What a certificate of authenticity app really costs: per-certificate fees vs flat pricing

The three ways COA apps charge

Browse the category listings on the Shopify App Store and the pricing pages sort into three models. All three are public, which is the one mercy here: nothing below is secret, it is just spread across tabs nobody opens before installing.

Model 1: per-certificate fees on top of a monthly plan

The metered model. You pay a monthly subscription for access, then a separate fee each time a certificate is actually issued. Published rates in the category run around $0.25 per authenticated sale. Some free tiers skip the monthly fee and take a percentage of the sale instead, which on a high-ticket piece is the most expensive sentence in this post. And the monthly plans usually carry issuance caps: around the $30 tier you will see limits like 50 certificates per month, after which you either upgrade or stop certifying.

Metering is easy to build because Shopify's billing API supports usage charges natively, and it is easy to sell because "pay for what you use" sounds fair. Whether it is fair depends entirely on what a certificate costs to provide, which we will get to.

One mechanic worth knowing before you approve a metered plan: Shopify requires usage-based apps to set a capped amount that you, the merchant, approve up front. That cap protects you from runaway charges, which is good. It also means a drop that outruns the approved cap needs a fresh approval from you before the app can bill again, which is one more thing that can interrupt certification in your busiest week. Fair warning applies to the percentage model too: whatever the percentage on a free tier, run it against your actual price point. A 1 percent cut of an $1,800 piece is $18 on one sale, seventy times the $0.25 meter, on the tier that was supposed to be free.

Model 2: credit packs

Prepaid bundles of authentication codes, typically landing between $0.01 and $0.025 per code, with the low end reserved for the largest packs. Per unit this is the cheapest number on any pricing page in the category, and for what it is, it is honest. But read what you are buying: usually a code, a printable label, a scan check. A hosted certificate page with the piece's details, an edition number, a revocation state for returns, and an ownership record is a different product. If all you need is "scan to confirm this code exists", credit packs do that. If you need the certificate to say something, they mostly do not.

Two quieter costs. Prepaid means breakage: codes you buy and never use are margin you donated. And the cheap per-code rate assumes you committed to the big pack up front, before you knew your volume.

Model 3: flat monthly

One subscription, no meter. This is the model we chose for Editioned: $29 a month on Pro covers 50 products, 300 editions per product, and 5,000 editions total, with zero per-certificate fees on any tier. Annual billing brings it to $290 a year. There is a free plan below it and a $79 Studio tier above it; the full grid is on the pricing page. The caps exist, and we will treat them with the same scrutiny as everyone else's fine print in the caps section below, because a flat plan with a low ceiling is just a meter with worse resolution.

The defining property of flat pricing is that the bill is known before the drop. Sell 12 pieces or 1,200, the number on the invoice does not move.

Where per-certificate pricing is genuinely fine

Here is the part a vendor comparison usually skips: at low volume, the meter wins, and it is not close.

Say you are a furniture maker selling three or four certified commissions a month. That is roughly 40 certificates a year. At $0.25 each, your metered fees are $10 a year. If you can get that rate on a tier with no monthly fee, no subscription on the market beats it, including ours. Even Editioned's free plan, which covers 15 editions total with a watermarked PDF, only matches that on price while capping your catalogue.

So the rule at low volume is simple: if your certificate count is a single digit per month and you expect it to stay there, pay-as-you-go is rational. Take it, and ignore the rest of this post until your volume changes.

The pivot is editions. The moment you number a run, your certificate count stops being a trickle and becomes a block: it equals the edition size, and it is decided the day you plan the drop, not the day the orders arrive. A run of 25 is $6.25 in metered fees. A run of 100 is $25, about a month of a flat plan, paid again every drop. A run of 250 is $62.50 per drop before the base plan. Scarcity is the product you are selling; per-certificate pricing converts that exact scarcity into a metered bill. The economics of edition numbering reward you for selling out a run. A meter charges you for it.

Three stores, two bills

Three stores you will recognize, each priced two ways: the metered model at the published category shape ($30 a month base plan plus $0.25 per certificate) and a flat $29 a month ($348 a year, $290 if paid annually).

