Fly.io vs Sevalla

• Fly-io keeps entry-level database hosting lean, starting at $1.94/mo, whereas Sevalla scales much further into high-memory enterprise territory with pricing reaching $3250.00/mo.
• Storage overages are more punitive on Sevalla at $0.30/GB compared to Fly-io’s $0.15/GB, which is a major factor for write-heavy Postgres workloads.
• Egress costs follow a similar trend, with Sevalla charging $0.10/GB for data transfer, five times the $0.02/GB fee found on Fly-io.
• Sevalla offers massive hardware headroom, providing up to 229 GB of RAM and 58.5 vCPU cores, while Fly-io caps out at 16 GB of RAM and 4 vCPU cores.

Fly-io functions effectively for small to medium PostgreSQL deployments where you want to keep data close to the application logic on Firecracker microVMs. Because they operate on a more constrained resource ceiling, you avoid the temptation to over-provision database instances that sit idle. Sevalla sits in a different tier, utilizing hardware that competes with traditional dedicated hosting environments. While the costs for storage and egress are higher, the ability to scale up to 229 GB of RAM makes Sevalla the only viable option here for massive, memory-resident datasets that would crash a smaller Fly-io instance. You are essentially trading the low-cost, lightweight efficiency of Fly-io for the raw vertical scaling capacity required by heavy, high-concurrency production databases.

Fly-io is cheaper for the default baseline workload at $15.76/mo compared to Sevalla’s $65.00/mo. Sevalla becomes the better fit when your database requires more than 16 GB of RAM, as the Fly-io infrastructure cannot support memory-intensive workloads that exceed that hardware limit.