TL;DR: Every tool here has a free tier you can genuinely operate on, but the free tiers break in different places. Stockpile by Canvus is the only one with no item, user, or location cap — and no barcode scanning at all. Square Inventory gives unlimited free item tracking, with barcode scanning on supported iOS devices, if you already run Square POS — but moving stock between locations requires a paid plan billed per location. Sortly’s free plan stops at 100 items and one user. Zoho Inventory’s free plan stops at 50 orders and 20 purchase orders a month with one user, and its paid Standard tier includes only two. Odoo offers the deepest warehouse model and the slowest start. Two sections further down do the work most comparisons skip: what each tool costs a three-person team in year one and year two, because two of them get significantly more expensive at renewal, and the specific signal that tells you a free tier has stopped being free.
If you run a small business and need inventory software, the gap between a free tool and an expensive surprise usually comes down to limits that vendors do not put on the front of the pricing page: how many items you can hold, how many people can log in, how many orders or purchase orders you can process in a month, and whether moving stock between locations costs extra. This comparison is for owners choosing their first real inventory system and for anyone already running a free tier who suspects they are about to outgrow it. If you are not ready to pay for software at all, our barcode scanner and Excel inventory spreadsheet setup is a lighter workflow worth testing first, and our spreadsheet vs. software guide covers the signals that you have outgrown one.
How we picked these five, and what we could and could not check
Every tool here has a free tier you can operate on indefinitely, not a disguised trial. We excluded Cin7, Fishbowl, and Lightspeed Retail because their entry pricing starts well above the budget range this comparison targets, and their free offerings — where they exist at all — are time-limited trials.
We compared the five against the work a small business actually repeats every week: receiving stock, checking levels, scanning or entering SKUs, counting, raising purchase orders, setting reorder alerts, and handling more than one storage location. The goal was not to identify the most advanced inventory system. It was to find where each free tier stops working and what the next step costs.
What this comparison is based on. This is a documentation-based evaluation. We did not run hands-on trials of these platforms, and nothing below should be read as observed behavior in a live account. Plan limits, prices, and feature gating were checked against vendor pricing pages, vendor plan-comparison tables, and vendor support documentation, most recently in August 2026. Where a claim could not be confirmed from a vendor’s own published material, we have left it out rather than repeating it from a secondary source.
If you want to weigh these tools against criteria specific to your business rather than ours, our software evaluation scorecard turns pricing, setup effort, barcode needs, and workflow fit into a repeatable scoring sheet.
Where each free tier stops working
The most common failure mode is adopting a free tool without checking which ceiling you will hit first. For a solo operator with a photo-heavy catalog, the item cap arrives first. For an online seller, the monthly order cap arrives first. For a business that buys stock on purchase orders, the PO cap arrives before either. For a two-location retailer, the constraint is not a cap at all — it is whether moving stock between locations is a free feature or a paid one.
| Tool | Free tier ceiling | Camera barcode scanning on free | Purchase orders on free | Multi-location on free | What breaks first |
|---|---|---|---|---|---|
| Sortly | 100 items, 1 user, 2 concurrent jobs, 1 custom field | Yes | No — purchase orders start at Ultra | Folders only; no separate location plan gate published | Item count, then the second login |
| Zoho Inventory | 50 orders/month, 20 purchase orders/month, 1 user | No documented free-plan scanning; barcode generation appears on the $129 tier | Yes, capped at 20/month | Free is single-location; Zoho’s pricing and plan-comparison pages disagree on the exact allowance | Order volume, then a second user or location |
| Square Inventory | Unlimited items, $0 per location | Yes, using the built-in camera on supported iOS devices | No — purchase order management is a paid Retail feature | Separate stock per location yes; transfer orders no | The moment you need transfer orders |
| Stockpile by Canvus | Unlimited items, users, and locations | No — Canvus lists barcode scanning as a future separately branded add-on | No dedicated PO workflow | Yes, included | No numeric cap, but stock movements remain manual |
| Odoo Inventory | One App Free: one app, unlimited users | Barcode is a separate Odoo application | Purchase is a separate Odoo application | Yes | The second Odoo app you enable |
Three rows in that table deserve more than a cell. Square is the only tool here that separates “having multiple locations” from “moving stock between them,” and that distinction costs money. Odoo is the only one where the free path itself has two versions that behave differently. And the purchase-order column is the one most buyers discover late: only Zoho offers a genuine PO workflow on a free plan, and it runs out at 20 a month. All three are covered below.
