Free AI code assistants are good enough now that you do not need to start with a paid subscription. The catch is that "free" can mean different things: free completions with limits, free open-source software that needs your own API key, a free tier attached to a paid product, or a cloud service that may change quotas later.
I would treat free tools as a way to find your workflow. Try one for autocomplete, one for chat, and one for agent-style edits. Keep the one that saves time without making your code harder to review.
How We Evaluated
The free tier has to be useful, not just a landing page. I looked for tools that can help with real work: completing code, explaining errors, drafting tests, navigating a repo, or editing files through a controlled loop. I also considered setup time, editor support, privacy options, and whether the free path has obvious gotchas.
The best free tool for a student is not always the best free tool for a professional team. A solo developer may care about unlimited suggestions. A company may care more about admin controls and data policy before anyone installs an extension.
