Awesome Fintech

A curated collection of open source fintech libraries and resources. This is not a complete list, so please feel free to submit a pull request adding a project with a short description! Projects must demonstrate real-world traction and usage, with a meaningful commit history (no weekend "vibe-coded" projects). Actively maintained projects with great documentation and established user bases are preferred. Commercial projects can include a Github link to their source-available code for inclusion.

Table of contents

• Accounting & Invoicing
• Analytics & Visualization
• Banking & Ledger
• Calculators & Tax
• Compliance & Sanctions
• Cryptocurrency & Blockchain
• Currency Handling
• Data & Market Intelligence
• Education & Resources
• Forms & UI Components
• Integrations & Payments
• ISO8583
• Personal Finance
• Terminals & Dashboards

Accounting & Invoicing

• Akaunting – online accounting software designed for small businesses and freelancers
• BoxBilling – billing, client, and order management software designed to be easy-to-use for both clients and sellers
• Crater – web and mobile app that helps freelancers and small businesses track expenses/payments and create professional invoices and estimates
• Invoice Ninja – invoice clients, facilitate payments, track time/tasks, handle expenses, and more (built with Laravel and Flutter)
• Kill Bill – an SaaS-like subscription management and billing solution with real-time analytics and financial reports
• Manta – flexible invoicing desktop app with diverse and customizable templates

Analytics & Visualization

• amCharts – a simple and flexible drop-in data visualization solution
• DXCharts Lite – a modern solution for visualizing financial data with a wide variety of chart types. Originally developed as part of large tradings applications used by millions of users, DXcharts Lite has matured into an independent product
• FinTA – a technical analysis of financial indicators implemented in Pandas
• Highcharts – a Javascript charting framework used to create complex financial data dashboards
• Lightweight Charts – display financial data as an interactive chart on your web page without affecting loading speed and performance
• perspective – an interactive analytics and data visualization component especially well-suited for large and/or streaming datasets
• pyfolio – portfolio and risk analytics in Python
• react-financial-charts – charts dedicated to finance with multiple types, interactive indicators, overlays, and drawing objects
• Vizzu – a library for animated data visualizations and data stories

Banking & Ledger

• ach – a reader, writer, and validator for Automated Clearing House (ACH) files
• Apache Fineract – core banking solution for financial institutions offering services to the world's two billion underbanked and unbanked
• rtp-20022 – a project offering Go structures which can read and write XML encoded ISO 20022 messages for RTP payments
• Sequence – immutable, scalable, and easy to use ledger service

Calculators & Tax

• Accrue.js – a loan and interest calculation plugin for jQuery
• finance – a library for financial calculations in Ruby
• go-finance – Go library containing a collection of financial functions for time value of money (annuities), cash flow, interest rate conversions, bonds, and depreciation calculations
• node-sales-tax – international sales tax calculator for Node
• OpenAccountants – Provides a multi-jurisdiction tax classification system with 371 skills across 134 countries for VAT/GST, income tax, and social contributions (Python)
• py1040 – a U.S. personal income tax calculator
• sip-calculator – a JavaScript library for Systematic Investment Plan (SIP) calculations with support for compound interest, goal-based planning, and step-up SIPs

Compliance & Sanctions

• fincen – A Go library for reading and writing Fincen BSA forms. It is capable of generating, validating, and batching submissions.
• IBANforge – REST API and MCP server for IBAN validation (75+ countries, mod-97 checksum) and BIC/SWIFT lookup (121K+ entries from GLEIF). x402 micropayments, self-hostable via Docker.
• OpenSanctions – an open database of international sanctions data, persons of interest, and politically exposed persons
• stripe-mcps – Cryptographic security layer for Stripe agent payments. Trust verification + sanctions screening before PaymentIntent execution.
• Strale – quality-scored compliance APIs for AI agents: sanctions screening, PEP checks, company lookups, and KYB verification
• Watchman – offers search functions over numerous trade sanction lists from the United States

Cryptocurrency & Blockchain

• Coinnect – an open-source money transfer routing engine that finds the cheapest multi-hop paths across fiat, crypto, and P2P networks using Dijkstra over 29K+ live edges
• CryptoList – curated collection of blockchain and cryptocurrency resources
• Hyperledger Fabric – distributed ledger framework for developing solutions and applications
• XChange – Java library that provides a simple API for interacting with 60+ cryptocurrency exchanges, delivering a consistent interface for trading and accessing market data

Currency Handling

• accounting – money and currency formatting for Golang
• accounting.js – a tiny JavaScript library for number, money, and currency parsing/formatting
• currency.js – a lightweight library for handling currency values and built to work around floating point issues in JavaScript
• Dinero.js – an immutable library and API to create, calculate, and format monetary values
• Open Exchange Rates – a real-time JSON API that provides exchange rates (forex/fx rates) for 150+ currencies, relative to USD

