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2026-05-27
blog.railway.com
ai-infrastructure
PaaS vs IaaS vs SaaS: What Each Means and Who Should Pick What in 2026
Cloud computing has expanded beyond the original three-tier model of IaaS, PaaS, and SaaS, with FaaS and agentic-PaaS now forming five distinct service tiers in 2026. IaaS provides virtualized hardwar…