BBLabs vs VulnHub: vulnerable machines or web bug bounty labs?

What is VulnHub and what is it so good at?

VulnHub is a veteran, free repository of deliberately vulnerable virtual machines. You download a VM image, import it in VirtualBox or VMware and hack it end to end: you enumerate services, find the way in, exploit and escalate privileges until you reach root. It's the classic boot2root format, very much in the OSCP exam style.

As a training ground for infrastructure pentesting, it's among the best you can get for free: privilege escalation, pivoting, full-machine enumeration. All free and offline. We recognize that without reservations — if your goal is the OSCP, VulnHub is a huge resource.

The key difference: infra vs web bug bounty

This isn't a "better or worse" comparison, but one of different territories. VulnHub is about machines: your goal is to compromise a whole system. BBLabs is about web applications: your goal is to find the bug a bug bounty program would pay for — an IDOR, an SSRF, broken business logic, a stored XSS.

In BBLabs, each lab replicates a real report from HackerOne, Bugcrowd or Intigriti, with its context, its exploitation chain and the bounty that was paid. It's not a machine you take to root: it's the specific web vulnerability a hunter reported and got paid for. If your goal is to hunt bugs in bounty programs, that's exactly the muscle you train.

Format and setup: standing up VMs vs opening the browser

With VulnHub you provide the virtualization infrastructure: downloading the image, importing it in VirtualBox or VMware, configuring the network and booting before attacking. It's part of the craft, but it takes time and machine resources. In BBLabs you don't set up VMs: you launch the lab directly in the browser with the live labs, or download the ZIP and run it with Docker locally if you prefer. Immediate start and less friction. VulnHub is free in exchange for you providing the virtualization.

Language and writeups: self-taught English vs guided Spanish

VulnHub is in English and doesn't bring official writeups: when you get stuck, you rely on community blogs and videos (excellent, but scattered and almost always in English). BBLabs is 100% in Spanish and each lab comes with its official step-by-step writeup, plus a free Academy with 16 vulnerability categories (theory, payloads and methodology). You can study the theory without paying anything and practice on real labs with support, in your language. For a Spanish speaker, that guidance is hugely appreciated.

Who each one is for

Verdict: they don't compete, they complement each other

There's no winner here, because they play different games. VulnHub is a free, offline, classic resource, unbeatable for practicing infrastructure pentesting and prepping for the OSCP. It's an honest recommendation if that's your path. BBLabs does something else: it turns real web bug bounty reports into curated labs you practice in Spanish, with writeups, live labs and a roadmap that guides you from Easy to Insane. If you want a complete offensive profile, use VulnHub for infra and BBLabs for web — and you can start for free with the Academy.