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APIs · head to head

AWS API Gateway vs Bud Financial

AWS API Gateway logo

AWS API Gateway

APIs

Fully managed API gateway service for creating and managing APIs at scale

From
Free
Rated
-
Full reviewWebsite
Bud Financial logo

Bud Financial

APIs

Transaction enrichment and customer intelligence for banks, built on UK open banking data

From
On request
Rated
-
Full reviewWebsite

The short version

  • Only AWS API Gateway has a free tier, so it costs nothing to try first.
  • Each has a real cost: AWS API Gateway rEST APIs cost $3.50 per million calls against $1.00 for HTTP APIs, so the older and more featureful type is three and a half times dearer; Bud Financial it is an enrichment and intelligence layer, not connectivity, so most buyers also pay an aggregator and the total cost of the open banking stack is higher than the Bud contract suggests.
  • They diverge on capability: AWS API Gateway covers REST APIs, Bud Financial covers Transaction enrichment.
  • Prices and features above were last checked on 31 August 2026.

Where they differ

Only the attributes on which AWS API Gateway and Bud Financial actually diverge.

Attributes where AWS API Gateway and Bud Financial differ
AttributeAWS API GatewayBud Financial
Starting priceFreeOn request
Pricing modelusage-basedquote
Free tierYesNo
PlatformsAWS CloudWeb
Founded2006Unknown

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

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 AWS API Gateway

  • REST APIs
  • WebSocket APIs
  • HTTP APIs
  • Lambda
  • EC2
  • DynamoDB
  • CloudWatch
  • IAM

Only in Bud Financial

  • Transaction enrichment
  • Recurring payment detection
  • Income and affordability
  • Drive customer intelligence
  • Engage
  • Open banking connectivity
  • Segmentation and next best action
  • Data model consistency

What people use each for

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

AWS API Gateway

  • Fronting Lambda functions with an HTTP endpointnot Bud Financial
  • REST and HTTP API management with throttling and keysnot Bud Financial
  • WebSocket APIs for real-time clientsnot Bud Financial
  • Private APIs reachable only inside a VPCnot Bud Financial
  • Publishing a developer portal for API consumersnot Bud Financial

Bud Financial

  • A bank whose transaction feed is unreadable to its own analytics team and which needs merchant and category resolution before any personalisation is possiblenot AWS API Gateway
  • A lender running affordability assessments from bank data that needs income and committed spend classified consistently across institutionsnot AWS API Gateway
  • A banking application adding money management features where users expect recognisable merchant names and logos rather than raw card descriptorsnot AWS API Gateway
  • An institution trying to identify customers in financial difficulty early from changes in recurring commitments and income patternsnot AWS API Gateway

Where each one falls short

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

AWS API Gateway

  • REST APIs cost $3.50 per million calls against $1.00 for HTTP APIs, so the older and more featureful type is three and a half times dearer
  • Data transfer out is charged at $0.09 per GB on top of request pricing
  • WebSocket APIs bill connection minutes as well as messages, at $0.25 per million minutes
  • Private APIs avoid data transfer charges but incur AWS PrivateLink costs instead
  • The developer portal is $125 a month, with additional portal products at $12.50 each
  • The free tier lasts 12 months rather than being ongoing

Bud Financial

  • It is an enrichment and intelligence layer, not connectivity, so most buyers also pay an aggregator and the total cost of the open banking stack is higher than the Bud contract suggests.
  • Categorisation accuracy is market specific, and merchant coverage tuned for the UK does not transfer cleanly to other countries, so non-UK buyers should insist on accuracy testing against their own data.
  • Sending complete customer transaction histories to a third party triggers a data protection and vendor risk review at any bank, and that process routinely takes longer than the technical integration itself.
  • Pricing is unpublished and blends a committed fee with usage, so an institution whose enriched volume grows faster than the value it extracts can find the contract repricing against it at renewal.
  • The product set spans enrichment, decisioning, staff analytics and consumer features, which means a buyer wanting only enrichment may be steered towards a broader platform commitment than the problem requires.

