These three are not really rivals. Project NOMAD is free software you install on a PC of your own, with an optional AI chat. Kiwix is a free reader for offline libraries, and it also sells a ready-made Raspberry Pi box. PrepperDisk is a boxed Raspberry Pi library you plug in. Only NOMAD has an AI assistant, and only NOMAD needs a computer with serious memory. Everything below is read from each project's own pages on 28 October 2026.
The short answer
Project NOMAD is the only one of the three with an AI chat, and it is free software for an x86 PC running Ubuntu or Debian. Kiwix is a free reader for Windows, Mac, Linux and phones, and it also sells a Raspberry Pi box for CHF 260. PrepperDisk is the finished box at $297.00, with no computer involved.
The table
| Project NOMAD | Kiwix | PrepperDisk | |
|---|---|---|---|
| Cost | Software is free; you buy the hardware | Reader is free; Hotspot box CHF 260 | $297.00 box; $165.00 SD card only |
| Hardware | An x86 PC running Ubuntu or Debian | Any Windows, Mac or Linux computer, a phone, or its Raspberry Pi 5 box | Its own Raspberry Pi 4B box, or your own Pi with the SD card |
| AI chat | Yes, optional | None on its pages | None on its pages |
| Best for | People with a spare PC who want a library, maps and an optional AI chat | Anyone who wants a free library on a computer or phone they own, or a finished box at CHF 260 | Buyers who want a finished box with a curated library and no setup |
| Setup effort | Terminal install; the project says two commands | Install an app and open a file; the box needs only power | Plug in, wait, join its Wi-Fi |
| Languages | Interface in English only | 100+ supported languages | Content downloadable in other languages |
Internet-in-a-Box, a fourth name that keeps turning up, is the free software underneath PrepperDisk. It installs on a $35 Raspberry Pi or on a Linux PC, and a Pi is where it is most used.
Project NOMAD
The FAQ calls it completely free and open source, under the Apache License 2.0, and says there are no costs beyond the hardware you run it on. It does not sell devices. That is the whole price, and it is a good one.
The cost is in the computer and the setup. The install guide says it is designed for x86 hardware, and the readme lists Debian-based Linux, with Ubuntu 26.04 LTS recommended. Installation is completely terminal-based, though the project's home page says two commands on an Ubuntu or Debian machine and no Linux experience needed. The software alone needs at least 5 GB of free disk. Adding the AI Assistant brings the install to roughly 25 GB, and the readme lists 32 GB of system memory as the optimal spec for the AI. The FAQ says the AI parts are optional, so a modest PC can run the library without them.
What NOMAD does best is put a library, maps, courses and an AI chat on one box that every browser on your network can reach. The interface is English only for now. If you have a Mac, read our guide to NOMAD on Mac, Windows and Raspberry Pi before you start.
Kiwix
Kiwix is the piece NOMAD itself uses for its offline Wikipedia. On its own it is a reader. Its FAQ says it is completely free to use, open source, and shows no ads and collects no user data. It runs on Windows, macOS, Linux, Android, iOS and in a browser, and it can also run on a Raspberry Pi. You download the libraries you want, then open the file.
The one thing Kiwix charges for is hardware. The Hotspot is a Raspberry Pi 5 with 4GB of memory and a 256GB drive that can grow to 1TB, serves up to 24 devices over Wi-Fi, and costs CHF 260 without content bundles. Kiwix's site says it supports 100+ languages, which is the widest language claim of the three. Neither its reader page nor its Hotspot page mentions an AI assistant.
PrepperDisk
PrepperDisk is the easiest of the three to start with, if you want a finished box. The Premium unit is a Raspberry Pi 4B with 2GB of memory and a 512GB card, at $297.00. If you already own a Pi, the software on a pre-loaded SD card is $165.00 and needs at least a Raspberry Pi 3B. The page also states that the card does not work on a PC or Mac, only on a Pi.
Its FAQ describes setup as plugging it in, waiting for it to boot and joining its Wi-Fi network. The premium unit takes up to 20 devices. Content can be downloaded in your own language through the web console, though not every item exists in every language. The FAQ says it is built on Internet in a Box and Kiwix, with its own content library added. We found no AI assistant on its pages. You are paying for the finished box and its curated library; because it is built on Kiwix and Internet-in-a-Box, the same kind of content is free to assemble yourself.
Pick in three questions
Do you want to ask questions in plain language and get a written answer? Then NOMAD is the only one of the three with an AI chat, and you need the PC to match. Our survival AI benchmark shows how well small offline models answer, so you know what to expect from that chat. If you don't need that, skip to the next question.
Do you own a spare PC and are you happy with a terminal? If yes, NOMAD is free and complete. If you have a Mac or Windows laptop and want something now, install the free Kiwix reader and download one library.
Do you want a box with no computer involved, for the whole family's phones? Then Kiwix Hotspot (CHF 260) or PrepperDisk ($297.00) are the two finished boxes, and you can build the same thing for less with Internet-in-a-Box on a Pi if you accept some setup work.
None of the three puts an AI chat on a Mac, and only NOMAD does it on any laptop. That gap is what we're building Waystone for. It is in development and not on sale, so weigh our view accordingly. For more options, including paid AI drives that run on a Mac, see our Project NOMAD alternatives page.
Common questions
Is PrepperDisk worth it?
It is worth it if you want a finished box and a curated library and do not want to assemble anything. The Premium unit is $297.00, or $165.00 for the SD card if you own a Pi. Because it is built on Internet in a Box and Kiwix, the same kind of content is free to assemble yourself, at the cost of setup work.
Is Kiwix better than Project NOMAD?
They do different jobs. Kiwix is a reader for offline libraries and has no AI on its pages, while NOMAD bundles a library, maps, courses and an optional AI chat on one server. Kiwix runs on the Mac or Windows laptop you already have, and NOMAD needs an x86 PC.
Which of these has an AI assistant?
Only Project NOMAD, and its AI is optional. The readme lists 32 GB of system memory as the optimal spec for it, so it wants a stronger PC than the library alone. Neither Kiwix nor PrepperDisk mentions an AI assistant on its pages.
Can I use Kiwix on a Mac?
Yes. Kiwix is free, lists macOS among its supported systems, and works by downloading the libraries you want and opening the file.
What is Internet-in-a-Box?
It is free software for serving an offline library, and it is the base that PrepperDisk is built on. It installs on a $35 Raspberry Pi or on a Linux PC.