Gosugi LLC builds software people use together.
Gosugi is a software-as-a-service (SaaS) company. We design, build, and operate mobile-first web applications delivered over the internet — no installs, no infrastructure for you to manage. Our first product, ThatOneTime, turns a chaotic group trip into one shared, living guide everyone can see in real time.
What we do
We build and run subscription-based web software — the whole lifecycle, from product design through hosting, security, and ongoing support. Every product we ship follows the same principles.
Cloud-delivered
Our applications run in the cloud and are delivered through the browser as Progressive Web Apps — installable to the home screen, with no app store or download required.
Real-time & collaborative
The software we build is made for groups. Edits made on one device appear instantly on every other — a single, live source of truth instead of scattered messages and screenshots.
Private by default
User data stays gated to the people it belongs to. We collect only what a feature needs to work and give people clear control over what they share.
Our product
Gosugi's first SaaS product is ThatOneTime — a real-time shared trip and event guide.
A mobile-first, real-time shared guide for group trips and events. Open it on every phone, edit the plan together, and watch it sync live — the itinerary, curated places, a booking checklist, a shared photo album, and an end-of-trip recap, all in one place.
- Live, always-current plan on every traveler's phone
- Installable Progressive Web App — no app store
- Private trips with revocable read-only share links
Get in touch
Questions about Gosugi or our products? We'd love to hear from you.