Phantom

Every developer has opened an unfamiliar codebase and felt completely lost. Legacy code with no documentation. A library with no comments. Someone else's clever abstraction that made perfect sense to them and nobody else. Today you paste it into ChatGPT or Claude and hope the explanation is good enough — but your code just left your machine, went to a server, and became someone else's training data. For open source projects this is uncomfortable. For proprietary codebases this is a serious security violation.

PHANTOM solves this at the root. It runs a code-specialized language model entirely inside the browser — no network requests, no backend, no API key. Paste any function, any file, any snippet and PHANTOM explains exactly what it does, how it works, and why it was likely written that way. In plain English. Instantly. Privately.

Then there's the resilience problem. APIs get deprecated. Startups shut down overnight. Prices get raised 10x without warning. If your understanding of your own codebase depends on a third-party server staying alive and affordable, you don't own your workflow — you're renting it. PHANTOM lives entirely on your machine. What happens when your AI provider goes down? Nothing. You keep working.

And then there's the moment every developer knows. You're deep in an unfamiliar codebase, finally making progress, and the screen says — "You've reached your usage limit. Try again in 3 hours." Flow state: destroyed. Momentum: gone. PHANTOM has no rate limits. No quotas. No "come back later." It runs as long as your laptop runs.

As a SDK, any developer can drop PHANTOM into their own tool with a single npm install — documentation platforms, code editors, education tools, internal developer portals — instantly gaining private, offline code explanation with zero per-call cost and zero data exposure. As of 2026, WebGPU support has landed across Chrome, Edge, Firefox, and Safari on desktop with full iOS 26 coverage — meaning PHANTOM works on laptops and increasingly on mobile too.

The market is every developer who has ever pasted proprietary code into a public AI tool and felt a quiet unease about it. PHANTOM removes that unease permanently — because the code never goes anywhere.