A buyer's guide to zero-price software and open-source responsibility
Free open-source POS software: price, rights and real operating cost
A zero-price download is not a zero-cost till. Separate software price from license rights, hardware, setup, backups, support and downtime before choosing any free POS.
Evidence boundary
Reviewed 17 August 2026. Posnic statements on this page are pinned to stable release v1.3.0 and source commit b531ef4. License explanations link to the exact repository license plus GNU, SPDX and Open Source Initiative references.
The page does not promise that Posnic fits every shop, that public source has been independently audited, or that implementation costs disappear. License summaries are educational navigation, not legal advice.
Free of charge and open source answer different questions
Use both questions. Price tells you what the publisher charges for the software. The license tells you what you may do with the code and which conditions follow those rights.
| Question | Free of charge | Open source | Posnic v1.3.0 evidence |
|---|---|---|---|
| What does it describe? | The price charged for access or use. | Rights and conditions defined by a software license. | Desktop release assets are offered at $0; the repository identifies the code as AGPL-3.0-only. |
| Can I inspect source? | Not implied. A free download can remain proprietary. | Source must be available in the preferred form for modification under an open-source license. | Pinned source tree and build instructions are public. |
| Can I modify or redistribute it? | Not implied by price. | The exact license grants these rights subject to its conditions. | Exact AGPL-3.0-only text governs the public code. |
| Is support included? | Not implied. | Open-source rights do not create a response-time promise. | Community help has no SLA; paid support, setup and Cloud services have separate scope. |
| Is operation cost zero? | No. It describes only one price component. | No. License rights do not supply hardware, labor or recovery. | The buyer still owns devices, setup, training, backups, providers, updates and downtime unless a written service covers them. |
What the $0 Posnic desktop release includes and excludes
| Area | Published v1.3.0 position | Buyer check |
|---|---|---|
| Access | Windows, macOS and Linux packages are published without requiring a Posnic account or trial clock. | Check current package sizes, signing status and hashes before installing. |
| Local runtime | The desktop architecture runs a database and API on the till. Posnic reproduced one synthetic local cash sale while external hosts were blocked inside Electron. | Run a real operating-system outage, full shift, close, return and restart test on the target machine. |
| Shipped workflows | The source and UI contain billing, inventory, customer, GST, restaurant/KOT, report and device paths. | Feature presence is not acceptance. Test the exact tax, item, payment, role and hardware workflow the shop needs. |
| Data | Local application data is stored on the shop computer. Export and backup paths are documented. | Keep an off-device copy and prove restoration on a separate clean profile before go-live. |
| Cloud | Device sync, managed off-site backups and remote dashboards are described as optional paid Posnic Cloud services. | Check the current Cloud plan and obtain written scope for any required service. |
| Help | GitHub Issues and Discussions provide community routes without an SLA. Commercial support, migration and custom work are available separately. | Describe the rollout and use a written quote to define tasks, response terms and exclusions. |
The repository governance states that no user, item, sale or branch limits are added to the free edition and that already released AGPL code remains available under that license. Treat those as public project commitments, then verify the exact release you deploy.
Calculate the real cost of a free POS
Compare candidates over the same planning period. A simple monthly view is: recurring costs plus one-time costs divided by planned months, with a separate allowance for realistic downtime and replacement.
| Cost group | What to record | Evidence before approval |
|---|---|---|
| Counter hardware | Till computers, monitors, printers, drawers, scanners, scales, displays, network equipment and spares. | Exact model, warranty, driver, connection, repeated physical test and replacement lead time. |
| Setup and migration | Installation, tax configuration, receipt layout, product/customer imports, opening stock and cutover. | Written scope, source row counts, rejected rows, reconciliation totals and acceptance owner. |
| People | Role setup, training by shift, launch cover, refresher time and administrator ownership. | Named trainees, scenario results, fallback procedure and a person authorized to stop launch. |
| Data protection | Backup media, off-site storage, retention, restore rehearsals and recovery labor. | A clean restore with measured duration and reconciled sales, stock, users and settings. |
| Connected services | Hosting, Cloud, internet, payment gateway, SMS, email, WhatsApp or storage-provider charges. | Provider terms, transaction assumptions, outage behavior, data flow and cancellation route. |
| Maintenance | Updates, dependency review, security work, monitoring, logs and rollback testing. | Supported version, advisory route, maintenance owner, update rehearsal and rollback artifact. |
| Support and changes | Community time, paid support, integrations, custom reports and commercial licensing if needed. | Written response scope, ownership, rates, exclusions and source/license treatment. |
| Failure allowance | Lost counter time, temporary manual process, duplicate reconciliation, replacement hardware and recovery effort. | Observed recovery test, hourly business impact and approved contingency amount. |
No telemetry does not mean no network traffic
The correct question is which connection occurs, why, what data leaves, whether it is optional and who controls the destination.
Update checks
Update checks contact GitHub and necessarily expose the requesting IP address and app version. The published privacy document says they carry no shop data or Posnic-assigned identifier and can be disabled in settings.
First-run database
If an installer does not already contain MongoDB, the app can download it from mongodb.com on first run. Confirm the exact package behavior in the deployment network.
Optional integrations
Email, SMS, WhatsApp, online payment and S3 paths are off until configured. When enabled, data goes to the provider account selected by the operator, under that provider's terms.
