Its free for sure, and comes with unlimited runtime. CPU & RAM will be limited by normal hardware capabilities of a single server. Storage is unlimited. Some of our free servers run up to 1TB RAM and 64 cores of compute power. This is extremely large unless you are analysing images from the Hubble telescope.

Please do give it a try. Only condition, your code & data must be open source if you want it on the free plan. Else you can take a paid plan. Unlimited part remains the same, but it won’t be free for private use.