Pricing
Eight extensions are published. Six are free and have no paid tier at all. Two have one, MurmSpy and MurmAds, and a bundle covers both together. Every free tier is permanent: nothing here is a trial that runs out, and no free tier gets worse when a paid one gets better.
There are no time-limited trials. Every free tier below is permanent, and each is meant to be enough to judge the tool by. Two extensions have a paid tier, and the one bundle on sale covers exactly those two. It is described further down this page.
The whole price list
| Extension | What it does | Free | Pro |
|---|---|---|---|
| MurmStack | Who a page contacts, and when | €0 | None. No paid tier exists. |
| MurmSpy | Shopify and TikTok Shop store research | €0 | €8.99/month or €69/year |
| MurmAds | Meta Ad Library research | €0 | €9.99/month or €79/year |
| MurmProof | What a page claims, against what it discloses | €0 | None. No paid tier exists. |
| MurmSchema | What structured data a page declares | €0 | None. No paid tier exists. |
| MurmPulse | How a product page’s own figures moved between your visits | €0 | None. No paid tier exists. |
| MurmMargin | Landed cost and break-even ad spend on a supplier listing | €0 | None. No paid tier exists. |
| MurmCrawl | Which AI crawlers a site allows or refuses | €0 | None. No paid tier exists. |
Two products with a paid tier, and six without. The two paid tiers can be bought on their own or together as one bundle, priced further down this page.
MurmStack — free, permanently
Reports which companies a web page contacted, when each was first reached, and
what the site is built with. €0, with no paid tier and no upsell.
Two permissions, activeTab and scripting, and no host
permissions at all — it cannot run on any site until you click its icon.
MurmSpy — free, or Pro at €8.99/month
Annual is €69, which saves €38.88 against twelve monthly payments — 36%, or roughly four months free.
| Free — €0 | Pro — €8.99/mo or €69/yr | |
|---|---|---|
| Products per store | 25, newest first | Unlimited |
| Best sellers | Top 10, ranked | Unlimited, with the rank-derived demand index |
| Saved stores | 3 | 50 |
| CSV exports | 1 per day | Unlimited, no watermark |
| Report card (PNG) | 1 per day | Unlimited |
| Launch cadence | Last 6 months | Full 24 months |
| Pricing analysis | Top line: median price, share discounted, average depth | Full distribution and the biggest-markdown table |
| App and theme detection | All 137 fingerprints | All 137 fingerprints — identical |
| TikTok Shop module | Not included | Included |
| Store comparison | Not included | Side by side across saved stores |
App and theme detection is the one row that is deliberately identical at both tiers. It is the thing most people install it for, and holding back a fingerprint someone has already loaded the page for would be withholding a fact rather than selling a feature.
MurmAds — free, or Pro at €9.99/month
Annual is €79, which saves €40.88 against twelve monthly payments — 34%, or roughly four months free.
| Free — €0 | Pro — €9.99/mo or €79/yr | |
|---|---|---|
| Ads on the page | All of them, with their scaling signals | All of them, with their scaling signals |
| Saved ads | 15, on 1 board, list view | Unlimited, unlimited boards |
| Board layout | List | The spatial canvas |
| EU transparency spend and audience | Not included | Revealed inline and rolled up |
| Advertiser roll-up depth | Hatched — the value exists and is withheld | All roll-ups |
| Poster exports | 1 per day, watermarked | Unlimited, no watermark |
| Bulk creative download | Not included | Included |
| Filters | Status and media type | Platform, CTA and date range as well |
Where the free tier withholds something, it is drawn as a 45° hatch rather than a blur. A blur promises a value is under the glass — which would be a lie on every figure the platform never published in the first place.
MurmProof — free, permanently
Counts the commercial links on a page, reports how far a reader scrolls before meeting the first one, and measures where the disclosure sits relative to it. €0, with no paid tier. It is published in the Chrome Web Store, and its page carries the install button.
MurmMargin: free, permanently
The whole answer is free: landed cost, margin, markup, break-even ad spend, the duty band with both edges, every assumption, and the alert when a supplier moves the price between your visits. It has no paid tier. What it does · Why ordering more can cost more
MurmSchema, MurmPulse, MurmCrawl — free, permanently
Three readers with no paid tier and no plans for one. MurmSchema reports the structured data a page declares; MurmPulse records what a product page publishes each time you visit and reports the change; MurmCrawl reads which AI crawlers a site allows or refuses. None has a server, an account or a way to spend money on it.
The bundle: both paid tools together
MurmSpy Pro and MurmAds Pro bought separately come to €18.98/month or €148/year. The bundle covers both at €12.99/month or €99/year. Monthly, that is €5.99 a month less than the two apart, 32%. Annually it is €49 a year less than the two apart, 33%, and €56.88 less than twelve bundle months, 36%.
There is no lifetime option. The bundle is a subscription, monthly or annual, and nothing else.
What no amount of money unlocks
The refusals in these tools are not the top of a pricing ladder. Each is a figure that no source publishes, so there is nothing behind the paywall to move:
- Shopify revenue and units sold. Shopify publishes rank order, not sales. MurmSpy prints a refusal at that tile size on every storefront, at both tiers.
- Meta impressions, clicks, conversions and CTR. Meta discloses none of them for anyone's ads. Pro reveals the disclosures Meta did publish, and an interval stays an interval — paying does not convert a range into an exact figure.
- What a page earns from its affiliate links. Commission rates live in a private dashboard. MurmProof prints an em-dash and the reason.
The one modelled money figure anywhere in the family is on TikTok Shop — the platform's own sold counter times the current price — and it is printed with its formula underneath, labelled a ballpark, and marked as a floor when TikTok truncates the counter.
The billing details
- Currency: EUR, for every tier.
- Payment: Stripe, via ExtensionPay. Monthly or annual, cancel any time, no contract.
- Refunds: handled through Stripe — write to us with the address you paid with.
- Accounts: none for any free tier. No email address, no card.
- Platform: Google Chrome and Chromium browsers — Edge, Brave, Arc, Opera. Manifest V3.
- Data collected by any tier of any tool: none. There is no MurmTools server; every analysis runs in your browser.
- Affiliate links, browsing analytics, session recording: none, in any tool, at any tier.
- Not requested by any of them: “read your data on all
websites”,
cookies,identity,management,webRequest,history.
Questions
Is there a free trial?
No, and that is deliberate. Nothing here expires. The free tiers are permanent and are meant to be enough to judge the tool by — MurmSpy free reads 25 products, the top ten best sellers and the full app and theme detection on any store; MurmAds free reads every ad on the page in front of you.
Is there a bundle?
Yes, one. Only two of the eight published extensions have a paid tier, MurmSpy and MurmAds, and the bundle covers both at €12.99 a month or €99 a year. There is no lifetime option. The other six are free, so there is nothing to bundle them into.
Does paying unlock a revenue estimate?
No. Those figures are not withheld — they were never computed, because the platform publishes nothing to compute them from. Pro buys depth on figures that exist.
Do I need an account?
Not for any free tier: no account, no email, no card. A Pro licence is checked against ExtensionPay and cached locally.
What happens to my saved stores or boards if I cancel?
They stay on your machine — they live in local browser storage and never went anywhere else. The tier limits reapply to what the panel will show you, but nothing is deleted by us, because there is no “us” holding it.