DEVONthink vs Curio: which to buy once

Both are Mac apps you can own outright, both include a year of updates, and both keep working when that year ends. They are not, however, the same kind of tool. DEVONthink 4 is a document database that indexes everything you feed it. Curio 34 is a canvas you arrange things on. The licence terms differ more than the prices do. Entry prices are a dollar apart: $99 against $99.99, read off both vendors' pages on October 29, 2026. The ceilings are $499 and $119.99. This comparison is built from pricing pages, editions tables and licence agreements. No testing was carried out, and every figure below carries the date it was read.

4.1DEVONthink 4

Winner

3.9Curio 34

Specification by specification

The short answer: DEVONthink stores, Curio arranges

Pick by the job, not by the price, because the prices are nearly identical at the entry point.

• DEVONthink is best for keeping thousands of documents, emails and PDFs and finding a sentence inside them two years later
• Curio is best for laying twenty or thirty things out on a page until the shape of a project becomes obvious

DEVONthink takes the overall win on durability, not on price

The verdict here goes to DEVONthink 4 for one reason: it is the tool more people will still be using in five years.

A document archive gets more valuable as it grows, and the licence that holds it never expires. The vendor states that plainly in its own FAQ.

A canvas tool is judged project by project. When a project ends, the canvas is finished with, and the switching cost is low.

That is a judgement about durability rather than quality. On licence generosity alone, Curio is the better deal, and the section below says so without hedging.

Entry prices are within a dollar; the ceilings are not

DEVONthink Standard is $99 and Curio Standard is $99.99, both read on October 29, 2026. At that level the choice is purely about the job.

The ceilings separate sharply. Curio Professional is $119.99, a $20 step. DEVONthink Pro is $199 and Server is $499.

So the worst case on Curio is $119.99. The worst case on DEVONthink is five times its own entry price.

That ceiling matters because edition upgrades are priced later too. Standard to Server on DEVONthink is $399 plus $49 per extra seat, against a $400 gap at purchase by our arithmetic.

Curio's licence covers every Mac you own; DEVONthink's covers two

This is the clearest win on the page and it is not close.

Curio's pricing FAQ states that for licence keys, "Installation is allowed on multiple Macs you personally own or control".

DEVONthink includes two seats, described as "valid for two Macs". A third Mac costs $49 on Standard and $99 on Pro or Server.

Two seats is still better than the single-machine licence many Mac developers sell. But a household with a desktop, a laptop and a work machine pays $148 for DEVONthink Standard against $99.99 for Curio Standard.

Both include one year of updates, and both survive the year ending

The model is the same on both sides, which makes the comparison unusually clean.

DEVONthink states that a licence buys the app plus "one year of updates", and that when the year is up "The app will always be yours and fully functional."

Curio describes a licence key as "a one-time purchase for the current version of Curio plus a full year of free major updates", after which it "doesn't expire".

Neither app switches off, nags, or drops to read-only on the files you already made. If this model is new to you, what happens after you pay once walks through the decade-long version of it.

Renewal pricing favours DEVONthink on the entry tier

DEVONthink Standard renews at $49, or $44 if you extend before the year is up. Curio Standard renews at $69.99, or $59.99 coming straight from the previous version.

So renewing DEVONthink Standard every year costs $44 to $49. Renewing Curio Standard costs $59.99 to $69.99.

On the higher tiers the gap reverses. DEVONthink Pro renews at $99 and Server at $149, while Curio Professional renews at $79.99 to $89.99.

DEVONthink also sells multi-year extensions at a discount: $79 for two years and $104 for three on Standard. Curio publishes no equivalent multi-year price on the pages read.

Only Curio offers a subscription, and it costs more than its own renewal

DEVONthink has no subscription at all, which simplifies its page considerably.

Curio sells one through the Mac App Store at $5 a month for Standard billed yearly, or $6 billed monthly. Professional is $6 and $8.

By our arithmetic the yearly Standard subscription is $60 a year, which undercuts the $69.99 licence renewal. A buyer who renews religiously is better off subscribing.

The catch is that the two builds are incompatible. Curio's page states the website build "only works with license keys" and the App Store build "only works with Apple's subscriptions".

Only Curio has a free tier; only DEVONthink has a long trial

The two vendors solve the try-before-you-buy problem differently, and both solutions are decent.

Curio gives two weeks with every Professional feature on, then drops to free mode with Standard features and a five idea space cap. Larger projects stay open read-only for viewing, exporting and printing.

DEVONthink gives "Minimum 30 days or 150 hours of pure runtime", which is the longer and more forgiving clock. A busy fortnight does not burn it.

For a document archive the runtime clock is the better design, because you cannot judge a search index until it holds real work. For a canvas, two weeks is enough to know.

Features: DEVONthink wins on volume, Curio on arrangement

DEVONthink's editions table lists eighteen capability rows in Standard alone, then adds roughly twenty more for Pro, including OCR, email archiving, transcription, concordance and a graph view.

Curio's free tier already includes rich text and Markdown with LaTeX, mind maps, lists, tables, kanban stacks, tags, dates, priorities and search. Standard removes the idea space cap. Professional adds a CLI with an MCP server, table formulas, Mermaid diagrams and presentation mode.

Neither list settles the choice, because they barely overlap. Only one of them indexes email. Only one of them lets you drag a figure across a page.

One caution on DEVONthink's table: it lists Scripting and batch processing twice, once as available in all editions and once as Pro and Server only. The page carries its own disclaimer that it "does not claim to be complete".

Pro tiers: a $100 step against a $20 step

The step up is where the two pricing philosophies separate most visibly.

