Mozilla Monitor review (2026): is it any good?
Free data breach scanner with alerts and guided fix steps
Mozilla Monitor report card
Good · out of 4.0 · graded Nov 12, 2026
Best for checking whether your email is in a breach
Mozilla Monitor searches known data breaches for an email address, sends an alert when a new one includes it, and walks you through the fixes. It is free for up to 5 addresses, but it does not remove anything from data brokers, and the fixes are yours to carry out.
Who Mozilla Monitor is for
- Fits if you only want to know whether your email turned up in a breach
- Works for a family checking up to 5 addresses
Who Mozilla Monitor is not for
- Skip it if you want your details removed from people-search sites, as it doesn't do that
- Not for you if you want it to fix breaches, because the steps are yours to carry out
- Watch out: it monitors email addresses only, not phone numbers
- Watch out: Mozilla's help pages blocked our fetch, so we couldn't confirm whether a paid plan still exists
Why Mozilla Monitor gets a 2.8
Five grades, each with its reason. The GPA is their average: an A is 4 points, an F is none.
- AValue for moneyFree outright for up to 5 email addresses, with no paid plan shown on the pages we read.
- AFree plan and trialA free breach scan and alerts for up to 5 email addresses, with no cap an ordinary person would reach.
- DFeaturesOne narrow job: breach scan, alerts and guided steps. It doesn't remove personal information from people-search sites or data brokers.
- BEase of useNo store rating on record, but you enter an email address and get a result, with nothing to set up.
- CPlatforms and integrationsWeb only, by email address, and the listing names no integrations or apps.
What these grades rest on. Graded from this listing, whose facts were read from Mozilla Monitor's own pages on 12 November 2026. Not based on using the product, and shorter than our full reviews. How we review and grade.
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<a href="https://toolgpa.com/tools/mozilla-monitor#review"><img src="https://toolgpa.com/badge/mozilla-monitor.svg" alt="Mozilla Monitor: 2.8 GPA on ToolGPA" width="196" height="56"></a>Where Mozilla Monitor stands among data removal services
Mozilla Monitor's GPA of 2.8 is higher than 10 of the 11 other data removal services we grade, and level with 1.
It stands best on free plan and trial (A, above 11 of 11) and worst on features (D, above 0).
Mozilla Monitor has no paid plan.
On features, ease of use and platforms it scores 2.0 out of 4, and no tool on the category's chart scores higher without costing more.
Each grade against the category
Every bar is all 12 data removal services we grade, cut by the letter each got. Mozilla Monitor’s own letter is outlined.
- AValue for moneyAbove 10 of 11, level with 1
- AFree plan and trialAbove 11 of 11
- DFeaturesAbove 0 of 11
- BEase of useAbove 5 of 11, level with 6
- CPlatforms and integrationsAbove 0 of 11, level with 6
Price against what you get
Each dot is one of 10 data removal services. Further left costs less, and higher up scores better on features, ease of use and platforms. Point at a dot to see which tool it is.
Features, ease of use and platforms, averaged
What paid plans start at, a month (each step along is roughly double) →
- The best score at each price
- Has a free plan
- No free plan
Keep Mozilla Monitor, or make your own?
Keep it
Mozilla Monitor is free, so making your own would save you nothing.
And it is not the kind of software a weekend replaces. It is one of the better ones too: its GPA of 2.8 is higher than 10 of the 11 other data removal services we grade.
What you could make
- Reports: an app builder makes this well.
What you could not
- Opt-out requests to hundreds of data brokers, sent again whenever they list you again.
What this rests on. Mozilla Monitor’s listing: what it does, where it runs, what it plugs into and what it costs. It is a judgement about the kind of software this is. We have not built a replacement for it, and making your own means looking after it too. How we decide, and every tool’s verdict.
What is Mozilla Monitor?
Mozilla Monitor searches known data breaches for an email address, walks the user through resolving each exposure, and sends an alert when a new breach includes that address. The pages we read describe breach monitoring only and list no paid plan and no removal from data broker sites.
Worth knowing
- It checks breaches and does not remove personal information from people-search sites or data brokers; the pages we read mention no such service.
- It cannot resolve breaches for you: the steps, such as changing passwords, are yours to carry out.
- Monitoring is by email address; the pages we read do not list phone numbers or other identifiers.
- Mozilla's help pages blocked our fetch, so we could not confirm whether any paid Monitor plan still exists.
Key features
- Breach scan
- Searches known data breaches using just an email address.
- Guided resolution steps
- Because fixing a breach usually means manual steps such as changing passwords or placing a fraud alert, it gives instructions instead of fixing exposures itself.
- Alerts for new breaches
- Checks each newly detected breach against your address and emails you if you are in it.
- Five email addresses
- All subscribers can monitor 5 email addresses at no cost.
- Breach database
- A public list of reported breaches since 2007, showing the date each was added and which data types it exposed.
Mozilla Monitor pricing
As of Nov 12, 2026, Mozilla Monitor is free to use.
- Starts at
- Free
- Free plan
- Free breach scan and alerts for up to 5 email addresses, with guided steps to resolve each exposure.
- Free trial
- None listed
| Plan | Price | What you get |
|---|---|---|
| Free | $0 | Breach scan, new-breach alerts and guided fix steps for up to 5 email addresses. |
Read from monitor.mozilla.org on Nov 12, 2026. Prices change, so confirm with Mozilla Monitor before you buy.
Mozilla Monitor alternatives
- Mozilla Monitor vs Incogni
From $7.99/mo
- Mozilla Monitor vs DeleteMe
From $129/yr
- Mozilla Monitor vs Optery
Free plan · from $3.25/mo
- Mozilla Monitor vs Kanary
From $250/yr
- Mozilla Monitor vs Aura
Free trial · from $12/mo
Common questions
Does Mozilla Monitor have an Android app?
No Android app was listed when its pages were read on Nov 12, 2026. Mozilla Monitor is listed for Web.
Does Mozilla Monitor have an iPhone app?
No iPhone app was listed when its pages were read on Nov 12, 2026. Mozilla Monitor is listed for Web.
Is Mozilla Monitor open source?
Mozilla Monitor is not described as open source on its own site, as read on Nov 12, 2026.
Sources for this page
The prices, plans, platforms and features above were read from these pages on Nov 12, 2026.