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Cybersecurity · head to head

BigID vs Fathom Analytics

BigID logo

BigID

Cybersecurity

Data discovery and classification across cloud, on-premise and unstructured stores

From
On request
Rated
-
Full reviewWebsite
Fathom Analytics logo

Fathom Analytics

Marketing

Website analytics made simple

From
$14/month
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: BigID pricing scales with data sources and volume, so the cost rises exactly as the estate you need to scan grows, and the modules shown in a demo, including AI security posture and headless deployment, are frequently separate licences that appear only in the final quote.; Fathom Analytics there is no free tier, only a 7 day trial
  • They diverge on capability: BigID covers Structured and unstructured scanning, Fathom Analytics covers Page view tracking.
  • Prices and features above were last checked on 31 August 2026.

Where they differ

Only the attributes on which BigID and Fathom Analytics actually diverge.

Attributes where BigID and Fathom Analytics differ
AttributeBigIDFathom Analytics
Starting priceOn request$14/month
Pricing modelquotesubscription
PlatformsWeb, API, Self-hostedWeb
CategoryCybersecurityMarketing
FoundedUnknown2014

Identical on both: free tier (No), user rating (Not yet rated).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in BigID

  • Structured and unstructured scanning
  • Identity correlation
  • Data security posture management
  • Access intelligence
  • Privacy request support
  • Retention and minimisation
  • AI data controls
  • Policy and remediation workflow

Only in Fathom Analytics

  • Page view tracking
  • Goal tracking
  • Real-time analytics
  • Referrer tracking
  • Privacy-focused
  • GDPR compliant
  • Cloud deployment
  • Web support

What people use each for

The jobs each tool is most often brought in to do.

BigID

  • A bank that has to prove which of thirty year old file shares contain customer identifiers before a data centre migrationnot Fathom Analytics
  • A privacy team that cannot fulfil deletion requests because nobody knows which unstructured stores hold a given customer’s recordsnot Fathom Analytics
  • A security team wanting to find sensitive data sitting in publicly readable object storage buckets before an attacker doesnot Fathom Analytics
  • A company building retrieval augmented AI that must exclude regulated personal data from the index it feeds to a modelnot Fathom Analytics

Fathom Analytics

  • Privacy-focused web analytics without cookie bannersnot BigID
  • A lightweight Google Analytics replacementnot BigID
  • Tracking many sites from one accountnot BigID
  • Long-term historical reporting while subscribednot BigID

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

BigID

  • Pricing scales with data sources and volume, so the cost rises exactly as the estate you need to scan grows, and the modules shown in a demo, including AI security posture and headless deployment, are frequently separate licences that appear only in the final quote.
  • Scanning large unstructured estates is slow and computationally expensive, so most organisations sample rather than scan everything, which reintroduces uncertainty into the very question they bought the tool to settle.
  • Classification accuracy on messy unstructured content requires tuning, and out of the box false positives on things like reference numbers create a large triage backlog that a small governance team cannot clear.
  • It discovers and reports but does not remediate, so realising value requires a separate process and often separate tooling to actually delete, restrict or move the data it flags.
  • It is built for large enterprises and both the price and the administrative overhead are disproportionate below a few thousand employees, where a lighter DSPM tool covers the security use case for far less.

Fathom Analytics

  • There is no free tier, only a 7 day trial
  • Priced on pageviews, from $45 a month at the 500,000 pageview level
  • Custom events count against the pageview allowance rather than being tracked separately
  • Site allowances come in packs, with additional 50-site packs at $10 a month
  • Data is retained forever only while the subscription is active

Pricing, plan by plan

BigID

On request
  • BigID Platform$undefined/year
    • Priced by number of data sources and data volume
    • Discovery and classification core
    • Optional DSPM, access intelligence and AI security modules licensed separately

Fathom Analytics

$14/month
  • Starter$14/month
    • Unlimited page views
    • 1 site
    • Real-time analytics

Which should you pick?

Choose BigID if

  • You need structured and unstructured scanning.
  • You work on Web, API, Self-hosted.
  • You also want identity correlation.
BigID review

Choose Fathom Analytics if

  • You need page view tracking.
  • You also want goal tracking.
Fathom Analytics review

Questions people ask

Is BigID or Fathom Analytics better?
Neither clearly leads. BigID starts at On request and Fathom Analytics at $14/month, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, BigID or Fathom Analytics?
BigID starts at On request and Fathom Analytics at $14/month.
Does BigID or Fathom Analytics run on more platforms?
BigID runs on Web, API, Self-hosted. Fathom Analytics runs on Web.
What is BigID best used for?
BigID is most often used for a bank that has to prove which of thirty year old file shares contain customer identifiers before a data centre migration, a privacy team that cannot fulfil deletion requests because nobody knows which unstructured stores hold a given customer’s records, a security team wanting to find sensitive data sitting in publicly readable object storage buckets before an attacker does, a company building retrieval augmented ai that must exclude regulated personal data from the index it feeds to a model. Of those, a bank that has to prove which of thirty year old file shares contain customer identifiers before a data centre migration and a privacy team that cannot fulfil deletion requests because nobody knows which unstructured stores hold a given customer’s records are not what Fathom Analytics is typically brought in for.
What can BigID do that Fathom Analytics cannot?
BigID covers Structured and unstructured scanning, Identity correlation, Data security posture management, Access intelligence. Fathom Analytics covers Page view tracking, Goal tracking, Real-time analytics, Referrer tracking.

Answered from the vendors’ own pages

BigID: What does BigID cost?

It is quoted by data source count and volume. Reported contracts run from roughly 15,000 to 175,000 US dollars a year, and add-on modules such as AI security posture are licensed on top.

Fathom Analytics: How much does Fathom Analytics cost?

Fathom's entry-level plan costs $45/month for up to 500,000 pageviews. Higher volume tiers exist (1M, 2M, 10M, 25M+ pageviews) with custom pricing. Yearly billing provides 2 months free.

Source
BigID: Does it handle unstructured data?

Yes, and that is its main advantage. It classifies data in files and shares and correlates findings back to individuals, not just to data types.

Fathom Analytics: Is there a free trial for Fathom Analytics?

Yes, Fathom offers a 7-day free trial. There is no free tier after the trial ends.

Source
BigID: Will it delete the data it finds?

Not by itself in most deployments. It identifies and routes findings; deletion and remediation happen through your own processes or connected systems.

Fathom Analytics: What happens if my pageviews exceed my plan limit?

Fathom handles usage overage graciously, only upgrading your plan after two consecutive months over your limit. There are no immediate overage charges.

Source
BigID: Is it a privacy tool or a security tool?

Both are sold from the same discovery core. Buyers increasingly come from security wanting data security posture management rather than from legal wanting privacy.

Fathom Analytics: Can I add extra sites to my Fathom plan?

Yes, extra sites cost $10/month per 50-site pack, or $100/year (which includes two months free). All plans include a minimum of 50 included sites.

Source
Fathom Analytics: Can I cancel Fathom without a long contract?

Yes, there are no contracts and cancellation is flexible. Fathom does not lock customers into agreements.

Source
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