Assetto Corsa server hosting for races and freeroam
Run your own Assetto Corsa server for league nights, practice or cruising with friends. Use Kunos’ official acServer with your cars and tracks, or the community AssettoServer for freeroam with AI traffic and dynamic weather.
- Official acServer from Kunos Simulazioni
- AssettoServer for freeroam with AI traffic
- Your cars, skins and tracks in entry_list.ini
- Custom Shaders Patch weather and rules
- SlotsEvery [CAR_X] entry is a slot with its model and skin. Match the server capacity to the number of cars.
- One per car in entry_list.ini
- PortsBoth must be reachable, or the server cannot register in the Kunos lobby.
- 9600 TCP/UDP · 8081 TCP
- Config
- server_cfg.ini · entry_list.ini
- Server software
- acServer · AssettoServer
- Weather
- Presets or CSP WeatherFX
- Platform
- PC (Steam)
Server types
- acServer
- AssettoServer
- Freeroam
- AI traffic
- Custom Shaders Patch
- Content Manager
Game facts from SteamCMD data for Kunos’ dedicated server and the AssettoServer documentation, checked in October 2026.
- DDoS protection
- 20 game server locations
Assetto Corsa plans are being prepared
Tell us whether you run races or freeroam, how many cars and which tracks, and our team will reply with the options. Or open a ticket and we will let you know when the plans are online.
How big should an Assetto Corsa server be?
Car slots, AI traffic and the size of your track mods decide the load. Freeroam servers with traffic need the most.
Find your size
| Feature |
Club race
Up to 16 cars
|
Recommended Full grid
Up to 30 cars
|
Freeroam
AssettoServer with AI traffic
|
|---|---|---|---|
| Memory (RAM)Working memory for the world, the players and every mod. Leave headroom: memory use grows as players explore. | 1 GB | 2 GB | 4 GB+ |
| CPU coresA race server is light; AI traffic on a freeroam server is computed on the server and needs more CPU. | 1–2 | 2 | 3–4 |
| Disk spaceThe server program is small; the space goes to the car and track data you upload. | 5 GB | 10 GB | 20 GB |
| Typical use | League and club races | Full grids with mod cars | Cruising servers with traffic and weather |
-
Club race
Up to 16 cars
- Memory (RAM)Working memory for the world, the players and every mod. Leave headroom: memory use grows as players explore.
- 1 GB
- CPU coresA race server is light; AI traffic on a freeroam server is computed on the server and needs more CPU.
- 1–2
- Disk spaceThe server program is small; the space goes to the car and track data you upload.
- 5 GB
- Typical use
- League and club races
-
Recommended
Full grid
Up to 30 cars
- Memory (RAM)Working memory for the world, the players and every mod. Leave headroom: memory use grows as players explore.
- 2 GB
- CPU coresA race server is light; AI traffic on a freeroam server is computed on the server and needs more CPU.
- 2
- Disk spaceThe server program is small; the space goes to the car and track data you upload.
- 10 GB
- Typical use
- Full grids with mod cars
-
Freeroam
AssettoServer with AI traffic
- Memory (RAM)Working memory for the world, the players and every mod. Leave headroom: memory use grows as players explore.
- 4 GB+
- CPU coresA race server is light; AI traffic on a freeroam server is computed on the server and needs more CPU.
- 3–4
- Disk spaceThe server program is small; the space goes to the car and track data you upload.
- 20 GB
- Typical use
- Cruising servers with traffic and weather
Kunos publishes no server hardware figures. These starting points are derived from the small server install and common race and freeroam setups; large track mods need more disk.
acServer, AssettoServer and CSP
Choose the server software that fits your nights: official races or community freeroam.
Official acServer
Kunos’ Assetto Corsa Dedicated Server (Steam app 302550) runs practice, qualifying and race sessions and registers in the Kunos lobby.
AssettoServer
A community server built for freeroam, with AI traffic from fast_lane.ai splines, Steam authentication, plugins and Windows and Linux builds.
Custom Shaders Patch
Require a minimum CSP version to join, and use WeatherFX for smooth weather changes on AssettoServer.
Cars and skins
entry_list.ini lists every car slot with its model and skin; server_cfg.ini sets the track, time and weather.
Admins and whitelist
On AssettoServer, admins listed in admins.txt can kick, ban, send cars to the pits, change time and weather and whitelist Steam IDs.
Set up your Assetto Corsa server
Four steps from the pit lane to a full grid.
-
Choose races or freeroam
acServer for sessions and results, AssettoServer for freeroam with traffic. Then pick the size from the table above.
-
Pick a location
Choose the one closest to your drivers from our 20 game server locations; low ping matters on track.
-
Upload cars and tracks
Add the track to the content folder, list your cars in entry_list.ini and set the sessions and weather in server_cfg.ini.
-
Join from the lobby
Find the server in the online list or Content Manager, or share the server’s invite link.
Other game servers you might like
Frequently asked questions
Which ports does an Assetto Corsa server use?
TCP and UDP 9600 for the game, and TCP 8081 for the HTTP port. If the log shows “INVALID SERVER, CHECK YOUR PORT FORWARDING SETTINGS”, the registration in the Kunos lobby failed because a port is not reachable.
What is the difference between acServer and AssettoServer?
acServer is Kunos’ official dedicated server for practice, qualifying and race sessions. AssettoServer is a community project built for freeroam: it adds AI traffic, Steam authentication, CSP weather and plugins, but it does not support race and qualifying sessions with lap times yet.
How many cars can join?
One per entry in entry_list.ini. Each [CAR_X] entry sets the car model and skin of a slot, so the number of entries is the number of drivers who can join.
Can I use mod cars and tracks?
Yes. Upload the track to the server’s content\tracks folder and add the cars to the entry list. Every driver needs the same cars and track installed in their game to join.
Can I require Custom Shaders Patch?
Yes. Set a minimum CSP version for joining, for example through Content Manager’s Require CSP to join option. Dynamic weather on AssettoServer needs CSP 0.1.76 or newer.
Can I run freeroam with traffic?
Yes, with AssettoServer. Turn on EnableAi in extra_cfg.yml, add the track’s fast_lane.ai or fast_lane.aip spline and mark the traffic slots as AI in entry_list.ini.
How do I manage players?
On AssettoServer, admins use chat commands such as /kick, /ban, /pit, /settime, /setweather and /whitelist. Steam IDs in admins.txt are logged in as admins automatically.
Which operating systems does the server run on?
The official server from Steam (app 302550) is a Windows program, acServer.exe. AssettoServer has builds for Windows and Linux.
Do I need Content Manager?
No, but most drivers use it. Content Manager is a community launcher that lists servers, joins them by invite link and checks the required CSP version.
Ready for your own grid?
Tell us your cars, tracks and race format, and we will help you pick the right Assetto Corsa server.