AI as a Service Platforms: Market Size & Forecast 2026

The global AI as a Service (AIaaS) market reached USD 18.17 billion in 2025 (base year), driven by explosive demand for generative AI, agentic automation, and multi-modal model access across enterprise, mid-market, and SMB segments. This category spans hyperscaler platforms (AWS Bedrock, Azure AI Foundry, Google Vertex AI), specialized AI clouds (Lambda, Crusoe, Neysa), and emerging sovereign AI providers, with infrastructure services accounting for ~55% of revenue. > **Analyst Take.** The hyperscaler "AI wars" have created a buyer's market for compute, but buyer power remains constrained by specialized model access and agentic AI capabilities. Enterprises can capture 15-20% savings through token-indexed contracts and multi-cloud sourcing, but must balance this against increasing compliance and complexity costs. The most strategic procurement moves are locking 12-18 month volume commitme

Get in touch and our analysts will be happy to help with custom market sizing, deeper segmentation, supplier detail or a bespoke study built for you.