Developer tools

Coasts

Website
Founded 2025Origin source ↗Checked 2026-09-15

Overview

A Coast (containerized host) is a local development runtime. Coasts let you run multiple isolated environments for the same project on one machine. As AI coding agents increasingly work in parallel across git worktrees, developers hit painful conflicts — clashing ports, duplicated databases, and fragile per-branch setup. Coasts solve this by giving each worktree its own fully isolated runtime, so multiple agents can build and test side by side without stepping on each other.

Company description As recorded 2026-11-08
GitHub
Developer toolsInfrastructureDevelopersDevelopersSubscription

Founders & team

Previously JSX Tool

Company history As recorded 2026-11-08

Jamie Sunderland

Founder/CEO

Second time YC founder. Former YC Product Engineer (I made the YC investor CRM). I like weird front end things a lot. In a former life I started Cheqout (YC W21), a QR-based ordering platform that grew to over 250 restaurants and $30M GMV during the pandemic. Before that I was a developer on Airbnb's China Risk Team.

LinkedIn
Founder profile As recorded 2026-09-15

Dan Hyman

Founder/CTO

Senior Engineer and Cloud/AWS expert with experience leading teams building enterprise applications and infrastructure. In a past life, I was a chef at a James Beard award winning restaurant.

LinkedIn
Founder profile As recorded 2026-09-15
2team members reported
Source-reported As recorded 2026-09-15

Founded 2025 · Source

News & product activity

Sources & observations

Y Combinator

Profile depthenriched profile
Website observationwebsite reachable
Last website check2026-11-11
Location · source statedNot documented
Pricing evidenceNo pricing page confirmed
Maturity: Not assessed · 3 of 6 areas documented

Source-based assessment · automated evidence rules

The source reports an inactive or acquired company; current product identity needs review.

Maturity is an evidence-based assessment, not a success rating. It may understate the current stage where evidence is limited. Coverage records documented areas, not a complete or independently audited company history.

Stage definitions
independent websitesource corroborationreachable websitedescriptive evidenceclassified market and modelsourced peoplesourced founding yeardocumentation observed
startup.observe Directory coverage · Sources & method