Prompt Enhancer: A PromptAI360 Alternative with BYOK Privacy and One-Time Pricing
If you are looking for a PromptAI360 alternative, here is an honest side-by-side. Both tools do the same thing: highlight a rough draft, press a global hotkey, and your text is rewritten into a structured prompt right where you typed it.
So the question is not “what do they do.” It is “how do you pay, where do your prompts go, and how deep is the Claude structure.” That is where they split.
A note on honesty: the facts below were checked on PromptAI360’s public site at the time of writing. Pricing, privacy, and features change — verify the current details on promptai360.com before you decide.
What PromptAI360 is
PromptAI360 ships as a Chrome extension and a macOS menu-bar app. The desktop app adds a global hotkey (⌘⇧P by default, rebindable) that rewrites highlighted text in place across Claude Code, Cursor, Antigravity, VS Code, Warp, Ghostty, iTerm, Terminal, Zed and other macOS apps. It targets ChatGPT, Claude, Gemini, Copilot and Perplexity.
On their public pages, the desktop download is free but enhancements run through a PromptAI account: a free trial, then a paid plan. Processing happens on PromptAI’s backend servers — their site states “0 API keys” are required from the user, which means you do not bring your own key and your prompts are sent to their servers for rewriting. They state prompts are not stored or used for training; confirm that on their privacy page.
If you want one tool that spans a browser extension and a Mac app across many models, PromptAI360 is a reasonable option. Check their live pricing and privacy terms yourself.
What Prompt Enhancer is
Prompt Enhancer is a focused desktop app with one job: turn your draft into an Anthropic-XML Claude prompt without leaving the app you are in.
You write a rough draft — Claude.ai, ChatGPT, Cursor, VS Code, a terminal, Notion, anywhere. Press ⌃⌥⌘P. In a few seconds your selected text is rewritten in place using Anthropic’s official XML structure: <role>, <context>, <task>, <output_format>. No window switching, no copy-paste, cursor stays put.
The difference that matters most is how it runs. On Pro you can enable BYOK — bring your own Anthropic API key. Your prompt goes directly to api.anthropic.com; the key lives in the OS keychain; there is no proxy and no server log in between. You can try it with 3 free enhancements first (no signup, no key, no account), then start a 7-day free trial. There is no subscription.
How they compare as alternatives
| Prompt Enhancer | PromptAI360 | |
|---|---|---|
| Form | macOS / Windows menu-bar app, global hotkey | Chrome extension + macOS menu-bar app, global hotkey |
| Core job | Rewrite draft into structured Claude XML, in place | Rewrite draft into a structured prompt, in place |
| Pricing | One-time $29 lifetime, no subscription | Free trial, then a paid subscription (tiered plans — check their current pricing page) |
| How it runs | BYOK: your Anthropic key, direct to api.anthropic.com | Their backend servers (“0 API keys”); no BYOK on their public pages |
| Where prompts go | Directly to Anthropic; no proxy, no server logs | Sent to PromptAI’s servers for processing (they state no storage/training — verify) |
| Claude XML depth | Built around Anthropic’s XML format (role/context/task/output_format) | General-purpose structuring across ChatGPT, Claude, Gemini, Copilot, Perplexity |
| Platforms | macOS + Windows; Linux Q3 2026 | macOS app + Chrome/Edge/Brave/Arc extension |
| Signed / notarized | Yes — notarized & stapled (macOS, June 2026); Windows code-signing in progress | Verify on their download page |
| Maturity | Newer, launched 2026; no long track record | Already live and indexed; established earlier |
The honest difference
Money. Prompt Enhancer is paid once — $29 lifetime, no renewal. PromptAI360 is a subscription on the plans listed publicly. Over a year, a one-time purchase and a monthly plan are very different numbers. Confirm PromptAI360’s current pricing on their page, since plans change.
Privacy. This is the real split. Prompt Enhancer’s default is BYOK: your prompt travels straight to Anthropic on your own key, with no middle server holding it. PromptAI360 processes on its own backend with no user API key, so your prompt passes through their servers. They say prompts are not stored or used for training — a claim worth verifying on their privacy page, because “passes through a server” and “sent direct to the vendor” are genuinely different privacy postures.
Claude depth. PromptAI360 is broad: it structures for ChatGPT, Claude, Gemini, Copilot and Perplexity. Prompt Enhancer is narrow on purpose — it is built around Anthropic’s XML format, the exact shape Claude is trained to follow. If Claude is your main model, depth beats breadth. If you bounce across five providers, breadth may suit you better.
Honest caveats
- Prompt Enhancer is newer and has no long track record yet. PromptAI360 has been live and indexed earlier.
- The macOS DMG is Apple-notarized since June 2026 — no Gatekeeper warning. The Windows installer is code-signing-in-progress; SmartScreen shows a one-time “unknown publisher” prompt (click More info → Run anyway).
- Prompt Enhancer applies Anthropic’s XML structure for Claude. It is not a multi-model switcher and it has no browser extension. PromptAI360 covers more models and ships a Chrome extension.
- All PromptAI360 facts here were read from their public site and may change. Verify current pricing, privacy, and platform support on promptai360.com before deciding.
When to choose which
Choose PromptAI360 if you want a browser extension plus a Mac app, you switch across many models, and a monthly plan with no API key is fine for you.
Choose Prompt Enhancer if Claude is your main model, you want BYOK privacy (prompt goes straight to Anthropic), and you would rather pay once than subscribe.
New to the XML format itself? Start with the guide on how to structure Claude prompts, then download Prompt Enhancer and let it write the structure for you.