
📋 Article Processing Timeline
- 📰 Published: May 22, 2026 at 00:07
- 🔍 Collected: May 21, 2026 at 15:31
- 🤖 AI Analyzed: May 21, 2026 at 15:37 (5 min after Collected)
kubell Inc. (Headquarters: Minato-ku, Tokyo; CEO: Masaki Yamamoto) is pleased to announce that its business chat tool, 'Chatwork,' has achieved the #1 overall spot in the 'ITreview The Best Software in Japan 2026,' an annual ranking published by ITreview, one of Japan's largest IT product review sites.
About 'ITreview The Best Software in Japan 2026'
'ITreview The Best Software in Japan 2026' is a ranking that selects IT tools and SaaS products that have garnered significant support during the year based on user reviews submitted to ITreview. ITreview is a review site that hosts over 15,000 products and approximately 158,000 reviews.
For the 2026 edition, products that received 20 or more user reviews between April 2025 and March 2026 were eligible. The top 100 products were selected based on a total score calculated from the number of reviews, user satisfaction, site traffic, the frequency of comparisons, and citations by generative AI.
Evaluation of 'Chatwork'
Chatwork earned the #1 overall position. Amidst a wide variety of product categories including business software, generative AI, and design tools, Chatwork was highly valued for its ability to consolidate internal and external communication—which was previously email-centric—into a single chat interface. This has significantly improved response speeds and operational efficiency. Users also highly appreciated that it can be used intuitively, even by those unfamiliar with IT tools. We sincerely thank our users for their continued support, which made this achievement possible.
About 'Chatwork'
Chatwork is one of Japan's largest business chat tools, boasting over 989,000 corporate clients and 8.094 million registered IDs as of the end of March 2026. Designed to streamline communication in business settings, it features chat, task management, file management, and video/voice calling functionalities. It enables smooth communication not only internally but also with external partners. Even in remote work environments, it facilitates casual and speedy conversations compared to traditional email and telephone, thereby supporting organizational efficiency and productivity.
About kubell Inc.
With a corporate mission of 'Making work more enjoyable and creative,' kubell Inc. (formerly Chatwork Co., Ltd.) operates 'Chatwork,' one of Japan's largest business chat tools that is easy for anyone to use and connects easily with external users. The company also provides a wide range of BPaaS services, such as 'Takushita,' which allows for the outsourcing of various back-office tasks like accounting, human resources, and general affairs via chat. Transitioning from a business chat company to a platform company changing how 'work' is done through BPaaS, the company changed its name to kubell Inc. on July 1, 2024.
About 'ITreview The Best Software in Japan 2026'
'ITreview The Best Software in Japan 2026' is a ranking that selects IT tools and SaaS products that have garnered significant support during the year based on user reviews submitted to ITreview. ITreview is a review site that hosts over 15,000 products and approximately 158,000 reviews.
For the 2026 edition, products that received 20 or more user reviews between April 2025 and March 2026 were eligible. The top 100 products were selected based on a total score calculated from the number of reviews, user satisfaction, site traffic, the frequency of comparisons, and citations by generative AI.
Evaluation of 'Chatwork'
Chatwork earned the #1 overall position. Amidst a wide variety of product categories including business software, generative AI, and design tools, Chatwork was highly valued for its ability to consolidate internal and external communication—which was previously email-centric—into a single chat interface. This has significantly improved response speeds and operational efficiency. Users also highly appreciated that it can be used intuitively, even by those unfamiliar with IT tools. We sincerely thank our users for their continued support, which made this achievement possible.
About 'Chatwork'
Chatwork is one of Japan's largest business chat tools, boasting over 989,000 corporate clients and 8.094 million registered IDs as of the end of March 2026. Designed to streamline communication in business settings, it features chat, task management, file management, and video/voice calling functionalities. It enables smooth communication not only internally but also with external partners. Even in remote work environments, it facilitates casual and speedy conversations compared to traditional email and telephone, thereby supporting organizational efficiency and productivity.
About kubell Inc.
With a corporate mission of 'Making work more enjoyable and creative,' kubell Inc. (formerly Chatwork Co., Ltd.) operates 'Chatwork,' one of Japan's largest business chat tools that is easy for anyone to use and connects easily with external users. The company also provides a wide range of BPaaS services, such as 'Takushita,' which allows for the outsourcing of various back-office tasks like accounting, human resources, and general affairs via chat. Transitioning from a business chat company to a platform company changing how 'work' is done through BPaaS, the company changed its name to kubell Inc. on July 1, 2024.
FAQ
How many registered IDs does Chatwork have?
As of the end of March 2026, it has 8.094 million registered IDs.
What award did Chatwork win?
It ranked first overall in the 'ITreview The Best Software in Japan 2026' hosted by the IT review site ITreview.
Who operates Chatwork?
It is operated by kubell Inc., a company dedicated to making work more enjoyable and creative.