How each tool fits a small operation
Sortly: a one-person visual catalog that outgrows itself quickly
Sortly is built around identifying items by sight rather than by SKU. Each entry supports a thumbnail image, custom folders, and notes, which suits a catalog where the person counting stock recognizes the box before they recognize the code — seasonal retail, equipment, supplies, samples. Scanning runs through the phone camera, so no dedicated hardware is needed. Our Sortly review covers the product in more depth.
The free plan holds 100 unique items and one user license. Sortly counts a unique item as a distinct SKU or product line, so quantities of the same item do not consume the allowance — a boutique with 100 styles and 900 units of stock still fits. Two limits on the free tier are easier to miss: you get one custom field and two concurrent jobs, which constrains how much structure you can add before upgrading. What does not fit at all is a second person. The moment someone else needs to update stock, the free plan is over.
Paid tiers step up in several dimensions at once, which is what makes the upgrade expensive. Advanced is $49 per month at the regular monthly rate and covers 500 items and 2 user licenses. Ultra is $149 per month and covers 2,000 items and 5 user licenses. There is no tier between them, so a three-person team pays the Ultra rate even if it only needs 300 items. Label creation is also tiered: creating QR labels starts at Advanced, and creating barcode labels starts at Ultra. Purchase orders start at Ultra as well, which matters if you buy stock from suppliers rather than simply counting what you already hold.
Sortly organizes stock through custom folders rather than a discrete multi-location feature, and its published plan comparison does not gate folders by tier. A shop with a storefront and a separate storage unit can therefore separate counts by folder on the free plan, but should not expect location-aware transfer or replenishment logic of the kind Zoho and Odoo provide. Sortly also has no POS or accounting integration on the free tier — QuickBooks Online arrives at Premium — which means stock movements recorded in the app have to be reconciled against sales data by hand.
Zoho Inventory: organized around orders, not shelves
Zoho Inventory is the only tool here whose free-tier limit is measured in orders rather than items, and that tells you who it is for. It assumes you are selling across channels and thinking in fulfillment stages. If your inventory problem is “what did I sell and what has shipped,” this fits. If your problem is “what is on the shelf,” the other four are a closer match.
The free plan allows 50 sales orders and 50 invoices per month, 20 purchase orders and 20 bills per month, with one user. Fifty orders is well under two sales a day, combined across every channel you sell on, so this ceiling arrives fast for anyone with real traction. The 20-purchase-order limit is the quieter constraint: a business restocking weekly from five suppliers reaches it without selling anything at all. The Standard plan raises both to 500 orders and 300 purchase orders per month at $29 per month on annual billing, or $39 month-to-month.
The structural advantage is the rest of the Zoho suite. Zoho Inventory connects natively with Zoho Books and Zoho CRM, so inventory, accounting, and customer records can remain inside the same vendor ecosystem. Zoho Inventory is not a POS, so a brick-and-mortar business still needs a separate checkout system alongside it.
Seats are where Zoho’s pricing catches small teams out. The current US pricing page lists Standard at $29 per organization per month billed annually with 500 orders, two users, and two locations. Two users, not three — and the next tier up does not add a seat either, so a third person is bought as a user add-on rather than solved by upgrading. The three-person team modeled below therefore does not fit Standard’s included seats.
Feature gating follows the same pattern of arriving later than buyers expect. Serial number tracking, batch tracking, and the vendor portal appear on the $79 tier. Barcode generation and stock counting do not appear until the $129 tier — two full steps above Standard. If barcode work is the reason you are considering Zoho, the entry price is $129 per month, not $29.
