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14,448 startups · 29 programs

Coasts

Inactive · Localhost service isolation and orchestration for git worktrees

WebsiteYC profile

Why it ranks

How the rank works
2signal of 100 · rising 1
  • went through YCProgram · this site+4
  • team of 2Team size · YC's directory+2.5

A sum of public facts, not a judgement and not investment advice.

Competitors

AITesserShared: development runtime, run multiple, coding agentYC W27Startup →AIboxdShared: fully isolated, agent, developerAntler 2025NetherlandsStartup →AIConductorShared: coding agent, isolated, parallelYC S24San FranciscoStartup →
Companies closest to Coasts
Company
TesserShared: development runtime, run multiple, coding agentYC W27ActiveAI, Devtools
boxdShared: fully isolated, agent, developerAntler 2025Not statedAI
ConductorShared: coding agent, isolated, parallelYC S24ActiveAI, Devtools

Adjacent

AIDesignbaseShared: web development, designYC W23RemoteStartup →AIRepaintShared: web development, design, codingYC S23San FranciscoStartup →OtherAwesomicShared: web development, design, projectYC S21San FranciscoStartup →AIStably AI (Orca)Shared: coding agent, web development, letYC W22San FranciscoStartup →Developer toolsInactiveKivoShared: productivity, git, workYC S13San FranciscoStartup →
Companies next to Coasts
Company
DesignbaseShared: web development, designYC W23ActiveAI, Devtools
RepaintShared: web development, design, codingYC S23ActiveAI, Devtools
AwesomicShared: web development, design, projectYC S21ActiveOther
Stably AI (Orca)Shared: coding agent, web development, letYC W22ActiveAI, Devtools
KivoShared: productivity, git, workYC S13InactiveDevtools

Also from F25 in AI

All of F25
AIRadiusCode and browse in the same placeYC F25San FranciscoStartup →AIAirCaps AIVoice AI that hears what other models miss.YC F25San FranciscoStartup →AICompyleThe coding agent that actually collaborates with youYC F25San FranciscoStartup →AICrunchedExcel AI analyst for Power UsersYC F25OsloStartup →AIdari.devThe Routing Layer for AI AgentsYC F25San FranciscoStartup →AIFastshotLovable for mobile appsYC F25ThessalonikiStartup →
Company
RadiusCode and browse in the same placeteam of 2ActiveAI, Devtools
AirCaps AIVoice AI that hears what other models miss.team of 5hiringActiveAI, Devtools
CompyleThe coding agent that actually collaborates with youteam of 2ActiveAI, Devtools
CrunchedExcel AI analyst for Power Usersteam of 5ActiveAI, Data
dari.devThe Routing Layer for AI Agentsteam of 2ActiveAI, Devtools
FastshotLovable for mobile appsteam of 3ActiveAI, Devtools

Founders

  • Jamie SunderlandFounder/CEO
  • Dan HymanFounder/CTO

About Coasts

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.

YC batch
F25 · Fall 2025
Status, per YC
Inactive
Category
AI, Developer tools
Team size
2
Founded
2025
Checked
6h ago

YC tags: Developer Tools, B2B, Productivity, Design, Web Development

Coasts in F25: 146 companies, 88% AI

GitHub

Coasts: questions

Which YC batch was Coasts in?

Coasts was in Y Combinator's Fall 2025 batch (F25).

Is Coasts still active?

Y Combinator lists Coasts as inactive.

Who founded Coasts?

Coasts's founders, as listed on its YC page: Jamie Sunderland (Founder/CEO), Dan Hyman (Founder/CTO).