Final Thoughts
All three of these SaaS have some pretty great features, however Swell definitely exceeds both Plutio and Clinked with all they offer. While this is great, sometimes it can actually be bad as some of the features may not be developed to the level they should be. We haven't fully tested all the features with Swell, so we can't comment on if this is the case but they are definitely on course to be an all in one business/client management SaaS.
All three offer basic client/business management, however Clinked does not offer invoicing, contracts, or proposals of any type. When asked, they stated they have no intention of adding these functionalities as they provide integration with JotForm. Clinked also does not support signatures, but does support integrations that do.
While all three support a client login and dashboard, Swell does not currently support White Labeling of the URL associated with it. The good news is that this feature is coming soon.
All three have a mobile app for both iOS and Android, however Clinked is the only one that supports white labeling of that app for an additional cost. The apps for all three allow access to most if not all the features found on the desktop version. Plutio has both a Mac and Windows app, but we aren't sure what this offers over the browser/internet version.
Both Clinked and Swell currently have public API's available for 3rd party devs, while Plutio has one in beta and should be released soon. That's great news for allowing further integrations for these three.