Curio Professional costs $20 more than Standard and adds automation: the CLI and MCP server, query-based collections, table formulas, synced figures, diagrams and presentation mode.

DEVONthink Pro costs $100 more than Standard and adds whole subsystems: scanner integration with OCR, barcode scanning, PDF imprinting, email archiving, speech transcription and the AI features.

If you are undecided, the cheap decision is Curio Professional and the careful decision is DEVONthink Standard. Moving up on DEVONthink later saves nothing, since Standard to Pro is $99 either way.

Neither vendor publishes a money-back guarantee

This is the weakest shared point, and it is worth stating before either purchase.

DEVONtechnologies' licence agreement offers a refund only where the software fails to conform to warranty, in which case the vendor "may at its option either replace the Software free of charge to you or refund the purchase price".

Zengobi outsources the question. Its legal page says Paddle "handles inquiries regarding the specifics of those sales transactions, including returns and refunds" for direct sales, and Apple handles App Store sales.

So in both cases the trial is the safety net rather than the receipt. For contrast, BBEdit publishes a 30-day refund window in its own sales policies, which is the better practice.

System requirements favour DEVONthink on older hardware

If your Mac is a few years behind, this row decides the comparison on its own.

DEVONthink 4.4.2 requires macOS Ventura or later. Curio 34 requires macOS 15 Sequoia, and the page states it runs "through macOS 27 Golden Gate on Apple silicon or Intel".

That is a gap of two macOS generations. A Mac stuck on Sonoma can run current DEVONthink and cannot run current Curio.

Both vendors keep older releases available, but an older release stops receiving fixes. Buying software your operating system cannot run is the most avoidable mistake in this whole category, and it is covered in how lifetime software deals actually work.

Academic buyers do better with Curio, but only through the website

Curio publishes its academic prices openly: $79.99 for Standard and $99.99 for Professional, with renewals from $49.99.

It also states the limit clearly. Academic and volume discounts "aren't supported" on Mac App Store subscriptions, only on licence keys from the website.

DEVONtechnologies offers academic and non-profit discounts too, and says the discount also applies to version upgrades and later extensions. The prices sit on a separate students and NPO page rather than the pricing page.

For a student buying one tool for a multi-year project, Curio at $79.99 with $49.99 renewals is the cheaper documented path.

Where Curio wins outright

Three rows go to Curio without argument, and a fair comparison has to say so.

• Machines covered: multiple Macs you own, against two seats on DEVONthink
• Price ceiling: $119.99 at the top, against $499
• Free tier: a permanently usable free mode, where DEVONthink offers only a trial

Choose DEVONthink if

The deciding factor is almost always whether you need to find things later.

• You have thousands of documents and need full-text search across all of them
• You want email archived alongside files, which the editions table puts in Pro
• You need OCR on scans, also a Pro feature
• You are on macOS Sonoma or Ventura and cannot run Curio 34
• You already keep long-form work in Scrivener or iA Writer and want a reference library beside it

Choose Curio if

The deciding factor is whether you think by arranging rather than by searching.

• You work project by project and want each one on its own canvas
• You run three or more Macs, where the licence terms save real money
• You want to start free and only pay when the five idea space cap bites
• You qualify for academic pricing at $79.99
• You already use something from our pay-once productivity picks for tasks and want a thinking surface instead of another list

Both keep your data local, with different plumbing

Neither vendor runs a cloud you are obliged to use, and both say so on their own pages.

DEVONthink states that your database sits on your devices, "not on our servers". When syncing, the connection, the copy placed on a cloud service and optionally the database on the Mac itself can all be encrypted.

Encrypted databases appear in DEVONthink's Standard edition, not only in Pro, which is the right place for them.

Curio's published security feature is narrower: a project password for project security. Its companion capture app, Curiota, is free and works with or without a Curio licence, feeding notes and files in from macOS Services, the share button, the print dialog or AppleScript.

Both publish the price of the next upgrade, which most vendors do not

This is the quietest point in favour of both products, and it is the one a deals reader should weigh most.

DEVONtechnologies lists the version 3 to version 4 upgrade at $49, $99 and $149 by edition, and states it is "independent from the number of seats". Existing licence codes stay valid.

Zengobi lists Curio 34 renewal prices for owners of Curio 33 at $59.99 Standard and $79.99 Professional, with higher prices for anyone further back.

A vendor that prints the upgrade price has set your maximum future cost in public. A vendor that does not can invent it later, which is the main argument for buying from either of these two over a cheaper unknown.

What we could not verify on either side

Three gaps apply equally, and naming them is part of the job.

Neither vendor publishes a support response time, ticket system or staffing level on the pages read October 29, 2026. Both run public forums instead.

No independent user rating with a usable sample size was found for either product. Both publish selected customer quotes on their own sites, which is marketing copy.

No testing was carried out for this comparison. Search speed, canvas performance, sync reliability and OCR accuracy are all ungraded here. Every figure above comes from vendor pages on a single date, and prices move.

Bottom line

Buy DEVONthink Standard at $99 if the problem is that you cannot find things. It is the tool that gets more useful every year you keep feeding it.

Buy Curio Standard at $99.99 if the problem is that you cannot see the shape of a project. It is also the better licence, covering every Mac you own.

Do not buy either on the strength of the Pro tier without checking the feature list. On DEVONthink that step costs $100; on Curio it costs $20.

Try both first, since one gives you 150 runtime hours and the other gives you a free mode that never ends. Before paying, read how to read a software deal before you pay and check the live price in the cart.

Frequently asked

Visit DEVONthink 4
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Visit Curio 34
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