Fly.io leads global edge deployment against Railway and Northflank

Fly.io edge dominance

Fly.io leads in global distribution through more than 35 regions. The company closed a $25 million Series D funding round in July 2026 with participation from Dell Technologies Capital and Intel Capital, while Andreessen Horowitz, EQT, Geodesic, and YC also contributed. More than 8,000 of its 37,000 customers build agent-native applications. Revenue from the largest agent-native customers grew 12 times over the last 12 months. Agent-first companies like Firecrawl, Kilocode, and Plastic Labs use the platform for production AI applications. Fly.io uses Firecracker microVMs to run code near users. The platform provides low-latency routing via an Anycast network. The company provides servers in locations like Tokyo, Sao Paulo, Amsterdam, London, and Singapore, alongside Dallas, Ashburn, and Los Angeles.

Fly.io scales massively.

The platform uses BGP Anycast to route traffic and WireGuard for secure communication. Kurt Mackey notes that developers often struggle to find a clear path for edge deployment. You must manage database costs carefully. The managed Postgres product starts at $38 per month for the Basic plan and goes up to $1,922 per month for the Performance plan. Storage for these databases costs $0.28 per GB for a 30-day month. Self-running an unmanaged Postgres instance on Fly Machines costs about $3.50 per month. Fly.io also provides managed SSL via Let’s Encrypt for $0.10 per month per single-hostname cert or $1 per month for wildcard certs. When an application instance starts, the three-letter name for the region is stored in the Machine’s FLY_REGION environment variable.

Compute and database costs

Fly.io bills for started Machines every second. Railway combines a flat monthly subscription with usage-based billing. Railway’s Hobby plan starts at $5 and its Pro plan starts at $20. Railway charges $10 per GB of RAM and $20 per vCPU per month for excess usage. Egress on Railway costs $0.05 per GB.

Northflank uses a pay-as-you-go model. Its free sandbox tier includes two free services and one free database. Northflank provides 600 plus regions through Bring Your Own Cloud. Northflank operates at 99.99% historical uptime and provides SOC 2 Type 2 compliance. Northflank provides built-in CI/CD, observability, and infrastructure-as-code templates. Northflank scales compute from 0.1 vCPU to 32 vCPU and memory from 256 MB to 256 GB. Northflank provides deployment to managed cloud, bring-your-own-cloud, or a customer’s VPC. Railway lacks an automatic spending cap. This lack of a cap makes costs hard to predict. Railway provides variable and secrets management. Railway’s volume storage costs $0.15 per GB per month.

Infrastructure control and scaling

Fly.io operates through the flyctl command-line interface. This CLI-first model requires more DevOps effort than the Railway dashboard. Railway allows one-click deployment from a GitHub repository. Northflank provides 6 managed cloud regions including US-Central, US-East, US-West, Europe-West, Asia-Pacific, and Asia-Southeast. Fly.io uses its own hardware in 35 plus regions.

Fly.io provides Kubernetes support.

Fly.io provides 35 regions.

Northflank provides infrastructure-as-code templates. Its pay-as-you-go tier bills compute at $0.01667 per vCPU per hour. It bills memory at $0.00833 per GB per hour. Railway reports recurring incidents across builds, deployments, and networking. You must watch your egress. Egress on Fly.io costs $0.02 per GB in North America and Europe, $0.04 per GB in Asia, and $0.12 per GB in Africa and India. Dedicated IPv4 costs $2 per month. Static egress IPs cost about $3.60 per month. Fly.io provides a managed Prometheus-compatible metrics service with managed Grafana dashboards. Northflank provides deployment to AWS, GCP, Azure, Oracle Cloud, CoreWeave, and Civo. Does scaling to millions of instances introduce latency?