One practical warning before you compare quotes. Zoho publishes these plans on two of its own pages under different names: the pricing page labels the tiers Standard, Professional, Premium, and Enterprise, while the plan-comparison page labels the same four prices Standard, Premium, Plus, and Enterprise. “Premium” therefore means $79 per month on one Zoho page and $129 on the other, and the two pages also state different included-user counts. Confirm the plan by its price and its stated order, user, and location limits rather than by its name.
Square Inventory: free tracking that stops at the loading dock
Square Inventory is the strongest free option in this comparison — provided you already take payments through Square, and provided you never need to move stock between locations. Both conditions matter, and the second one is where most comparisons of this tool go wrong.
The genuinely free part is substantial. There is no item limit, which separates Square from Sortly’s 100-item cap immediately. On supported iOS devices, the Square POS app in retail mode can scan GTIN barcodes through the built-in camera, allowing an iPhone or iPad to serve as both register and scanner. Low-stock alerts, barcode label printing, automatic SKU generation, and stock intake are included at no monthly cost, and Square charges $0 per month per location on the Free plan, so having several locations costs nothing on its own.
Transfer orders are the exception. Creating a transfer order — the bulk workflow for shipping stock between locations with draft, pending, partially received, and completed stages — requires Square for Retail Plus or Premium. Square’s current US support document explicitly lists both tiers, making Plus the lowest published Retail plan for this workflow. At $49 per month per location, two locations cost $1,176 per year before processing fees, hardware, and taxes.
⚠ The per-location catch: Square’s paid plans are billed per location, not per account. Plus is $49 per month per location and Premium is $149 per month per location, so a second store doubles the subscription — source: Square — retail pricing.
Beyond transfers, the paid tiers also hold vendor profiles, purchase order management, unit costs and cost-of-goods-sold reporting, the inventory counting tool, and aging inventory reports. The free tier’s reporting is a current-state view, so a business trying to optimize reorder timing exports to a spreadsheet. And because inventory here is an extension of the payment system, a merchant using a different processor gets very little standalone value from it.
Stockpile by Canvus: no ceilings, no scanner
Stockpile is the only tool in this comparison with no cap on items, users, or locations, and it stays that way. Canvus states that Stockpile is and will remain free to use, funded through separately branded paid add-ons and possibly in-app advertising rather than through subscription tiers. Barcode scanning appears on that add-on roadmap but does not exist in the product today.
What you get is SKU and UPC fields, basic stock-level reporting, and multi-location separation, all in a browser. What you do not get is any way to update stock other than typing. There is no camera scanning workflow and no POS or ecommerce integration, so adjustments have to be reconciled against sales records by hand.
That trade is worth taking in one specific situation: a large catalog that changes slowly. A workshop tracking parts, a nonprofit tracking donated goods, an office tracking equipment across three rooms. If stock turns over daily and the count happens on the floor, the absence of scanning will cost more in labor than any subscription would. If you are in that middle ground where manual entry is tolerable but you still want a reorder warning, our guide to low stock alerts in Google Sheets covers a comparable manual workflow you may already have the tools for.
Odoo Inventory: the deepest warehouse model and the hardest to start
Odoo’s distinctive strength here is its double-entry stock model combined with lot, serial number, and expiration-date workflows. Those traceability features are not unique to Odoo, however: Zoho Inventory also supports serial numbers, batch tracking, and expiry dates on its higher tiers. Odoo is the stronger candidate when the warehouse model and deployment control matter more than a simple order dashboard.
The complication is that “free Odoo” describes two different products. The One App Free plan gives you one Odoo app online, hosted, with unlimited users and no server to manage. The self-hosted Community Edition gives you the open-source codebase and more control, in exchange for provisioning a server and owning its updates, backups, and security patching. These are not two routes to the same place.
