Top 5 AI Agent Hosting Platforms for 2026

TL;DR: Modal for GPU-heavy workloads. Trigger.dev for serverless background jobs. Railway for simple Docker deploys. DigitalOcean Gradient for enterprise GPU infrastructure. Nebula for zero-config managed agents with built-in scheduling. Pick based on whether you need GPUs, how much infra you want to manage, and what language you work in. You Built the Agent. Now Where Does It Live? Every AI agent tutorial ends the same way: a working prototype running on localhost. Then reality hits. Your agent needs to run on a schedule, persist state between runs, connect to external APIs, and recover from failures -- all without you babysitting a terminal. The hosting landscape for AI agents looks nothing like traditional web hosting. Agents need persistent execution, cron-like scheduling, API connectivity, memory management, and observability. A static site host will not cut it. I evaluated five platforms across pricing, GPU support, scheduling, framework compatibility, auto-scaling, setup time, a