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APIs · head to head

Asyncapi vs MX Technologies

Asyncapi logo

Asyncapi

APIs

Specification and tools for defining asynchronous APIs

From
Free
Rated
-
Full reviewWebsite
MX Technologies logo

MX Technologies

APIs

US financial data aggregation with heavy transaction cleansing and enrichment

From
On request
Rated
-
Full reviewWebsite

The short version

  • Only Asyncapi has a free tier, so it costs nothing to try first.
  • Each has a real cost: Asyncapi complex to implement and debug asynchronous operations due to their non-linear and concurrent nature; MX Technologies coverage is United States focused, so any product with European or other international users runs a second aggregator and reconciles two data models, which removes most of the single vendor argument.
  • They diverge on capability: Asyncapi covers API Specification, MX Technologies covers Account aggregation.
  • Prices and features above were last checked on 31 August 2026.

Where they differ

Only the attributes on which Asyncapi and MX Technologies actually diverge.

Attributes where Asyncapi and MX Technologies differ
AttributeAsyncapiMX Technologies
Starting priceFreeOn request
Pricing modelopen-sourcequote
Free tierYesNo
PlatformsWeb, CLI, IDE ExtensionsAPI, Web
Founded2019Unknown

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 Asyncapi

  • API Specification
  • Code generation
  • Documentation
  • Multiple messaging protocols
  • Code generators
  • Specification support
  • Tools support
  • CLI support

Only in MX Technologies

  • Account aggregation
  • Transaction cleansing
  • Categorisation
  • Merchant resolution
  • Account verification
  • Balance and funds checks
  • Data enhancement APIs
  • Consent and connection management

What people use each for

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

Asyncapi

  • API Developmentnot MX Technologies
  • API Gatewaynot MX Technologies
  • API Testingnot MX Technologies
  • API Documentationnot MX Technologies
  • Microservicesnot MX Technologies

MX Technologies

  • A credit union building a personal finance view in its own app that needs its own transaction descriptions made readablenot Asyncapi
  • A lender using cash flow underwriting that needs categorised income and expense data rather than raw transaction stringsnot Asyncapi
  • A bank wanting account verification and balance checks before initiating ACH debits to reduce returnsnot Asyncapi
  • A fintech that already aggregates data elsewhere and licenses only the enrichment layer to clean what it hasnot Asyncapi

Where each one falls short

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

Asyncapi

  • Complex to implement and debug asynchronous operations due to their non-linear and concurrent nature
  • Keeping AsyncAPI documents up to date is challenging as systems evolve
  • Tracing and debugging asynchronous operations is more difficult than synchronous request-response patterns

MX Technologies

  • Coverage is United States focused, so any product with European or other international users runs a second aggregator and reconciles two data models, which removes most of the single vendor argument.
  • Nothing is published on price and contracts are enterprise shaped, so a small fintech cannot estimate cost or start building without a sales process, unlike self-serve competitors.
  • Data enhancement is the differentiator and is licensed separately from aggregation, so the quoted aggregation price is not the price of the product people actually buy it for.
  • Categorisation and merchant resolution are statistical and get business to business and unusual transactions wrong more often than consumer retail, so lending decisions built on categorised data need their own review layer.
  • As the United States moves to regulated API access, connection quality depends on what each institution exposes, and the long tail of small banks and credit unions remains the weakest part of any aggregator including this one.

Pricing, plan by plan

Asyncapi

Free
  • Open SourceFree
    • AsyncAPI specification
    • Tools
    • Community support

MX Technologies

On request
  • MX Platform$undefined/year
    • Priced by connected users, API calls and modules
    • Data enhancement licensed separately from aggregation
    • Enterprise contracts aimed at financial institutions

Which should you pick?

Choose Asyncapi if

  • You need api specification.
  • You want to start without paying.
  • You work on Web, CLI, IDE Extensions.
  • You also want code generation.
Asyncapi review

Choose MX Technologies if

  • You need account aggregation.
  • You work on API, Web.
  • You also want transaction cleansing.
MX Technologies review

Questions people ask

Is Asyncapi or MX Technologies better?
Neither clearly leads. Asyncapi starts at Free and MX Technologies at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Asyncapi or MX Technologies?
Asyncapi has a free tier; the other does not. Paid plans start at Free for Asyncapi and On request for MX Technologies.
Does Asyncapi or MX Technologies run on more platforms?
Asyncapi runs on Web, CLI, IDE Extensions. MX Technologies runs on API, Web.
Can I use Asyncapi for free?
Yes. Asyncapi has a free tier, so you can try it without paying. MX Technologies starts at On request.
What is Asyncapi best used for?
Asyncapi is most often used for api development, api gateway, api testing, api documentation. Of those, api development and api gateway are not what MX Technologies is typically brought in for.
What can Asyncapi do that MX Technologies cannot?
Asyncapi covers API Specification, Code generation, Documentation, Multiple messaging protocols. MX Technologies covers Account aggregation, Transaction cleansing, Categorisation, Merchant resolution.

Answered from the vendors’ own pages

Asyncapi: What is AsyncAPI used for?

AsyncAPI is an open-source specification for defining and documenting asynchronous APIs, message-driven systems, and event-driven architectures. It serves the same purpose for async APIs as OpenAPI does for REST APIs, providing standardized documentation, code generation, and tooling.

Source
MX Technologies: What does MX do that Plaid does not?

It sells transaction cleansing, categorisation and merchant resolution as a first class product, including on data you already hold, which is why financial institutions rather than startups are its core customers.

Asyncapi: Is AsyncAPI free to use?

Yes, AsyncAPI is completely free and open-source. It is hosted by the Linux Foundation and supported by community contributions and sponsorships from companies like Postman, IBM, IQVIA Technology, and Solace.

Source
MX Technologies: Does it cover Europe?

No. MX is United States focused. European coverage requires a different provider such as Tink.

Asyncapi: What protocols and technologies does AsyncAPI support?

AsyncAPI supports multiple protocols and technologies including Kafka, RabbitMQ, MQTT, Socket.IO, AWS EventBridge, and others. It provides language support for JavaScript/TypeScript, Python, Java, Go, C#/.NET, Kotlin, and PHP.

Source
MX Technologies: Is pricing published?

No. Contracts are quoted by connected users, call volume and modules, with enhancement licensed separately from aggregation.

Asyncapi: Does AsyncAPI have IDE support?

Yes, AsyncAPI has IDE extensions available for VSCode and IntelliJ, along with CLI utilities and GitHub Actions integration for developers.

Source
MX Technologies: Does it use screen scraping?

It uses direct bank APIs where institutions expose them and credential based connections elsewhere. The credential path is being deprecated across the industry, and coverage quality now tracks which banks have real APIs.

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