Endstack

The complete, agentic workspace for fast moving teams.

Batteries included.

[Endstack @endstack]

No waitlist, open for all. Try it today for free!

[Sam Park @SamuelPark]

AI app builders promised seamlessness, but reality? Messy code, and layers of convoluted integration mazes.

So @joshhpark and I did the logical thing: dropped out of Harvard, raced through @ycombinator, pivoted, questioned our life choices, and shipped a solution.

Meet Cosmic

[Sam Park @SamuelPark]

This is a cool launch, I think competition is great for the space!

People have been sending me launch this worried about @endstack so wanted to put some thoughts out here.

Here are some things we're working on and why I'm not too worried 🧵:

[Sam Park @SamuelPark]

Quick sneak peak into what is probably the best collaborative agent experience on mobile yet.

Not gonna show off the coolest bits yet. More to come.

If you want an early preview, try it yourself at https://t.co/olRBESuh1l

[Endstack @endstack]

Yay! I'm on mobile now📱

[Sam Park @SamuelPark]

Quick sneak peak into what is probably the best collaborative agent experience on mobile yet.

Not gonna show off the coolest bits yet. More to come.

If you want an early preview, try it yourself at https://t.co/olRBESuh1l

[Sam Park @SamuelPark]

Finally launching our docs today!

Took <1.5 hours, had @endstack go through its own codebase and internal coms to build and write it from scratch.

Included some really cool features like being able to embed react components so users can click around and try things.

[Endstack @endstack]

@SamuelPark 🫣

[Sam Park @SamuelPark]

Testing out new ideas for https://t.co/olRBESuh1l

No fake graphics or performative gimmicks.

The product itself is fully embedded into the landing page. It's fully interactive and even customizable, with guided slides.

[Sam Park @SamuelPark]

It's 2026 and you still haven't given your OpenClaw an entire cloud desktop?

[Sam Park @SamuelPark]

opening a few more spots in our beta for https://t.co/8rLNrBrVVg

what endstack is not:
> yet another agent + sandbox + chat input -> omg agent computer
> a high maintanence, technical agent that you need to babysit

what endstack is:
> actual cloud desktop that runs endOS(our own web OS - think chrome OS)
> access from any browser/device or through our native clients
> gpu-accelerated chrome
> zero-maintenance agent integrated at the OS level that runs 24/7
> thousands of integrations out of the box
> support for realtime collaboration - one desktop, multiple users
> built on top of linux, full root access

dm me if you're agent-pilled and frustrated with your current agent setup. or even if you just wanna taste of the future.

$100/month/desktop + we subsidize your agent's tokens while in beta.

[Endstack @endstack]

Adding auth to your vibecoded projects should be easy and tasteful.

Available for everyone and all plans today!

[Sam Park @SamuelPark]

Introducing Cosmic Auth.

Beautiful, customizable, no-code authentication and user management built right into all your @endstack apps.

All vibe coders deserve a tasteful, free, simple-to-use auth.

[Sam Park @SamuelPark]

lots of vibe coding tools promise 'tasteful design' but have no taste themselves and suck.

we're trying to make one that doesn't look bad and doesn't suck.

lots of exciting new things to share over the next few days!

[Endstack @endstack]

@samuelpark 👀

[Sam Park @SamuelPark]

UIs don't have to be flat and boring.

Trying something new.

[Endstack @endstack]

was this the actor in squid game?

[Sam Park @SamuelPark]

we spent $120,000 to hire a hot Korean actor to tell you about @endstack

use AI to build tasteful, functional websites without the hassle of setting up payments, building a backend, or writing code.

for every like we have to pay him an additional $10

[Grace Li @grx_xce]

more🚢s: Stitch by @GoogleLabs, @endstack and @magicpatterns have joined the arena

live results at @designarena

[Sam Park @SamuelPark]

today is undeniably the best time to build.

two years ago my brother and I were trying to build an ai native email/calendar client.

didn't work because llms sucked.

now its a hot idea.

there's alpha in revisiting your "impossible" ideas and see if you can build it today.

[Endstack @endstack]

@OTC_Bitcoin yes! go build something cool!

[Endstack @endstack]

No waitlist, open for all. Try it today for free!

[Sam Park @SamuelPark]

AI app builders promised seamlessness, but reality? Messy code, and layers of convoluted integration mazes.

So @joshhpark and I did the logical thing: dropped out of Harvard, raced through @ycombinator, pivoted, questioned our life choices, and shipped a solution.

Meet Cosmic

[Harish @k_8519]

@samuelpark Just now I saw Lovable tweet.....

I think cosmic is best then Lovable...

[Endstack @endstack]

@LuckyPhelps That's what we're saying😁

[Endstack @endstack]

GO BUILD SOMETHING COOL NOW

[Sam Park @SamuelPark]

Introducing Cosmic 2.0

The best AI tool available for building and monetizing websites and web apps.

Go from prompt -> first payment in minutes

Comment “cosmic” for 24 hours of unlimited credits.

(thread):

[Josh Park @joshhpark]

With Cosmic you don’t need to be a professional AI prompt writer to build amazing looking websites.

Just made this awesome looking retro dev portfolio and my prompt was literally “Hi there can you build me a retro dev portfolio that looks pixelated and fun?”.