Microsoft Flight Simulator 2024 (MSFS 2024) is designed to ensure compatibility with most third-party add-ons from MSFS 2020, aiming for a smooth transition for developers and users. However, developers have the option to optimize their products to take advantage of new features and enhancements in MSFS 2024, such as improved physics, systems, and graphical fidelity. Some add-ons may require updates or incur small upgrade fees if additional work is done to integrate them fully into the new simulator  .
Microsoft and Asobo have also been in communication with developers, ensuring that the platform remains open and supportive of third-party content. This includes updates to APIs, enhanced modding tools, and improved systems like camera APIs for developers to create more immersive content. However, not all add-ons may be immediately compatible, especially those relying on older systems or unsupported frameworks  .
For users, this means that while most existing content should work, updated versions of certain add-ons may be required to access the full potential of MSFS 2024.
Here is a list with the confirmed developers;
Confirmed Third-Party Developers
Several developers have confirmed their commitment to MSFS 2024, either by updating their existing products or creating new content. Key names include:
• PMDG: Known for high-fidelity airliner simulations, such as the Boeing 737, 747, and 777.
• iniBuilds: Developing aircraft like the Airbus A400M and enhancing gliders.
• Aerosoft: Supporting add-ons like the CRJ and Airbus series.
• Orbx: Focused on airports, scenery, and environmental enhancements.
• Gaya Simulations: Providing updates for airports like Berlin-Tegel and Vienna.
• Working Title: Enhancing avionics with tools like the Primus Epic 2 system.
• Got Friends: Updating unique aircraft like the Optica and introducing new avionics.