Best 7 POS Software in 2026

For most small and mid-size businesses, Square is the strongest overall pick in 2026 — it has a genuinely free tier, transparent published pricing, and an official MCP server already in beta. If inventory depth matters more than simplicity, Lightspeed Retail's wholesale ordering and forecasting tools are the better fit.

The seven systems below split into three lanes: transparent, self-serve platforms (Square, PayPal Zettle, SumUp), retail and e-commerce-integrated systems (Shopify POS, Lightspeed Retail), and reseller-distributed or enterprise systems (Clover, Revel Systems). Pricing transparency varies enormously across these lanes — and so does MCP support.

Every price and AI/MCP/API claim below was checked directly against each vendor's own pricing page or developer documentation as of August 2026.

Last updated: August 16, 2026

Editorial disclosure: PickMySoft may earn a commission from some links on this page; our reviews and rankings are independent.

Why You Need POS Software

• A cash register alone can't track inventory or staff sales. Modern POS software ties every transaction to stock levels, employee records, and customer profiles automatically.
• Online and in-person sales need to share one inventory count. Systems like Shopify POS and Lightspeed sync stock across channels so you never oversell an item.
• AI-driven forecasting now predicts what to reorder before you run out. Lightspeed Insights and Square AI both surface reorder suggestions from real sales history.
• APIs connect a POS to accounting, payroll, and marketing tools. Sales data needs to flow into other systems automatically instead of being re-entered by hand.
• MCP support lets AI assistants query sales and inventory data directly. An MCP-connected POS lets an AI agent pull today's sales or check stock without a human running a report first.

How We Evaluated

We scored each system on five factors: pricing transparency and total cost including processing fees, feature depth for inventory and staff management, ease of setup, AI feature maturity, and MCP/API integration depth — weighing officially documented AI/MCP/API support well above unconfirmed or community-only claims.

Best 7 POS Software in 2026

1. Square

Square still sets the bar for transparent, self-serve POS pricing — no sales call required — and it's now running an official MCP server in beta, ahead of nearly every competitor in this list.

Pricing: Free plan available (2.6% + 15¢ in-person processing); Plus is $49/month per location (2.5% + 15¢ in-person); Premium is $149/month per location (2.4% + 15¢ in-person); Pro is custom-priced for businesses processing over $250,000/year.

Top features:

• Square AI (beta) for business recommendations
• Free plan with no monthly subscription
• Built-in loyalty, invoicing, and booking tools
• Advanced reporting and no gift-card load fees on Premium
• Integrated website builder for online selling
• 24/7 phone support on the Premium tier

Pros:

• Fully transparent, published pricing with a real free tier
• Official MCP server already in beta
• Broad built-in feature set beyond just payments

Cons:

• Processing rates run higher than negotiated enterprise merchant accounts
• MCP server is still in beta, not yet a finished product

AI/MCP Integration: Confirmed official MCP server, currently in beta per Square's own developer documentation, alongside a Square AI assistant for business insights.

API Integration: Yes — Square's developer platform publishes comprehensive, well-documented REST APIs.

Best for: small businesses that want transparent pricing, a real free tier, and the earliest official MCP support.

Cloud Based: Yes — cloud-hosted with offline mode for the mobile app.

Platforms: iOS, Android, Square-branded hardware terminals, web dashboard.

Editor score: 4.6/5 — the most transparent pricing and earliest official MCP server in the category, with processing fees as the main tradeoff.

2. Clover

Clover has one of the largest installed merchant bases and app markets in POS, but it's sold almost entirely through bank and processor partners — so unlike Square, there's no single public price list to point to.

Pricing: Not published as a static rate card on Clover's own site — Clover is sold through payment-processor and bank partners, so plan pricing and processing rates vary by reseller and require a sales conversation to confirm.

Top features:

• Large third-party app marketplace
• Purpose-built hardware terminals and mini registers
• Table-service and counter-service restaurant modes
• Employee scheduling and tip management
• Loyalty and gift card programs
• Developer REST API with published documentation

Pros:

• One of the largest app marketplaces in the category
• Purpose-built hardware for counter and table service
• Documented developer API and SDKs

Cons:

• No public pricing — rates vary by reseller and negotiation
• No confirmed official MCP server

AI/MCP Integration: No official MCP server documented as of this writing — only third-party community connectors exist for Clover's API.

API Integration: Yes — Clover's developer platform (docs.clover.com) publishes a documented REST API and SDKs.

Best for: merchants already working with a bank or processor partner who wants a large app marketplace.

Cloud Based: Yes — cloud-connected proprietary hardware terminals.

Platforms: Clover-branded hardware terminals, iOS, Android, web dashboard.

Editor score: 3.7/5 — a huge app marketplace undercut by opaque, reseller-dependent pricing and no confirmed MCP support.

