DonorSearch is an online database of donors and prospects providing intelligence on donor wealth and capacity for giving, from the company of the same name in Marriotsville.
Salsa Engage provides a robust interface to Salesforce--our primary CRM--allowing non-intervention synchronization to categorize supporters into groups for email communication. As we are only six months into our implementation, we have not found areas where it's not appropriate to use beyond nit-picky synchronization delays and smart group updates.
I would say DonorSearch is well suited as you set out to build donor profiles. I think there are excellent background information on spouses, addresses, real estate holdings, giving priorities, etc. I also like it for grant research - you can find funders who may be interested in your philanthropic priorities and occasionally what those timelines are. I would not suggest using this for absolute strangers to your organization - too much to work through.
Very clean interface and easy to navigate based on labeling. Also, the onboarding process is very easy to follow and understand! DonorSearch also does weekly webinars that help and are insightful when looking to learn new things about the system
Support response has been swift and knowledgable, though not always the answer I've wanted. One huge design flaw is if I add a new Salesforce field to sync, Salsa Engage will not sync it unless it has changed since the last sync, requiring me to fake an update for an entire database or re-sync the whole enchilada. Better to recognize it's a new Salesforce field and perform the sync en masse.
Salsa Engage is one of the easier products to set up and use, but with that comes limitations. If you want something simple, this works, but if you have more complex needs, then you'd be better off investing in another system that requires more set up work, but provides more customization and robust reporting opportunities.