hf.space

Domains 6.9/10

Default public hostname for Hugging Face Spaces. The subdomain is incidental; the binding free-tier constraint is that Spaces sleep on shared CPU hardware (2 vCPU / 16 GB) and cold-start on the next request.

hf.space scores 6.9/10 for free value in Domains. The main constraint: One auto-assigned hf.space subdomain per Space, served from shared CPU hardware (2 vCPU / 16 GB) that sleeps after inactivity and cold-starts on the next request.

Category Domains Kind Free subdomain Caveats Free Spaces sleep on the CPU Basic tier and cold-start on the next request; always-on and faster hardware require a paid upgrade. Card required No Eligibility anyone

Free value score

6.9 / 10

Show the math

Overall 6.9/10

value = 6.9/100

weighted_components_v1

Name/DNS value 7.2/10

value = 13 $/yr

fixed_log_v1

API/DDNS fit 5.4/10

value = 5.4/100

policy_score_v1

Trust and friction 8.3/10

value = 8.3/100

policy_score_v1

Key metrics

Sleeps on Free-tier constraint cold starts

2 vCPU Free hardware shared CPU

1 Free domains incidental

0 DNS records HF-managed

n/a DDNS refresh static subdomain

Yes Ad-free

What you get

One auto-assigned hf.space subdomain per Space, served from shared CPU hardware (2 vCPU / 16 GB) that sleeps after inactivity and cold-starts on the next request.

User-owned demo/backend URLs.

Limitations

Sleeps on free CPU hardware

Spaces on the free CPU Basic tier go to sleep after a period of inactivity and cold-start on the next request; always-on requires a paid hardware upgrade.
One subdomain per Space

Each Space gets exactly one auto-generated hf.space subdomain; you cannot bring your own domain on the free tier.
No custom domain on free tier

Custom domain mapping is supported but requires paid hardware or PRO plan; free Spaces are reachable only via the auto-assigned hf.space subdomain.
No protected visibility on free plan

Protected Space visibility (private source, public app) requires a PRO or Team & Enterprise plan; free users only get public or fully private Spaces.
Shared CPU Basic (2 vCPU / 16 GB)

Free hardware is limited to 2 shared vCPUs and 16 GB RAM; GPU and higher-CPU tiers require paid upgrades.
Non-persistent disk (50 GB ephemeral)

The default 50 GB disk is not persistent across restarts; persistent storage requires a paid add-on.
HTTP/HTTPS ports only (80, 443, 8080)

Outbound and inbound network access is restricted to ports 80, 443, and 8080; all other ports are blocked.

Sources

"Each Spaces environment is limited to 16GB RAM, 2 CPU cores and 50GB of (not persistent) disk space by default, which you can use free of charge."
https://huggingface.co/docs/hub/en/spaces-overview
"If your Space runs on the default `cpu-basic` hardware, it will go to sleep if inactive for more than a set time (currently, 48 hours). Anyone visiting your Space will restart it automatically."
https://huggingface.co/docs/hub/en/spaces-gpus
"ZeroGPU Spaces are available to use for free to all users. ... PRO users get x8 more daily usage quota, highest priority in GPU queues"
https://huggingface.co/docs/hub/en/spaces-zerogpu
"In 2025, Hugging Face grew to 13 million users, more than 2 million public models, and over 500,000 public datasets."
https://huggingface.co/blog/huggingface/state-of-os-hf-spring-2026

subdomain spaces

Open service Source ← All Domains