One of these is a network. The other is a folder on your disk.

The word in the search that brought you here is offline, so start there, because it means two quite different things and only one of them is about aeroplanes.

The first meaning is literal: can I use this on a train, on a shoot with no signal, on a client's network that blocks everything. Are.na is a hosted service — a browser, or its iOS app — so the answer there is what it is for any service. Coii Ref has no server, no account and no sync, so the answer is that nothing changes when the connection goes: search, ratings, tags, saved views and canvases behave identically, because none of them were ever anywhere but your machine.

The second meaning is the one people are usually circling: is my collection mine? That is a question about where the material sits and what shape it is in, and it deserves a longer answer than a feature row. Both applications have a decent one, and they are not the same answer.

What Are.na is, with today's numbers

Read off their own about page on 3 September 2026, because a price in a competitor's paragraph is only worth as much as the date next to it.

• Guest, free, capped at 200 blocks in total.
• Premium, unlimited blocks, $7 a month or $70 a year.
• Supporter, $120 a year, for people who want to fund the thing beyond what it costs them.
• Member-funded, with no advertising business — their own description of themselves, and the reason a lot of people moved there in the first place.
• An iOS app, free, from When It Changed Inc.; its listing shows iPhone, iPad and Apple Vision, and does not list Mac.
• A documented public API for channels and blocks, which is rarer than it should be and genuinely valuable.
• A documented way to download a channel: open the More… dropdown on the channel and choose to download it.

Coii Ref, for the same paragraph: $19 once, three Macs, updates included, a 30-day trial with every feature and no card, macOS 11 Big Sur or later, native on Apple Silicon and Intel.

Where Are.na is the better tool, plainly

Connection is the product. A block can sit in many channels at once, and following what else a channel contains is how the thing is meant to be used. That is a genuinely different way of holding research than a folder tree, and for people who think in threads rather than in categories it is not replaceable. Coii Ref has nothing like it: no graph, no cross-collection membership, no path from one image to the other places it appears.

Other people. The reason a channel is interesting is often that somebody else built it. Coii Ref has never seen an image that is not already on your disk, so serendipity is not on the menu. If discovery matters, Pinterest does it at enormous scale and Are.na does it at a slower, more considered one; a local index does not do it at all.

It holds everything, not just pictures. Links, text, PDFs, quotes, recordings — a channel can carry the article as well as the image from it. Coii Ref indexes images and video and nothing else: no PDFs, no documents, no web pages. For a research practice that is half reading, that is disqualifying on its own.

It is on every machine you sit at, and on your phone, and it does not care whose computer it is. Coii Ref exists on a Mac, and only on the Mac with the folder.

The API. You can build against your own collection. We have no API, and what we have instead is described below — worse for integration, better for inspection.

One more thing belongs in that list, and it is the most persuasive argument anyone makes for a service like this: it is somewhere else. A collection that does not depend on the drive in your bag surviving the year is a collection with a property no local library has. Coii Ref's honest answer to that is not a feature, it is an instruction — keep backing up the folder, exactly as you back up everything else, because nothing about a local index is a backup and we have never pretended otherwise.

Where the two actually diverge

Not "which is better", but which problem each was built for.

Are.na is built for the thinking: collecting things that might be related, putting them near each other, and coming back to find that the arrangement turned into an idea. Its unit is the block, and a block can be anything.

Coii Ref is built for the retrieval: you have eleven thousand images across six folders and four years, you need the nine that are right for a job today, and you are not going to find them by scrolling. Its unit is the file that already exists on your disk.

You can feel the difference in what each one asks of you. Are.na asks you to put something somewhere, which is a small act of curation. Coii Ref asks you for nothing at all — point it at a folder and everything already in there is searchable, tagged or not, filed or not, including the four thousand things you saved in 2023 and have not thought about since.

Offline, in the literal sense

Here is what "no server" buys, concretely, because it is the whole of our side of this comparison.

Everything Coii Ref writes lives inside the folder you pointed it at: the index, the thumbnails, the canvas-resolution proxies. That is the workspace.

Your existing backup already covers it, because it already covers the folder. Copy the folder to another drive and the whole workspace goes with it. Open it on a second Mac and there is no export, no login and no first-run sync — the database is right there. And when a drive comes back after a month in a bag, it reconciles rather than starting over, because the watcher turns filesystem events into the smallest re-scan that makes the index true again. Rename a file in Finder and it stays the same item with the same rating and notes.

The network list is two items long: a licence check when you press Activate, and one request at launch read only for its Date header, so a wound-back clock cannot mint free trial days. No analytics, no crash reporting, no update check. It is on the home page in full, and short enough to check rather than believe.

The table

Two of those rows are draws, and it is worth saying so: neither product has an advertising business, and neither is trying to sell your collection back to you. That is a genuine thing to have in common and it is why the comparison is narrower than it looks.

