Public Grid
How Public Grid went from bare Postgres to a production-grade ledger
Got asked to move money? Don't build it from scratch.
Blnk helps developers confidently ship their financial products without compromising accuracy or compliance.
Blnk gives you a production-grade, open-source ledger that fits your workflow and keeps balances correct.
Used in production by real teams:
Build any transaction workflow on top of an open-source, immutable ledger.
Start integrating immediately with REST APIs, SDKs, and tools that lets you build with the languages you already use.
Production-ready
Immutable by design
Scales with you as you grow to millions/billions of transactions
Great developer experience and tooling
Multi-currency balances
Accurately track accounts and wallets across multiple currencies in your application
Transactions
Implement transaction workflows like split transactions, bulk, two-phase commits, and more.
Reconciliation
Easily compare and reconcile your external sources with your ledger data in one place.
Identities
Create and link identities to their full transaction history within your application.
Integration was seamless, and the fact that it's open-source adds flexibility. On top of that, Blnk is incredibly fast, making it a solid choice for high-performance financial systems.
Map out your money movement with confidence
Start integrating immediately with REST APIs, SDKs, and tools that lets you build with the languages you already use.
Map your flow of funds before you write a line of code.
Simulate how money moves across balances, ledgers, providers, and edge cases.
Share one clear source of truth your product, finance, and engineering teams can build from.
Draw
Sketch and design how you expect funds to move in your app on an easy-to-use canvas
Simulate
Visualize how every money movement impacts balances across your system.
Collaborate
Save and share flow designs with your team for review and implementation.
The level of attention and dedication was exceptional. The support we got has been outstanding, and we couldn't ask for better partners.
Manage and operate your ledger back-office with your team members in one place.
Start integrating immediately with REST APIs, SDKs, and tools that lets you build with the languages you already use.
Improve your operational efficiency by 10x
Remove bottlenecks and easily collaborate with other non-technical teams
Manage multiple environments (dev, staging, production) in one place
Use audit logs to see every activity performed on your ledger.
Back-office console
Easily manage back-office ledger operations (create, edit, approve, void, etc.) from one place.
Access-control & collaboration
Securely invite and collaborate with other team members who need access to ledger data.
Manage data in production
Rely on Blnk for hosting or maintain access and control over your ledger data in production.
Insights & monitoring
Explore and understand your ledger data with custom insights, filters, and views.
We had the licenses and the infrastructure, but without a financial core, we couldn’t move forward. Blnk gave us the foundation to build on.
Monitor and instantly flag transactions happening in your ledger
Start integrating immediately with REST APIs, SDKs, and tools that lets you build with the languages you already use.
Monitor money movement with rules your team can actually understand.
Define simple, aggregate, or time-based checks across your ledger transactions.
Catch risky ledger activity before it grows.
Simple script
Create simple to advanced monitoring rules with simple, human-readable Watch scripts.
Plug and play
Easily plug into Blnk or your existing ledger system to start detecting anomalies.
Git native
Manage your rules in GitHub with full version control and sync them directly to Watch for execution.
Open-source
Free to use and download, with full access to the source so you can run and modify it as needed.
Blnk Starter
Create a Blnk Cloud workspace and start building with a production-ready ledger in 5 minutes.
Start integrating immediately with REST APIs, SDKs, and tools that lets you build with the languages you already use.
Start a sandbox in seconds
Run back-office operations
Managed hosting for your Core
Up to 5,000 TPM and 5 GB of storage
Connect custom apps to your workspace
Full access to the source code
Access to dedicated Pro Support
Blnk Dedicated
Deploy the full Blnk stack in a secure, private environment you control. Comes with a production license for full use.
Start integrating immediately with REST APIs, SDKs, and tools that lets you build with the languages you already use.
Deploy on your own Cloud or our private Cloud
Multi-region deployment support
Higher throughput (TPM) and availability
Whitelabel the back-office dashboard
Enjoy custom enterprise features
Access rule-based transaction monitoring
Security updates and priority upgrades
Dedicated solutions engineer
24/7 priority support for crucial incidents
Frequently
asked questions
Have other questions, send us an email at support@blnkfinance.com or contact us
Send us a message
What is Blnk Core?
Blnk Core is an open-source toolkit that gives developers everything they need to build ledgers, automate reconciliation, and manage identities with ease.
How does Blnk's ledger database work?
Blnk’s ledger is built on a double-entry accounting model designed for precision, scalability, and traceability. Each transaction is recorded as a balanced entry between a source and destination, ensuring data integrity at all times.
How does Blnk ensure double-entry consistency?
Blnk enforces double entry by requiring every transaction to have both a source and a destination. This means each transaction always involves two parties, keeping your records balanced.
Can Blnk Core handle multi-currency balances?
Yes. Blnk Core supports multi-currency by letting you define balances in different currencies and track them independently within the same ledger.
Can I model my own transaction workflows?
Yes, you can. Define how money moves in your system and implement them in Blnk via API calls. Blnk handles all of the ledger logic under the hood.
What's the performance like at scale (high-volume transactions)?
Blnk is designed to handle high volume transactions and workflows. Read our approach here.
Where does Blnk Core store my data?
Blnk core uses Postgres as it's storage engine. You get to bring your own Postgres database giving you 100% control on your data.
How do I connect Blnk Cloud to Blnk Core for insights and monitoring?
You connect your running Core instance to Blnk Cloud using our secure Query Agent. Learn how to connect your Core here.
How do I integrate Blnk into my existing stack?
Blnk is API-first. Run the open-source Core locally or in your infra, then connect through REST APIs or SDKs.
Can I extend Blnk with my own logic?
Yes. Everything in Blnk is driven by APIs. You can wrap workflows in your own services, extend them with business rules, or connect them to any provider.
Can I migrate my current ledger to Blnk Core?
Yes, you can. You can start by running Blnk alongside your current system. Import balances, replay historical transactions if needed, and phase over workflows step by step. Learn more about data migration here.
I have more questions. How do I get answers?
Send us a message at hello@blnkfinance.com or reach out to the team here.