The art print maker: three drops a year, editions of 250

A print seller running the classic numbered print model: three releases a year, each an edition of 250. That is 750 certificates a year, in three concentrated bursts.

Metered: 750 x $0.25 = $187.50 in fees, plus $360 for the base plan, so $547.50 a year. And that figure is a floor, not an estimate, because a 250-piece drop issues 250 certificates in its first week. A 50-per-month cap does not bend for drop weeks; it forces the next tier up before the first drop finishes. On flat pricing the same year is $348, and a 250 run sits inside Pro's 300-editions-per-product cap with room for artist proofs.

The jewelry maker: 40 pieces a month

A bench jeweler certifying 40 pieces a month, steady, no drops. That is 480 certificates a year.

Metered: 480 x $0.25 = $120 in fees, plus $360 base, so $480 a year. Notice the quieter problem: 40 a month lives one good month away from a 50-per-month cap. The month a piece gets picked up by a gift guide is the month the certification stalls or the plan upgrades. Flat: $348, and the good month costs nothing extra.

The streetwear brand: four drops a year of 100

A brand running numbered streetwear drops: four releases a year, 100 pieces each, 400 certificates a year.

Metered: 400 x $0.25 = $100 in fees, plus $360 base, so $460 a year. Same cap collision: 100 certificates want to be issued in a weekend, not spread politely across two months. Flat: $348.

Three honest footnotes to that table. First, annual flat billing ($290) widens every gap by another $58. Second, the metered totals assume the $30 tier survives your drop weeks, which its monthly cap says it will not, so real metered bills trend higher than the table. Third, the differences look survivable in year one. They compound: the print maker is paying roughly $200 a year, every year, as a tax on selling out, and the tax grows with every drop added to the calendar.

Run your own numbers

Your drop calendar is not our example. Put your own numbers in.

Uncheck the base plan box and you will find the honest crossover: on metered fees alone at $0.25, per-certificate pricing stays under $348 until roughly 1,400 certificates a year. With the base plan included, the way the published plans are actually structured, flat wins at every volume where a flat plan is worth having at all.

What a certificate actually costs to issue

A reasonable person reads "$0.25 per certificate" and assumes the certificate must cost something like that to provide. It does not.

A hosted certificate is a database record, a rendered page, a QR code, and a PDF. We measured our own infrastructure cost per certificate issued, storage and compute included, and it comes out to fractions of a thousandth of a cent. The print maker's entire 750-certificate year costs the platform well under one cent to serve. Bandwidth for people actually viewing certificates is the largest real cost, and it is similarly tiny.

This is not an accusation. Software pricing is about value, not marginal cost, and a $0.25 fee on a $900 print is not what kills anyone. The point is narrower: when a pricing page implies the fee covers the cost of authentication, that framing is wrong by five orders of magnitude. Per-certificate fees are a revenue model that scales with your success. Flat pricing is a revenue model that scales with tiers. Pick with clear eyes, but do not let anyone tell you the meter is there because certificates are expensive.

The one place metering has a real cost story is physical goods: NFC tags, tamper labels, printed holograms. Those cost real money per unit. A hosted page with a QR code you print yourself does not, and what belongs on that page is its own topic, covered in what goes on a certificate of authenticity.

Caps: the fine print that decides your real bill

Every model in this category has caps, including ours, so the useful comparison is not "caps versus no caps". It is what kind of cap, and what happens when you hit it.

Monthly issuance caps are the metered model's second meter. A 50-per-month cap sounds like 600 certificates a year, but editions do not arrive monthly, they arrive all at once. A cap sized for your average month fails in your best week, which is the launch. The failure mode is the worst one available: certification stalls mid-drop, or the plan silently steps up during your busiest 48 hours.

Plan ceilings are what flat plans use, Editioned included. Pro caps at 50 products, 300 editions per product, 5,000 editions total. Studio raises that to 500 products, 500 editions per product, 250,000 total. The honest limitation: if your standard run is 400 pieces, Pro's 300-per-product ceiling means Studio, at $79 a month, is your real price. We would rather say that here than have you find it in a settings screen.

