If most of your community is customers asking for help, move that part to a public Q&A forum. A forum gives every question its own page. The answer stays on that page for the next person who asks. Another chat app will not fix the problem, because the shape is the same. If your community is mostly people talking in real time, Discord is still a good home for it. Many companies keep Discord and add a forum next to it. This post helps you tell which parts belong where.
What Discord is good at
Discord is free and takes minutes to set up. People are already in it, so they join without learning anything new. Real-time talk works well there. Voice channels, quick reactions, and side chat make a group feel alive. That feeling matters, and a forum does not create it.
None of the problems below are about quality. Discord does the job it was built for. The trouble starts when you ask a chat app to hold your support knowledge.
Why chat is the wrong shape for support answers
In chat, answers move down and out of view. A good answer from Tuesday is a hundred messages up by Thursday. Nobody scrolls that far. So the same question comes back next week, and someone types the answer again.
Search inside chat looks for single messages. A real answer is often four messages from three people, plus a screenshot. Search can find one piece of that. It rarely hands you the whole thing.
Chat is also closed to the outside. A customer with the same problem searches Google at 11pm. Your server is private, so nothing you wrote can help them. They open a ticket instead, or they give up.
New members see the last hour of talk. They do not see what the group already knows. The knowledge is in there somewhere, but no one can reach it.
A test you can run in ten minutes
Open your busiest channel. Read the last 50 messages. Count how many are questions your team has already answered before.
Then do the math out loud. Say 20 of those 50 are repeats. Say each one takes about eight minutes to answer well. That is over two hours a week, spent typing answers that already exist. Run the same count next week to check the number.
If the repeats are a small share, chat is working fine for you. Leave it alone. If half the room is asking questions that were answered before, the shape is costing you real time.
Route by job, not by tool ranking
Most lists of Discord alternatives rank 16 chat apps. That is the wrong question. Ask which job each part of your community is doing, then pick a home for each job.
Real-time hangout stays in chat. Launch days, banter, voice calls, and event chatter all belong there. Discord is good at this and moving it would be a loss.
Customer questions and answers belong in a public Q&A forum. Each question is a page. The best reply gets marked as the accepted answer and pins to the top, so nobody has to read the whole thread. The page keeps working for months.
Private work belongs in your help desk. Billing details, account problems, and anything with one customer's private data need an owner and a due date. A forum should not try to be a ticket queue, and a good one does not.
Forumcat is a hosted community platform built for the middle job. Anyone can read and search it without an account, so a customer gets an answer before they ever sign in. Every answered public question ships QAPage structured data, which is a small block of code that tells search engines this page is a question with an accepted answer. That is how last month's answer starts helping people who never joined your server.

Votes surface what chat buries.
If you want the longer version of this split, see how customer community software differs from a chat server, and what a support forum is meant to hold.
What moving looks like in practice
Do not migrate your history. Years of chat logs are not worth copying, and they would read badly as forum posts anyway. Start with the questions that keep coming back.
Pick 15 of them. Use the count from the test above. Post each one on the forum in the customer's own words, then answer it properly. Write the answer once, and write it well, because this version is the one people will find.
Pin the forum link in your Discord channels. Put it in the channel topic and the welcome message. From then on, answer repeat questions in Discord with a link to the forum thread. If the answer is not there yet, post it there first, then paste the link.

Last month's answer, still findable.
Give it a month before you judge it. The forum starts empty and slow. It gets useful as the pile of answered questions grows, and each one keeps paying off after the day you wrote it.
What you give up
A forum is slower and quieter than chat. That is on purpose, and it is a real trade.
You lose the fast back-and-forth. You lose voice. You lose the memes and the sense that someone is always around. People post less often on a forum, and they wait longer for replies. Some members will never move, and that is fine.
This is why most teams keep both. Discord holds the room. The forum holds the answers. The forum takes the repeats off your chat, which usually makes the chat nicer to be in.
A small first step
You do not need a migration plan. Stand up a forum, answer 15 questions on it, and link to it from Discord for a month. Then look at whether your repeat count went down.
A Forumcat portal on a subdomain is $9 one time, and it takes about five minutes to set up. There is a 7-day free trial with no card. Keep reading: how to build a customer community and how a self-service forum cuts support tickets, and how a public forum creates customer advocates.