Data & Market Intelligence

• coinpaprika-api-python-client – Python client for the CoinPaprika API providing crypto market data for 12,000+ coins and 350+ exchanges with tickers, OHLCV, and historical prices
• dexpaprika-sdk-python – Python SDK for the DexPaprika API providing DEX analytics across 34 blockchains with pool data, token metadata, OHLCV charts, and real-time streaming
• edgartools – SEC EDGAR data for quant strategies — fundamentals, institutional holdings (13F), insider transactions, and corporate events (8-K). Includes MCP server for AI workflows
• fdnpy – Access real-time and historical stock data, financial statements, ratios, insider trades, with global coverage of equities, ETFs, indices, derivatives, OTC and crypto.
• finance-go – a financial markets data library implemented in Go
• fredapi – Python API for FRED (Federal Reserve Economic Data) and ALFRED (Archival FRED)
• fxmacrodata – Python SDK for macroeconomic indicators, central bank rates, FX spot rates, and release calendars covering 18+ currencies. Includes sync and async clients.
• GoFinance – Financial information retrieval and munging written in Go
• google-finance – Python module to get stock data from Google Finance
• Helium MCP – Live market data with AI-powered analysis and ML options pricing, available as an MCP server for AI assistants. (TypeScript)
• Pharos – Open-source stablecoin analytics dashboard tracking peg stress, DEX liquidity, safety ratings, blacklist and freeze events, mint/burn flows, chain health, and failed stablecoins.
• Indicator Go – Go library delivering a rich set of technical analysis indicators, customizable strategies, and a powerful backtesting framework.
• Indicator TS – TypeScript library delivering a rich set of technical analysis indicators, customizable strategies, and a powerful backtesting framework.
• JCStockGraph – display historical price graphs for any stock in your iOS app
• Oracle3 – Autonomous prediction-market trading agent for Kalshi, Polymarket, and Solana featuring a Wang-transform pricing engine, arbitrage strategies, Kelly sizing, and on-chain execution via Jito bundles (Python)
• TuShare – a utility for crawling historical data of China stocks
• yahoo-finance – Python module to get stock data from Yahoo Finance

Education & Resources

• deep-finance – datasets, papers, and books on AI and finance
• Fintech dictionary – simple definitions of fintech terms and acronyms
• Learn Go with tests – resource for learning test-driven development with Go

Forms & UI Components

• Card – a better credit card form in one line of code
• Payment – a jQuery-free general purpose library for building credit card forms, validating inputs, and formatting numbers
• PaymentFont – a sleek webfont featuring popular payment methods
• payment-webfont – an SVG webfont full of payment system and ecommerce icons
• Remix Icon – set of neutral-style system symbols, including but not limited to payment method icons, for designers and developers

Integrations & Payments

• API Factory x402 – 100 x402 micropayment APIs for AI agents. USDC on Base.
• awesome-x402 – a curated list of resources for the x402 HTTP 402 payment protocol, enabling programmatic machine-to-machine payments using USDC over standard HTTP
• Gringotts – a simple and unified API to access dozens of different payment gateways with very different APIs, response schemas, documentation, and jargon
• hyperswitch.io – is a Financial Switch that connects you with multiple payment processors and route traffic effortlessly with a single API integration
• Omnipay – payment processing library for PHP
• paypal-checkout-components – JavaScript integration for PayPal Button and PayPal Checkout
• react-native-payments – for integrating payments like Apple Pay and Google Pay into your React Native app
• Recurly.js – create subscriptions, process one-time transactions, and update customer billing information
• upi-intent – Framework-agnostic JS/TS library for generating UPI app-specific deep links with Android and iOS fallbacks.

ISO8583

• iso-8583-socket-queue – Node.js powered ISO8583 gateway implementation for banking/fintech POS systems communication
• JReactive-8583 – ISO8583 client and server built on top of excellent Netty asynchronous messaging framework with the help of j8583 for encoding/decoding
• moov-io/iso8583 – ISO 8583 message reader and writer in Go
• moov-io/iso8583-connection – Connection package matching iso8583 requests and replies

Personal Finance

• Budget – a web application that helps you keep track of your finances by organizing and visualizing transactions
• Firefly III – a self-hosted manager for personal finances to track expenses and income
• Ghostfolio – a web-based wealth management application to keep track of your financial assets like stocks, ETFs or cryptocurrencies and make solid, data-driven investment decisions
• Mintable – automate personal finances without ads and data collection
• OnTrack – a simple, self-hosted budgeting app to understand and control spending without giving banking/financial info to a third party

Terminals & Dashboards

• Fincept Terminal – Open-source Bloomberg alternative: AI-driven research, multi-asset analytics, portfolio tools, and real-time market data.
• FinSight AI – Multi-agent financial research platform with 7 specialized AI agents, professional dashboard, hybrid RAG, smart charts, and autonomous task execution, built on LangGraph.