[HN Gopher] Show HN: Molab, a cloud-hosted Marimo notebook works...
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Show HN: Molab, a cloud-hosted Marimo notebook workspace
We launched marimo [1], an open-source reactive Python notebook,
last year on HackerNews. Today, the most popular recent feature
request in Google Colab's issue tracker asks for marimo support in
Colab [2]. Rather than try to convince Google to replace their
notebook with marimo, we decided to just build our own cloud-hosted
notebook service instead. We're calling this molab (mo for marimo),
and we're launching it today. You can try it at
https://molab.marimo.io Some features: - Persistent storage -
Link sharing (notebooks are public but undiscoverable, like secret
GitHub Gists) - Download notebooks to your machine, reuse them as
Python scripts or apps - Upload local notebooks to the cloud from
our CLI (coming soon) - Real-time collaboration (coming soon) -
Configure computational resources to obtain more CPU or GPU (coming
soon) marimo is a modern notebook for modern data workflows; we
also built molab on a modern tech stack: - Notebook dependencies
are managed by uv, enabling lighting-fast package installation
(thanks to uv's cache and more generally its performant
implementation). uv makes it easy to run molab notebooks locally,
too: uvx marimo edit <notebook-url> brings the notebook down to
your machine. - Persistent storage is powered by R2, Cloudflare's
zero-egress object store. - We use Pydantic logfire to monitor our
deployment. - While our implementation is agnostic to the compute
backend (stay tuned!), we're currently running on Modal for fast
startups (not to mention a slick developer experience). Modal
sandboxes make it easy for us define containers at runtime,
containing notebook code and their dependencies. (Shout out to Eric
Zhang from Modal for helping us get started.) molab is free to
use, as long as usage is reasonable. Our goal is to make is as easy
as possible for our community to use marimo notebooks. Finally,
learn more at our announcement blog:
https://marimo.io/blog/announcing-molab If this interests you,
please give molab a shot and please share feedback -- here or on
Discord (https://marimo.io/discord). P.S. This is not our
commercial product, this is really just for our community. [1]
https://github.com/marimo-team/marimo [2]
https://github.com/googlecolab/colabtools/issues?q=is%3Aissu...
Author : akshayka
Score : 45 points
Date : 2025-07-18 18:40 UTC (4 hours ago)
(HTM) web link (molab.marimo.io)
(TXT) w3m dump (molab.marimo.io)
| cantdutchthis wrote:
| Everyone: don't push live on a Friday. marimo: ... hold my beer
| dmadisetti wrote:
| Everyone knows prod doesn't break on the weekends
| hmartin wrote:
| Its completely failed several times in the course of an hour
| for me :'(
| akshayka wrote:
| Sorry! Did the notebook not connect to the runtime? Notebooks
| usually start quickly but there is variance, which we are
| working to tighten. If you have a notebook link/ID, we can
| look into it.
| matsonj wrote:
| I was hopeful for Wasm to make this work better but it just
| didn't. really cool to see this available - i was wondering what
| the next step was.
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