Does sweet coffee exist? I am looking for a coffee type that is naturally sweet, like sugar snap peas. So there is no need to add sugar, when I drink it.
This question is probably best answered in two directions:


If you feel the need to add sugar to your coffee, it may simply be that the coffee that you are drinking is not very good. Sugar makes a lot of things taste better in addition to the sweetness that it adds. There are many ways to improve the quality of your coffee, like buying better and fresher beans, grinding right before brewing instead of buying pre-ground coffee, etc. Whether any of that is feasible depends on your coffee drinking circumstances - e.g., if you need to use your office's drip coffee machine with the coffee bought by the kitchen management, there is not a lot that you can do.
If you want to add sweetness because you like it sweet, but you still want to avoid adding sugar for some reason, you can try the following:


There are a couple of coffee bean types that have a slightly sweet flavour. For example, I have a some "Starbucks 2015 Christmas Blend Espresso" here, which is described by the producer by "Cedar and herbal spiciness with an intense caramelly sweetness". When using the beans in a pump-driven espresso machine, the espresso indeed has some sweetness. But don't expect too much. Coffee is natually low-calorie, which means that there can only be a little bit of sweetness. There are some coffee types that are naturally sweeter than others. According to a book that I have, lightly roasted Arabica Bourbon coffee beans should have a "fine sweetness". Panama Volcan Baru Coffee is also listed as particularly sweet. Against, don't expect too much - "particularly sweet" means in comparison to other beans!
In case you prefer to drink your coffee with milk, you may want to switch to lactose-free milk. In that type of milk, the lactose has been split into shorter sugar molecules, which makes the milk taste quite sweet without a noticeable change in calories.