LLMs Ledger vs Prominara (2026): which should you pick?

Pick LLMs Ledger if

• Fits if you want to know your llms.txt still works after each site update, from $9 a month
• Works for developers who want a CI build to fail when an llms.txt has errors

Look elsewhere if

• Not for you if you want to know whether AI assistants mention or cite you, as it doesn't track that
• Watch out: the free listing needs a badge linking to LLMs Ledger, and it's hidden if the badge is gone for 14 days
• Tight if you stay free, as the file is checked only every 3 months
• Skip it if you look after several sites, since every plan but Agency covers one, and Agency comes in 10-site packs at $79 a month
• Watch out: the vendor says it can't promise a listing makes AI assistants read or cite your site

Pick Prominara if

• Fits if you want to know whether a change moved AI answers, rather than guessing from the trend
• Works for agencies reporting to a few clients under their own brand, from Pro

Look elsewhere if

• Skip it if you need daily checks, as prompts are re-checked weekly at most
• Tight if you start on Starter: 15 prompts on 2 of the 5 AI surfaces, checked every two weeks
• Pricey if you want all five surfaces or white-label reports, which start on Pro at $149 a month
• Too light for agencies with more than 3 clients, as Agency includes 3 workspaces and more means asking sales
• Watch out: plans bill monthly, and yearly billing is arranged by email with no saving stated

LLMs Ledger

• It checks and lists llms.txt files; it does not track whether AI assistants mention or cite a business.
• The free listing depends on a badge on your site and checks the file only every 3 months.
• Every plan except Agency covers one site; Agency is sold in 10-site packs, and over 100 sites means contacting the company.
• The vendor says it cannot promise that a listing makes AI assistants read or cite a site.

Prominara

• Starter covers only 2 of the 5 AI surfaces, checks every two weeks rather than weekly and has no white-label reports.
• Prompts are re-checked weekly at most, not daily; the vendor says this is deliberate to judge changes against noise.
• Plans are billed monthly; annual billing is arranged by email, and the page states no saving for it.
• Agency includes 3 client workspaces; more clients means asking sales to raise the limits.

LLMs Ledger

llms.txt validator

Scores a file out of 100 against the llms.txt proposal, with each error or warning explained and the change to make; free on the site.

Directory listing

Each submitted site gets a public listing page with its summary, score, validation status and change history, linking back to the site.

Monitoring and version history

Paid plans re-fetch the file monthly or nightly, keep every version with a line-by-line comparison and email when it breaks or changes.

AI readiness check

A free 100-point check of HTTPS, whether Google, Bing, ChatGPT, Perplexity and Claude crawlers are allowed, structured data, sitemap and speed.

Generator

Writes an llms.txt for sites that do not have one yet, to publish and then submit to the directory.

API and webhooks

A free, keyless validator API for scripts and CI builds, plus a keyed API for your own sites and webhooks when a site changes, breaks or goes live.

Prominara

Prompt tracking on five AI surfaces

Puts tracked buyer questions to ChatGPT, Perplexity, Gemini, Google AI Overviews and AI Mode, counting mentions and citations apart, with position and sentiment.

Source gaps and playbooks

Ranks the pages each answer cites and, where competitors are cited and you are not, writes a playbook with steps, effort and risks.

Share of voice

Shows how often AI names you against each competitor, engine by engine, counting only prompts that do not name you, with a range on each figure.

Site audit and generators

Scores more than 40 page and site checks into a 0 to 100 GEO score and generates llms.txt, robots.txt, sitemap and JSON-LD schema from the crawl.

Impact measurement

Log a change and it compares the prompts you worked on with ones you did not touch over 7, 14 and 28 days, giving a probability rather than a yes or no.

Accuracy monitor and agent access

Flags wrong facts AI states about your brand with a correction playbook, and an MCP connection lets Claude, ChatGPT, Cursor or Codex use the workspace.

LLMs Ledger

• Free$0

  Public listing with score and fixes, file checked every 3 months. Needs a badge on your site; the listing is hidden if it is gone 14 days.

• Monthly$9

  per month for 1 site, file checked monthly

  No badge needed, weekly AI readiness re-checks, every version kept and an email if the file stops working. $90 billed yearly.

• Nightly$19

  per month for 1 site, file checked nightly

  Adds a nightly check of every link in the file, an email showing what changed, a Checked nightly label and a place first in results. $190 yearly.

• Agency$79

  per 10-site pack / month, checked nightly

  The Nightly plan for 10 client sites per pack, weekly readiness checks for all and one dashboard; add packs any time. $790 yearly.

Prominara

• Starter$29

  per month for 15 prompts on 2 AI platforms, billed monthly

  1 website, citation checks every two weeks, 10 pages audited in depth per run, 3 months of history and 3 llms.txt or schema generations a month.

• Pro$149

  per month for 50 prompts on 5 AI platforms, billed monthly

  3 websites, weekly checks on all five AI surfaces, 50 pages audited per run, 12 months of history, unlimited generators and 5 white-label reports a month.

• Agency$299

  per month for 120 prompts on 5 AI platforms, billed monthly

  3 client workspaces with 6 websites, 200 pages audited per run, 24 months of history, unlimited white-label reports and client portals.

LLMs Ledger

• Annual discount

  Two months free with yearly billing

  The pricing page offers yearly billing at two months free: Monthly is $90 a year, Nightly $190 and each Agency pack $790.

Prominara

No public discounts listed.