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APIs · head to head

Kong Gateway vs Rutter

Kong Gateway logo

Kong Gateway

APIs

Open-source and cloud API gateway for managing microservices traffic

From
Free
Rated
-
Full reviewWebsite
Rutter logo

Rutter

APIs

One API across accounting, commerce, payments and advertising platforms

From
On request
Rated
-
Full reviewWebsite

The short version

  • Only Kong Gateway has a free tier, so it costs nothing to try first.
  • Each has a real cost: Kong Gateway the free open-source gateway lacks the analytics, portals, and support of the paid Konnect tiers.; Rutter a unified schema exposes only the fields common across platforms, so the platform-specific detail underwriting models want usually requires passthrough calls and per-platform code, which is the work the unified API was bought to avoid.
  • They diverge on capability: Kong Gateway covers API request routing, Rutter covers Accounting and ERP.
  • Prices and features above were last checked on 31 August 2026.

Where they differ

Only the attributes on which Kong Gateway and Rutter actually diverge.

Attributes where Kong Gateway and Rutter differ
AttributeKong GatewayRutter
Starting priceFreeOn request
Pricing modelfreemiumquote
Free tierYesNo
Platformsweb, linux, apiWeb, API
Founded2017Unknown

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 Kong Gateway

  • API request routing
  • Plugin ecosystem
  • Developer portals
  • AI Gateway
  • Analytics and observability
  • SSO and audit logs

Only in Rutter

  • Accounting and ERP
  • Commerce data
  • Payments data
  • Advertising data
  • Write operations
  • Passthrough requests
  • Observability tooling
  • Sandbox

What people use each for

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

Kong Gateway

  • Routing and securing traffic across microservicesnot Rutter
  • Publishing internal or external developer portalsnot Rutter
  • Managing rate limits and authentication at the API edgenot Rutter
  • Gateway-level routing to multiple LLM providersnot Rutter

Rutter

  • A revenue-based lender that must pull a merchant's sales, payouts and general ledger before pricing a facilitynot Kong Gateway
  • A spend management product that needs to push bills and journal entries back into whichever accounting system its customer runsnot Kong Gateway
  • A B2B payments platform reconciling invoices across customers using four different ERPsnot Kong Gateway
  • An insurance or benefits provider that needs verified business financials without asking the customer to upload PDFsnot Kong Gateway

Where each one falls short

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

Kong Gateway

  • The free open-source gateway lacks the analytics, portals, and support of the paid Konnect tiers.
  • Plus tier caps API requests at 1M/month before incurring per-million overage charges.
  • Enterprise pricing is custom and not published, making budgeting harder without sales contact.
  • Configuration and plugin management can require significant operational expertise to run at scale.

Rutter

  • A unified schema exposes only the fields common across platforms, so the platform-specific detail underwriting models want usually requires passthrough calls and per-platform code, which is the work the unified API was bought to avoid.
  • Write operations into accounting systems are where these products break, because each system validates differently, and a rejected journal entry surfaces as a support ticket against you rather than against the ERP.
  • No pricing is published beyond a sandbox trial, so cost cannot be compared against alternatives without a sales process, and pricing tends to scale with connected accounts.
  • QuickBooks Desktop and other on-premises systems require a local connector or hosted agent, which introduces installation steps your customers must complete and support burden you inherit.
  • Sync freshness varies by platform and by customer authorisation state, so a product promising near real-time figures will find some connections update far less often than the marketing implies.

Pricing, plan by plan

Kong Gateway

Free
  • Free TrialFree
    • 30-day enterprise functionality trial
    • Unlimited gateways
    • 30-day analytics retention
  • Plus$undefined/month
    • Up to 5 serverless, 2 hybrid, 2 dedicated cloud gateways
    • 1M API requests/month included
    • Up to 2 developer portals
  • Enterprise$undefined/month
    • Unlimited hybrid and dedicated cloud gateways
    • Unlimited developer portals
    • SSO and audit logs

Rutter

On request
  • Starter$undefined/month
    • Thirty day sandbox trial
    • Test integrations with QuickBooks, Xero, FreshBooks and Zoho Books
    • Documentation and workflow guides
  • Full Access$undefined/year
    • Production access across all platforms
    • Includes NetSuite, QuickBooks Desktop and Sage Intacct
    • Write operations and passthrough

Which should you pick?

Choose Kong Gateway if

  • You need api request routing.
  • You want to start without paying.
  • You work on web, linux, api.
  • You also want plugin ecosystem.
Kong Gateway review

Choose Rutter if

  • You need accounting and erp.
  • You work on Web, API.
  • You also want commerce data.
Rutter review

Questions people ask

Is Kong Gateway or Rutter better?
Neither clearly leads. Kong Gateway starts at Free and Rutter at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Kong Gateway or Rutter?
Kong Gateway has a free tier; the other does not. Paid plans start at Free for Kong Gateway and On request for Rutter.
Does Kong Gateway or Rutter run on more platforms?
Kong Gateway runs on web, linux, api. Rutter runs on Web, API.
Can I use Kong Gateway for free?
Yes. Kong Gateway has a free tier, so you can try it without paying. Rutter starts at On request.
What is Kong Gateway best used for?
Kong Gateway is most often used for routing and securing traffic across microservices, publishing internal or external developer portals, managing rate limits and authentication at the api edge, gateway-level routing to multiple llm providers. Of those, routing and securing traffic across microservices and publishing internal or external developer portals are not what Rutter is typically brought in for.
What can Kong Gateway do that Rutter cannot?
Kong Gateway covers API request routing, Plugin ecosystem, Developer portals, AI Gateway. Rutter covers Accounting and ERP, Commerce data, Payments data, Advertising data.

Answered from the vendors’ own pages

Kong Gateway: Is Kong Gateway free?

Kong's core gateway is open source and free to self-host. Kong Konnect, the managed cloud platform, offers a 30-day free trial before moving to paid Plus or custom Enterprise pricing.

Source
Rutter: Does Rutter support QuickBooks Desktop?

Yes, which distinguishes it from unified APIs that only cover cloud accounting, and matters because many small businesses still run it.

Kong Gateway: How is usage metered on the Plus plan?

The Plus plan includes 1M API requests per month, with additional usage billed at $200 per extra 1 million requests up to a 10M/month cap, plus per-gateway and per-LLM-model charges.

Source
Rutter: Can Rutter write data back?

Yes. Invoices, bills and journal entries can be pushed into supported accounting systems, not only read.

Kong Gateway: What support is included?

Plus includes email support with a 2-business-day SLA, while Enterprise adds dedicated success managers and professional services.

Source
Rutter: Is there a free tier?

There is a thirty day sandbox trial with test data. Production access requires a paid plan with quoted pricing.

Rutter: What if the unified model lacks a field I need?

Rutter supports passthrough requests to the underlying platform API, though using them reintroduces platform-specific code.

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