ProperPrompt compared with four prompt tools
ProperPrompt costs £2.99 a month with a free tier of 3 rewrites a day and rewrites each prompt for the model you pick; Prompt Builder, Pretty Prompt, PrePrompt and PromptEval each cover a different slice, as the table shows.
Last checked 30 Oct 2026. Rival details were read from each tool's own page that day.
Prompt tools are not interchangeable: some rewrite, some score, some live in the browser and some in your repo. This page lays out what each one says about itself. We make ProperPrompt, so we have kept to what the other tools' own pages state, with the date we read them, and left out opinions about quality.
Price, what it does, where it runs, free tier
| Tool | Paid, as listed | Free tier | Where it runs | What it does |
|---|---|---|---|---|
| ProperPrompt | Pro £2.99 a month or £24.99 a year; Lifetime £39 once | 3 rewrites a day; confirm an email, no card | Web app and a free Chrome extension (ChatGPT, Claude, Gemini, Grok) | Rewrites a rough prompt for the platform you pick: XML-tagged sections for Claude, a strict schema for ChatGPT, numbered steps for Gemini, role plus markdown for Grok. Text prompts only. |
| Prompt Builder | Starter $9, Pro $19, Unlimited $49, each a month (USD, credit-based) | 5 free prompts, no credit card | Web app and a Chrome extension for ChatGPT, Claude and Gemini | Prompt generator and optimizer with a prompt library and version history; you pick a target model (Claude, ChatGPT, Gemini, Grok). |
| Pretty Prompt | Pro from $8.25 a month billed yearly ($99 a year); Team $12.99 a seat a month, 2 seats minimum | 5 improved prompts a week | Chrome extension for ChatGPT, Gemini and Claude, plus a web app | One-click prompt improver ("Grammarly For Prompts") with a prompt library on Pro; also image-to-prompt. |
| PrePrompt | Developer and Pro: "Price revealed at launch"; Team $20 a seat a month | 30 rewrites a month | Chrome extension, "launching soon" (waitlist); VS Code and MCP | A Rewrite button for ChatGPT, Claude, Gemini and Perplexity; also VS Code and MCP on the same credits. |
| PromptEval | Basic $9, Pro $19 a month (USD); Team custom | 3 web evaluations a month, no credit card | Web app, REST API and a GitHub Action | Scores a prompt from 0 to 100 across four dimensions and flags issues; Pro adds a CI regression gate and prompt serving. Evaluates more than it rewrites. |
Rival prices are in US dollars exactly as each page lists them; we have not converted them. Features and limits change, so check the rival's page before you buy.
Where ProperPrompt is weaker
- Text prompts only. No image or video prompt tools.
- Prompt history is a Pro feature; there is no team workspace or shared library yet, and no public API.
- It rewrites; it does not score prompts or run them in CI, which PromptEval does.
Looking for a replacement for PromptPerfect specifically? See PromptPerfect alternatives.
Questions people ask
How does ProperPrompt compare with Prompt Builder?
Prompt Builder is a credit-based prompt generator and optimizer with a prompt library and version history, listed at $9, $19 and $49 a month. ProperPrompt rewrites a rough prompt for one platform at a time with no credits to count, at £2.99 a month, and has no prompt library beyond Pro history.
How does ProperPrompt compare with Pretty Prompt?
Both put a button in the chat box through a Chrome extension. Pretty Prompt lists 5 improved prompts a week free and Pro from $8.25 a month billed yearly ($99 a year). ProperPrompt gives 3 rewrites a day free and Pro at £2.99 a month or £24.99 a year.
How does ProperPrompt compare with PrePrompt?
PrePrompt's own pages say its Chrome extension is launching soon and are taking a waitlist; its Developer and Pro prices read "Price revealed at launch". Its free plan is 30 rewrites a month. ProperPrompt is live now, with its Chrome extension on the Chrome Web Store.
How does ProperPrompt compare with PromptEval?
They do different jobs. PromptEval scores a prompt from 0 to 100 and, on Pro, gates changes in CI. ProperPrompt rewrites a rough prompt into a structured one for the model you pick. You could use both.
Which of these is cheapest?
For paid plans, ProperPrompt Pro at £2.99 a month is the lowest monthly price listed in the table, but the rivals bill in US dollars and meter usage differently (credits, rewrites a week or a month), so the plans are not like for like. Compare the free tiers and the limits as well as the headline price.
Does ProperPrompt have a free plan?
Yes: 3 rewrites a day, one platform at a time, after you confirm an email address. No card and no account.
Who makes ProperPrompt?
Jadthena Limited, trading as ProperPrompt, in the United Kingdom. This page compares our own product with rivals, so we show where each rival's detail came from and the date we read it.