Quant research & backtesting · Open-source community
QuantLib
Open-source C++ library for quantitative finance, providing pricing, curve-building and risk models used across many pricing tools.
QuantLib is a free C++ library for quantitative finance that provides building blocks for pricing derivatives, constructing yield and volatility curves, modeling interest rate term structures, and computing risk sensitivities across equity, fixed income, FX and credit instruments. It is not a backtesting or trading platform itself but a pricing and modeling toolkit that many commercial and in-house systems embed or wrap, with official bindings for Python, Java, C# and other languages via SWIG. Because it is a library rather than an application, using it requires programming; there is no GUI, dashboard or hosted version, and all deployment is self-hosted inside whatever application embeds it.
At a glance
| Vendor | Open-source community |
|---|---|
| Pricing model | Open source + paid options |
| Free tier | Yes |
| Deployment | Self-hosted |
| Open source | Yes (BSD-3-Clause) |
| Best for | Quant developers building or embedding pricing and risk models inside their own applications. |
Pricing
Free, open-source library with no paid tier or hosted offering.
Pricing has not been verified yet — see the vendor's site.
Features
- Derivatives pricing models (options, swaps, bonds, credit)
- Yield curve and volatility surface construction
- Interest rate term structure modeling
- Risk sensitivity (Greeks) calculation
- Day-count, calendar and schedule utilities for fixed income
- Python, Java, C# and other language bindings via SWIG
Integrations
Profile last reviewed September 21, 2026