Alternative to Sonitus Compressor

Try kotelnikov, its very nice and free. I dont know compressors with similar gui

Thread on a DX wrapper: http://forum.cakewalk.com/How-to-Use-Cakewalk-DX-and-DXi-in-Studio-One-Really-m3696738.aspx
 
Unfortunately, the compressor is one of the few plugins that didn't work for most people in other DAWs. The good news is it does handle many other favorites, such as TTS-1, Sonitus Multiband Compressor, and MIDI FX. That thread also mentions some other DX wrappers.
 
But if you're going to buy a new compressor, might as well get a good one. Many will suggest FabFilter Pro-C, which you can't go wrong with.
 
Although light years beyond the Sonitus compressor, it happens to also be a good replacement for it, IMO, due to the way it overlays levels onto the threshold knob and the way you can visualize the knee versus signal levels. That was the Sonitus' best quality, that little bouncing ball next to the transfer curve that made it easy to set threshold and knee. Pro-C's kinda pricey, but that's the only downside.

JonD
Reaplugs are Reaper's stock FX, and they remind me a lot of Sonitus in that they're also no-frills, good quality.  Even better, they are FREE (and as VSTs, work in any DAW):
 
https://www.reaper.fm/reaplugs/

Thanks. My main issue was that the Reaper plugins lack the graphical interface I've become accustomed to. I'll just have to learn to use them without! 
 
 

after the sonitus compressor,
which is one of my most used plugs,
 
C1, by waves, is number two, 
and takes on the heavier jobs even better.
 
when using it at 44/48khz, Comp & Gate only, zero latency.
boom.

Dan could sell me anything. And has.
 
I do like Kotelnikov a lot, but specifically as a master-bus compressor. It's a very different animal from the Sonitus Compressor, and as good as it is for busses, not nearly as versatile.
 
I wish I had a free compressor to recommend that comes close to the Sonitus, but I don't. The one in the Meldaproduction free pack is decent, but not in the same league with the Sonitus.

Thanks for all the suggestions.  I will wade through these once I'm back at my laptop.
:)

soens
OK, so everyone's saying Sonitus Compressor doesn't work in other DAWs. I'm trying it in Samplitude and it seems to work just fine for me. And the Surround Compressor seems to automatically block all but 2 channels if your output is stereo.
 
It may be a buffer or other audio setting causing it to malfunction... maybe.

It's not so much a case of not working, as much as simply not appearing in the list of available plugins.  I've tried with both Reaper and Mixbus and it just doesn't show as an available plug-in.

Kuusniemi
The Waves C1 is workhorse kind of plugin: https://www.waves.com/plugins/c1-compressor
The GUI is in the same style as Sonitus.
 
A second vote for ToneBoosters. They're quite good and often overlooked.
 
And lets not forget MCompressor: http://www.meldaproduction.com/MCompressor

That MCompressor looks perfect, and at my favourite price point!  The Waves stuff also looks good, I just can't justify dropping $49 on a single plug-in currently. 
 
Thanks for the recommendations!