3. Shopify POS

Shopify POS is the natural pick for anyone already selling online through Shopify, since inventory, customers, and orders stay in perfect sync between the register and the storefront.

Pricing: Basic is $39/month (2.6% + 10¢ in-person); Grow is $105/month (2.5% + 10¢ in-person); Advanced is $399/month (2.4% + 10¢ in-person); Plus starts at $2,300/month for high-volume merchants. POS Pro add-on is $89/month per location.

Top features:

• Real-time inventory sync with the Shopify online store
• Sidekick AI assistant shared with Shopify's admin
• Unified customer profiles across online and in-store
• Buy-online-pickup-in-store and ship-from-store workflows
• Staff permission controls on POS Pro
• Same app ecosystem as Shopify's online store

Pros:

• Seamless online-to-offline inventory and customer sync
• Access to Shopify's full app and theme ecosystem
• Lowest in-person processing rate of the group at Advanced+

Cons:

• Advanced retail POS features cost an $89/month add-on
• Only makes sense if you're already committed to Shopify

AI/MCP Integration: Shopify POS inherits Shopify's official Storefront MCP server and Sidekick AI assistant at the platform level; no POS-terminal-specific MCP server is separately documented.

API Integration: Yes — Shopify's Admin API covers POS data alongside online store data.

Best for: Shopify merchants who want their in-person and online inventory to stay perfectly in sync.

Cloud Based: Yes — cloud-hosted, part of the Shopify platform.

Platforms: iOS, Android, Shopify-compatible hardware.

Editor score: 4.3/5 — the best online/offline sync of any tool here, worthwhile mainly for merchants already on Shopify.

4. Lightspeed Retail

Lightspeed Retail is built for merchants who actually manage inventory at scale — wholesale ordering and AI-driven demand forecasting come standard on every tier, not gated behind an enterprise plan.

Pricing: Basic is $89/month (1 register); Core is $149/month; Plus is $289/month. All tiers include a 1.5% card-present processing rate, one register, and full API access.

Top features:

• Lightspeed Insights AI for forecasting and reorder suggestions
• Built-in eCommerce alongside in-store selling
• Wholesale ordering via Lightspeed Wholesale and NuORDER
• Mobile scanner app for stock counts
• Custom workflows and user roles
• API access included on every plan, no upsell required

Pros:

• Deepest retail inventory and wholesale tooling here
• API access on every tier, not just the top plan
• AI forecasting included at every price point

Cons:

• Higher entry price than Square or Zettle
• No confirmed official MCP server

AI/MCP Integration: Lightspeed Insights AI forecasting is confirmed built into every plan. No official MCP server was found on Lightspeed's own site as of this writing.

API Integration: Yes — API access is included on every plan tier, not gated to a higher price point.

Best for: inventory-heavy retailers that need wholesale ordering and demand forecasting built in.

Cloud Based: Yes — cloud-based platform.

Platforms: iOS, Android mobile scanner app, web dashboard; available in the US, Canada, UK, Australia, Ireland, and the Netherlands.

Editor score: 4.2/5 — the strongest retail inventory depth here, with API access on every plan offsetting a higher entry price.

5. Revel Systems

Revel Systems targets multi-location restaurant and retail chains that need enterprise-grade inventory and franchise management, at the cost of a fully custom sales process.

Pricing: Custom quote only — no public rate card was found on Revel's official site during this research; pricing typically depends on register count, locations, and contract length.

Top features:

• Multi-location and franchise management tools
• iPad-native POS hardware with offline mode
• Deep restaurant and retail inventory management
• Enterprise reporting across locations
• Built-in customer loyalty and CRM tools
• Dedicated onboarding and implementation support

Pros:

• Strong multi-location and franchise-management depth
• Offline mode keeps sales running during outages
• Dedicated enterprise onboarding support

Cons:

• No public pricing anywhere on the official site
• No confirmed official MCP server

AI/MCP Integration: No official MCP server documented as of this writing. Note that "Revel Digital," a separate digital-signage product, has its own MCP server unrelated to Revel Systems' POS platform — the two shouldn't be confused.

API Integration: Revel offers developer API access as part of its enterprise platform, though detailed public API documentation is less centralized than Square's or Clover's.

Best for: multi-location restaurant or retail chains that need enterprise franchise management.

Cloud Based: Yes, with offline mode on iPad hardware.

Platforms: iPad-native hardware, web-based back office.

Editor score: 3.8/5 — strong enterprise multi-location depth, held back by fully opaque pricing and no confirmed MCP support.

6. SumUp

SumUp punches above its weight on AI-agent readiness — its own engineering org publishes an official Agent Toolkit MCP server on GitHub, a rarer commitment than most POS vendors this size make.

Pricing: Connect Plus is $199/month; Connect Pro is $289/month, both cloud-based POS plans with a customer database and marketing tools. Standard card-reader processing runs 2.6% + 10¢ in-person and 3.5% + 15¢ online/manual.

