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as of this HN discussion:

For anyone who needs a "download and go" way to play with Lisp, Allegro offers a free version. It's one installation. For VS Code, I'd wire-up SBCL as others have said. It's a little touchy to get setup but we produced our product with it so it does work.

The whole issue of "flavors" largely comes down to one concept: Do you like the idea of functions and variables being in the same namespace (that's called a Lisp 1 like Scheme) or different (a Lisp 2 like CL). If you don't care, it doesn't matter which you pick.

If you're going to extend your Lisp app into production, you might want some of the many libraries that are available for CL. These cover just about every known topic and algorithm in comp sci and they're old and proven and just work everywhere, so that can be a benefit as you move to a non-trial app.

If you're going to distribute something written in Lisp (like an executable), then the flavor and implementation you pick will need to work all the way down your distribution path, and that can be challenging to get setup. One proven path is SBCL + Node.js + Electron to wrap your app for all three platforms.

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Awesome Lisp Company

Lisp logo

Awesome Lisp Company is the curated lisp for companies that use Lisp Extensively in their stack.

This list intended only for company with Common Lisp and Scheme usage

Table of Contents

North America

United States

  • Acceleration
    • Acceleration is a leading provider of business class IT solutions: high-speed internet access services, private network design and managed support, website design, hosting, dedicated and virtual server hosting,... they have a Github account.
  • Alphacet, LLC 👼
    • software tools for analysts, traders, and portfolio managers. Stamford, CT. Includes post-sales work helping clients expand proprietary trading libraries in Lisp.
    • Disappeared as of January 2018.
  • Boeing
    • uses the Allegro NFS Server in the onboard network system of Boeing 747 and 777 aircraft (source: video, ELS 2015).
  • Clozure Associates
    • software development consulting firm specializing in Common Lisp development. Somerville, MA. Sponsors and developers of OpenMCL.
    • Active as of January 2018.
  • Eaton Vance
    • financial services. Boston, MA. Bruce Lewis created BRL , a dialect of Scheme called “a database-oriented language to embed in HTML and other markup.”
    • Active as of January 2018
  • Franz Inc.
    • offers AllegroCL, a Common Lisp compiler and programming environment; AllegroGraph, a graph database / triple store written in Common Lisp; and consultancy services. Oakland, CA.
    • Active as of September 2018
  • Genworks
    • provides General-purpose Declarative Language (GDL), a Generative Application Development system for creating web-centric Knowledge Based Engineering and Business applications, based on the free software Gendl. Genworks uses AllegroCL, its Head of Product Development is the founder of the Common Lisp foundation.
  • GrammaTech
    • Source code analysis tools for C, C++, Ada. Ithaca, NY. Hiring software engineers and interns with experience programming in Scheme, compilers, and static analysis.
    • Active as of January 2018
  • GraphMetrix
    • automation of document extraction and publishing for construction, property and logistics.
    • Active as of September 2020.

"We are using Lisp as the main engine for our RDF -> Sparql -> in-memory rdf db -> conceptual inference system at graphMetrix"

