Software platforms with integration of multi vendor mass spectrometer device data?
Some of the MS vendors made their software work with other vendors as well. E.g. ThermoFisher's Chromeleon, Waters' Empower seems to have Data Converters for this. If you already have software bought from your vendors it may make sense to research their cross-vendor capabilities.

There are also pure software companies that build vendor-agnostic tools:


As you mentioned - ACD/Spectrus which has a wide range of vendors supported.
Virscidian's Analytical Studio.
Elsci's Peaksel (disclaimer: I'm one of the developers).


The last two have good support for handling libraries (24, 96, 384, 1536 or more samples per experiment). 

There are also open-source packages and libraries:


OpenChrom, if you don't like something you can contribute or just change it to your own needs.
MZmine2. There's also a repo with MZmine3, but I don't know what's the status there.