The reason is simple: Tesla’s past open source promise around the Roadster fell far short of what “open source” actually means in practice. That release contained only eight files on GitHub plus five document packages locked behind a login — with no proper license, no CAD files, mechanical drawings, bill of materials, firmware source, schematics for the Power Electronics Module, motor design, or pack design. Without a real open-source license, the Roadster release doesn’t grant you rights to copy, modify, or redistribute the designs. So when the company points to that as a model, questions about open source authenticity are inevitable. This article examines the growing gap between Tesla’s open source promise and the concrete reality — and what that means for Tesla credibility moving forward.
The Roadster ‘Open Source’ Release: What Was Actually Included?
To understand the gap between Tesla’s open source promises and reality, look no further than the Roadster “open source” release on GitHub. If you visit the teslamotors/roadster repository, you’ll find a sparse collection of files. The repo contains five CAN database files (DBC files), a 309 MB diagnostic software ISO, and two PDF quick-guides. CAN database files are used for decoding data on the Controller Area Network, which is useful for repair shops and enthusiasts, but it’s a far cry from a full open source release.
What’s more telling is the timing: these DBC files were uploaded nearly a year before Musk‘s announcement, and nothing has been added since November 22, 2023. That means the repository has been stagnant, with no updates or additional resources. This lack of activity raises questions about Tesla’s commitment to the open source ethos.
Equally significant is what’s missing. The release includes no CAD files, mechanical drawings, bill of materials, firmware source, or schematics for critical components like the Power Electronics Module, motor design, or pack design. In total, Tesla’s Roadster release comprised only eight files on GitHub plus five document packages behind a login. For anyone expecting a comprehensive, reusable design, this is underwhelming.
It’s easy to see why this meager offering fuels Tesla open source skepticism. When a company touts open source but delivers such a limited set of files, credibility takes a hit. The gap between the promise and the reality is clear, and it leaves many wondering if true openness is part of Tesla’s future.
Why the Roadster Release Doesn’t Qualify as Open Source
This is where the Tesla open source skepticism really gains traction. If you take a closer look at what was actually posted on GitHub, the problems become clear. The accompanying README file labels the materials under the phrase “Disclosed Research and Development Documents for Roadster.” That wording matters. It’s a legal disclaimer, not an open source license. When you see that phrase, it means Tesla is saying, “Here are some documents for you to look at, but we aren’t granting you any formal rights.”
An open source license, by contrast, is a standard legal tool that explicitly gives you permission to copy, modify, and redistribute the work. The Roadster release lacks any such license. Without that permission, you cannot legally take the designs, adapt them for your own project, or share them with others. This fails to meet the criteria for OSI approval, which requires a clear grant of rights. Instead, what you get is essentially a liability disclaimer—Tesla is simply saying they are not responsible for how you use the documents.
The practical result is straightforward: you can look, but you cannot build. For anyone hoping to use Tesla’s work as a starting point for their own electric vehicle project, this is a dead end. The absence of a proper open source license means the release does not qualify as open source in any meaningful sense. That gap between the company’s messaging and the actual legal terms is exactly why doubts about the company’s commitment to openness persist.
Tesla’s Troubled History with Open Source Compliance
That gap between messaging and legal terms isn’t the only reason for doubt. Tesla’s past record with open source software adds another layer of Tesla open source skepticism. The company has a history of GPL violations that took years to partially address, and that track record makes it harder to take any new promise at face value.
For years, Tesla used Linux-based kernel and Buildroot software in its vehicles without properly releasing the source code as required by the GNU General Public License (GPL). The GPL is a license that mandates anyone distributing GPL-licensed code must also make the source code available to users. Tesla only started publishing that source in 2018, and only after the Software Freedom Conservancy publicly called out the violations. Even then, the Conservancy stated that Tesla’s GPL disclosures were never complete. This pattern of late and incomplete compliance raises serious questions about the company’s commitment to open source principles.