What a local index does that a channel cannot

Search composed at the moment you have the question. One line, AND across keys, OR inside a comma list, no parentheses:

type:image width:>=3000 rating:>=4              big and good
in:Scans tag:any:texture,paper                   either tag, one folder
type:video ext:mov added:>2026-04                clips since April
has:notes no:tags                                written up, unfiled

An unrecognised word becomes free text instead of an error, so the grid keeps returning results while you type. Saved views store the text of the search rather than a list of members, and re-parse it on open, so renaming a tag updates every view that mentions it.

Canvases that are files. A board here is a .coii-canvas file: pretty-printed JSON in a folder you chose, which diffs in git, syncs with whatever you already sync with, and opens in a text editor. It is the one claim on this site that a reader can verify with cat rather than take on trust, which is exactly why it is the one we lead with.

Video treated like everything else. Same index pass, same tags and ratings, same query line, with proxies written at canvas resolution so a board of clips scrolls like a board of stills.

Nothing to keep paying for. Not a moral position — a structural one. An app with no servers has no recurring cost to pass on, which is why $19 once is possible here and why it would not be possible for a service that hosts your uploads and syncs them between five platforms. The corollary is the honest one: we cannot offer you sync, sharing or a network, now or later, without becoming a different kind of company.

The two hundred block wall, and what it is for

The free tier stops at 200 blocks in total, which sounds small until you notice what it is doing: it is enough to genuinely try the thing and not enough to run a practice on, which is a fair way to price a service that has to pay for storage. Nobody is being tricked. The question is only whether the way you work crosses that line, and for anyone using a collection tool seriously it does within a few months.

Coii Ref's version of the same honesty is the thirty-day trial: every feature, no card, no account. What stops on day thirty-one if you have not bought is one category of action, which is growing the library — registering a new folder, running the importer, starting an index pass by hand. Everything that reads carries on permanently, including search, tags, ratings, saved views, canvases and thumbnails, and the folder watcher keeps running, so an unpaid copy does not let your index rot. It just stops taking on more.

The question worth asking of any hosted collection

Including, to be fair, of any desktop app — the version of this question that applies to us is answered below.

If a collection lives in a service, the useful thing to know is not what you suspect might happen to that service. It is what you can do today, on a normal Tuesday, to make the collection independent of it. Are.na publishes two answers to that: a channel download, and an API you can build against. Both are linked above, and both are worth exercising once — not because anything is wrong, but because the first time you try an export should not be the day you need it.

Coii Ref's answer to the same question is structural rather than procedural. There is no export, because there was no import: your images are files in your folders that the app read and never touched, and a board is a JSON file sitting beside them. If this app disappeared tomorrow, the directory would be exactly what it is today, minus a database and some thumbnails you would not miss. That is not a promise about our longevity — no one can make you one of those honestly. It is a statement about the format your work is in, which is the only part of the question anybody can actually check.

What Coii Ref does not have

Stated plainly so the trial holds no surprises. No accounts, no cloud, no sync, no sharing links, no collaboration, no mobile app. No browser extension, so saving from a web page stays whatever it is for you today. No relationship graph and no way for one file to belong to several collections without existing in several places. No automatic tagging and no search by meaning — the search is literal, over what is already true of your files. No PDFs, documents or 3D formats: images and video. And macOS only, version 11 or later, which rules us out entirely for anyone whose work happens on more than one kind of computer.

Using both, which is what most people here should do

The seam that works: think in channels, keep files on disk.

Use Are.na for the research thread — the collecting, the connecting, the seeing what somebody else put next to the thing you saved. When an image graduates from interesting to I am going to work from this, it becomes a file in a folder that means something on your own machine. Then one index pass over that tree, and everything you have ever kept is searchable in the same breath, whether it came from Are.na, a client, a camera or a screenshot four years ago.

That habit also answers the question underneath the keyword. A channel download is a thing you can do; a folder of files is a thing you already have. The second needs no plan.

Who should pick which

Are.na if the value is in connection and company: blocks across channels, other people's collections, research that is half reading, an API to build against, and access from any machine including a phone. Seven dollars a month for that is not the expensive part of anyone's practice.

Coii Ref if the material is already on your Mac and the problem is finding it; if you work where there is no connection often enough for it to matter; if video belongs beside the stills; if you want the arrangement to be a file you own rather than a record in a service; and if one payment of $19 suits you better than a subscription for storage of things you already have.

Neither, if your collection is small. Folders and Finder genuinely work up to a few thousand images, and the honest threshold for buying anything is the first time you cannot find something you know you saved.

If the shape you want is closer to a desktop application than to a service, the neighbouring pages cover that ground: refern is the most capable app in this category at $35 once, with an on-device tagger and a search that finds images nobody tagged, neither of which we have; Eagle takes your files into a managed library rather than indexing them where they sit; PureRef is free for personal use and floats a board over whatever you are working in; and Milanote is where a board goes when it needs writing on it and other people looking at it.

Otherwise: the library has the rest of the comparisons and the practical guides, and the trial is thirty days with every feature, no card and no account — enough to index a real folder tree and find out whether searching your own disk feels like the missing half.