Poor results from online labs are often caused as much by workflow as by the lab itself. For more consistent, high-quality prints, use a color-calibrated workflow and choose a lab that provides ICC color profiles so you can soft-proof and prepare files for that specific printer/paper combination.

A useful resource is Dry Creek Photo, which maintains a database of ICC profiles for print services in various countries.

In terms of print technology, many photo labs produce chromogenic prints (often called c-prints). These labs commonly mention well-known photographic papers such as Fujifilm Crystal Archive. If a lab identifies its paper stock and provides profiles, that’s usually a better sign than a generic mass-market service.

So rather than focusing only on brand names, look for labs that:

• provide ICC profiles
• clearly state their print process and paper
• let you control cropping/layout
• avoid automatic color corrections unless you request them

That combination is the best route to archival-looking, predictable results.