The structural difference between the two cap types is when they bite. A ceiling is checked when you plan: you know at drop-planning time whether 250 fits inside 300, and if it does not, you upgrade once, deliberately, before anything is live. A monthly meter is checked while you sell: it bites during the drop, when the cost of stopping is highest. Caps on a flat plan are a door you walk through on your own schedule. Caps on a metered plan are a tripwire on launch day.

Also worth pricing in: what happens to certificates you have already issued if you downgrade or churn. That is a lifecycle question more than a billing one, and the details of revocation and returns are in the certificate lifecycle post, but the billing-page version is: a certificate a collector is holding should not be hostage to your subscription tier.

How to read a COA pricing page in five questions

Before installing anything in this category, ours included, get plain answers to these:

1. Is there any per-sale or per-certificate charge on the tier I would actually use? Not the tier in the screenshot. The one your catalogue needs. Percentage fees on free tiers count double if you sell high-ticket work.
2. Do the caps fit my best week, not my average month? Take your largest planned edition and ask whether the plan can issue all of it in 72 hours without an upgrade prompt.
3. What exactly is a "certificate" here? A hosted page with edition data, revocation, and transfer is one product. A printable code that confirms its own existence is another. Both are sold under the same three words.
4. What happens at the limit? An upgrade prompt before the drop is a plan. A stalled certification queue during the drop is an incident.
5. What does year two cost at twice the volume? Growth is the plan, so price the plan working. On a meter, success is the expensive scenario. On flat tiers, it is one known step.

If a pricing page makes any of those five hard to answer, that is also an answer. The broader selection criteria, beyond price, are in the complete provenance certificates guide.

And use the trial as a pricing instrument, not just a feature tour. A 30-day trial is long enough to run one real release end to end: assign the editions, take the orders, issue the certificates, process one return. At the end of it you know two things no pricing page tells you: what the app actually issued for your real volume, and what the first invoice after the trial will say. If a vendor's trial is too short to fit one of your drops, that is worth noticing too, because the pricing was designed around a calendar that is not yours.

The short version

Three models: metered per-certificate fees on top of a monthly plan, prepaid credit packs, and flat monthly. At a handful of certificates a month, the meter is genuinely cheaper, take it. At edition volume the arithmetic flips fast: on published category rates, an art print maker doing three drops of 250 pays around $547 a year metered against $348 flat, a jeweler doing 40 pieces a month pays around $480, and a streetwear brand doing four drops of 100 pays around $460, all before monthly issuance caps force tier upgrades in drop weeks. Certificates cost fractions of a cent to issue, so the meter is a pricing choice, not a cost. Whatever you install, read the caps against your best week and price year two before year one.

FAQ

Does Editioned charge any per-certificate fees?

No, on any tier. Free is $0, Pro is $29 a month, Studio is $79 a month, and none of them meter certificates. The caps are ceilings, not meters: Pro covers 50 products, 300 editions per product, and 5,000 editions total, and issuing all 5,000 changes your bill by exactly nothing. There are no per-sale charges, no percentage cuts, and no credit packs to top up.

What happens if I exceed my plan's edition caps?

You hit a ceiling, not a bill. The app asks you to upgrade before it assigns editions past the cap; nothing already issued is touched, and there is no overage fee. If a run needs more than Pro's 300 editions per product, Studio raises that to 500 per product and 250,000 total. The worst case is an upgrade prompt, never a surprise line item.

Is a free COA plan actually usable?

For a small catalogue, yes. Editioned's free plan covers 3 products with 5 editions each, 15 editions total, and the certificates are real hosted pages with QR codes; only the PDF carries a watermark. It is built for testing the flow with real orders and for makers selling a handful of numbered pieces. It is not built for a drop of 250, which is what the paid tiers are for.

When is per-certificate pricing the better deal?

At genuinely low volume. If you sell three or four certified pieces a month, metered fees of a dollar or two beat any subscription, including ours. The crossover comes fast once you sell editions: at 25 cents per certificate, the metered fees alone pass a $348 flat year at roughly 1,400 certificates, and most published metered plans also charge a monthly platform fee on top, which moves the crossover much lower.