The archive · AI & Models · Strategic decision · 2025
Giselle: ROUTE06's OSS AI-builder bet — #2 on Product Hunt launch day
Japanese engineering firm ROUTE06 open-sourced its visual AI app builder Giselle and launched globally on Product Hunt — 505 upvotes, #2 of the day.
ROUTE06 (株式会社ROUTE06)
What the business is
Giselle is ROUTE06's open-source visual AI app builder: drag-and-drop nodes create workflows that combine GPT, Claude and Gemini models, run long tasks with progress tracking, and trigger on GitHub events.
How it started
Takafumi Endo founded ROUTE06 in Tokyo in January 2020 with Hitoshi Matsumoto and Tadashi Shigeoka, after careers that included founding e-commerce firm Smarby and serving as CPO/CMO of STRIPE DEPARTMENT. The company built enterprise systems at roughly half to a third of traditional SIer cost, then hit the services bottleneck: growth depended on scarce senior engineers. That pushed it to productize — first requirements-design platform Acsim (pre-release April 2025, general availability July 2025, about 30 customers by October) and then the AI app builder Giselle.
What happened
ROUTE06 says Giselle was born after staff requested 'an AI tool that non-engineers can use intuitively,' and the team began using it in daily work. On December 29, 2025 the company released it worldwide as open source under Apache License 2.0, alongside a cloud service (Free with 30 AI-minutes per month; Pro at $20/month) and free self-hosting. The same day it ran a 24-hour Product Hunt launch that finished at #2 Product of the Day with 505 upvotes and 139 comments.
How it ended up
Still running as of early 2026: open-source code and cloud service live, with an announced roadmap of API/MCP support, sandboxing and Slack/Google Workspace integrations.
Background
Giselle is an open-source visual AI app builder from ROUTE06, a Tokyo engineering startup founded in January 2020. Users drag and drop nodes to combine models from OpenAI, Anthropic and Google in one workflow, run hours-long AI tasks in a separate execution environment with real-time progress tracking, and trigger automation from GitHub issues and pull requests. It was released worldwide under Apache License 2.0 on December 29, 2025, with a cloud service offering Free and $20/month Pro tiers.
The product came out of ROUTE06's own services bottleneck. The firm grew by building enterprise systems cheaper and faster than Japanese system integrators, but scaling required senior engineers it could not hire fast enough, so it began productizing its expertise with Acsim for requirements definition and Giselle for building AI apps. Staff inside the company had asked for an AI tool non-engineers could use, and ROUTE06 says it built Giselle for itself and runs daily work on it.
ROUTE06 chose a global, community-led route to market rather than its usual enterprise sales channel: Apache-2.0 open source, a public GitHub repository, and a Product Hunt launch on December 29, 2025. Giselle finished that launch at #2 Product of the Day with 505 upvotes and 139 comments. The bet is that democratizing AI orchestration — making it visual, runnable and composable across models — wins adoption faster than selling to Japanese enterprises one project at a time.
What has to be true
- ROUTE06's consulting growth model was capped by how many senior engineers it could hire, so tools had to carry the expertise.
- Open-sourcing under Apache 2.0 removes security and procurement objections for enterprises while inviting community contribution.
- A Product Hunt launch gave a Japanese B2B firm instant global developer attention it had no other channel to reach.
- Multi-model composition and GitHub-native automation differentiate Giselle from generic no-code builders aimed at business users.
What can be applied
When senior talent is the bottleneck, productize the expertise; when buyers are global developers, an open-source launch can beat an enterprise sales motion.
Aftermath
As of 2026-01-02, Giselle is live as free self-hosted open source plus a cloud service (Free with 30 AI-minutes per month; Pro $20/month), having finished its launch day at #2 Product of the Day with 505 upvotes and 139 comments. ROUTE06's stated roadmap includes API provision and MCP support for built applications, secure sandbox execution, Slack and Google Workspace integrations, more languages and regions, enterprise-grade security, and advanced multi-agent features. No funding round or customer/adoption numbers for Giselle had been published by that date.
Sources
- Giselle正式リリース、ドラッグ&ドロップでAIアプリを構築できるオープンソースプラットフォームが登場
- ドラッグ&ドロップでAIアプリを構築！ 『Giselle』がオープンソースで正式リリース
- Giselle - Build and run AI workflows. Open source. | Product Hunt Launch Dashboard
- 日本のSI市場を変革するROUTE06が挑む、誰もが要件定義を作れる未来へ
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