PFLB

PFLB is a performance and load testing company. Since 2008, PFLB's 150+ performance engineers have run load, stress and reliability testing for 300+ companies: banks, retailers, SaaS vendors and public sector systems, including KFC, Moody's, Tinder, Samsung and E.ON.

PFLB finds the limit of a system before its users do. Load profiles are built from real traffic, peak conditions are reproduced on a test bench, and the bottleneck is reported with numbers: which component gives way, at what concurrency, and what it takes to fix.

Typical engagements: core banking under seasonal peaks, e-commerce before a launch or a sale, cloud migrations, and independent benchmarks commissioned by vendors who need an unaffiliated lab to measure their own product. Chainguard commissioned PFLB to benchmark eight databases on ARM and x86 against standard equivalents. The OrioleDB team commissioned a measurement of their storage engine against vanilla PostgreSQL on identical hardware. PFLB publishes the method and reports negative findings alongside positive ones.

Performance testing is PFLB's full-time specialty, backed by its own cloud load testing platform with AI-assisted script generation and AI-analyzed reports. For Tynor, India's largest maker of orthopaedic aids, a site found to be far slower than it needed to be four days before launch was tested and fixed inside those four days.

SOC 2 Type II and ISO 27001 compliant, headquartered in Wilmington, Delaware. 37 published case studies with the numbers are at pflb.us/cases/