Posnic Cloud
Cloud traffic begins when a customer subscribes and signs in. The separate service changes the data-processing and operational boundary, so review its current terms before connecting.
Local responsibility
When records stay only on the till, Posnic cannot recover them after disk loss. Local control must be paired with an off-device backup and a tested restore.
Verify the claim
Read the pinned privacy document, inspect dependencies and observe network behavior during a controlled pilot.
AGPL-3.0-only rights and responsibilities
The SPDX identifier matters: AGPL-3.0-only means version 3 only, not an automatic option to use a later license version.
| Situation | Practical reading checkpoint | Primary source |
|---|---|---|
| Run an unmodified copy | The license affirms permission to run the unmodified program. Keep the license and release provenance with the deployed build. | SPDX license record |
| Modify privately | Private modification is different from conveying copies or offering a modified program for remote network interaction. Facts and intended use determine the obligations. | GNU AGPLv3 text |
| Give or sell copies | Object-code distribution carries source, notice and license conditions. The license permits charging a price and offering support or warranty for a fee. | Sections 4 to 6 |
| Offer a modified network service | Section 13 can require a prominent opportunity for remote users to receive Corresponding Source of the modified version. | GNU network-interaction FAQ |
| Use the Posnic brand | Software rights do not automatically grant trademark rights in the Posnic name or logo. Fork branding needs separate review. | Pinned governance |
| Request a commercial license | Commercial licensing cannot automatically cover code owned by outside contributors. Posnic's no-CLA governance says contributors retain copyright in their work. | Contributor copyright boundary |
The Open Source Initiative notes that open source is more than source visibility: qualifying licenses include rights around redistribution, source, derived works and fields of use. For a business-specific legal decision, give counsel the exact commit, dependencies and intended deployment model.
A practical go-live test for any free POS
Do not make the first live customer the acceptance test. Retain screenshots, exports, hashes, timings and named approvals for each step.
| Step | Test | Pass evidence |
|---|---|---|
| 1 | Download from the official release and compare its SHA-256 value with the published checksum file. | File name, release URL, local hash, comparison result and installer-signing status. |
| 2 | Install on a clean machine using the same operating-system version and user permissions planned for the till. | Elapsed time, prompts, dependencies, warnings and a repeatable setup record. |
| 3 | Load representative products, taxes, prices, customers, opening stock and user roles. | Source totals, imported totals, rejected rows and field-by-field samples. |
| 4 | Complete sales, part payments, returns, voids, discounts, day close and reopening with each role. | Allowed and denied actions, stored records, receipt samples and audit trail. |
| 5 | Disconnect the relevant internet, LAN or host path during sale, print, close and recovery. | Exact failure injected, tasks completed, errors, queued work and duplicate reconciliation. |
| 6 | Use every required physical printer, scanner, drawer, scale and display repeatedly, including reconnects. | Model, firmware, driver, connection, test count, failure count and fallback. |
| 7 | Create a backup, damage or remove the test profile, then restore onto a separate clean environment. | Backup location and hash, duration, restored counts and post-restore transaction checks. |
| 8 | Export products, customers, stock, sales and adjustments and open them in a neutral tool. | Files, encoding, field map, row totals and documented gaps. |
| 9 | Rehearse an update and rollback while preserving data and settings. | Before/after versions, backup, migration result, rollback package and recovery time. |
| 10 | Assign ownership for cashier incidents, hardware, backups, security, providers, tax review and stop/go approval. | Signed responsibility matrix, contacts, escalation path and launch decision. |
Inspect what you will operate
Choose the next evidence
Use the comparison owner when selecting products, the download page for exact release assets, and a written service scope when the rollout needs Posnic involvement.
Free and open-source POS questions
Is free POS software the same as open-source POS software?
No. Free of charge describes price. Open source describes rights granted by a license, including access to source and permitted use, modification and redistribution. A product can be free to use without being open source, and open-source software can still involve paid services and operating costs.
Is the Posnic v1.3.0 desktop release free to download and use?
Posnic publishes v1.3.0 desktop packages and source under AGPL-3.0-only without a Posnic account or trial clock. Hardware, setup, migration, backups, providers, support and downtime still cost money or staff time. Posnic Cloud is a separate optional paid service.
Do I have to publish every private change I make to AGPL software?
Not necessarily. The exact obligations depend on what is modified and how it is conveyed or made available for remote network interaction. Read the full license and obtain qualified legal advice for the intended distribution or hosted-service model.
Can a business charge for installation or support around open-source POS software?
The AGPL permits charging for copies and offering support or warranty protection for a fee, subject to its conditions. Software license rights do not automatically grant rights to use the Posnic name or logo, which are separate trademarks.
Does no telemetry mean the Posnic desktop app never uses the network?
No. Posnic's published privacy document says the stock desktop app checks GitHub for updates, can download MongoDB on first run if it was not bundled, and connects to Posnic Cloud only when subscribed and signed in. Optional integrations contact providers chosen by the operator.
Can I run a shop without paid Posnic support?
The local edition can be evaluated and operated without buying support, but the community queue has no service-level agreement. Before production, name owners for till problems, hardware, backups, updates, data recovery, payment providers and tax acceptance.