The best alternatives to The Brief are Goodwater Index, Founder Institute, and ESOP. If these 3 options don't work for you, we've listed a few more alternatives below.
For aspiring and idea-stage entrepreneurs up to the challenge, the Founder Institute provides a comprehensive step-by-step program to launch a startup, support from to startup mentors, and a global network of entrepreneurs to help you be successful.
ezVenture is an online platform that democratizes the venture fundraising process. We help first-time founders to increase their chances to get funded by providing a free searchable database (live!), forum (live!) and automated tools (coming soon!).
As easy as Notion, and more informative than DocSend, BriefLink.com simplifies the fundraising process for very busy, high end founders. The beta version quietly helped Founders raise over $4.3B from investors in just 2 years. More than 15k Founders used it.