Are young developers the driving force behind open-source AI?

By Erin Yepis, Senior Analyst, Market Research and Insights, Stack Overflow.

As AI adoption accelerates, the choice between open and closed source models is becoming central to how the industry evolves. Open-source projects have long been the bedrock of internet innovation, championing transparency and community collaboration. Today’s open-source tools are making AI more accessible, sparking innovation, and driving change. Even OpenAI's Sam Altman has acknowledged the limitations of a purely closed-source approach, hinting at a more open strategy on the horizon.

Developers and technologists are increasingly weighing in on the debate, revealing clear preferences and a generational divide that is shaping the future of AI. To dig deeper, we conducted a survey of over 1,000 developers and technologists around the world to better understand their motivations and preferences when it comes to open and closed source technologies.

The findings were compelling: open-source AI is a boon for experienced developers who thrive on its transparent, collaborative nature. Younger developers also show a strong preference for open-source tools, valuing them as reliable resources for learning and experimentation. Unsurprisingly, the majority (82%) of respondents claimed to have some or a great deal of experience with open-source tech. Stack Overflow’s Q&A trends data supports this: 40% of the top 1,000 tags in the past year were related to open-source technologies: popular tags for open source include Python and Flutter, while popular tags for proprietary tech include C# and Android.

Interestingly, early-career developers seemed to lack clarity about their open-source experience. Among those with less than five years in the field, 12% reported no open-source experience, and many were unsure if they had used open-source tools at all - suggesting the use and influence of open-source can sometimes go unnoticed.

Open-source takes the lead with engagement

Most respondents preferred open-source activities compared to proprietary when asked to rate how much they liked engaging in them. Giving feedback on open-source projects topped the list of activities (57%), followed by participating in online communities (50%), and interacting with AI chatbots (49%). Conversely, respondents did not like contributing to closed-source models (37%), interacting with AI companies (30%), and using proprietary tools for school or work (27%).

Our data also demonstrated several pointed generational differences: respondents aged 20–34 reported more positive engagement across the board, particularly with AI chatbots. Users in the 35–54 age group were more likely to express a dislike for proprietary tech, indicating that conversational interfaces and collaborative platforms resonate more strongly with younger users.

Building trust in AI

Open-source AI outshines proprietary models when it comes to trust. 66% of respondents trust open-source AI for personal or school projects, while 61% trust it for development work. Proprietary AI lags behind at 52% and 47% for those same categories, respectively.

Trust in proprietary AI is lowest for creative and strategic work (43%). However, trust in open-source AI for these higher-order tasks remains steady across experience levels. 65% of developers

with under five years of experience trust open-source AI for creative and strategic work, as do 69% of those with 15–20 years of experience. In contrast, trust in proprietary AI for development tasks drops significantly with experience, with only a 53% approval rating among newer developers to just 31% with the more seasoned group.

Security goes hand-in-hand with trust, but opinions are divided when it comes to open-source AI. 44% of developers believe it poses a security risk but nearly half (48%) do not view security as a major issue. Investments in maintenance, discoverability, and security are important to the progress of open-source AI, and investments of this kind will be boosted by the strong belief that AI should be open source as a matter of ethics: 86% agreed that open-source AI serves the public’s best interest.

Building trust, accessibility and community

Our research highlights a shared belief in open-source among experienced developers, as well as a growing enthusiasm among the next generation. Seasoned technologists value its transparency and collaborative nature, while younger developers trust open-source tools as accessible platforms for learning and experimentation.

Wherever developers may be in their career journey, trust and accessibility will play a critical role in shaping how they interact with AI technology. Today, open-source AI isn't solely a community-driven effort; it's also a burgeoning area of commercial interest. With more companies offering open-source AI options to the public, there's a growing need for long-term sustainability, particularly in project maintenance, infrastructure, and contribution management.

As open-source models continue to gain popularity, we may see the AI ecosystem shift towards more open development models. To fully realise the potential of open-source AI, however, challenges like discoverability and experience gaps must be addressed. Strengthening open-source communities, improving access to projects and datasets, and fostering trust across all generations will be crucial in shaping the future of AI.

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