Softwr

Maps · head to head

Fused vs What3words

Fused logo

Fused

Maps

Serverless Python for geospatial: write a UDF, get a map tile endpoint and an HTTP API

From
Free
Rated
-
Full reviewWebsite
What3words logo

What3words

Maps

What3words has divided the world into 3m squares and given each one

From
On request
Rated
-
Full reviewWebsite

The short version

  • Only Fused has a free tier, so it costs nothing to try first.
  • Each has a real cost: Fused the price steps are brutal: $20 to $200 to $2,000 a month with no intermediate tier, so a two-person team that outgrows Starter faces a tenfold increase for what is often a modest capacity gap.; What3words the free API plan includes no coordinate conversion, only AutoSuggest, and is rate limited to 5 requests per second
  • They diverge on capability: Fused covers User defined functions, What3words covers Core Functionality.
  • Prices and features above were last checked on 1 September 2026.

Where they differ

Only the attributes on which Fused and What3words actually diverge.

Attributes where Fused and What3words differ
AttributeFusedWhat3words
Starting priceFreeOn request
Pricing modelPer month by compute tierfreemium
Free tierYesNo
PlatformsWeb, Linux, macOS, WindowsWeb

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 Fused

  • User defined functions
  • Instant tile endpoints
  • HTTP API
  • Caching
  • Workbench
  • Data stack connectors
  • Public UDF catalogue
  • Local execution

Only in What3words

  • Core Functionality
  • User Interface

What people use each for

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

Fused

  • A data team that wants to publish a dynamic layer computed from a large Parquet dataset without standing up and operating a tile servernot What3words
  • An analyst prototyping against Overture, Sentinel or Census data who needs a working map in an afternoon rather than a data engineering ticketnot What3words
  • An application that needs a geospatial computation exposed as an HTTP endpoint, where the alternative is a container, a queue and an on-call rotanot What3words
  • A consultancy delivering an interactive constraint or suitability map to a client, computed live from source data rather than pre-baked into static tilesnot What3words

What3words

  • Referring to a 3 metre square location with three wordsnot Fused
  • Adding location entry to a delivery or dispatch appnot Fused
  • Converting between coordinates and what3words addresses via APInot Fused

Where each one falls short

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

Fused

  • The price steps are brutal: $20 to $200 to $2,000 a month with no intermediate tier, so a two-person team that outgrows Starter faces a tenfold increase for what is often a modest capacity gap.
  • Published tiers do not state the actual compute, storage or request allowances, so the only way to know whether $200 covers your workload is to run it and find out.
  • Fused is at pre-seed stage with a small team, and putting a customer-facing map behind a startup’s serverless platform is a continuity risk that a procurement review will flag.
  • It is Python-only and assumes competence with cloud-native geospatial formats; there is no path for an analyst who works in a desktop GIS and not in code.
  • Serverless execution means cold starts and per-tile latency on uncached views, so a first load of a heavy UDF over a wide area is noticeably slower than a pre-rendered tile set.

What3words

  • The free API plan includes no coordinate conversion, only AutoSuggest, and is rate limited to 5 requests per second
  • Converting to and from what3words addresses starts on the Basic plan at $9.99 per month for 1,000 conversions
  • Priority and developer support require the Standard plan at $45 per month
  • 24/7 phone support requires the Plus plan at $125 per month
  • Custom invoicing and annual payment require the Premium plan at $300 per month
  • Overage pricing is not published; the page states only that a fair usage policy applies
  • The three word address scheme is proprietary and licensed rather than open data

Pricing, plan by plan

Fused

Free
  • FreeFree
    • Workbench access
    • AI assistant
    • Local UDF runs
  • Starter$20/month
    • Secrets management
    • Higher compute limits
    • Office hours support
  • Developer$200/month
    • Dedicated jobs
    • GitHub integration
    • Expanded compute, storage and AI token allowance
  • Professional$2000/month
    • Team collaboration
    • Dedicated training
    • Substantially increased usage limits

What3words

On request

No published plan breakdown. See the What3words review.

Which should you pick?

Choose Fused if

  • You need user defined functions.
  • You want to start without paying.
  • You work on Web, Linux, macOS, Windows.
  • You also want instant tile endpoints.
Fused review

Choose What3words if

  • You need core functionality.
  • You also want user interface.
What3words review

Questions people ask

Is Fused or What3words better?
Neither clearly leads. Fused starts at Free and What3words at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Fused or What3words?
Fused has a free tier; the other does not. Paid plans start at Free for Fused and On request for What3words.
Does Fused or What3words run on more platforms?
Fused runs on Web, Linux, macOS, Windows. What3words runs on Web.
Can I use Fused for free?
Yes. Fused has a free tier, so you can try it without paying. What3words starts at On request.
What is Fused best used for?
Fused is most often used for a data team that wants to publish a dynamic layer computed from a large parquet dataset without standing up and operating a tile server, an analyst prototyping against overture, sentinel or census data who needs a working map in an afternoon rather than a data engineering ticket, an application that needs a geospatial computation exposed as an http endpoint, where the alternative is a container, a queue and an on-call rota, a consultancy delivering an interactive constraint or suitability map to a client, computed live from source data rather than pre-baked into static tiles. Of those, a data team that wants to publish a dynamic layer computed from a large parquet dataset without standing up and operating a tile server and an analyst prototyping against overture, sentinel or census data who needs a working map in an afternoon rather than a data engineering ticket are not what What3words is typically brought in for.
What can Fused do that What3words cannot?
Fused covers User defined functions, Instant tile endpoints, HTTP API, Caching. What3words covers Core Functionality, User Interface.

Answered from the vendors’ own pages

Fused: What does Fused actually give me?

A Python function becomes a map tile endpoint and an HTTP API on managed infrastructure, with caching, without you running a server.

Fused: How much does it cost?

Free, then $20, $200 and $2,000 per month for Starter, Developer and Professional. Usage allowances are not itemised publicly.

Fused: Can I run UDFs locally?

Yes, through the Python SDK, which is how most development is done before deploying.

Fused: Does it replace PostGIS or BigQuery?

No. It reads from them. Fused is the compute and serving layer, not the store.

Fused: Is it a mature company?

No. It is a small pre-seed San Francisco company. The technology is real; the vendor risk is real too.

Share

Related pages

More on Fused

More on What3words

Keep looking

Other head to heads