FRAGMENT
       
          
Adjust back
Balance back
Due back
Available back
Booking back
Headphones back
Adjust back
Balance back
Due back
Available back
Booking back
Headphones back
Adjust back
Balance back
Due back
Available back
Booking back
Headphones back
Adjust front
Balance front
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Available front
Booking front
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Adjust front
Balance front
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FRAGMENT is a ledger API. Fintechs use FRAGMENT to ship financial features faster with less risk, cost, and hassle.
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Deployed in minutes
1
2
3
Design
FRAGMENT
1Schema
2Ledger
3Reports
Description
Account
Amount
Balanced✓
FRAGMENT
1Schema
2Ledger
3Reports
wallet-instant-payout
Typescript
Go
Ruby
Python
_
_
/
FRAGMENT
1Schema
2Ledger
3Reports
wallet-instant-payout
Fin
One tool used by every team. Model any funds flow, turn it into code, and never get another balance wrong.
Reconciliation, solved
Acme
Available
345.99 USD
TransactionAmount
390
345.99 USD
Assets/…/Stripe-Payin
Account
Stripe-Payin
Balance0.00 USD
TransactionLinkedAmount
Txn_390
!345.99 USD
FRAGMENT tracks every transaction across all your systems, so payments always reconcile and balances are never wrong.
Accounting for engineers
Booking back
Booking front
Accounts
Balances, templates, linked nested etc.
Entries
Immutable but reversible double-entry, the goods.
Accounts are balances you can name. Entries update those and conform to the rules of accounting. Compose them as you wish to deploy the database for your money.
Features
  1. A
    Configurable schemas
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  2. B
    Entry conditions
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  3. C
    Strong consistency
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  4. D
    Aggregated balances
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  5. E
    Historical balances
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  6. F
    Balance change queries
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  7. G
    Timezone offsets
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  8. H
    Ledger entry groups
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  9. I
    Multi-currency accounts
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  10. J
    Custom currencies
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  11. K
    Report generation
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  12. L
    Tags
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  13. M
    Idempotency
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  14. N
    Schema-based SDKs
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  15. O
    Schema migrations
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  16. P
    AWS regional deployments
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  17. Q
    Reconciliation
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  18. R
    Payments integration
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  19. S
    S3 export
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Case studies

“FRAGMENT's the system of record for all our historical balances. It's one of the two or three core systems in our stack.”

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“The thing that would’ve taken a year or two at Square took a month at Basic Capital. Engineering velocity is a huge unlock that’s directly attributable to FRAGMENT.”

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“We throw the kitchen sink at FRAGMENT. They solve all the tedious, table stakes problems so we can focus on the 1% that differentiates us. It functions like magic.”

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Updates
Blog
News
Changelog
No one builds their own database. Why build one for your money?
©
 FRAGMENT  
2026
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