Not sure whether it is truly the "world's strongest coffee", but that is the claim that the folks at Death Wish Coffee are making. The coffee bean that is used in Death Wish Coffee is about 200% stronger than your typical coffee bean.
Oh yeah, the coffee is also organic, kosher, and fair trade to boot.
Our company’s mission was to develop an insanely strong coffee that was dark, highly caffeinated, and very flavorful. Mission accomplished! Introducing, Death Wish Coffee – The World’s Strongest Coffee. Not for the weak. Our special blend of beans are inspected before and after the roasting process to ensure proper roast consistency and bean density. Every aspect of our coffee is optimal for providing a strong, robust, flavorful brew.