  • iRobot
    • a company that designs and builds consumer robots for inside and outside of the home, including a range of autonomous home vacuum cleaners (like the Roomba, whose native code is written in a compatible subset of Common Lisp). research paper.
  • ITA Software by Google
  • Nasa
    • the Nasa develops PVS, "the People's Verification System". PVS is a verification system: that is, a specification language integrated with support tools and a theorem prover. See also pvslib.
    • photo sharing site aimed towards casual photographers. Beverly, MA. Kawa Scheme running on JVM, created by Bruce Lewis
  • Secure Outcomes
    • builds and provides digital livescan fingerprinting systems for use by law enforcement, military, airports, schools, Fortune 500s, etc. All their systems are constructed in Common Lisp (lispjobs announce).
  • ThirdLaw LLC
    • founded by Christian Schafmeister and Martin Cracauer, the CLASP and Cando developers, ThirdLaw provides support and services for computational chemistry.
  • Tilton Technology 👼
    • Common Lisp projects like Cells, Celtk, and Cello, and TheoryYAlgebra, a learning game. NYC? Site for Ken Tilton, well known and funny Lisper.
    • Disappeared as of January 2018
  • 👼
    • Open Source Desktop Management Software. Muncie, IN. Common Lisp (SBCL), article about why they chose Lisp, and about Lisp and Agile Development
    • Disappeared as of January 2018
  • Smart Information Flow Technologies
    • Contract research house. Minneapolis, MN. Mission objective: “Getting information where it belongs when it’s needed.” Hiring AI professionals to support human control of complex systems. Research areas include: Planning, Plan recognition, Intelligent UserInterfaces, Information Presentation and Management and Computational Etiquette. Have at least one product at opensource – Simple Hierarchical Ordered Planner 2 (SHOP2).
  • Biographicon 👼
    • “A place for everyone’s biography.” Wikipedia for people not notable enough to be on Wikipedia. San Francisco, CA. A YCombinator company, started by Ethan Herdrick and Daniel Terhorst. Running Kawa Scheme (also uses PLT Scheme for internal stuff).
    • Disappeared as of January 2018
  • Cadence
    • software and engineering services for electronic design automation. San Jose, CA (headquarters of worldwide company). Their IC design software uses SKILL (a Franz Lisp variant) as a scripting language.
  • GigaMonkeys Consulting
    • software development and QA consulting. Oakland, CA. Deserves mention because Peter Seibel wrote Practical Common Lisp, claimed by ITA Software as their training manual.
  • Rigetti Quantum Computing
    • Manufacturer of quantum computers and provider of their services through their product called Forest. Much of their code is written in Common Lisp, including their quantum virtual machine and quantum compiler. (video, paper, github)
  • SRI
  • StreamFocus
  • Inspiration Software, Inc
    • educational software, including InspireData, a product for building data literacy. Beaverton, OR. Made in LispWorks.
  • Synaptic Mash 👼
    • educational learning management system. Seattle, WA. Job requirements for server and web developers require experience with “Lisp Family”, SBCL, LispWorks
    • Disappeared as of January 2018
  • Tech Co-op
    • a not-for-profit, member-owned services co-operative dedicated to providing Technical Services for it’s members. Vancouver, Canada. Lisp for internal development and for members. Offers hosting and hosts many Lisp sites like,, and
  • EnRoute Systems
    • (formerly Trip Planner) - trip planning solutions including planning engine, web front-end, hosting, and data import/repair. Spokanne, WA. Lots of details on the Technical Info page (including discussion of packages, infrastructure, and algorithms). Made by Jean-Paul Larocque, who has more lisp code on his main site, ThoughtCrime. (news coverage)
  • 👼
    • online item trading. Tallahassee, FL. SBCL/Hunchentoot, mention Lisp on their Advantages page
  • Impact Solutions “Smart Drilling” 👼
    • real-time analysis of oil rig drilling data. Houston, TX. Four developers, won the Offshore Technology Conference’s “Spotlight on Technology” award.
  • Grammarly
  • Matchcraft 👼
    • aggregation-based, local Internet advertising – online Yellow Pages. Santa Monica, CA. Previously had a major production system written in Lisp, has several internal tools written in Common Lisp, and is developing new products in Lisp .
    • Disappeared as of January 2018
  • Mind AI
    • Founded in 2018, Mind AI is an artificial intelligence engine and an ecosystem that was created to offer an entirely new approach to AI.
  • Wukix
    • vendor of the MOCL implementation for mobile and OSX.
  • Daric
    • Industry-leading software to help manage risk and improve the customer experience for the world's leading financial institutions. Client of the MOCL mobile and OSX implementation.


