11 Companies That Use Haskell in Production

This page summarizes the projects mentioned and recommended in the original post on dev.to

InfluxDB – Built for High-Performance Time Series Workloads
InfluxDB 3 OSS is now GA. Transform, enrich, and act on time series data directly in the database. Automate critical tasks and eliminate the need to move data externally. Download now.
www.influxdata.com
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SaaSHub - Software Alternatives and Reviews
SaaSHub helps you find the best software and product alternatives
www.saashub.com
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  1. Hasura

    Blazing fast, instant realtime GraphQL APIs on all your data with fine grained access control, also trigger webhooks on database events.

    Hasura is an open-source GraphQL engine that gives you instant access to a GraphQL API for your data. In the GitHub repository of Hasura, Haskell is the most used language, followed by languages like TypeScript, JavaScript, Python, and Go.

  2. InfluxDB

    InfluxDB – Built for High-Performance Time Series Workloads. InfluxDB 3 OSS is now GA. Transform, enrich, and act on time series data directly in the database. Automate critical tasks and eliminate the need to move data externally. Download now.

    InfluxDB logo
  3. semantic-source

    Discontinued Parsing, analyzing, and comparing source code across many languages

    GitHub used Haskell for implementing Semantic, a command-line tool for parsing, analyzing, and comparing source code.

  4. haxl

    A Haskell library that simplifies access to remote data, such as databases or web-based services.

    Haxl, a framework for efficient and concise data fetching.

  5. Bond

    Discontinued Bond was a cross-platform framework for working with schematized data. The open-source project ended on March 31, 2025. (by microsoft)

    Microsoft uses Haskell in Bond, a cross-platform framework for working with schematized data.

  6. Glean

    System for collecting, deriving and working with facts about source code.

    Glean, a system for collecting and working with facts about source code.

  7. Puts Debuggerer

    Ruby library for improved puts debugging, automatically displaying bonus useful information such as source line number and source code.

    GitHub used Haskell for implementing Semantic, a command-line tool for parsing, analyzing, and comparing source code.

  8. cardano-node

    The core component that is used to participate in a Cardano decentralised blockchain.

    IOHK used Haskell to implement the Cardano blockchain platform and its smart contract language – Plutus. They chose it because Haskell is a perfect fit for high-assurance code in fields like finance and blockchain.

  9. SaaSHub

    SaaSHub - Software Alternatives and Reviews. SaaSHub helps you find the best software and product alternatives

    SaaSHub logo
NOTE: The number of mentions on this list indicates mentions on common posts plus user suggested alternatives. Hence, a higher number means a more popular project.

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Did you know that Haskell is
the 25th most popular programming language
based on number of references?