合同会社on flow is a Japanese software development company positioned around the planning and development of web services and applications. The core products shown in the crawled content are not general-purpose development frameworks, but a suite of services focused on measuring internet connection quality: the speed test and comparison site “みんなのネット回線速度”, the connection review and comparison service “みんなの回線口コミ”, and the PC-only ping measurement app “haru ping”.
“みんなのネット回線速度” focuses on comparing connection speeds based on historical speed test results. The text mentions more than 7 million measurement results, along with features such as one-click stability/speed checks, provider detection, ping measurement across multiple regions, and simultaneous IPv4/IPv6 measurement for fiber connections. “haru ping” is more oriented toward personal troubleshooting, using charts and historical records to track ping changes and help identify when latency occurs, with separate support for IPv4 and IPv6 measurements. From a developer-tool perspective, the public information does not specify supported languages, frameworks, APIs, SDKs, open-source licensing, or self-hosted deployment capabilities.
The page does not disclose pricing models, paid plans, or payment methods, so it is not possible to assess personal, enterprise, or commercial licensing options. In terms of ecosystem, the text says on flow was responsible for development related to the speed test system for ニフティ株式会社’s “ネット回線スピードテスト” and has obtained a patent related to connection-quality measurement methods. This suggests a certain level of project experience in Japan’s internet speed testing space. However, standardized integrations, documentation quality, and technical support channels are not reflected in the provided text.
Its strengths are a focused product direction, coverage of speed testing, user reviews, ping history analysis, IPv4/IPv6 capabilities, and a large pool of historical speed test data. The downside is the lack of developer-facing information: there is no visible API documentation, SDK, self-hosting option, or open-source information, making it difficult to evaluate as an embeddable development platform. It is better suited to users in Japan who want to compare internet connections or troubleshoot latency, as well as companies looking for a partner to develop speed test systems.
The crawled text does not provide information about access from mainland China, payment support, or network availability, so these remain unknown. For international speed testing or self-hosted options, alternatives to consider include Speedtest by Ookla, Fast.com, Cloudflare Speed Test, PingPlotter, and LibreSpeed.
⚠ This review is compiled from public sources and does not constitute a purchase recommendation. Verify all facts on the vendor's official site. Verify on onflow.co.jp official site.
onflow.co.jp is an Japan Dev Tools provider. TG4G tracks its product information, an overall rating of 6.0/10, and a China-accessibility score of Workable. Click "Visit Official Site" to reach onflow.co.jp directly.