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Research · head to head

Castor EDC vs Mouseflow

Castor EDC logo

Castor EDC

Research

Electronic data capture and eConsent for clinical trials, built for investigator-initiated studies as well as sponsors

From
On request
Rated
-
Full reviewWebsite
Mouseflow logo

Mouseflow

Research

Session replay and heatmaps

From
Free
Rated
-
Full reviewWebsite

The short version

  • Only Mouseflow has a free tier, so it costs nothing to try first.
  • Each has a real cost: Castor EDC nothing is published: pricing is quoted only after a scoping call and protocol review, so budgeting a grant application means asking for a quote months before the study is funded and hoping the scope holds.; Mouseflow the free plan is 500 sessions a month, one website and one month of data retention
  • They diverge on capability: Castor EDC covers Browser-based study build, Mouseflow covers Session Replay.
  • Prices and features above were last checked on 31 August 2026.

Where they differ

Only the attributes on which Castor EDC and Mouseflow actually diverge.

Attributes where Castor EDC and Mouseflow differ
AttributeCastor EDCMouseflow
Starting priceOn requestFree
Pricing modelquotesubscription
Free tierNoYes
PlatformsWeb, iOS, AndroidWeb
FoundedUnknown2009

Identical on both: user rating (Not yet rated), category (Research).

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 Castor EDC

  • Browser-based study build
  • 21 CFR Part 11 workflows
  • eConsent
  • ePRO and surveys
  • Randomisation
  • Per-study licensing
  • Grant-funded pricing paths
  • Data export

Only in Mouseflow

  • Session Replay
  • 6 Types of Heatmaps
  • Funnels
  • Form Analytics
  • User Feedback
  • Google Analytics
  • Segment
  • HubSpot

What people use each for

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

Castor EDC

  • An academic hospital running an investigator-initiated trial that cannot fund a sponsor-grade EDC contract or a data management CROnot Mouseflow
  • A medical device company collecting post-market clinical follow-up data with Part 11 audit trailsnot Mouseflow
  • A multi-site registry that needs remote eConsent because participants are recruited nationally rather than at a clinicnot Mouseflow
  • A biotech running a small phase two study that wants the database built by its own clinical team in weeks rather than commissionednot Mouseflow

Mouseflow

  • Session replay to watch how visitors use a pagenot Castor EDC
  • Click, scroll and geographic heatmapsnot Castor EDC
  • Conversion funnel and form analyticsnot Castor EDC
  • Friction detection on problem pagesnot Castor EDC
  • On-site feedback surveysnot Castor EDC

Where each one falls short

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

Castor EDC

  • Nothing is published: pricing is quoted only after a scoping call and protocol review, so budgeting a grant application means asking for a quote months before the study is funded and hoping the scope holds.
  • Price scales on protocol complexity rather than a simple unit, so two studies with the same participant count can be quoted very differently and there is no public benchmark to argue against.
  • Modules such as eConsent, ePRO and randomisation are quoted on top of the base platform, so the headline EDC figure is rarely the number that appears on the final proposal.
  • It is deliberately lighter than the full sponsor suites, so a study that grows into a global registrational programme needing integrated CTMS, safety, IRT and full trial supply management will need additional systems and the interfaces between them.
  • Regulatory responsibility does not transfer with the software: the platform supports Part 11 compliant workflows, but system validation for your intended use, SOPs and audit readiness remain your obligation and your cost, which sponsors new to EDC consistently underestimate.

Mouseflow

  • The free plan is 500 sessions a month, one website and one month of data retention
  • Data retention is tiered, from 1 month on free to 12 months on Premium at $319 a month
  • Essential at $25 a month covers a single website project
  • SSO, custom privacy settings and priority support are on the higher tiers only
  • The 14 day money-back guarantee applies to annual subscriptions and excludes Enterprise

Pricing, plan by plan

Castor EDC

On request
  • Castor EDC$undefined/year
    • Priced per study on protocol complexity, duration, sites and modules
    • 21 CFR Part 11 and ICH GCP workflows
    • eConsent, ePRO and randomisation modules quoted separately

Mouseflow

Free
  • FreeFree
    • 500 monthly sessions
    • 1 website project
    • 1 conversion funnel
  • Essential$25/month
    • 5,000 monthly sessions
    • 1 website project
    • 1 conversion funnel
  • Advanced$109/month
    • 25,000 monthly sessions
    • 2 website projects
    • 5 conversion funnels
  • Premium$319/month
    • 100,000 monthly sessions
    • 5 website projects
    • 10 conversion funnels

Which should you pick?

Choose Castor EDC if

  • You need browser-based study build.
  • You work on Web, iOS, Android.
  • You also want 21 cfr part 11 workflows.
Castor EDC review

Choose Mouseflow if

  • You need session replay.
  • You want to start without paying.
  • You also want 6 types of heatmaps.
Mouseflow review

Questions people ask

Is Castor EDC or Mouseflow better?
Neither clearly leads. Castor EDC starts at On request and Mouseflow at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Castor EDC or Mouseflow?
Mouseflow has a free tier; the other does not. Paid plans start at On request for Castor EDC and Free for Mouseflow.
Does Castor EDC or Mouseflow run on more platforms?
Castor EDC runs on Web, iOS, Android. Mouseflow runs on Web.
Can I use Mouseflow for free?
Yes. Mouseflow has a free tier, so you can try it without paying. Castor EDC starts at On request.
What is Castor EDC best used for?
Castor EDC is most often used for an academic hospital running an investigator-initiated trial that cannot fund a sponsor-grade edc contract or a data management cro, a medical device company collecting post-market clinical follow-up data with part 11 audit trails, a multi-site registry that needs remote econsent because participants are recruited nationally rather than at a clinic, a biotech running a small phase two study that wants the database built by its own clinical team in weeks rather than commissioned. Of those, an academic hospital running an investigator-initiated trial that cannot fund a sponsor-grade edc contract or a data management cro and a medical device company collecting post-market clinical follow-up data with part 11 audit trails are not what Mouseflow is typically brought in for.
What can Castor EDC do that Mouseflow cannot?
Castor EDC covers Browser-based study build, 21 CFR Part 11 workflows, eConsent, ePRO and surveys. Mouseflow covers Session Replay, 6 Types of Heatmaps, Funnels, Form Analytics.

Answered from the vendors’ own pages

Castor EDC: Is there a free academic version?

No published free tier. There are academic, non-profit and grant-funded pricing paths, but each is quoted rather than self-service.

Mouseflow: Is there a free version of Mouseflow?

Yes, Mouseflow offers a free plan with up to 500 monthly sessions, 1 website project, and 1-month data retention.

Source
Castor EDC: Is it 21 CFR Part 11 compliant?

It supports Part 11 compliant workflows with audit trails and electronic signatures. Validating the system for your specific use remains your responsibility.

Mouseflow: What is the most popular Mouseflow plan?

The Advanced plan at $109/month is marked as most popular, offering 25,000 monthly sessions and 6 months of data retention.

Source
Castor EDC: Do I need a programmer to build a study?

No. Case report forms are configured in the browser, which is the main reason academic groups adopt it.

Mouseflow: Does Mouseflow offer annual billing discounts?

Yes, Mouseflow offers up to 35% savings when billed annually instead of monthly, and provides a 14-day money-back guarantee.

Source
Castor EDC: How long does a quote take?

Castor states a full pricing proposal within five business days of sharing the protocol.

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