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Personal Finance · head to head

Firefly III vs Spring Cloud Gateway

Firefly III logo

Firefly III

Personal Finance

Free, open source, self-hosted personal finance manager with double-entry style accounting

From
Free
Rated
-
Full reviewWebsite
Spring Cloud Gateway logo

Spring Cloud Gateway

APIs

API gateway built on Project Reactor for building microservices

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Firefly III there is no official managed hosting, so a non-technical user has no easy on-ramp the way Actual Budget offers with its paid hosted sync.; Spring Cloud Gateway released under the Apache 2.0 license, free and open source with no commercial tier
  • They diverge on capability: Firefly III covers Double-entry style ledger, Spring Cloud Gateway covers Routing.
  • Prices and features above were last checked on 1 September 2026.

Where they differ

Only the attributes on which Firefly III and Spring Cloud Gateway actually diverge.

Attributes where Firefly III and Spring Cloud Gateway differ
AttributeFirefly IIISpring Cloud Gateway
Pricing modelOpen source, no licence feeopen-source
PlatformsWeb, Linux, DockerJava, Spring Boot
CategoryPersonal FinanceAPIs
FoundedUnknown1998

Identical on both: starting price (Free), free tier (Yes), user rating (Not yet rated).

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 Firefly III

  • Double-entry style ledger
  • Multi-currency accounts
  • Bill and subscription tracking
  • Rule engine
  • Reports and charts
  • API access

Only in Spring Cloud Gateway

  • Routing
  • Path Rewriting
  • Circuit Breaker
  • Spring Boot
  • Spring Security
  • Spring Cloud
  • Java support
  • Spring Boot support

What people use each for

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

Firefly III

  • A self-hoster already running a home server or NAS who wants their financial ledger on the same infrastructurenot Spring Cloud Gateway
  • Someone who wants double-entry style accuracy rather than simple envelope budgetingnot Spring Cloud Gateway
  • A privacy-focused user who refuses to put financial data on any third-party server, hosted or otherwisenot Spring Cloud Gateway
  • A developer who wants API access to build custom bank import scripts for accounts with no standard connectornot Spring Cloud Gateway

Spring Cloud Gateway

  • API Developmentnot Firefly III
  • API Gatewaynot Firefly III
  • API Testingnot Firefly III
  • API Documentationnot Firefly III
  • Microservicesnot Firefly III

Where each one falls short

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

Firefly III

  • There is no official managed hosting, so a non-technical user has no easy on-ramp the way Actual Budget offers with its paid hosted sync.
  • The double-entry-influenced model is less intuitive for newcomers than simple envelope budgeting, and the learning curve is real.
  • Automatic bank sync depends on the community-run importer and third-party connectors, and coverage and reliability vary a lot by bank and country.
  • Mobile access is via a web interface rather than a polished native app, which is a step behind Actual Budget or Lunch Money on phones.
  • Because there is no company behind it, security patching and feature development depend entirely on volunteer maintainer time.

Spring Cloud Gateway

  • Released under the Apache 2.0 license, free and open source with no commercial tier

Pricing, plan by plan

Firefly III

Free
  • Firefly IIIFree
    • Full functionality, self-hosted
    • No usage limits
    • Community support, donations accepted

Spring Cloud Gateway

Free
  • Open SourceFree
    • Core Spring Cloud Gateway
    • Community support

Which should you pick?

Choose Firefly III if

  • You need double-entry style ledger.
  • You want to start without paying.
  • You work on Web, Linux, Docker.
  • You also want multi-currency accounts.
Firefly III review

Choose Spring Cloud Gateway if

  • You need routing.
  • You want to start without paying.
  • You work on Java, Spring Boot.
  • You also want path rewriting.
Spring Cloud Gateway review

Questions people ask

Is Firefly III or Spring Cloud Gateway better?
Neither clearly leads. Firefly III starts at Free and Spring Cloud Gateway at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Firefly III or Spring Cloud Gateway?
Firefly III starts at Free and Spring Cloud Gateway at Free.
Does Firefly III or Spring Cloud Gateway run on more platforms?
Firefly III runs on Web, Linux, Docker. Spring Cloud Gateway runs on Java, Spring Boot.
Can I use Firefly III for free?
Both have a free tier, so you can try either at no cost before committing.
What is Firefly III best used for?
Firefly III is most often used for a self-hoster already running a home server or nas who wants their financial ledger on the same infrastructure, someone who wants double-entry style accuracy rather than simple envelope budgeting, a privacy-focused user who refuses to put financial data on any third-party server, hosted or otherwise, a developer who wants api access to build custom bank import scripts for accounts with no standard connector. Of those, a self-hoster already running a home server or nas who wants their financial ledger on the same infrastructure and someone who wants double-entry style accuracy rather than simple envelope budgeting are not what Spring Cloud Gateway is typically brought in for.
What can Firefly III do that Spring Cloud Gateway cannot?
Firefly III covers Double-entry style ledger, Multi-currency accounts, Bill and subscription tracking, Rule engine. Spring Cloud Gateway covers Routing, Path Rewriting, Circuit Breaker, Spring Boot.

Answered from the vendors’ own pages

Firefly III: Can I pay someone to host Firefly III for me?

Not through the core project; some third-party providers sell Firefly III hosting independently, but there is no official managed service.

Spring Cloud Gateway: Is Spring Cloud Gateway free?

Yes, Spring Cloud Gateway is free and open-source software. It is part of the Spring ecosystem and available through GitHub repositories with open-source dependencies like spring-cloud-starter-gateway-server-webflux and spring-cloud-starter-gateway-server-webmvc.

Source
Firefly III: Does it support multiple currencies?

Yes, natively, including accounts and transactions in different currencies.

Spring Cloud Gateway: What enterprise support is available for Spring Cloud Gateway?

Tanzu Spring provides optional enterprise support including Day 0 access to security patches for organizations requiring guaranteed support, but specific pricing is not published on the Spring Cloud Gateway project page.

Source
Firefly III: Is it really free with no paid tier?

Yes, the software is free and open source under the AGPL; the project accepts donations but sells nothing.

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