QUANT LAB USA INC today launched a free, public developer tools suite covering Stripe fee math, OWASP test coverage, schema.org generation, and additional engineering utilities. The tools are available without signup, login, or email gating, and are intended as a fair-use professional resource for the engineering community.

The suite is hosted at quantlabusa.dev/tools and includes several utilities engineering teams use repeatedly when building production systems. Each tool is designed for the same audience QUANT LAB serves through its consulting work — founders, engineers, and CTOs at small- to mid-market companies who need accurate engineering reference numbers without sales-team friction. The cost-calculator counterparts of these tools are also published as separate consumer-facing utilities at quantlabusa.dev/calculators.

The initial tools suite includes utilities for true Stripe processing-cost calculation across volume tiers, geographic surcharge profiles, and card-present versus card-not-present scenarios; an OWASP Top 10 test-coverage tool that maps a service to current OWASP categories and highlights gaps; a schema.org JSON-LD generator for common content types (Article, FAQ, Product, LocalBusiness); and several engineering reference utilities (slug validators, password-strength scoring aligned to NIST SP 800-63, regex testers calibrated for production use).

Every tool is implemented client-side wherever feasible to eliminate data-transit concerns for users running the tools against production data. Sensitive inputs — passwords, payment metadata, partial schema content — never leave the browser. The codebase for the public utilities is intended to remain stable; QUANT LAB operates the tools as a long-term industry resource rather than a campaign asset, and the firm has committed publicly to maintaining them through 2028 at minimum.

The launch is paired with related editorial coverage on the QUANT LAB blog, including the Next.js Stripe integration guide for the Stripe utility, the 2026 State of Custom Software Development report, and the custom CRM development guide for the CRM-ROI counterpart calculator. Coverage on the security side is linked from the penetration testing services page and the MITRE ATT&CK assessment service.

The roadmap for the second half of 2026 includes additional utilities under public request — the most requested being a SOC-2 readiness scorecard, a HIPAA risk-analysis worksheet, and a Stripe Connect rate modeler for marketplaces. Requests can be sent directly to beltz@quantlabusa.dev.

Founder statement

Every senior engineer has built these utilities for themselves at some point. The Stripe fee math is the obvious one — every team that takes payments rebuilds that spreadsheet at least three times. OWASP coverage tracking, schema generation, NIST-aligned password scoring — same pattern. It is engineering tax that gets paid quietly in every project across every firm. It is the cheapest gift our firm can give back to the community: publish the utilities we have already built for ourselves and stop charging anyone the rebuild tax.
The decision to ship without email gates is deliberate. Half of the value of a free tool is the fact that an engineer can hit it in 10 seconds without filling out a form. The moment you put a form in front of it, you have made it a marketing asset instead of an engineering one. We want these tools to be used. If using them leads someone to read our blog or call us eventually, great. If it does not, also fine — they still served their purpose.
— Bill Beltz, Founder & Principal Engineer, QUANT LAB USA INC

About QUANT LAB USA INC

QUANT LAB USA INC is a Macon, Georgia-based custom software development and cybersecurity firm. The company designs and ships production-grade web and SaaS applications, CRMs, Stripe integrations, licensing systems, and algorithmic trading platforms, and hardens them through professional penetration testing aligned to MITRE ATT&CK. The firm serves clients nationwide from its Macon headquarters. More at quantlabusa.dev.

Press contact

beltz@quantlabusa.dev
(770) 652-1282
Macon, Georgia, United States