______________________
_________
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____________ _________
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Entries
☰
fund-operating
Parameter
Value
amount
50000
new-invoice
Parameter
Value
user_id
alice
merchant_id
m_abc
fee_amount
300
gross_amount
10000
new-invoice
Parameter
Value
user_id
alice
merchant_id
m_def
fee_amount
600
gross_amount
20000
charge-user
Parameter
Value
user_id
alice
Amount
30000
payout-merchant
Parameter
Value
merchant_id
m_abc
payout-merchant
Parameter
Value
merchant_id
m_def
record-bank-fees
Parameter
Value
Amount
100
Accounts
Assets
0
1
2
3
4
5
6
7
8
9
├╴
Bank
0
1
2
3
4
5
6
7
8
9
└╴
Receivables
0
1
2
3
4
5
6
7
8
9
└╴
Users
0
1
2
3
4
5
6
7
8
9
└╴
alice
0
1
2
3
4
5
6
7
8
9
Liabilities
0
1
2
3
4
5
6
7
8
9
├╴
Equity
0
1
2
3
4
5
6
7
8
9
└╴
Payables
0
1
2
3
4
5
6
7
8
9
└╴
Merchants
0
1
2
3
4
5
6
7
8
9
├╴
m_abc
0
1
2
3
4
5
6
7
8
9
└╴
m_def
0
1
2
3
4
5
6
7
8
9
Income
0
1
2
3
4
5
6
7
8
9
└╴
Invoice-fees
0
1
2
3
4
5
6
7
8
9
Expense
0
1
2
3
4
5
6
7
8
9
└╴
Bank-fees
0
1
2
3
4
5
6
7
8
9
A ledger for engineers
Description
Account
Amount
Balanced✓
wallet-instant-payout.ts
_
_
/
We make ledgers accessible by turning them into code. So you can manage balances that traditional financial systems can't. And build products that exchange value in ways never before possible.
Balances, solvedBalanceTransactionsFRAGMENT tracks every transaction across all your systems, so payments always reconcile and balances are never wrong.
Product
Available
0
1
2
3
4
5
6
7
8
9
FRAGMENT
/AccountsEntries
Bank
0
1
2
3
4
5
6
7
8
9
Available
0
1
2
3
4
5
6
7
8
9
Deposit
Deposit
Bank
Bank****3728
0
1
2
3
4
5
6
7
8
9
Txn_238dhj
Txn_172ykz
Enterprise-gradeBuilding a real-time ledger is hard. It takes forever, requires lots of engineers, and you won't know it's wrong until it's too late. FRAGMENT provides all the power of double-entry with none of the risk or hassle.
Declarative schemas
Turn your funds flow into code and embed it in your product._
Multi-currencyUSDEURJPY
One ledger, every currency.Account
FX-Exposure
Balances
0
1
2
3
4
5
6
7
8
9
0
1
2
3
4
5
6
7
8
9
0
1
2
3
4
5
6
7
8
9
Integrations
Sync transactions from your financial systems with entries in your ledger.Add+
Stripe
Unit
Increase
Custom
Features
- AConfigurable schemas→
- BEntry conditions→
- CStrong consistency→
- DAggregated balances→
- EHistorical balances→
- FBalance change queries→
- GTimezone offsets→
- HLedger entry groups→
- IMulti-currency accounts→
- JCustom currencies→
- KReport generation→
- LTags→
- MIdempotency→
- NSchema-based SDKs→
- OSchema migrations→
- PAWS regional deployments→
- QReconciliation→
- RPayments integration→
- SS3 export→
Customers
“FRAGMENT's the system of record for all our historical balances. It's one of the two or three core systems in our stack.”
“For us, the real advantage of FRAGMENT is that it changes what we can build. We're designing lots of new financial products and owning our ledger is key to all of them.”
“When we re-built Nala as a payments API, we needed a robust ledger. FRAGMENT’s schema system made double-entry intuitive and helped us launch faster.”
Performance
Unlike relational databases, FRAGMENT fans out writes and aggregates reads so your requests are never bottlenecked.
Use CasesWith FRAGMENT, building financial products is like constructing Lego. What once took months can now be assembled in a few clicks.
Updates
Blog
News
No one builds their own database. Why build one for your money?
©
FRAGMENT 2025
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