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APIs · head to head

Codat vs KeystoneJS

Codat logo

Codat

APIs

One API for small business accounting, banking and commerce data

From
On request
Rated
-
Full reviewWebsite
KeystoneJS logo

KeystoneJS

APIs

Powerful Node.js headless CMS framework and API platform

From
Free
Rated
-
Full reviewWebsite

The short version

  • Only KeystoneJS has a free tier, so it costs nothing to try first.
  • Each has a real cost: Codat the accounting platforms are metering developer access themselves, with Xero introducing tiered connection based developer pricing from 2 March 2026, so a cost you do not control has been inserted between you and the data and it scales with the number of customers you connect.; KeystoneJS database support is limited to PostgreSQL, MySQL and SQLite
  • They diverge on capability: Codat covers Normalised accounting API, KeystoneJS covers REST API.
  • Prices and features above were last checked on 31 August 2026.

Where they differ

Only the attributes on which Codat and KeystoneJS actually diverge.

Attributes where Codat and KeystoneJS differ
AttributeCodatKeystoneJS
Starting priceOn requestFree
Pricing modelquoteopen-source
Free tierNoYes
PlatformsAPI, WebNode.js, Self-hosted
FoundedUnknown2016

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 Codat

  • Normalised accounting API
  • Banking and commerce data
  • Lending products
  • Write-back
  • Business verification
  • Supplier onboarding
  • Connection management
  • Data quality handling

Only in KeystoneJS

  • REST API
  • GraphQL API
  • Admin interface
  • Node.js
  • Next.js
  • React
  • Databases
  • Node.js support

What people use each for

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

Codat

  • A business lender that wants live ledger data for underwriting rather than a borrower emailing exported PDF accountsnot KeystoneJS
  • A commercial bank monitoring covenant compliance across a portfolio of small business borrowers continuously rather than quarterlynot KeystoneJS
  • A payment company verifying a merchant trading history before extending working capitalnot KeystoneJS
  • A B2B platform writing bills and payments back into a customer accounting system so reconciliation happens automaticallynot KeystoneJS

KeystoneJS

  • Headless CMS implementationnot Codat
  • Content management systemsnot Codat
  • Customizable API-driven applicationsnot Codat

Where each one falls short

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

Codat

  • The accounting platforms are metering developer access themselves, with Xero introducing tiered connection based developer pricing from 2 March 2026, so a cost you do not control has been inserted between you and the data and it scales with the number of customers you connect.
  • Pricing is opaque and enterprise shaped for a product developers expect to evaluate technically first, so build decisions get made before anyone knows the unit economics.
  • Normalisation hides but does not remove the underlying differences between accounting systems, and edge cases in multi-currency, journals and tax handling surface as data quality problems that your team must reason about in each source system anyway.
  • Data quality depends on the small business keeping its books properly, so a lender using ledger data for underwriting inherits the bookkeeping standard of its worst borrower and needs its own validation layer regardless.
  • Connection breakage from expired tokens and platform API changes is an ongoing operational load, and a borrower whose connection lapses stops being monitored silently, which is the failure mode that matters most in a lending portfolio.

KeystoneJS

  • Database support is limited to PostgreSQL, MySQL and SQLite
  • Keystone 5 is a separate legacy product documented on a different site and is not covered by the Keystone 6 docs
  • Upgrading requires following a dedicated Migrate to 8.0.0 guide, so major versions are not drop-in
  • Free support is a community Slack; enterprise-grade consulting and support is a separate paid engagement with Thinkmill and no published price

Pricing, plan by plan

Codat

On request
  • Codat Platform$undefined/year
    • Priced by connected companies, data types and products
    • Lending and verification products priced above core data access
    • Annual enterprise agreements

KeystoneJS

Free
  • Open SourceFree
    • Full KeystoneJS
    • Community support

Which should you pick?

Choose Codat if

  • You need normalised accounting api.
  • You work on API, Web.
  • You also want banking and commerce data.
Codat review

Choose KeystoneJS if

  • You need rest api.
  • You want to start without paying.
  • You work on Node.js, Self-hosted.
  • You also want graphql api.
KeystoneJS review

Questions people ask

Is Codat or KeystoneJS better?
Neither clearly leads. Codat starts at On request and KeystoneJS at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Codat or KeystoneJS?
KeystoneJS has a free tier; the other does not. Paid plans start at On request for Codat and Free for KeystoneJS.
Does Codat or KeystoneJS run on more platforms?
Codat runs on API, Web. KeystoneJS runs on Node.js, Self-hosted.
Can I use KeystoneJS for free?
Yes. KeystoneJS has a free tier, so you can try it without paying. Codat starts at On request.
What is Codat best used for?
Codat is most often used for a business lender that wants live ledger data for underwriting rather than a borrower emailing exported pdf accounts, a commercial bank monitoring covenant compliance across a portfolio of small business borrowers continuously rather than quarterly, a payment company verifying a merchant trading history before extending working capital, a b2b platform writing bills and payments back into a customer accounting system so reconciliation happens automatically. Of those, a business lender that wants live ledger data for underwriting rather than a borrower emailing exported pdf accounts and a commercial bank monitoring covenant compliance across a portfolio of small business borrowers continuously rather than quarterly are not what KeystoneJS is typically brought in for.
What can Codat do that KeystoneJS cannot?
Codat covers Normalised accounting API, Banking and commerce data, Lending products, Write-back. KeystoneJS covers REST API, GraphQL API, Admin interface, Node.js.

Answered from the vendors’ own pages

Codat: What is changing with Xero in 2026?

Xero is introducing a tiered, usage based developer pricing model effective 2 March 2026, with tiers based on the number of customer connections an app holds. That is a new cost in the chain for anyone reading Xero data at scale, whether directly or through Codat.

KeystoneJS: Is KeystoneJS free?

Yes, KeystoneJS is free and open source with no licensing fees. Core platform has no lock-in and is contributed to by 250+ developers.

Source
Codat: Can Codat write data back?

Yes. It supports pushing bills, payments and journal entries into accounting systems, not only reading from them.

KeystoneJS: What are hosting costs for KeystoneJS?

KeystoneJS is self-hosted and deployment-agnostic. Hosting costs depend on your chosen deployment platform (Vercel, AWS, Heroku, etc.) and infrastructure, not KeystoneJS itself.

Source
Codat: Is pricing published?

No. It is quoted by connected companies, data types and products, and users consistently describe it as opaque.

KeystoneJS: Does KeystoneJS offer paid support?

Enterprise support with tailored options is available from Thinkmill, the company behind KeystoneJS. Pricing details available upon request.

Source
Codat: Does it replace bank data aggregation?

Not entirely. It covers banking alongside accounting and commerce, but lenders commonly run it beside a bank aggregator for transaction level cash flow.

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