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Developer Tools · head to head

Prettier vs Thought Machine

Prettier logo

Prettier

Developer Tools

Opinionated code formatter

From
Free
Free plan
Yes
Full reviewWebsite
Thought Machine logo

Thought Machine

Technology

Cloud native core banking where products are written as smart contracts

From
On request
Free plan
No
Full reviewWebsite

The short version

  • Only Prettier has a free tier, so it costs nothing to try first.
  • Each has a real cost: Prettier inflexible style rules that cannot be customized significantly, forcing teams to accept opinionated defaults; Thought Machine a core replacement is a two to four year programme at an established bank, and the licence is a minority of total cost against system integrator fees, parallel running and data migration.
  • Prices and features above were last checked on 1 September 2026.

Where they differ

Only the attributes on which Prettier and Thought Machine actually diverge.

Attributes where Prettier and Thought Machine differ
AttributePrettierThought Machine
Starting priceFreeOn request
Pricing modelfreequote
Free tierYesNo
PlatformsCLI, Editor Plugins, Build ToolsWeb, API, Cloud
CategoryDeveloper ToolsTechnology
Founded2016Unknown

Identical on both: 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 Prettier

Nothing recorded that Thought Machine does not also cover.

Only in Thought Machine

  • Smart contract product engine
  • Cloud native architecture
  • Real time ledger
  • Vault Payments
  • API first design
  • Multi entity and multi currency
  • Product versioning and testing
  • Configurable posting rules

What people use each for

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

Prettier

  • Automatically formatting TypeScript files to project style standardsnot Thought Machine
  • Enforcing consistent HTML indentation across component filesnot Thought Machine
  • Removing style-related comments from pull request reviewsnot Thought Machine
  • Formatting GraphQL queries with consistent indentationnot Thought Machine

Thought Machine

  • A large bank launching a separate digital brand on a clean core rather than migrating the back booknot Prettier
  • A bank whose product launches are blocked by vendor change requests on a legacy corenot Prettier
  • An institution needing real time balances and postings for instant payment obligationsnot Prettier
  • A group consolidating multiple country cores onto one multi entity platformnot Prettier

Where each one falls short

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

Prettier

  • Inflexible style rules that cannot be customized significantly, forcing teams to accept opinionated defaults
  • Developers must format entire files rather than selective line ranges in some contexts
  • Limited language support compared to some alternatives, though it covers major languages

Thought Machine

  • A core replacement is a two to four year programme at an established bank, and the licence is a minority of total cost against system integrator fees, parallel running and data migration.
  • The smart contract model presumes a bank can write and maintain Python financial products, and institutions without that engineering capability end up outsourcing the very flexibility they bought.
  • Cloud infrastructure cost sits with the bank and is not trivial at scale, so total cost of ownership comparisons against a hosted legacy core often miss a large recurring line.
  • Thought Machine has made two rounds of job cuts pursuing profitability, which is a legitimate supplier stability concern for a system a bank expects to run for fifteen years.
  • The functional footprint is core ledger and product engine, so origination, collections, regulatory reporting and channels all come from other vendors, and the integration estate around Vault is the bank's problem to design and own.

Pricing, plan by plan

Prettier

Free

No published plan breakdown. See the Prettier review.

Thought Machine

On request
  • Vault Core$undefined/year
    • Quoted per institution, typically on account volumes or annual contract value
    • Implementation and system integrator costs commonly exceed the licence fee
    • Cloud infrastructure costs are the bank's and are not included

Which should you pick?

Choose Prettier if

  • You want to start without paying.
  • You work on CLI, Editor Plugins, Build Tools.
Prettier review

Choose Thought Machine if

  • You need smart contract product engine.
  • You work on Web, API, Cloud.
  • You also want cloud native architecture.
Thought Machine review

Questions people ask

Is Prettier or Thought Machine better?
Neither clearly leads. Prettier starts at Free and Thought Machine at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Prettier or Thought Machine?
Prettier has a free tier; the other does not. Paid plans start at Free for Prettier and On request for Thought Machine.
Does Prettier or Thought Machine run on more platforms?
Prettier runs on CLI, Editor Plugins, Build Tools. Thought Machine runs on Web, API, Cloud.
Can I use Prettier for free?
Yes. Prettier has a free tier, so you can try it without paying. Thought Machine starts at On request.
What is Prettier best used for?
Prettier is most often used for automatically formatting typescript files to project style standards, enforcing consistent html indentation across component files, removing style-related comments from pull request reviews, formatting graphql queries with consistent indentation. Of those, automatically formatting typescript files to project style standards and enforcing consistent html indentation across component files are not what Thought Machine is typically brought in for.
What can Prettier do that Thought Machine cannot?
Thought Machine covers Smart contract product engine, Cloud native architecture, Real time ledger, Vault Payments.

Answered from the vendors’ own pages

Prettier: Is Prettier free and open source?

Yes, Prettier is completely free and open source, available as an npm package with no licensing costs or subscriptions.

Source
Thought Machine: Is Vault Core genuinely cloud native?

Yes. It is containerised, runs on Kubernetes on public cloud, and posts in real time rather than in overnight batch.

Prettier: Can Prettier be integrated with ESLint?

Yes, Prettier integrates with ESLint by disabling ESLint formatting rules via eslint-config-prettier, allowing both tools to work together with Prettier handling formatting and ESLint handling code quality.

Source
Thought Machine: How long does a migration take?

Eighteen months at the absolute fastest for a narrow greenfield launch; two to four years for a phased migration at an established bank.

Prettier: Does Prettier support configuration customization?

Prettier is intentionally opinionated with limited configuration options to enforce consistency. You can create a .prettierrc file for basic customization, but Prettier does not support extensive rule customization like ESLint.

Source
Thought Machine: Does the licence fee represent the total cost?

No. Implementation, system integration, parallel running and cloud infrastructure typically cost more than the licence over the programme.

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