Barcode scanning is where the free paths need careful separation. Odoo documents Barcode as a separate application, and Purchase as another. On a One App Free database, Inventory is the one app; enabling Barcode or Purchase means running a second standalone application, which moves the database onto the paid Standard plan. Apps that Inventory requires as dependencies are included, but Barcode and Purchase are not dependencies — they are choices. Odoo’s public documentation does not establish the same constraint for self-hosted Community Edition, where third-party community modules may also change the answer. Verify the exact Community deployment and module set before treating barcode workflows as included.
⚠ The second-app trap: One App Free covers exactly one Odoo app, plus any apps that app depends on. Odoo states that installing an additional standalone application upgrades the database to the Standard plan, so adding Barcode, Purchase, Accounting, or CRM converts a free setup into a per-user subscription — source: Odoo — pricing.
For the paid path, Odoo does not present a plainly readable list price on its pricing page: rates are served by geolocation across regional pricelists, and the displayed figure is an introductory rate rather than the standing one. The US Standard rate is widely reported at approximately $25 per user per month for the first 12 months, rising to roughly $31 at renewal on annual billing. On that basis, three users cost in the region of $900 in year one and $1,120 in year two before taxes or implementation services. Treat these as estimates rather than quoted prices, and check the figure Odoo actually displays to you — a reader outside the US may see a materially different number for the same plan.
What a three-person team actually pays in year one and year two
Single-year cost comparisons flatter two of these tools, because the introductory discount that makes year one cheap does not repeat. The table below models a specific business rather than a generic one, so you can adjust it against your own numbers.
Assumptions: three people who each need their own login, roughly 300 unique items, about 60 orders per month, two stock locations, US pricing, annual billing where a discount is offered, checked August 2026. Payment processing fees, hardware, taxes, and add-ons are excluded.
| Tool | Plan this team lands on | Year 1 | Year 2 | Why the year-2 number changes |
|---|---|---|---|---|
| Sortly | Ultra — Advanced covers only 2 users | $888 | ~$1,430 | The 50% introductory discount applies to the first year of a new subscription only; yearly plans then carry a 20% discount off the $149/month rate |
| Zoho Inventory | Standard, annual billing, plus one user add-on | ~$438 | ~$438 | Standard covers 2 of the 3 modeled users and both locations; the third seat is an add-on reported at about $7.50/user/month. No introductory discount is shown |
| Square Inventory — core tracking only | Free | $0 | $0 | Unchanged as long as transfer orders and purchase orders are not required |
| Square Inventory — with transfer orders, 2 locations | Plus, billed per location | $1,176 | $1,176 | $49/month × 2 locations × 12; a third location adds $588/year |
| Stockpile by Canvus | Free | $0 | $0 | Canvus states that the core Stockpile product remains free |
| Odoo Inventory — Inventory app only | One App Free | $0 | $0 | Holds only while Inventory remains the single enabled app |
| Odoo Inventory — after a second app | Standard, 3 users | ~$900 (est.) | ~$1,120 (est.) | The introductory user rate of about $25 changes to roughly $31 on annual billing after 12 months; Odoo prices by region |
Two rows in that table share a pattern worth naming: the first-year price is a promotion, not the price. Sortly’s Ultra plan costs $888 for the first year and roughly $1,430 for the second — a 61% increase for exactly the same plan. Odoo moves from roughly $900 to roughly $1,120 on the same three seats. Neither is a hidden fee; Sortly states its rule in a pricing footnote and Odoo states that its displayed rate is introductory. They are simply invisible in any comparison that shows year one only, which is most of them.
Square has two sharply different outcomes. Core inventory remains free, but two locations needing transfer orders cost $1,176 per year on Plus. That is higher than Sortly’s first year and Odoo’s paid first year, slightly higher than Odoo’s regular renewal cost, but lower than Sortly’s roughly $1,430 renewal. A three-location Square retailer reaches $1,764 per year.
