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Blnk Core

Get your ledger running in minutes

Save engineering labour. Blnk Core comes ready with the tools you need. Set it up fast and focus on your product, not the infrastructure.
Launch Blnk in 3 steps. 1 | Download Blnk. 2 | Docker compose up. 3 | Start using Blnk as your ledger.
Cut your launch time in half.
Skip months of setup and dive right into your product. Blnk takes care of the rest.
Resilient by design
Handle high transaction volumes with correctness and consistency from day one.
Secure
Core runs in your infrastructure, so you stay in control of your data.
Immutable and reliable
Own a ledger you trust. Every entry is tamper-proof, creating an audit trail without any extra work.
Balances icon
Manage balances across multiple currencies
Multi-currency support
out-of-the-box

Track fiat, crypto or custom currencies side by side without losing a cent.

Multi-currency support out of the box
Balance monitoring

Define thresholds and get alerted when balances cross set limits.

Balance monitors
Organize your balances into ledgers

Group balances into ledgers for cleaner structure, reporting, and reconciliation.

Group balances into ledgers
Balance snapshots

Capture point-in-time states of balances for reporting, audits, or analytics.

Balance snapshots
Historical balances

Retrieve balances at a particular historical point in time in your ledger.

Historical balances
Transactions icon
Building blocks to power any transaction workflow
Track transactions through their entire lifecycle

See every state change, from applied, rejected, inflight, or void.

Transaction statues
Record your transactions to the smallest cent

Capture every money movement with precision, down to fractions of a unit.

Precision
Apply overdrafts to transactions

Allow balances to go negative safely, with clear overdraft limits.

Apply overdrafts
Inflight transactions

Hold transactions and commit only after other events clear or decline.

Blnk Core asset
Backdated transactions

Insert transactions into the past to correct balances without breaking accuracy.

Backdated transaction
Bulk transactions

Handle large batches of transactions in one go, with the option to enforce all-or-nothing commits.

Bulk transaction
Reconciliation icon
Reconcile external records with your ledger
Set matching rules

Define how records should be matched — by currency, amounts, dates, reference, or description.

Set matching rules
Reconciliation strategies

Choose a strategy that fits your operational workflow — one to one, one to many, or many to one.

Reconciliation strategy
Batch reconciliation

Process large sets of external records (bank statements, provider records, etc.) at once and match them against your ledger.

Bulk reconciliation
Instant reconciliation

Automatically reconcile transactions as they occur.

Instant reconciliation
Identities icon
Your users and their financial activities in one place
Manage individuals & organizations

Create and manage user or business profiles.

Create identity
Link to balances

Connect identities directly to balances and transactions for a complete financial picture.

Link balances
PII tokenization

Protect sensitive data by tokenizing personally identifiable information (PII) in your ledger.

PII tokenization
Seamless integration with your systems
Search API

Retrieve ledgers, balances, transactions, and identities in your Core for your application.

Search API
Hooks

Register and manage webhooks for transactions in your ledger.

Hooks
Flexible metadata handling

Add or update metadata on any record and make it instantly searchable.

Metadata
Blnk Cloud icon
Insights & monitoring built for your Core
Access monitoring, analytics, and controls on top of your Core. No extra work required.
See Cloud features
Cloud monitoring
See how developers feel about Core
Join Discord community
Senior Software Engineer
at Yousend.

Integration was seamless, and the fact that it's open-source adds flexibility. On top of that, Blnk is incredibly fast.

Kevin Dave
@kevindavee.

Thanks for the amazing product. I'm planning to migrate my whole accounting system to Blnk Finance.

Akashi
@akashi1377.

I'm loving the solution. It really helped my team come a long way and saved us so much time.

Sam
@brave_mango_06137.

We've been using the ledger on production and it's been working great! Thank you for your support.

CTO and founder
at Seven.

With Blnk, I didn’t need anybody. As long as we could read the docs, setup was very easy.

Frequently
asked questions
Have other questions, send us an email at support@blnkfinance.com
Is Core really free to use?
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Yes. Core is open-source under the Apache 2.0 license. You can download, use, inspect, and extend it without any license fees or hidden commitments.
Can Core handle multiple currencies?
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Yes. Core is built with multi-currency support. You can maintain balances, perform conversions, and reconcile across different currencies.
Can I connect Core to other systems?
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Yes. Core exposes APIs and supports webhooks, making it easy to integrate with payment processors, banking systems, or your custom back-office workflows.
How do I get started with Core?
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You can install Core by following the quickstart guide in the docs. Read here.
Do you offer integration support for Core?
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Yes, we provide Pro Support for teams that want guided help. With Pro Support, our team assists with ledger design, integration questions, and troubleshooting as you set up and scale Core in production. Reach out to get started.
I have more questions. How do I get answers?
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