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Maps · head to head

Correlator3D vs Felt

Correlator3D logo

Correlator3D

Maps

SimActive photogrammetry with a published price list and a perpetual licence still on sale

From
$295/month
Rated
-
Full reviewWebsite
Felt logo

Felt

Maps

Collaborative browser mapping with a free non-commercial tier and annual-only paid contracts

From
Free
Rated
-
Full reviewWebsite

The short version

  • Only Felt has a free tier, so it costs nothing to try first.
  • Each has a real cost: Correlator3D the standard licence caps at 61 megapixel sensors, so an operator moving to a medium or large format camera has to buy a different and separately quoted licence rather than paying an upgrade fee.; Felt felt publishes no prices for Professional or Enterprise, so buyers cannot compare against ArcGIS Online or QGIS with hosting without entering a sales process
  • They diverge on capability: Correlator3D covers Aerial triangulation, Felt covers Real-time collaboration.
  • Prices and features above were last checked on 1 September 2026.

Where they differ

Only the attributes on which Correlator3D and Felt actually diverge.

Attributes where Correlator3D and Felt differ
AttributeCorrelator3DFelt
Starting price$295/monthFree
Pricing modelOne-time purchasequote
Free tierNoYes
PlatformsWindowsWeb, iOS, Android

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

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 Correlator3D

  • Aerial triangulation
  • DSM and DTM generation
  • Orthomosaic production
  • Point cloud and 3D mesh output
  • Feature extraction
  • GPU acceleration
  • Satellite imagery support
  • Batch and unattended processing

Only in Felt

  • Real-time collaboration
  • Drag and drop data
  • Unlimited viewers
  • Field app with offline support
  • Dashboards
  • Live cloud sources
  • API and SDK

What people use each for

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

Correlator3D

  • An aerial survey company processing large photographic blocks where per-project cloud credits would be more expensive than owning a licencenot Felt
  • A national or regional mapping agency that needs software it can run offline on classified or restricted imagerynot Felt
  • A drone service provider producing bare-earth terrain models for volumetrics and corridor mapping at high throughputnot Felt
  • An organisation that wants a perpetual licence because a multi-year subscription cannot be justified against its capital budgeting rulesnot Felt

Felt

  • An environmental consultancy that needs a client to view and comment on survey results without installing GIS softwarenot Correlator3D
  • A utility field crew collecting asset condition offline and syncing to the same map the office is looking atnot Correlator3D
  • A planning department sharing a proposal map with the public where the viewer count is unpredictable and viewer seats would be uncostednot Correlator3D
  • A team of analysts who each hold data in different formats and want one map assembled in an afternoon rather than a weeknot Correlator3D

Where each one falls short

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

Correlator3D

  • The standard licence caps at 61 megapixel sensors, so an operator moving to a medium or large format camera has to buy a different and separately quoted licence rather than paying an upgrade fee.
  • It is Windows desktop only with no cloud processing option, so throughput is bounded by the workstation and GPU you buy, and there is no way to burst capacity for one large job.
  • There is no collaboration layer, client portal or field application, so deliverable sharing, review and version control all have to be handled by other software.
  • The interface and workflow are built for photogrammetry specialists; an occasional drone operator will find the learning curve steeper than a consumer-oriented mapping package.
  • The perpetual licence includes only one year of support and updates, and staying current afterwards means paying maintenance, so the headline $5,900 is not the whole long-term cost.

Felt

  • Felt publishes no prices for Professional or Enterprise, so buyers cannot compare against ArcGIS Online or QGIS with hosting without entering a sales process
  • Paid tiers are annual contract only with no monthly option, which excludes consultancies that need a tool for a single short engagement and forces them to the free non-commercial tier they are not licensed to use for client work
  • The API, JavaScript SDK and live warehouse connections are enterprise-only, so a mid-sized team that wants programmatic access has to buy the top tier rather than pay for one capability
  • Analytical depth is limited: there is no meaningful geoprocessing, topology checking or model building, so Felt sits beside a real GIS rather than replacing one
  • The Professional tier caps data processing at 25 GB a month and map views at 100,000 a month, which are easy to exceed with raster imagery or a public-facing map, and the overage terms are not published either

