What is Existence Compiler?

It is an analysis system that takes your project URL and returns a Digital Existence Score plus an actionable report. It evaluates technical presence, semantic clarity, AI readability, trust signals, and distribution readiness.

What is the Digital Existence Score?

It is a score from 0 to 100 calculated by deterministic rules. It measures how detectable, understandable, and shareable your project is for search engines, AI agents, and social platforms.

Does it guarantee traffic, sales, or indexing?

No. Existence Compiler diagnoses technical and semantic gaps. Improving those conditions increases the likelihood of being discovered, but does not guarantee specific outcomes.

Which pages does it analyze?

In the current MVP it analyzes the main page of the URL you provide, plus checks for common pages such as /about, /pricing, /faq, /contact, /docs, /changelog, /security, /privacy, and /terms.

Yes. The Free plan is completely free and requires no account. You can analyze any URL and download the report in Markdown or JSON.

Does it store my data?

Existence Compiler stores minimal analysis metadata server-side to enable before/after comparisons, such as URL, score, timestamp and a compact report summary. Shared reports are stored with a 30-day TTL. It does not store raw HTML, full page text, raw schema dumps or unnecessary crawl payloads. No account is required for the free analysis flow.

Does it work with SPAs or React/Vue/Angular apps?

The analysis may be incomplete for JavaScript-rendered apps. The crawler fetches the initial HTML without executing JavaScript, so metadata injected only at runtime may not be detected.

It is a simple text file that helps AI systems understand what your project is and how to reference it. Existence Compiler generates a ready-to-use llms.txt snippet based on your detected content.

Does it use AI for analysis?

The main analysis is deterministic (rule-based). An optional AI enhancement layer can generate a deeper semantic summary if enabled, but the core report and score do not require it.

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Existence Compiler vs a prompt library

A prompt library is a collection of templates you fill in manually. Existence Compiler crawls your live URL and produces the output automatically. The gap between them is the amount of work you have to do yourself.

How a prompt library works

A prompt library gives you a template such as: "Write meta tags for a [product type] that does [X] for [audience]." You fill in the blanks, paste it into ChatGPT or Claude, read the output, copy it, and implement it manually.

This requires you to know which prompts exist, which ones apply to your situation, and how to evaluate the quality of the output. There is no audit of your live page, no score, and no gap detection — you do not know what is missing until you run each prompt individually.

How Existence Compiler works

Paste your URL. The system crawls the live page, identifies every missing signal across five dimensions, and produces a structured Fix Pack with ready-to-paste code. No prompts to write. No blanks to fill. No manual gap detection.

Side by side

Prompt library

·You identify which prompts apply
·You fill in the template manually
·You evaluate the output quality
·You copy and implement each item
·No gap detection — you may miss signals
·No score, no structured document
·Process repeats for every update

Existence Compiler

·Paste the URL — system detects everything
·Gaps identified automatically across 5 dimensions
·Digital Existence Score calculated deterministically
·Fix Pack with ready-to-paste snippets
·Executive Report included
·Re-analyzable after implementation
·No prompt engineering required

When a prompt library is the right choice

Prompt libraries are useful when you want to generate original content — ad copy, blog posts, social posts, or product descriptions. They are not designed for technical audits or gap detection. They complement each other: Existence Compiler identifies what to fix, a prompt library helps you refine the copy once you know what is needed.

Try Existence Compiler All comparisons

vs ChatGPT alone →vs AI course →Non-technical founder →