Indie Hackers gives you a nofollow link and a community that ignores announcements, which is the correct trade to understand before you look for a replacement. What it is actually good for is being read by other founders when you have revenue numbers or a post-mortem to put in front of them. If that is what you want, you need a place to post. If you wanted the listing, you need a directory. They are not the same search.
Places to post: Show HN puts you in front of the most technically literate audience available for free and the least forgiving; Awesome Indie has around 9,400 makers, though its queue is months long; Sidehunt, MakerHunt and Startup Fast run weekly hunts a small following can win. SaaSsy Board is the closest thing to Indie Hackers outside it, because the listing is a public leaderboard of your monthly revenue. Places to be listed: Peerlist for anything with a portfolio behind it, Buildhop where the ranking runs on watch time rather than votes, IndieHackerStacks which files you under what you built with, and Launch Llama, whose 55,000-founder newsletter is the actual traffic event rather than the page.
Across the 10 platforms on this list, median approval time is 7 days, 5 of 10 give dofollow backlinks, 9 are free to submit. Median domain rating: 42.