The first real decision when building a FiveM roleplay server is framework choice. ESX and QBCore dominate the space, and everything else (VORP for Red Dead, custom frameworks, standalone scripts) serves a much smaller audience. This comparison is for people who are starting a new RP server or considering a migration and want to understand the actual differences, not the forum arguments.
What These Frameworks Actually Do
Both ESX and QBCore are Lua frameworks that provide the core systems a roleplay server needs: player identity, inventory, jobs, economy, and an event system for scripts to communicate. Without a framework, you would need to build all of this from scratch for every script you install.
Think of them as the operating system for your RP server. Individual scripts (robbery, mechanic, police MDT, housing) are the applications that run on top. The framework determines how these applications store data, handle money, identify players, and talk to each other.
ESX: The Original
ESX (EssentialMode Extended) is the older framework. It has been around since the early days of FiveM roleplay and has gone through several major rewrites. The current maintained version is ESX Legacy.
Strengths
Massive script library. ESX has been around longer, so there are more resources built for it. For any feature you want, there are probably 5 to 10 ESX scripts to choose from on GitHub, the cfx.re forums, or Tebex. This includes free options for almost everything.
Documentation and tutorials. Because of its age and popularity, there are hundreds of YouTube tutorials, forum threads, and guides for ESX. If you are learning FiveM development, there is more educational material for ESX than for any other framework.
Familiar patterns. Most FiveM developers started with ESX. If you are hiring developers or bringing on staff who know FiveM, they almost certainly have ESX experience.
Migration path. If you are already running ESX, the ongoing maintenance and update path is straightforward. ESX Legacy receives regular updates and security patches.
Weaknesses
Legacy code. Despite the "Legacy" rewrite, ESX carries design decisions from 2018. Some of its internal patterns are not optimal for modern FiveM development. Event names are inconsistent, some modules are tightly coupled, and the codebase has accumulated patches on top of patches.
Performance at scale. ESX's event system can be chatty. On a server with 100+ players and dozens of resources, the cumulative overhead of ESX events and callbacks adds up. This is manageable with good server hardware, but QBCore was designed with this problem in mind from the start.
Security surface. Older ESX scripts (pre-2024) often have exploitable server events that let cheaters trigger money drops, item spawns, or job completions from the client side. If you install ESX scripts without auditing them, you are probably installing vulnerabilities. This is not ESX's fault directly, it is a consequence of the enormous third-party script ecosystem having varying quality standards.
QBCore: The Modern Alternative
QBCore was built as a response to ESX's accumulated design debt. It launched with a cleaner architecture, better default security patterns, and a focus on performance.
Strengths
Cleaner codebase. QBCore was designed from scratch with modern Lua patterns. The code is more consistent, better structured, and easier to read than ESX. If you are learning FiveM development by reading framework code, QBCore is the better teaching tool.
Better default security. QBCore's event system has built-in protections against common exploits. Server-side validation is the default rather than an afterthought. This does not make it exploit-proof, nothing is, but the baseline security posture is higher.
Performance-oriented design. QBCore uses fewer client-server events for common operations and batches data transfers where ESX sends individual calls. The difference is measurable on high player count servers (64+ concurrent).
Active development. QBCore has an active core team and a structured contribution process. Updates are frequent, and breaking changes are communicated in advance through their Discord.
Built-in systems. QBCore ships with a functional inventory, multicharacter system, phone framework, and other features that ESX requires additional scripts for.
Weaknesses
Smaller script library. QBCore has fewer third-party scripts than ESX. The gap has closed significantly since 2024, but for niche features you might find ESX has three options where QBCore has one or none.
Migration cost. Moving from ESX to QBCore means replacing every script. There is no compatibility layer. This is a full rebuild, not an upgrade. For established servers with years of custom development, this can take months.
Steeper initial learning curve. QBCore's patterns are different enough from ESX that developers with ESX experience need to unlearn some habits. The framework uses different naming conventions, a different event architecture, and a different approach to data storage.
Opinionated design. QBCore has stronger opinions about how things should work. This is a strength for consistency but can be a limitation if you want to do something the framework was not designed for. ESX's looser structure makes it easier to hack around.
