# Build Your Own Square Alternative - Tool: Build Your Own SaaS Alternative - Last updated: May 2026 ## TL;DR Square has 4.5M+ sellers and processed $250.5B in GPV for FY2025. The October 2025 plan restructure raised the online rate to 3.3%+$0.30 on the Free plan, and Afterpay BNPL runs 6%+$0.30. No volume discounts until $250K/yr. Building a full POS stack requires EMV certification, PCI-DSS Level 1, and hardware supply chain management — an 18–30 month, $3–8M endeavor. ## Frequently asked questions ### How much does it cost to build a Square alternative? A full Square-equivalent POS and commerce platform built by an agency costs $3M–$8M with an 18–30 month timeline. A focused vertical POS (one industry, using Stripe Terminal for hardware) costs $500K–$1.5M over 8–14 months — the hardware supply chain and EMV certification are the main cost drivers that Stripe Terminal eliminates. ### How long does it take to build a Square alternative? 18–30 months for a full horizontal Square alternative (POS + online store + inventory + employee management + loyalty + payroll). 8–14 months for a vertical POS targeting one industry. The offline POS mode (processing transactions when internet drops) and hardware supply chain (ordering, shipping, support) are consistently the slowest parts of POS development. ### Are there open-source Square alternatives? Odoo POS (48.3K stars, LGPL) covers POS, inventory, and accounting. ERPNext (34.9K stars, GPL-3) includes a POS module as part of its full ERP. Medusa (33.8K stars, MIT) covers online commerce and inventory but not in-person POS. None of these provide hardware integration out of the box — they require custom payment terminal integration. ### Do I need EMV certification to build a POS system? EMV certification is required to accept chip card payments directly. However, Stripe Terminal handles EMV certification for its hardware — using Stripe Terminal readers means Stripe's EMV certification covers your POS. You do not need your own EMV certification as long as you use Stripe Terminal hardware and SDK. Building your own card reader and seeking direct EMV certification would take 6–12 months and cost $500K+ in testing fees. ### What is the PCI DSS requirement for a custom POS? Using Stripe Terminal, your PCI scope is SAQ P2PE (Point-to-Point Encryption) — the simplest compliance path. Stripe Terminal encrypts card data at the reader before it reaches your application, so your application never handles raw card data. Full PCI DSS Level 1 SAQ D (what Square as an acquirer must maintain) is only required if you handle card data directly, which Stripe Terminal specifically avoids. ### Can RapidDev build a custom POS and commerce platform? Yes. RapidDev has built commerce platforms, payment integrations, and inventory management systems for 600+ clients. A Stripe Terminal-based POS is a significant but well-scoped engineering project. The fastest path to market is a vertical POS for one industry rather than a horizontal Square clone. Visit rapidevelopers.com/contact for a free consultation and project scope. ### Why did Square raise its online rate in October 2025? Square's October 2025 plan restructure replaced industry-specific plans (Square for Restaurants at 2.6% online, Square for Retail at 2.6% online) with unified Free/Plus/Premium tiers. The new Free plan applies a single 3.3%+$0.30 online rate regardless of industry, which represented a rate increase for merchants who were on the lower industry-specific plan rates. Plus ($49/mo) restores the 2.9%+$0.30 online rate, which appears to be Square's strategy: use the rate hike to push merchants onto paid plans. ### How does Stripe Terminal compare to Square hardware? Stripe Terminal readers (M2: $59, S700: $349) are comparable to Square's reader ($0–$59) and Terminal ($299). Stripe Terminal supports tap-to-pay, chip, and magstripe. The S700 is a full countertop terminal with touchscreen, comparable to Square Terminal ($299). Key differences: Stripe Terminal requires internet connectivity (no offline mode built-in — must implement yourself), while Square has offline mode built into its POS software. Stripe Terminal hardware is white-label; Square hardware is Square-branded only. --- Source: https://www.rapidevelopers.com/clone/square © RapidDev — https://www.rapidevelopers.com/clone/square