Odoo’s paid cost is driven by headcount rather than catalog size. Three initial users cost roughly $900 in the first year and roughly $1,120 after the introductory period, and a fourth user adds somewhere near $370 per year regardless of whether the business tracks 300 items or 3,000. Zoho behaves the same way in miniature, charging per seat above two. Sortly’s Ultra plan is the outlier: it absorbs two additional users at no extra cost up to its five-seat limit, which is the one respect in which its higher price buys something back.
The signal that tells you a free tier has ended
Free plans rarely fail with an error message. They fail when someone starts working around them, and the workaround is usually invisible on the invoice. Each of these tools has one dominant early-warning signal, and each has a threshold past which the workaround costs more than the subscription.
| Tool | The workaround people adopt | Switch when | What it costs to wait |
|---|---|---|---|
| Sortly | Sharing one login, or deleting old items to stay under 100 | A second person needs to update stock, or you delete an item you later need history for | Shared logins destroy the activity history that makes the audit trail useful; free-tier history is capped at one month regardless |
| Zoho Inventory | Logging late-month orders manually and backfilling | You cross roughly 40 orders or 16 purchase orders in a month — 80% of the cap, with the month not finished | Backfilled orders break the fulfillment status that is the entire reason to use Zoho |
| Square Inventory | Adjusting stock down at one location and up at the other | You perform more than about two manual location adjustments a week | Two adjustments per transfer means no audit trail and no in-transit state; at $98/month for two locations, the break-even is roughly 4–5 hours of reconciliation a month |
| Stockpile by Canvus | Counting on paper, then typing it in later | Typed entry exceeds roughly 30 minutes a week, or count-to-entry lag exceeds a day | At 30 min/week the annual labor cost passes Zoho Standard’s $348 two-user base subscription at any hourly rate above about $13 |
| Odoo Inventory | Doing purchase orders or barcode work outside Odoo | The second Odoo app becomes genuinely necessary | Nothing gradual — the cost steps straight to roughly $900/year for three users |
The Stockpile and Square rows use the same method and it is worth stating openly, because it is the calculation most upgrade decisions actually turn on. Take the hours per month the workaround consumes, multiply by what an hour of that person’s time is worth, and compare it to the annual subscription. Thirty minutes a week is 26 hours a year; at $13 an hour that is $338, which is roughly Zoho Standard’s $348 base subscription. Below that hourly value, staying free is rational. Above it, you are paying more than the software costs and receiving worse data. These are editorial thresholds built from the published plan limits, not measured results — substitute your own labor rate before treating any of them as a decision.
One threshold is different in kind. Sortly’s second-user limit is not a gradual cost — it is binary, and it arrives at $49 or $149 per month depending on how many items you hold. If you expect a second person within a year, price the Sortly decision at the Advanced or Ultra rate from the start rather than at zero.
Which constraint should decide it for you
You already run Square POS and have one location. Use Square Inventory and stop evaluating. Unlimited items, iOS camera scanning, and low-stock alerts at $0 per month is not a starting point you can improve on by paying someone else. Revisit the decision only when you open a second location or need purchase orders.
You have a large catalog that changes slowly and nobody needs to scan. Stockpile. It is the only tool that will never present you with a cap or an invoice. Accept that every movement is typed, and budget the labor rather than the subscription.
You are one person with fewer than 100 items and you identify stock by sight. Sortly Free genuinely fits, and the camera scanning works on existing barcodes and QR codes without any upgrade. Go in knowing the exit price: the moment a second person needs access, you are choosing between $49 and $149 per month, and the renewal costs more than the first year.
You sell across Amazon, Shopify, and eBay. Zoho Inventory is the most direct fit in this group for channel-based order flow, and it connects with Zoho Books and Zoho CRM inside the same vendor ecosystem. The Free plan’s 50-order ceiling will not last at the modeled volume, but Standard covers 500 orders and 300 purchase orders per month across two locations for $348 per year on annual billing. Budget a user add-on if more than two people need logins, and step up to the $129 tier if you need barcode generation.