Pricing, plan by plan

AWS API Gateway

Free
  • Free Tier (12 months)Free
    • 1M REST API calls per month
    • 1M HTTP API calls per month
    • 1M WebSocket messages plus 750K connection minutes per month
  • HTTP APIs$1/per million requests (first 300M)
    • First 300M: $1.00 per million
    • Next 132M: $0.90 per million
    • Data transfer varies by volume
  • REST APIs$3.5/per million API calls
    • Edge Optimized and Regional: $3.50 per million (first tier)
    • Higher volumes: $2.80 then $2.38 per million
    • Data transfer: $0.09 per GB
  • WebSocket APIs$1/per million messages
    • Messages: $1.00 per million
    • Connection minutes: $0.25 per million minutes

Bud Financial

On request
  • Bud Platform$undefined/year
    • Recurring committed fee plus usage-based charges, quoted
    • Priced by product mix across Enrich, Assess, Drive and Engage
    • Volume-based pricing on enriched transactions

Which should you pick?

Choose AWS API Gateway if

  • You need rest apis.
  • You want to start without paying.
  • You work on AWS Cloud.
  • You also want websocket apis.
AWS API Gateway review

Choose Bud Financial if

  • You need transaction enrichment.
  • You also want recurring payment detection.
Bud Financial review

Questions people ask

Is AWS API Gateway or Bud Financial better?
Neither clearly leads. AWS API Gateway starts at Free and Bud Financial at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, AWS API Gateway or Bud Financial?
AWS API Gateway has a free tier; the other does not. Paid plans start at Free for AWS API Gateway and On request for Bud Financial.
Does AWS API Gateway or Bud Financial run on more platforms?
AWS API Gateway runs on AWS Cloud. Bud Financial runs on Web.
Can I use AWS API Gateway for free?
Yes. AWS API Gateway has a free tier, so you can try it without paying. Bud Financial starts at On request.
What is AWS API Gateway best used for?
AWS API Gateway is most often used for fronting lambda functions with an http endpoint, rest and http api management with throttling and keys, websocket apis for real-time clients, private apis reachable only inside a vpc. Of those, fronting lambda functions with an http endpoint and rest and http api management with throttling and keys are not what Bud Financial is typically brought in for.
What can AWS API Gateway do that Bud Financial cannot?
AWS API Gateway covers REST APIs, WebSocket APIs, HTTP APIs, Lambda. Bud Financial covers Transaction enrichment, Recurring payment detection, Income and affordability, Drive customer intelligence.

Answered from the vendors’ own pages

AWS API Gateway: How much does AWS API Gateway cost?

AWS API Gateway pricing varies by API type. HTTP APIs cost $1.00 per million requests for the first 300M monthly, then $0.90 per million. REST APIs cost $3.50 per million, and WebSocket APIs cost $1.00 per million messages plus $0.25 per million connection minutes. Data transfer charges ($0.09 per GB) apply separately.

Source
Bud Financial: Does Bud provide open banking connections?

It can, but its differentiator is enrichment of transaction data. Many customers already have the data and buy Bud to make it usable.

AWS API Gateway: Is AWS API Gateway free?

New AWS customers receive 12 months of free tier access including 1 million REST API calls, 1 million HTTP API calls, and 1 million WebSocket messages plus 750,000 connection minutes per month. Starting July 15, 2025, new customers receive up to $200 in AWS Free Tier credits.

Source
Bud Financial: Is it UK only?

It is UK founded and its merchant coverage is strongest there, with expansion into the US. Accuracy outside the UK should be tested on your own data.

AWS API Gateway: What is the price difference between HTTP and REST APIs?

HTTP APIs are significantly cheaper at $1.00 per million requests compared to REST APIs at $3.50 per million (first tier). REST API pricing decreases to $2.80 and $2.38 per million for higher volumes, while HTTP API pricing drops to $0.90 per million after 300M monthly requests.

Source
Bud Financial: What does it cost?

Not published. Typically a recurring committed fee plus usage-based charges, priced by product mix and enriched transaction volume.

AWS API Gateway: How much does an API Gateway Portal cost?

API Gateway Portals require a base fee of $125 per month (includes 10 PortalProducts with 40 endpoints each) plus $12.50 per month for each additional PortalProduct beyond the included 10.

Source
Bud Financial: Why not build categorisation in house?

Because it is not a one-off build. Merchant naming changes continuously and an in-house model degrades unless someone maintains it permanently, which is the cost most institutions underestimate.

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