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blnkfinance —

Asked to move money?Don't build it from scratch

Build with an open-source, double-entry ledger designed for managing financial products in production.

Create account Book a call 
const response = await blnk.Transactions.create({  precise_amount: 123012,  precision: 100,  currency: 'USD',  source: '@WorldUSD_ACH',  destination: 'bln_omar-bal-001',  reference: 'ref_dep_01',  description: 'Wallet deposit',  meta_data: {    rail: 'ach',    origin: 'payroll'  },  skip_queue: true,});

Wallet
Trusted by developers in production:
  • Yousend
  • Public Grid
  • Busha
  • Fast Track
  • Bitnomi

Blnk Core

Build and ship transaction workflows in days

Model any transaction workflow on an immutable, double-entry ledger, from simple transfers to multi-step flows, and get to production fast.

Explore the docs

Transaction details

Transaction workflows

const response = await blnk.Transactions.create({  precise_amount: 125034,  precision: 100,  currency: 'USD',  source: '@WorldUSD',  destination: '@MyBalance',  reference: 'ref_f482a1b3-6c2d-4e89-a17b-3d5e8f2a1c94',  description: 'Customer payment',  skip_queue: true,});

Blnk Cloud

Deploy and operate your ledger in production

Skip the manual infrastructure work. Get a production ledger with compliance, uptime SLAs, backups, and security built in for your financial product.

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Blnk Tiny

An embedded transaction engine built for financial products

Tiny gives your product its own dedicated engine for transactions and balances. Run it embedded or standalone, with durable local storage, no external database stack, and millions of TPMs on modest hardware.

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Lightweight by design

Tiny keeps the transaction path small, delivering high write throughput on modest commodity hardware without a database cluster.

A single binary with no infra stack

Tiny ships as a single binary with storage, transactions, recovery, and indexing built in. Run it embedded or standalone, with no Postgres or Redis required.

Durable at the commit boundary

Transactions are WAL-backed and acknowledged only after reaching the durability boundary. Checksums and crash recovery protect committed state.

Correct financial state

Tiny controls how transactions become balance changes. Writes are ordered, duplicates are rejected, records are immutable, and every update follows the same deterministic commit path.

Stories

Hundreds of engineers sleep well at night with Blnk powering their product.

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Customer testimonials

  • The support from the team was incredible. They not only guided us through their product but also helped us implement it within our system. — Sajith Caldera, CEO, Bitnomi
  • We are very convinced that you are the right team. We believe you can shorten our development time from a year to four months. — Mario León, CEO, Morna Tech
  • Given the fact that Blnk is open-source, with support for a managed Cloud dashboard, you have solved 70% of our engineering problems. — Mohammed Al-Ameen, Head of Engineering, Digitvant
  • Blnk is the best solution that I have found until now. The other choices are a bit too complex to use and do too much. Blnk does the job that a ledger needs to do without complexity. — Antonio, CTO, BR Tokens
  • I’ve done a bit of research with some other products personally… and so far, we both think that yours stood out ahead of the other open-source competition. — Fahad Khawaja, Senior Engineer, Oraan
  • We know we won’t get everything right the first time. But with Blnk, we are confident that we can keep iterating until we do. — Patrick McEvoy, CTO, Oraan
  • The personal touch is what makes you better/different from your competitors. — Prerak Motwany, Co-founder, Bitnomi
  • I’m not very good with accounting, but the docs were easy to understand and helped us get started right away. — Kevis Rondon, CTO, Morna Tech
  • 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. — Toni Akinmolayan, Senior Engineer, Yousend
  • It’s the best and most comprehensive solution that I have found. — Awale Jamac, Co-founder, Onbilia

Security

Open-source ledger infrastructure you can trust

Blnk is ISO/IEC 27001-certified and GDPR-compliant. Built with security features and best practices auditors ask for.

How we handle security

ISO/IEC 27001 and GDPR

Blnk’s ISMS is certified to ISO/IEC 27001. Personal data is processed under GDPR.

Encryption in transit and at rest

Sensitive data at rest is encrypted with AES-256-GCM. Data in transit uses TLS 1.2 or higher.

Role-based access control

Give every team member the access they need, and nothing more. Granular roles keep sensitive ledger operations restricted while making audits and reviews straightforward.

Built for security reviews

We support vendor and security reviews with clear policies around access control, information security, incident response, and business continuity.

See the latest from Blnk Finance

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