The database for money.
FRAGMENT is a ledger API for engineers that move money. Model any funds flow, turn it into code, and never get another balance wrong.
FRAGMENT tracks every transaction across all your systems, so payments always reconcile and balances are never wrong.
The control plane for your financial code.
Declarative schemas
Model your product as a double entry chart of accounts._
Typesafe SDK
Generate an SDK from your schema, so config and code never drift.fragment.PostMakeDriverPayout(payout_amount: 1000, driver_id: abcd1234)
Entry conditions
Authorize transactions directly from the ledger.+200
assets/cash
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Features
- AConfigurable schemas→
- BEntry conditions→
- CStrong consistency→
- DAggregated balances→
- EHistorical balances→
- FBalance change queries→
- GLedger entry groups→
- HConsistent balances→
- IPeriod balances→
- JMulti-currency accounts→
- KCustom currencies→
- LReport generation→
- MEntry tags→
- NLine tags→
- OReversible entries→
- PRepeated lines→
- QLinked accounts→
- RNet amounts→
- SFiltered queries→
- TCursor pagination→
- UIdempotency→
- VSchema-based SDKs→
- WSchema migrations→
- XAWS regional deployments→
- YReconciliation→
- ZS3 export→
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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FRAGMENT 2026
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