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12 min

celld, Explained: Self-Hosting Durable Objects on Your Own Machines

celld from Deno Land runs a Cloudflare Workers application on your own machines: Durable Objects, KV, Queues, D1, Workflows, backed by your own S3 bucket and no control plane. A sysadmin tour of the use cases, the costs, and how the per-entity cell model differs from building on Postgres plus Redis.

15 min

Self-Hosting Your Email in 2026: Is It Still Worth the Pain?

In 2026 the cost of self-hosting email is not the server, it is the blacklist tax: inherited VPS IP reputation, broader sender mandates, and silent non-delivery you cannot see. My sysadmin verdict is that for most people it is no longer worth the pain, plus the narrow cases where it still is, and the relay-based middle ground I recommend instead.

14 min

Best Software for Personal Trainers and Online Coaches Running Their Own Business

The best personal trainer and online coaching software is decided by the pricing model, not the sticker: per-client tiers, add-on stacks for payments, nutrition, and branded apps, transaction fees, and what the export looks like when you leave. An honest comparison of ABC Trainerize, TrueCoach, Everfit, and PT Distinction with real 2026 USD pricing, the per-client math that changes which tier you need, and the checks to run before you sign.