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Check out the best alternative tools you can use as a replacement for Who Sponsors Stuff.
Who Sponsors Stuff helps you find your next sponsor by tracking 500+ newsletters and providing direct contract information for 3,000+ email sponsors. And their Sales Pro product gives you and your team the tools to quickly find and reach out to relevant sponsors for your newsletter.
Who Sponsors Stuff supports a bunch of features including market research, and more so any alternative needs to provide similar feature sets.