I current;y use erythritol and/or plain stevia as alternative sweeteners, and don't see any spikes from them. Both are suitable for diabetic use, but you do need to be careful, especially with stevia as due to its extreme sweeteness, there are often less "friendly" fillers (apparently even including actual sugar

) added to allow it to be used in reasonably sized portions. I've generally used Sukrin products, Nunaturals liquid stevia (white squeezy bottle) and recently tried Truvia too after
@bulkbiker mentioned it.
When I was first diagnosed in November 2013 i inirially chose not to use any form of sweetening but later decided mainly as I do a lot of baking that - after some research - erythritol and stevia would be OK. I have a sweetish tooth, and find that for the most part I never actually crave the genuine article! The very few times I've ever done so were when I've had a few very rare false hypos - and my body can definitely tell the difference between real sugar and these two sweeteners.
Robbity