Internet Relay Chat is a text-based messaging system where people connect to servers and join channels to talk in real time

Internet Relay Chat, or IRC, is a network protocol that lets users send typed messages to each other over the internet. Unlike email, which waits in your inbox, IRC messages appear instantly in a shared channel or private conversation. You connect to an IRC server using a client program — software on your computer — pick a username, and then join channels (also called rooms) where conversations happen in public, or send direct messages to other users.

IRC has existed since 1988 and was one of the first ways people could chat with strangers in real time online. It still runs today, though most people now use Discord, Slack, or other modern chat platforms instead. But IRC remains active in technical communities, open-source software projects, and niche interest groups where people value its simplicity and low bandwidth use.

Key Takeaways

  • IRC is a text messaging system where you connect to a server, join channels, and see messages from other users appear instantly.
  • You need an IRC client program (like HexChat or mIRC) to connect; the software is free and runs on Windows, Mac, and Linux.
  • Channels are public spaces where anyone in that channel can read all messages, while private messages are one-to-one conversations.
  • IRC networks are independent — Libera.Chat, EFnet, and Undernet are separate networks, so your username and channels exist only on the network you join.
  • IRC uses very little data and runs on old computers, which is why it remains popular in technical communities and for accessing help with open-source projects.

How you connect and what you see

To use IRC, you download and install a client program. Popular choices include HexChat (free, works on Windows, Mac, and Linux), mIRC (Windows, paid after 30 days), and Weechat (command-line based, for advanced users). Once installed, you tell the client which IRC network you want to join — Libera.Chat is the largest and most active network today — and it connects you to one of that network's servers.

You then choose a username (called a nick) and join a channel by typing its name. Channels always start with a hash symbol: #python, #linux, #music. Once you join, you see a list of everyone in that channel and a scrolling conversation. Type a message and press Enter; it appears instantly for everyone in the channel to see. If someone sends you a private message, it opens in a separate window.

The interface is plain text. There are no profile pictures, no notifications, no algorithm deciding what you see. You see messages in the order they arrive, and that is all. Some clients let you customize colors or add plugins, but the core experience is the same as it was in 1995.

Channels, networks, and how they are organized

A channel is a space where multiple people talk about a shared topic. #python is for Python programming questions, #linux is for Linux discussion, #random is for off-topic chat. Channels are created by users, and anyone can start one. Some channels have moderators (called ops) who can remove disruptive users or set rules.

An IRC network is a collection of servers that all talk to each other. Libera.Chat is one network. EFnet, Undernet, and QuakeNet are others. Your username and channels exist only on the network you join — if you register your nick on Libera.Chat, that registration does not carry over to EFnet. Each network is independent, with its own users, channels, and rules.

Some channels require you to register your username before you can join or speak. Registration is free and usually means typing a command like /msg NickServ register password email@example.com. The network then remembers your username and password so you can log back in later.

Why people still use IRC instead of newer platforms

Discord and Slack are easier to use and have better mobile apps, so why does IRC still exist? The main reason is that IRC is lightweight. It uses almost no data, loads instantly on slow connections, and runs on computers from 20 years ago. If you are on a very slow internet connection or using old hardware, IRC works when Discord does not.

The second reason is community. Open-source software projects like Linux, Python, and Apache have used IRC for decades. If you need help with a project, joining its IRC channel often connects you directly to the people who built it. Many projects have moved to Discord or Slack, but some still use IRC because it is what their community knows.

The third reason is privacy and control. IRC networks are decentralized — no single company owns them. Your messages are not stored on a corporate server or scanned for advertising. Some people value that, especially in technical communities where privacy is a concern.

What you can and cannot do on IRC

IRC is designed for text conversation. You can send messages, create channels, set channel rules, and use simple commands to change your nickname or check who is in a channel. Some networks let you set a profile or away message. That is roughly the limit of what the protocol supports.

You cannot send images, video, or files directly through IRC (though some clients have added workarounds). You cannot see when someone is typing, and you cannot edit or delete messages after you send them. There are no reactions, no threads, no search history. If you miss a message, it is gone.

Some channels have bots — automated users that run commands or log conversations. A bot might respond to !weather with the current weather, or !help with a list of commands. Bots are written by users and vary widely in what they do.

How to find channels and communities

Once you connect to a network, you can list all channels by typing /list, though on large networks this produces thousands of results. A better approach is to search online for "IRC channels for [topic]" — many communities publish their channel names on their websites.

For example, if you use Python, the official Python website lists #python on Libera.Chat. If you use Linux, most distributions have an IRC channel. Open-source projects almost always have one. Tech conferences sometimes create temporary IRC channels for attendees.

When you join a channel, read the topic (usually shown at the top) and any pinned messages to understand the rules. Most channels have a code of conduct. If you have a question, ask it clearly and wait — people may be busy and respond later.

Security and safety on IRC

IRC has no built-in encryption, so messages sent over IRC are not private by default. Anyone with access to the network can see them. Some networks and clients support SSL/TLS encryption, which scrambles messages in transit, but not all do. If you are discussing sensitive information, ask whether the channel uses encryption.

Usernames are not verified, so anyone can claim to be anyone else. If someone says they are from the project you are asking about, there is no way to confirm that without additional verification (like checking their account age or asking the project directly).

Scams and spam do happen on IRC, especially in large public channels. Do not click links from strangers, do not download files from people you do not know, and do not share passwords or personal information. If a channel becomes hostile or spammy, you can leave and join a different one.

Frequently Asked Questions

Do I need to pay to use IRC?

No. IRC networks are free to join, and IRC client software is free. Some clients like mIRC ask for a donation after 30 days, but you can use them without paying. Connecting to IRC costs only the data your internet connection already charges for.

Can I use IRC on my phone?

Yes, but the experience is limited. Apps like Colloquy (iOS) and AndChat (Android) exist, but they are not as full-featured as desktop clients. Many people use IRC on desktop and check it occasionally on their phone, or use a bouncer (a program that stays connected and stores messages while you are away).

What happens if I get disconnected?

Your client will try to reconnect automatically. If you stay disconnected for a while, you will be removed from channels. When you reconnect, you rejoin the channels you were in before. Messages sent while you were offline are lost unless someone was running a bot that logged them.

Can I use IRC to get help with a specific software project?

Yes. Most large open-source projects have an IRC channel listed on their website or in their documentation. Join the channel, read the topic and any pinned messages to see if your question has been answered before, and then ask. Response times vary — some channels are active 24/7, others have users only during certain hours.

Is IRC still used by hackers or criminals?

IRC is used by all kinds of people, including some who break the law. But IRC itself is just a communication tool, like email or a phone. The vast majority of IRC users are programmers, open-source contributors, and hobbyists. If you join a legitimate channel for a project or community you care about, you will not encounter illegal activity.