The best alternatives to Released are Startup Toolkit, Gust, and How To Launch. If these 3 options don't work for you, we've listed a few more alternatives below.
Project management Tool Casual.pm has developed a unique interactive "how to" guides for startups called "Startup Toolkit". The guides are FREE to use.
How To Launch is a playbook by the Upstarters, a company on a mission to disrupt accelerators and democratise launching startups through their tailored 4-week intensive growth/launch programs. They share their strategies here 💯