Open source

Open Source, functional, modular and friendly Scala libraries.


Become a financial contributor.

Financial Contributions

Recurring contribution


Become a backer for $5.00 per month and support us

Starts at$5 USD / month

Latest activity by

+ 18

Silver Sponsor

Have your logo listed as Silver Sponsor on our website

Starts at$180 USD / month

Latest activity by


Gold Sponsor

Have your logo listed as Gold Sponsor on our website.

Starts at$420 USD / month


Platinum Sposor

Have your logo listed as Platinum Sponsor on our website.

Starts at$950 USD / month

Custom contribution


Make a custom one-time or recurring contribution.

Latest activity by

+ 40

Top financial contributors


Pere Villega

$4,800 USD since Nov 2019

Chris Hodapp

$3,000 USD since Dec 2019


$2,912.3 USD since Dec 2019

David Gregory

$450 USD since Dec 2019

Ryan Williams

$340 USD since Nov 2019

Robert Cheetham

$325 USD since Apr 2021

Olli Helenius

$240 USD since Nov 2019

Luis Miguel Mejía-Suárez

$240 USD since Nov 2019

Peter Perhac

$235 USD since Nov 2019

Bogdan Roman

$230 USD since Nov 2019



$11,791.47 USD since Sep 2020

Adjust GmbH

$2,700 USD since Aug 2020

commercetools GmbH

$500 USD since Apr 2021


$360 USD since Aug 2021


$175 USD since Jan 2020

The Guardian

$100 USD since Mar 2021

Typelevel is all of us

Our contributors 47

Thank you for supporting Typelevel.

Kailuo Wang

Core Contributor


$11,791 USD

Pere Villega

Silver Sponsor

$4,800 USD

As a developer I benefit so much from the Typel...

Chris Hodapp

Silver Sponsor

$3,000 USD

Donorbox (car...

$2,912 USD

Adjust GmbH

Silver Sponsor

$2,700 USD

David Gregory


$450 USD


Silver Sponsor

$360 USD

Ryan Williams


$340 USD


Transparent and open finances.

Today’s balance

$10,260.34 USD

Total raised

$26,140.03 USD

Total disbursed

$15,879.69 USD

Estimated annual budget

$6,660.60 USD


Thank you for visiting the Typelevel sustainability program.
The ultimate goal for this program is to provide ways for the user community to ensure the long-term sustainability of the development and maintenance of some Typelevel libraries.

Based on the Cats ecosystem community survey 2018 results, as well as feedback from potential donors, we adopted the following principles for the program:


* Paid maintainers focus on supporting the community contributors. In another sentence, paid maintainers’ first task is to maintain the community-driven development.
More detailed responsibilities are listed below.
* Main obligations to sponsors (individual or corporate) are limited to 
  - The existing license remains unchanged.
  - Timely security patches and mission-critical bug fixes.
  - Financial contributions will NOT grant contributors extra influence over the development.
  - Financial contributors can influence how their contribution is distributed among projects.
* The program is governed by an independent committee.
* As part of our community, sponsors hold values compatible with the Scala Code of Conduct.

Responsibilities for paid maintainers 

Based on these principles, we established the following three main goals and relevant tasks for paid maintainers. 

Goal 1: Provide guidance for community contributors

Relevant tasks:  

* Create/maintain contribution guidance documentation
* Review PRs in a timely fashion
* Create friendly issues for first-time contributors
* Provide real-time tech support for contribution related topics

Goal 2: Relieve community contributors from most fastidious, ingrate tasks

Relevant tasks: 

* Maintain/improve infrastructure, e.g. build, tests, linting etc.
* Plan and manage releases
* Backports to support of old Scala version
* Create documentation

Goal 3: Ensure the ecosystem is unblocked

Relevant Tasks: 

* Fix mission-critical bug 
* Address security vulnerabilities
* Enforce compatibility guarantees
* Take on initiatives that require a significant amount of effort usually too large for casual contributors to 
take on, e.g. complete Scala 2.13 migration; merging in typelevel/algebra; integration with Scala 3.0 std library, etc.

Funding source

We rely on donations from corporation and individual users of the OSS libraries. Aside from monetary assistance, companies can support us by:

* Providing computing resources/tools such as CI systems, communication platforms, development tools, etc.
* Paid employees' time for code contributions
* Sponsor events such as free training, conferences, by providing the venue, food, etc.
* Donation of training/support services or coupons that we can then exchange for monetary contributions.  

Perks for sponsoring companies include

* Branding on our sponsors' list (at $200 per month or 100 paid employee hours per year)
* Job posts (at $500/month level)
* Training / Technical support (if we receive such donations)

We reserve the right to respectfully decline sponsorship offers. 

Typelevel libraries in the program

1. Cats and its external modules projects including
   * cats-effect
   * cats-mtl
   * mouse
   * kittens
   * cats-tagless
   * Cats-collections
2. Shapeless
3. Spire

We are in the process of enlisting more Typelevel libraries into the program based on their maintainers’ as well as sponsors’ interests.

Please don't hesitate to reach out with questions. Our contact Email is [email protected] 

Thank you for reading this and considering supporting us.

Our team

Kailuo Wang

Core Contributor