Top features:

• AI-enhanced SMS and email promotions on Connect Pro
• Official Agent Toolkit MCP server for AI integrations
• Google review boost automation on Connect Pro
• Customer database with automated loyalty marketing
• Dedicated installation and onboarding support
• Money-back guarantee on both plans

Pros:

• Genuine official MCP server published by SumUp's own team
• Built-in AI marketing automation on the Pro tier
• Money-back guarantee reduces switching risk

Cons:

• Higher fixed monthly cost than Square's comparable tiers
• Smaller feature set outside its POS-plus-marketing focus

AI/MCP Integration: Confirmed official. SumUp publishes its own Agent Toolkit MCP server on GitHub and npm, alongside AI-enhanced marketing automation on the Connect Pro plan.

API Integration: Yes — SumUp maintains a developer API alongside its MCP toolkit.

Best for: small businesses that want built-in AI marketing and genuine official MCP support in one plan.

Cloud Based: Yes — cloud-based POS.

Platforms: iOS, Android, SumUp card readers and terminals.

Editor score: 4.1/5 — a genuinely official MCP server and built-in AI marketing, at a higher fixed monthly cost than Square.

7. PayPal Zettle

Zettle keeps things simple: no contracts, no monthly fee, and funds land in a PayPal Business account within minutes — backed by PayPal's own official MCP server rollout at the parent-company level.

Pricing: No subscription fee. Card and mobile wallet transactions run 1.75%; Zettle Invoice and Payment Links run 2.5%. Card reader starts at £29 (excl. VAT); terminal starts at £149.

Top features:

• No monthly fee or contract of any kind
• Funds available in minutes to a PayPal Business account
• Built-in inventory management and sales reports
• Gift card support at no additional cost
• Multi-channel selling with PayPal checkout tie-in
• Affordable entry-level card reader hardware

Pros:

• No contracts or monthly fees, ever
• Fast fund availability tied to PayPal's network
• Backed by PayPal's own official MCP server investment

Cons:

• Thinner dedicated POS feature depth than category specialists
• No Zettle-specific MCP server confirmed separately from PayPal's

AI/MCP Integration: PayPal, Zettle's parent company, runs an official MCP server rollout for its payments platform, documented on developer.paypal.com. A Zettle POS-specific MCP integration is not separately confirmed as of this writing.

API Integration: Yes — developer access is available through PayPal's broader developer platform.

Best for: very small or mobile sellers who want zero contracts and fast access to funds via PayPal.

Cloud Based: Yes — cloud-based app tied to PayPal's network.

Platforms: iOS, Android, Zettle card readers and terminals.

Editor score: 3.9/5 — unbeatable simplicity and no contracts, though its POS feature depth trails dedicated specialists.

Comparison Table

How to Choose POS Software

• Match the system to your sales volume. Free, transaction-only pricing (Square, Zettle) suits low-volume sellers; flat subscription plans pay off once volume climbs.
• Check whether pricing is actually public. Square, Shopify, Lightspeed, and SumUp publish real rate cards; Clover and Revel Systems require a sales conversation.
• Decide how much inventory depth you need. Lightspeed Retail and Revel Systems go deepest; Square and Zettle stay simpler by design.
• Confirm online/offline inventory sync if you sell through more than one channel. Shopify POS and Lightspeed both handle this natively.
• Check MCP support if AI agents will touch sales or inventory data. Square and SumUp confirm official servers; most others don't yet.
• Factor in multi-location needs early. Revel Systems and Lightspeed both handle franchise and multi-store operations better than single-register-first tools.
• Weigh hardware cost against software cost together. A cheap monthly plan paired with expensive proprietary hardware can cost more than it looks at first glance.

What This Actually Costs: A Worked Example

Take a single-location retail shop processing $20,000/month in card sales. On Square Plus at $49/month plus 2.5% + 15¢ processing, that's roughly $588/year in subscription cost plus about $500/month in processing fees (~$6,000/year). On PayPal Zettle with no subscription and 1.75% processing, the same volume runs about $350/month in fees (~$4,200/year) — cheaper on pure processing, though with fewer built-in retail features. On Lightspeed Retail's Basic plan at $89/month plus a 1.5% card-present rate, that's $1,068/year in subscription plus roughly $300/month in processing (~$3,600/year), landing in between on total cost while adding wholesale ordering Square and Zettle don't offer.

Final Thoughts

Want transparent pricing and the earliest official MCP support? Square delivers both without a sales call. Managing serious retail inventory and wholesale orders instead? Lightspeed Retail's forecasting tools are built for exactly that.

Already selling online through Shopify? Shopify POS keeps every channel in sync without a second system to manage. Running multiple restaurant or retail locations? Revel Systems and Clover both scale there, just expect a sales conversation instead of a published price list. And if you just need to take a card payment with zero commitment, PayPal Zettle asks for nothing but a card reader.