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APIs · head to head

KeystoneJS vs Zimpler

KeystoneJS logo

KeystoneJS

APIs

Powerful Node.js headless CMS framework and API platform

From
Free
Rated
-
Full reviewWebsite
Zimpler logo

Zimpler

APIs

Nordic and Brazilian account-to-account payments for regulated high-risk sectors

From
On request
Rated
-
Full reviewWebsite

The short version

  • Only KeystoneJS has a free tier, so it costs nothing to try first.
  • Each has a real cost: KeystoneJS database support is limited to PostgreSQL, MySQL and SQLite; Zimpler pricing is not published and is set by industry and risk profile, so smaller merchants cannot benchmark a quote and often discover they are paying well above a general-purpose provider.
  • They diverge on capability: KeystoneJS covers REST API, Zimpler covers Bank payments.
  • Prices and features above were last checked on 1 September 2026.

Where they differ

Only the attributes on which KeystoneJS and Zimpler actually diverge.

Attributes where KeystoneJS and Zimpler differ
AttributeKeystoneJSZimpler
Starting priceFreeOn request
Pricing modelopen-sourcequote
Free tierYesNo
PlatformsNode.js, Self-hostedWeb, REST API
Founded2016Unknown

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 KeystoneJS

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

Only in Zimpler

  • Bank payments
  • BankID identity
  • Payouts
  • Recurring payments
  • Risk screening
  • Brazil coverage

What people use each for

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

KeystoneJS

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

Zimpler

  • A Swedish gambling operator needing deposit and verified identity in a single customer flownot KeystoneJS
  • A Nordic merchant wanting instant bank payouts rather than card refundsnot KeystoneJS
  • A trading platform where confirming account ownership before funding is a regulatory requirementnot KeystoneJS
  • A European operator expanding into Brazil and wanting one provider across both marketsnot KeystoneJS

Where each one falls short

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

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

Zimpler

  • Pricing is not published and is set by industry and risk profile, so smaller merchants cannot benchmark a quote and often discover they are paying well above a general-purpose provider.
  • As a payment facilitator carrying merchant risk, it declines or offboards merchants on risk grounds, which makes it a dependency you cannot assume will persist.
  • Its strength is concentrated in the Nordics, and coverage in southern and eastern Europe is thinner than pan-European account-to-account specialists.
  • Revenue concentration in iGaming ties the provider to a sector under constant regulatory change, so licence changes in one market affect the supplier as well as the merchant.
  • Bank transfers have no chargeback protection, so disputes are handled commercially and consumers used to card protections may resist the payment method.

Pricing, plan by plan

KeystoneJS

Free
  • Open SourceFree
    • Full KeystoneJS
    • Community support

Zimpler

On request
  • Zimpler payments$undefined/year
    • Per-transaction pricing quoted by industry, risk and volume
    • Separate pricing for payouts and identity verification
    • Merchant underwriting required, with sector restrictions

Which should you pick?

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

Choose Zimpler if

  • You need bank payments.
  • You work on Web, REST API.
  • You also want bankid identity.
Zimpler review

Questions people ask

Is KeystoneJS or Zimpler better?
Neither clearly leads. KeystoneJS starts at Free and Zimpler at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, KeystoneJS or Zimpler?
KeystoneJS has a free tier; the other does not. Paid plans start at Free for KeystoneJS and On request for Zimpler.
Does KeystoneJS or Zimpler run on more platforms?
KeystoneJS runs on Node.js, Self-hosted. Zimpler runs on Web, REST API.
Can I use KeystoneJS for free?
Yes. KeystoneJS has a free tier, so you can try it without paying. Zimpler starts at On request.
What is KeystoneJS best used for?
KeystoneJS is most often used for headless cms implementation, content management systems, customizable api-driven applications. Of those, headless cms implementation and content management systems are not what Zimpler is typically brought in for.
What can KeystoneJS do that Zimpler cannot?
KeystoneJS covers REST API, GraphQL API, Admin interface, Node.js. Zimpler covers Bank payments, BankID identity, Payouts, Recurring payments.

Answered from the vendors’ own pages

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
Zimpler: Which markets does Zimpler cover?

Sweden and the Nordics primarily, plus the wider EU and Brazil. It is strongest where national electronic identity schemes exist.

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
Zimpler: Does it handle identity verification?

Yes. In the Nordics it captures BankID identity alongside the payment, which removes a separate verification step.

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
Zimpler: Is pricing published?

No. It is quoted per merchant based on sector, risk and volume, and merchants must pass underwriting first.

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