POS · Acid Point of Sale
Acid POS
Retail POS built for stores that also sell online, across a lot of specialist verticals.
- Retail
- Ecommerce
- Firearms
An independent assessment. Vigilant can place Acid POS, and is paid the same either way — which is why the drawbacks are on this page too.
What it is
Acid POS is a cloud retail system aimed at brick-and-mortar stores that also sell online and want one inventory rather than two. Its range of named verticals is unusually wide — apparel, sporting goods, hardware, jewelry, tobacco, cannabis, firearms, furniture, garden centres, pet, gift, books, toys, eyewear, electronics and resale among them.
Inventory runs across multiple warehouses with supplier and purchase-order management, which is the part general-purpose POS systems tend to do badly. Sales can run remotely and offline, customer management includes loyalty, and there is a loss-prevention module that ties video surveillance to transactions — a specific answer to shrink at the register.
Hardware comes in three lines: A Series at 22 inches, L Series at 16, and a mobile M Series. Integrations include Magento, Salesforce, Shopify, Oracle and HubSpot, and the vendor states it connects to most ERP and CRM systems.
Who it fits
Best for
Specialist retailers with real inventory depth — multiple warehouses, suppliers, purchase orders — who sell in store and online and are tired of reconciling two stock counts. The regulated verticals it names (firearms, tobacco, cannabis) are ones many mainstream POS vendors decline.
Probably not ideal for
Restaurants and bars, which need table, course and tip handling this is not built for. Also a poor fit for a single-location shop with light inventory, where the setup cost outweighs what it solves.
Key capabilities
- Retail and web in one
- Physical and eCommerce sales against a single inventory rather than two that drift apart.
- Inventory management
- Multiple warehouses, with supplier and purchase-order management attached.
- Customer management
- Customer records with loyalty tracking.
- Sales management
- Remote and offline selling, so the register survives losing the connection.
- Loss prevention
- Video surveillance tied to transactions at the register.
- Contactless
- NFC and RFID processing.
- Multi-store
- Scales across locations under one system.
- Integrations
- Magento, Salesforce, Shopify, Oracle and HubSpot, plus most ERP and CRM systems.
- ACID PAY
- The vendor's own merchant processing, offered alongside the software.
Strengths and tradeoffs
Strengths
- Genuine inventory depth — multi-warehouse, suppliers and purchase orders — which is where most retail POS systems run out of road.
- One inventory across store and web, rather than a sync between two systems that disagree by Friday.
- Serves regulated verticals such as firearms, tobacco and cannabis that many mainstream vendors will not touch.
- Offline selling, so a dropped connection does not close the till.
- Three hardware form factors including mobile, so the counter and the floor can differ.
Tradeoffs
- Pricing is not published, and a quote-only model makes comparison harder than it needs to be.
- ACID PAY is the vendor's own processing — worth asking directly whether you may keep your own processor, and what changes if you do not.
- Retail-only. No table service, coursing or tip flow, so hospitality should look elsewhere.
- The breadth of named verticals is wide enough that you should ask for a reference in your specific trade rather than trusting the list.
Pricing
Not published. A price calculator and instant-quote request are offered instead of a rate card, so the number depends on the conversation you have.
Pricing reflects what the vendor publishes or what we have seen quoted. Your actual terms depend on volume, card mix and what is negotiated — which is the part we do.
Vigilant's assessment
The argument for Acid POS is inventory: multiple warehouses, purchase orders and one stock count shared between the shop floor and the website. If that is your daily problem it is a serious candidate, particularly in a regulated vertical where the shortlist is short anyway. Ask two questions early — what it actually costs, and whether you may bring your own processing rather than ACID PAY.
How it compares
Three retail systems, three different centres of gravity.
| Criterion | Acid POS Inventory-led retail | Korona Retail and inventory | Square Simple and fast to start |
|---|---|---|---|
| Best at | Multi-warehouse inventory with web | Retail inventory and reporting | Getting selling quickly |
| Pricing published | No | Yes | Yes |
| Processor choice | Ask — ACID PAY is offered | Open | Square only |
| Regulated verticals | Named explicitly | Some | Restricted |
Verdict. Square is the fastest to start and the least flexible on processing. Korona publishes its price. Acid POS goes deepest on inventory and is the most likely to serve a regulated trade — at the cost of having to ask what it costs.
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Talk it through with someone who has installed Acid POS — including whether it is genuinely the right fit for you.
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