This history of GPL compliance issues undermines trust. When a company only acts after being publicly shamed and still fails to meet full requirements, promises about future open source releases feel less reliable. You might wonder if the latest announcement is genuine or just another PR move. Additionally, Tesla started releasing service manuals and diagnostic tools for free in 2020 after right-to-repair pressure, again showing a reactive rather than proactive approach. For anyone viewing the current open source claims, this track record is a strong reason to be cautious. The Software Freedom Conservancy‘s criticisms specifically highlight the challenge of building open source trust with a company that has repeatedly been on the wrong side of licensing obligations.
What Would a Genuine Open Source Release for Model S and X Look Like?
For the Model S and X announcement to be taken seriously, Tesla must go far beyond the Roadster template. A genuine open source release requires more than a one-time file dump. You need a complete package that allows someone to actually build, repair, or modify the vehicle. That means providing full hardware design files, including CAD files and mechanical drawings. Without those, you cannot replicate the physical parts of the car. A bill of materials is also essential, so you know exactly which components were used. And on the software side, the firmware source and schematics must be included. Without these elements, the release remains incomplete.
A proper open source release also needs an OSI-approved license. Options like Apache 2.0, MIT, or GPL provide clear terms for how the files can be used, shared, and modified. This is a key part of meeting open source requirements, as it protects both the company and the community. Right now, Tesla has not clarified whether it will include these elements for Model S and X. There is no information on what exactly will be open sourced, and no confirmation that a proper license will be attached. This lack of detail fuels the Tesla open source skepticism that surrounds the announcement.
For the announcement to shift from skepticism to credibility, Tesla needs to publish a clear list of what is included. That list should cover hardware design files, firmware source, and a license that meets full open source standards. Until then, the community has little reason to assume this is anything more than a partial release.
The Stakes: End of Production and No Clear Timeline
So the technical scope of the promise is already unclear, but the bigger problem is timing. Tesla ended Model S and Model X production in April of the current year. Musk killed Model S and Model X in January to free up the line for the Optimus robot. That means these vehicles are effectively dead products. You can no longer buy them new from Tesla, and the company’s engineering attention has already moved on to a completely different category of hardware.
This context matters for the Tesla open source skepticism. When a company stops making a product, releasing its open source design files is a logical final step — but only if done promptly. Without a timeline, you have no way to know if the release will happen in months, years, or ever. No explanation of why the Roadster release was so limited was ever provided, which doesn’t exactly build confidence. If Tesla can’t explain why an older, lower-volume model had a restricted open source release, why should you expect something more thorough for the much more complex Model S and Model X?
The lack of a concrete plan turns the announcement into speculation. For anyone considering buying a used Model S or Model X for hacking or repair, the absence of a release date is a practical problem. You might wait months for files that never come, while the Optimus robot consumes all of Tesla’s resources. The stakes here are straightforward: without a timeline, the promise remains just a promise, and the community has every reason to stay skeptical.
Frequently Asked Questions
What would a genuine open source release for Model S and X look like?
A genuine release would include the full source code for vehicle firmware, along with CAD files, wiring diagrams, and repair manuals. You would get a permissive open source license that allows you to modify, share, and reuse the materials freely. This level of transparency would enable independent mechanics and developers to truly understand and improve the vehicles.
Why does the Roadster release not qualify as open source?
The Roadster release lacked a proper open source license and omitted key components like schematics and firmware source code. Without these elements, you cannot freely study, modify, or redistribute the work under standard open source definitions. It was more a partial disclosure than a true open source contribution.
How does Tesla’s history with GPL violations affect trust in its open source promises?
Past GPL violations show that Tesla has not always complied with copyleft license requirements, which fuels Tesla open source skepticism. When a company fails to honor existing open source licenses, it raises doubts about the sincerity of new open source pledges. For trust to build, you need consistent, license-compliant releases that match community standards.
