{"rid":"compute/molab","card":{"rid":"compute/molab","eid":"marimo","topic":"compute","slug":"molab","provider":"molab","url":"https://docs.marimo.io/guides/molab/","domain":"marimo.io","category":"notebook runtime","tier":"free public preview","verdict":"qualifies","vorder":0,"grp":"usable","confidence":"documented","binding":"volume-quota","identity_kind":"email","identity_basis":"stated","needs_card":0,"needs_phone":0,"needs_id":0,"needs_institution":0,"country":null,"crypto":null,"interfaces":"rest","egress_metered":0,"per_object_bytes":null,"retention_days":null,"verified_at":"2026-10-24T01:52:00.000Z","verified_basis":"live","checked_on":"2026-10-25","stale_on":"2026-11-24","n_evidence":12,"usd_month":null,"usd_per_tb_month":null,"summary":"free: 4 CPUs and 32 GB RAM per notebook, an NVIDIA RTX Pro 6000 Blackwell with 96 GB VRAM attachable to any notebook, sessions up to 12 hours, 90-minute idle...","duplicate_of":null,"n_unknown":1},"record":{"topic":"compute","slug":"molab","provider":"molab","url":"https://docs.marimo.io/guides/molab/","category":"notebook runtime","free_tier":{"stated":"free: 4 CPUs and 32 GB RAM per notebook, an NVIDIA RTX Pro 6000 Blackwell with 96 GB VRAM attachable to any notebook, sessions up to 12 hours, 90-minute idle shutdown","unit":"hours","metered_on":"wall-clock","source_url":"https://docs.marimo.io/guides/molab/","notes":"No published monthly hour cap. The vendor says the service stays free while capacity is not oversubscribed.","read_on":"2026-10-24"},"per_object_cap":{"stated":"not applicable: the unit is a session, not an object"},"retention":{"stated":"a limited amount of persistent storage per notebook; files uploaded through the sidebar or cached with mo.persistent_cache are persisted, subject to limits on file size and duration that may change at molab's discretion","days":null,"source_url":"https://docs.marimo.io/guides/molab/"},"egress":{"terms":"no published egress allowance or price","metered":false,"free_allowance":null,"source_url":"https://docs.marimo.io/guides/molab/"},"interface":["rest"],"interface_detail":"inferred from the tooling the provider documents; not probed","tooling":"not stated","chaining":"A 96 GB VRAM card in a browser tab for 12 hours at a time is the largest single free GPU in the wave that needs only an email, and it composes with molab's GitHub mirroring to hold the notebook source outside the session.","limits":[{"kind":"volume-quota","value":"12 hours maximum session, 90 minutes idle shutdown, no published monthly cap","source":"https://docs.marimo.io/guides/molab/"}],"limits_note":"There is no published GPU-hours figure at all, and the vendor reserves both the price and the resource parameters, so the card can be withdrawn or resized with no notice period and no number a plan can be built on.","binding":"volume-quota","binding_note":"nothing is metered, so nothing runs out on a schedule; the 12-hour session is the wall, and the vendor reserves the right to change the resources","identity_cost":{"kind":"email","detail":"a browser session at molab.new; the documentation describes no card and no phone step. Not stated explicitly as 'no card', so read as the absence of a stated gate rather than a documented one.","country":null},"reliability_note":"the vendor states the free service continues only while resources are not oversubscribed, so capacity is the risk rather than a counter","confidence":"documented","evidence":[{"url":"https://docs.marimo.io/guides/molab/","date":"2026-10-22","proved":"quoted: 'Notebooks can run for as long as 12 hours before molab shuts them down. Notebooks that are idle for more than 90 minutes are automatically shut down.'"