---
title: "Is the ETL free?"
# Force it to the top of the list
weight: 1
# Disable the Table of Contents entirely for this page
toc: false
---

The ETL is free for you or your company to use, including in commercial applications.  

*However, it is not free for me to create or maintain.*

## Why Open Source Needs Support

Development, support, documentation, testing, and hosting all require time and resources.  
*Currently, this work is carried entirely by me, usually without compensation.*

As the ETL has grown in functionality and popularity, so has the workload. In some weeks, maintaining the project takes over 30 hours. Without financial support, this is difficult to sustain alongside paid work and personal obligations.

## Why Sponsor the Embedded Template Library (ETL)?

The Embedded Template Library (ETL) is a modern, high-performance C++ library designed specifically for embedded systems. It provides STL-like functionality for environments where efficiency, reliability, and low overhead are essential.

The ETL is used by hobbyists, engineers, and international companies developing commercial embedded products. Yet it is maintained by a single developer in their spare time.

If the ETL has helped your project or become part of your development toolset, please consider supporting its continued growth.

## Why Sponsorship Matters

- **Sustainability**  
Ongoing support helps keep the library maintained and up to date.
- **Reliability**  
Sponsorship allows for regular testing, bug fixes, and improvements.
- **Responsibility**  
Supporting the tools you depend on strengthens the software ecosystem.
- **Recognition**  
Sponsors can be publicly acknowledged if desired.

Whether you use the ETL in personal projects or commercial products, your support helps keep it available and improving.

The ETL began as a way to share years of embedded development experience. Since 2014, it has grown into a feature-rich and widely used library.  
*But it is still powered by one developer, without corporate funding.*

If you or your company benefit from the ETL, please consider becoming a sponsor. Even small contributions help cover hosting, tools, and time spent supporting the library and its users.

[Why CFOs should care about Open Source software](https://opensourcepledge.com/blog/CFOs-care-about-OSS/)

## How to sponsor

There are two ways that you can help me with the maintenance and further development of the library.

**Through the GitHub donations link.**  
[Github sponsors](https://github.com/sponsors/ETLCPP)

---

**By direct bank transfer**  
  Donations are accepted in many world currencies.  
  AED, AUD, BGN, CAD, CHF, CLP, COP, CZK, DKK, EGP, EUR, GBP, HKD, HUF, ILS, INR, ISK, JPY, KRW, 
  KZT, MAD, MXN, NOK, NZD, PHP, PLN, QAR, RON, RSD, SAR, SEK, SGD, THB, TRY, USD, ZAR 

  I can supply invoices for companies that require one for accounting and tax purposes. 

**UK**  
Beneficiary   John Wellbelove  
Account       12655643  
Sort code     04-00-75

**Swift (International)** 
Beneficiary  John Wellbelove  
IBAN         GB17 REVO 0099 7000 7513 26  
BIC          REVOGB21  

Many thanks for any support you can give to keep this project actively supported,  
*John Wellbelove*