You buy stock on purchase orders every week. This narrows the field faster than anything else in the comparison. Zoho Free is the only genuine free PO workflow, and it caps at 20 a month. Sortly puts purchase orders behind Ultra at $149 per month. Square puts them behind Retail Plus at $49 per location. Odoo puts them behind a second app. If POs are central to how you operate, budget for a paid plan from day one rather than expecting a free tier to hold.
You need batch, serial number, or expiration-date tracking. Compare Odoo with Zoho Inventory’s higher tiers rather than assuming Odoo is the only option. Odoo is the better fit for a warehouse-centered double-entry stock model or a deployment you want to control. Zoho is the simpler SaaS path when order channels and the Zoho business suite matter more. If barcode-driven warehouse work is essential, remember that adding Odoo Barcode ends the One App Free setup.
None of these describe you. Start with Stockpile. It is the only option that cannot fail on a limit, which makes it the cheapest way to learn what your real constraint is before you pay to solve the wrong one.
Three steps before you move your catalog
Whichever tool you pick, the import is where the time goes. Work in this order.
- Export and clean your current data first. Pull your existing list into a CSV with columns for item name, SKU, quantity on hand, unit cost, and category. Remove duplicates and settle on one SKU format before you import anything — fixing a naming convention after import is far more work than fixing it in a spreadsheet. Our inventory management checklist covers what your workflow needs to capture before you commit to a structure.
- Import 10 to 20 items and run the full loop. Import, scan if applicable, receive, fulfill, and confirm that a reorder alert fires at the threshold you set. A pilot this small surfaces field-mapping errors, duplicate SKUs, and mobile problems while they still cost minutes. This step matters most in Odoo, where quantity and location entries sit inside a double-entry model and are correspondingly awkward to unwind. If the pilot shows a paid tool is still premature, a free Google Sheets inventory dashboard can run a single-location catalog until one of the free-tier limits in this comparison actually bites.
- Only then move the full catalog. Square users can often skip the import entirely, since items already in the Square POS catalog are already in Square Inventory. For a step-by-step Sortly implementation, follow our Sortly inventory setup guide.
Sources
- Sortly — Pricing — https://www.sortly.com/pricing/
- Sortly — Features — https://www.sortly.com/features
- Zoho Inventory — Pricing — https://www.zoho.com/inventory/pricing
- Zoho Inventory — Plan comparison — https://www.zoho.com/us/inventory/pricing-comparison/
- Zoho Inventory — Batch Tracking — https://www.zoho.com/us/inventory/help/advanced-inventory-tracking/batch-tracking.html
- Square — Retail POS pricing and plans — https://squareup.com/us/en/point-of-sale/retail/pricing
- Square — Create and manage transfer orders — https://squareup.com/help/us/en/article/8300-create-transfer-orders-with-square-for-retail
- Square — Automate item creation by scanning barcodes — https://squareup.com/help/us/en/article/7992-automate-item-creation-with-square-for-retail
- Square — Inventory management — https://squareup.com/us/en/point-of-sale/features/inventory-management
- Stockpile by Canvus — Signup and free-use terms — https://www.thecanvus.com/signup/
- Odoo — Pricing — https://www.odoo.com/pricing
- Odoo — Barcode documentation — https://www.odoo.com/documentation/19.0/applications/inventory_and_mrp/barcode.html
- Odoo — Purchase documentation — https://www.odoo.com/documentation/19.0/applications/inventory_and_mrp/purchase.html
Disclaimer
This guide is for general informational purposes only and does not constitute professional accounting, tax, legal, financial, procurement, or operations advice. Plan limits, pricing, feature gating, and availability were reviewed against publicly available vendor pricing pages, plan-comparison tables, and support documentation in August 2026 and may change without notice. Odoo figures are estimates of US list pricing rather than quoted prices, because Odoo serves rates by geolocation and displays an introductory rather than a standing rate. The switch thresholds in this article are editorial calculations based on published plan limits and stated labor assumptions, not measured results. Check the official vendor page before paying for any plan.
Last reviewed: August 2026 by the PickrTech editorial team. Prices and plan limits verified against US vendor pricing, plan-comparison, and support pages in August 2026.
