Smallpdf is a Swiss-based document tool company that launched in 2013 and has grown into one of the largest PDF tool platforms on the web, with a free tier (with daily limits), paid Pro and Team plans, native desktop and mobile apps, and a recent round of AI features built on top of the core PDF tools.
meraSaaS is a small bundle of 26 utility tools across categories: PDFs, photos, business documents, calculators, and a couple of utilities. It is not trying to compete with Smallpdf's depth on the PDF side. It is offering a different shape: more tool categories, fewer tools per category, browser-side processing for every tool, and one $7 monthly price that unlocks the 16 paid tools (the other 10 are free with no signup).
If you already pay for Smallpdf and use it daily, this comparison is probably academic for you. If you are looking at meraSaaS as a possible alternative or replacement, here is what is actually different.