},{"url":"https://docs.marimo.io/guides/molab/","date":"2026-10-22","proved":"quoted: an NVIDIA RTX Pro 6000 Blackwell GPU with 96 GB of VRAM and 125 TFLOPS can be attached to any notebook; default 4 CPUs and 32 GB RAM; notebooks run as long as 12 hours; idle over 90 minutes shuts down"},{"url":"https://marimo.io/blog/reintroducing-molab","date":"2026-06-01","proved":"quoted: the public preview of molab runs natively on CoreWeave Cloud with opt-in GPUs and 12 hour sessions"},{"url":"https://linux.do/t/topic/2696589","date":"2026-09-01","proved":"forum report, translated: molab has an NVIDIA RTX Pro 6000 Blackwell in public beta limited to 12 hour sessions, and has no public IP interface, with tunnelling generally blocked, so it is training only rather than serving"},{"url":"https://marimo.io/blog/newsletter-25","date":"2026-10-22","proved":"quoted: 'It will remain free as long as our resources are not oversubscribed, though we may tweak resource parameters in the public preview as we adapt to load' [date precision: year precision] [re-read 2026-10-22]"},{"url":"https://marimo.io/blog/reintroducing-molab","date":"2026-10-22","proved":"quoted: 'We are providing molab - GPUs and all - for free, as long as usage is reasonable' [date precision: year precision] [re-read 2026-10-22]"},{"url":"https://docs.marimo.io/guides/molab/","date":"2026-10-24","proved":"quoted: 'By default, each notebook runs with 4 CPUs and 32 GB of RAM.'"},{"url":"https://docs.marimo.io/guides/molab/","date":"2026-10-24","proved":"quoted: 'You can attach an NVIDIA RTX Pro 6000 Blackwell GPU — with 96 GB of VRAM and 125 TFLOPS — to any notebook.'"},{"url":"https://docs.marimo.io/guides/molab/","date":"2026-10-24","proved":"quoted: 'Notebooks can run for as long as 12 hours before molab shuts them down. Notebooks that are idle for more than 90 minutes are automatically shut down.'"},{"url":"https://docs.marimo.io/guides/molab/","date":"2026-10-24","proved":"quoted, bold markers in the original: '**Is molab free?** Yes.'"},{"url":"https://docs.marimo.io/guides/molab/","date":"2026-10-24","proved":"quoted: 'Notebooks get a limited amount of persistent storage' — persisted only through the sidebar upload or mo.persistent_cache"},{"url":"https://docs.marimo.io/guides/molab/","date":"2026-10-24","proved":"quoted: 'notebooks are public but undiscoverable by default'"}],"verdict":"qualifies","verified_at":"2026-10-24T01:52:00.000Z","notes":"No monthly GPU-hour quota is published, which is the one number a planner needs. The idle rule (90 minutes) is far more generous than Colab's or Kaggle's, and 12 hours matches Colab's cap with much better hardware.","extras":{"wave2":{"class":"enforcement","free_tier_kind":"public-preview","shape":{"vcpu":4,"ram_gib":32,"gpu_class":"RTX Pro 6000 Blackwell","gpu_count":1}},"shape":{"vcpu":4,"ram_gib":32,"disk_gib":null,"gpu_class":"NVIDIA RTX Pro 6000 Blackwell","gpu_count":1,"note":"the GPU is opt-in per notebook and comes with 96 GB VRAM"},"billing_model":"free","term":"none","m10h_usd":0,"m24h_usd":0,"price_arithmetic":"USD 0.00: public preview, no card","free_tier_kind":"free-preview","unattended":false,"unattended_mechanism":"unverified: the docs describe no scheduler and no headless submit; a 90-minute idle shutdown implies the browser session must stay active","network_out":{"allow_outbound":true,"allow_inbound_listen":false,"ports":"unstated","static_ip":false,"ipv6":false,"per_session_bytes":null},"session_cap":{"wall_clock_min":720,"idle_reap_s":5400,"restart_required":false,"note":"12 h maximum; 90 min idle shutdown"},"units":"RAM and disk are quoted in the vendor's own decimal GB, not GiB. The ram_gib and disk_gib keys carry the vendor's number unconverted, so where a vendor writes 30 GB the key holds 30 and the true value is about 27.9 GiB. No conversion was performed."},"tier":"free public preview","confidence_note":"compute, GPU, session length and idle timeout are quoted from the vendor's docs page today. The absence of a card gate is inferred from the docs describing none; one signup would settle it."},"claims":[{"path":"$.extras.m10h_usd","kind":"price","num":0,"unit":null,"per":"month","currency":"USD","usd":0,"fx_date":null,"parse":"ok"},{"path":"$.extras.m24h_usd","kind":"price","num":0,"unit":null,"per":"month","currency":"USD","usd":0,"fx_date":null,"parse":"ok"},{"path":"$.free_tier.stated","kind":"free-quota","num":32,"unit":"GB","per":null,"currency":null,"usd":null,"fx_date":null,"parse":"ok"},{"path":"$.limits[0].value","kind":"limit:volume-quota","num":12,"unit":"hours","per":null,"currency":null,"usd":null,"fx_date":null,"parse":"ok"}],"unknown":[["$.tooling","not-stated"]],"history":[],"drift":[]}