remove.bg, from Kaleido, has been the specialist in background removal since 2018. The edge quality, especially around fine hair, is among the best available, and it has a developer API plus integrations into Photoshop, Canva, and Figma. The free option gives you a low-resolution preview; full-resolution output costs credits or a subscription. Images are uploaded to its servers for processing.
meraSaaS includes a background remover, but it is one of 26 tools rather than the whole product. It runs an on-device model, so the photo never leaves your browser. Output is full resolution with no per-image credits, and you can keep a transparent background or composite onto pure white. The quality is very good, though remove.bg may still have an edge on the very hardest hair and fur cases.
If you remove backgrounds at volume, need an API or design-app integration, or want the absolute best edge quality, remove.bg is the specialist. If you want private, full-resolution removal without credits as part of a bundle, here is the difference.