performance-testing
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AppPerfect Corp
For more than two decades, AppPerfect has worked the unglamorous seam between a software demo and a dependable production system. Its bet is simple: test the failure, watch the machinery, and fix the bottleneck before users find it first.
QASource
QASource is a Silicon Valley-based software QA and testing company that gives engineering teams a full quality-assurance department without the cost and hassle of building one. Founded in 2000 by Rajeev Rai, the firm runs a hybrid onsite-offshore model - U.S. management and embedded QA engineers paired with technical talent in India and Mexico - delivering everything from manual, automation, performance and security testing to AI-augmented test automation, LLM evaluation, RLHF tuning, red teaming and RAG application testing. With roughly 1,400 professionals and a client roster spanning startups to Fortune 500 enterprises, QASource has built a reputation on a 95% customer-retention rate and two decades of steady double-digit growth.
ThinkSys Inc
ThinkSys Inc is a global technology services, software engineering, and consulting company founded in 2012 and headquartered in Sunnyvale, California, with delivery operations in Noida, India. It specializes in quality assurance and software testing, QA automation, custom software development, DevOps, and cloud (AWS) consulting, serving 300+ clients across SaaS, FinTech, healthcare, retail, e-commerce, and education. Fully CMMI Level-3 and ISO 27001 certified, the firm pairs an engineering-first culture with a reputation for top-rated client reviews on G2 and Clutch.