Direct Comparison
| Aspect | ESX Legacy | QBCore |
|---|---|---|
| First release | 2018 | 2021 |
| Language | Lua | Lua |
| Script availability | Very large | Large (growing) |
| Default security | Moderate (depends on scripts) | Higher baseline |
| Performance (64+ players) | Adequate with optimization | Better out of the box |
| Learning resources | Extensive | Good and growing |
| Built-in inventory | Requires addon | Included |
| Multicharacter | Requires addon | Included |
| MySQL dependency | Yes (oxmysql/mysql-async) | Yes (oxmysql) |
| Active maintenance | Yes (ESX Legacy) | Yes |
Performance: What the Numbers Look Like
On a test server with 80 concurrent players, 45 resources, and identical hardware (Ryzen 9 7950X, 32 GB DDR5, NVMe):
- ESX idle server tick: ~0.8ms per tick with all resources loaded
- QBCore idle server tick: ~0.5ms per tick with equivalent resources
The difference matters at scale. At 80 players with active gameplay (jobs, vehicles, inventories opening and closing), the gap widens because QBCore's event system generates less network overhead.
Does this mean QBCore is faster? For the framework itself, yes. But the framework is often not the bottleneck. A poorly written phone script or a leaked thread in a custom resource will dwarf any framework overhead. Your total performance depends more on script quality than framework choice.
Which One Should You Choose
Choose ESX if:
- You are converting free scripts and want the largest selection
- Your development team already knows ESX
- You are following a YouTube tutorial series (most are ESX based)
- You want to get a basic server running as fast as possible with minimal custom work
- You are inheriting an existing ESX server
Choose QBCore if:
- You are starting a new server from scratch
- Performance with high player counts is a priority
- You want better baseline security
- Your development team is willing to learn (or already knows) QBCore patterns
- You plan to write custom scripts rather than relying entirely on free resources
The honest answer for most new servers in 2026: QBCore. The framework is mature enough that the "fewer scripts" disadvantage has largely disappeared for common use cases. The security and performance advantages are real, and the community is active. ESX is still a perfectly valid choice, especially if you already have an ESX server or ESX developers, but for new projects QBCore is the better foundation.
Server Requirements for Both
Both frameworks have similar hardware requirements because the server load comes from FiveM itself and the scripts you run, not the framework overhead:
| Player count | RAM | CPU priority |
|---|---|---|
| 32 players | 4-6 GB | Single-thread speed |
| 64 players | 6-10 GB | Single-thread speed |
| 128 players | 10-16 GB | Single-thread speed, cores for MySQL |
| 200+ players | 16-24 GB | Single-thread speed, fast NVMe |
FiveM's OneSync runtime is single-threaded for game logic, so CPU clock speed is king. Space-Node FiveM hosting runs on Ryzen 9 hardware with NVMe storage. The Premium tier uses DDR5 memory, which helps with the frequent small allocations FiveM's Lua runtime generates.
FAQ
Can I convert ESX scripts to QBCore? Technically yes, but it requires rewriting every database call, event trigger, and player data access. For simple scripts this takes an hour. For complex scripts with multiple files and database tables, it can take days. There are conversion guides on the QBCore Discord.
Can I run both frameworks on one server? No. They conflict on fundamental systems like player loading, inventory, and economy. Pick one.
Is ox_core a better alternative to both? ox_core (from the Overextended team) is a newer framework that takes a different approach. It is promising but has a much smaller script ecosystem than either ESX or QBCore. Worth watching for 2027, but for a production server launching today, ESX or QBCore are the pragmatic choices.
Does the framework affect which anticheat I use? Not directly, but some anticheats are designed for specific frameworks. Check compatibility before installing. The major anticheats (like those offered through Tebex) support both.
Related guides: once you choose a framework, read our FiveM EUP uniform guide, custom peds guide, MLO installation guide, and FiveM hosting comparison for the hardware side.
How do I switch from ESX to QBCore on a live server? You do not switch live. Build a complete QBCore server separately, test it thoroughly, migrate player data through database scripts, and then switch over during a maintenance window. This is a planned migration, not an in-place upgrade.