Pricing, plan by plan

Correlator3D

$295/month
  • Monthly subscription$295/month
    • Unlimited images
    • Sensors up to 61 megapixels
    • All modules and tools
  • Yearly subscription$2950/year
    • Unlimited images
    • Sensors up to 61 megapixels
    • All modules and tools
  • Permanent licence$5900/one-time
    • Perpetual licence
    • Unlimited images up to 61 megapixels
    • All modules and tools
  • Permanent floating licence$6400/one-time
    • Perpetual floating licence shared across machines
    • Unlimited images up to 61 megapixels
    • One year of support and updates included

Felt

Free
  • PersonalFree
    • Free forever for non-commercial mapping
    • Map creation, upload and sharing
    • Not licensed for commercial use
  • Professional$undefined/year
    • 10 full-access seats with unlimited viewers
    • 25 GB of data processing per month
    • 100,000 map views per month
  • Enterprise$undefined/year
    • Live cloud sources including Postgres, Snowflake, BigQuery, Databricks and S3
    • REST API and JavaScript SDK
    • AI features

Which should you pick?

Choose Correlator3D if

  • You need aerial triangulation.
  • You work on Windows.
  • You also want dsm and dtm generation.
Correlator3D review

Choose Felt if

  • You need real-time collaboration.
  • You want to start without paying.
  • You work on Web, iOS, Android.
  • You also want drag and drop data.
Felt review

Questions people ask

Is Correlator3D or Felt better?
Neither clearly leads. Correlator3D starts at $295/month and Felt at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Correlator3D or Felt?
Felt has a free tier; the other does not. Paid plans start at $295/month for Correlator3D and Free for Felt.
Does Correlator3D or Felt run on more platforms?
Correlator3D runs on Windows. Felt runs on Web, iOS, Android.
Can I use Felt for free?
Yes. Felt has a free tier, so you can try it without paying. Correlator3D starts at $295/month.
What is Correlator3D best used for?
Correlator3D is most often used for an aerial survey company processing large photographic blocks where per-project cloud credits would be more expensive than owning a licence, a national or regional mapping agency that needs software it can run offline on classified or restricted imagery, a drone service provider producing bare-earth terrain models for volumetrics and corridor mapping at high throughput, an organisation that wants a perpetual licence because a multi-year subscription cannot be justified against its capital budgeting rules. Of those, an aerial survey company processing large photographic blocks where per-project cloud credits would be more expensive than owning a licence and a national or regional mapping agency that needs software it can run offline on classified or restricted imagery are not what Felt is typically brought in for.
What can Correlator3D do that Felt cannot?
Correlator3D covers Aerial triangulation, DSM and DTM generation, Orthomosaic production, Point cloud and 3D mesh output. Felt covers Real-time collaboration, Drag and drop data, Unlimited viewers, Field app with offline support.

Answered from the vendors’ own pages

Correlator3D: Can I still buy a perpetual licence?

Yes. $5,900 for a permanent licence and $6,400 for a permanent floating licence, each including a year of support and updates.

Felt: What does Felt cost?

Felt does not publish prices for Professional or Enterprise. Personal is free but licensed for non-commercial use only.

Correlator3D: What limits the standard licence?

Sensor resolution, up to 61 megapixels. Medium format, large format and satellite imagery need separately priced licences.

Felt: Can I pay monthly?

No. Paid plans are annual contracts. There is a 7 day trial of Professional.

Correlator3D: Is there a cloud version?

No. Processing runs on your own Windows workstation. SimActive offers a data processing service as an alternative to buying the software.

Felt: Do viewers cost anything?

No. Viewer access is unlimited on the paid plans, which is the main reason organisations with large map audiences choose it.

Correlator3D: Does it handle satellite imagery?

Yes, under a separate satellite licence class quoted on request.

Felt: Is there a nonprofit discount?

Yes, 30 per cent for verified United States nonprofits, and free access for verified students and classrooms.

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