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Suga and Fly.io start from very similar premises. Both run your code as always-on containers rather than serverless functions, both treat Dockerfiles and pre-built images as first-class inputs, and both support persistent volumes, raw TCP, WebSockets, and multi-service applications with private networking between them. Because the container side overlaps so heavily, the interesting differences show up around the container rather than inside it: the edge tier in front of it, the regions it can run in, how it scales when idle, and whose infrastructure it runs on. Fly.io runs everything on its own hardware in regions across the Americas, Europe, Asia-Pacific, and Africa, exposes each application on Fly’s Anycast network so requests route to the closest running Machine, and supports auto-stop and auto-start Machines for a scale-to-zero model, with compute metered per second and no workspace fee. Suga runs on managed infrastructure behind Cloudflare’s global edge by default, meters usage as you go, and bundles $20 of hosting credits into every Pro seat before usage charges accrue. On Enterprise, the same control plane can also target a cluster you already run on any cloud or on-premises, so one deployment surface can drive the managed environment, workloads running on your existing cloud footprint, or systems already sitting on-prem. Choosing between them often comes down to where you want your workloads to physically live, since Fly’s own hardware in 18 regions worldwide gives you broad geographic reach at the origin, while a Cloudflare-fronted managed runtime that can also point at your own infrastructure on Enterprise gives you the option to bring your own cluster when that matters.

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How Suga and Fly.io differ

Both platforms run containers with first-class support for state and multi-service topologies, so the interesting differences show up across the compute model, the edge tier, the security defaults, and whether the workload can run on infrastructure the customer already owns.
Fly.io details are drawn from Fly.io’s documentation and pricing. Competitor capabilities change frequently, so check their current docs before making a decision.

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Compute

Both platforms run containers as the primary compute unit, but Fly Machines have higher per-instance resource ceilings on Performance instances, supporting up to 128 GB of RAM and 16 dedicated cores per Machine compared to Suga’s 8 GiB per service and 4 cores on Pro, and Fly’s auto-stop and auto-start behavior also lets Machines scale to zero when idle, at the cost of a short start-up delay when a stopped Machine receives a request. Suga runs containers always-on with no cold starts, meters usage across compute and storage, and includes $20 of hosting credits with every Pro seat that apply before usage charges accrue.

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CDN and Delivery

Fly.io routes requests over its own Anycast network to whichever region has a running Machine closest to the user, so applications deployed in multiple regions serve traffic near their users without a separate CDN, and any caching or compression is handled by the application itself. Suga fronts every proxied domain with Cloudflare, so your traffic picks up automatic Brotli and Gzip compression, L3/L4/L7 DDoS protection, and TLS termination at the edge, with application-level caching controlled through the standard HTTP response headers your container emits. On the compute side, Suga currently runs in 3 GCP regions (Americas, Europe, Asia-Pacific) with more on the roadmap, while Fly operates 18 regions on its own hardware, so the bigger geographic differentiator between the two is where the origin sits rather than what happens at the edge.

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Security Defaults

Fly.io leaves the edge security tier to you, so WAF rules, bot protection, and rate limiting mean putting an external provider in front of your traffic. Suga’s traffic flows through Cloudflare’s proxy, where DDoS protection and TLS termination apply automatically, and a managed WAF is on by default. Suga maintains those rules, which cuts both ways: there is nothing to set up, and no way to write your own rules today. On compliance, Fly.io is ahead today with published SOC 2 Type 2 and HIPAA-compliant workloads available as a paid add-on, while Suga is working toward those certifications but doesn’t publish them yet.

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Compare Suga and Fly.io features

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Choosing between Suga and Fly.io

Choose Suga if you want Cloudflare’s edge tier included by default, per-seat pricing with hosting credits bundled in, and a wider catalog of container-based database templates you run yourself, with the option on Enterprise to run those services on infrastructure you already own on any cloud or on-premises, or choose Fly.io if you need broad geographic coverage on the platform’s own hardware, scale-to-zero via auto-stop Machines, or direct SSH into running instances.

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