    • organization supporting community radio broadcasting. Montreal, Canada. Job page mentions Scheme, web development, and graphics. Uses a Wiki powered by Gauche
  • Carre Technologies
    • intelligent machines. Montreal, Canada. Main page just lets you send mail, but the site includes a Chicken Scheme extension for Gnu/Octave and a floating point vector and matrix library for Gambit Scheme.
  • Categorical Design Solutions 👼
    • eLearning, Knowledge Management, multimedia content creation technology and dissemination of contents over the Internet. Montreal, Canada. Listed on MSLUG Home Page, can’t find any more details about Lisp or Scheme usage
    • Disappeared as of January 2018
  • D-Wave Systems Inc.
    • The Quantum Computing Company (trademark). The world's first company to sell quantum computers. Wikipedia Page
  • HexstreamSoft
    • Public Domain Common Lisp R&D. 14 years of intensive Common Lisp related work, including nearly a decade of Open Source Common Lisp. 30+ ready-to-use libraries in Quicklisp. Multiple important Common Lisp community resources. #1 Common Lisp site according to Alexa as of October 2020.
    • Active as of October 2020.
  • Idalia 👼
    • natural language processing technology. Montreal, Canada. Listed on MSLUG Home Page but all jobs mention C++ and not Lisp
    • Disappeared as of January 2018
  • Kronos, Altitude Division
    • Montreal, Canada. Listed on MSLUG Home Page, can’t find any more details about Lisp or Scheme usage
  • MetaScoop
    • consulting and custom development in Scheme. Montreal, Canada. Developed JazzScheme, recently released as Open Source.
  • NuEcho
    • speech enabled applications. Montreal, Canada. Scheme; Dominique Boucher was the main organizer of the Montreal Scheme/Lisp User Group (MSLUG)
  • Silex Creations
    • multimedia solutions for avant-garde businesses, audio synthesis. Montreal, Canada. Listed on MSLUG Home Page, can’t find any more details about Lisp or Scheme usage


  • Ikkiware
    • Developing a entrepreneurs oriented Social Network, which includes project management and productivity tools called Huuii Smart and Huuii People as a social network, Huuii Polls as a Polls tool and Huuii Sites as web site creator tool use SBCL, some of their post about Common Lisp.



  • 3E

    • Provides "consultancy services and software products to improve the performance of sustainable energy systems and optimize energy consumption". The real-time data aggregation and alerting engines of its Synaptic product is Common Lisp based. (job announce)
  • PEPITe 👼

    • manufacturing intelligence, data mining. Angleur, Liege, Belgium. Their product Pepito was featured in the Franz Success Stories page.


  • Mu Aps 👼
    • Building automatic trading systems. Farum, Denmark. Klaus Habro of Mu Aps wrote the cl-muproc library: Erlang-inspired multi-processing in Common Lisp. Two presentations (both pdf) and a summary.
  • SteelSeries ApS
    • Makes gaming accessories such as headsets, keyboards and mice. Games can integrate with these through the SteelSeries Engine using GoLisp, their open source Lisp written in Go, which aims to be compatible with MIT/GNU Scheme.


  • OpusModus Ltd
    • Building Opusmodus, an award-winning music composition software.
  • Virtual Insurance Products Ltd
    • Insurance MGA with a bespoke business to business web platform (with some customer facing parts) written in Common Lisp.
    • Active as of November 2020
    • and Github account
    • Currently (November 2020) looking to hire CL developer(s)


  • Steel Bank Studio 👼
    • SBCL consulting. Helsinki, Finland. One man consulting firm consisting of Nikodemus Siivola, SBCL hacker and co-founder of
    • Closed as the owner clarified



  • CoCreate

  • Cognesys

    • “automatic ascertainment and further processing of verbal and text messages” (Natural Language Processing). Ubach-Palenburg, Germany. Looking for experienced and fresh Lisp programmers
  • LambdaWerk

    • a software development and Web engineering company in Berlin, Germany, specialized in data interchange and transformation systems for the U.S. managed healthcare sector. Uses Clojure and Common Lisp.
  • MTU Aero Engines

    • MTU Aero Engines is Germany's leading engine manufacturer and an established global player in the industry. It engages in the development, manufacture, marketing and support of commercial and military aircraft engines in all thrust and power categories and industrial gas turbines. They use Allegro CL.
  • m-creations

    • Custom software solutions for mid-size to big companies in finance/payment, health care, and media. Using Common Lisp in different fields ranging from dynamic web applications and Natural Language Processing to systems engineering infrastructure in container clusters (DNS, dynamic load balancer).
  • stk-hamburg


  • Infometrics
    • Automatic Functional Sizing. Muiderberg, Netherlands. Analyzes requirements and design documents for business software to make a Function Point Analysis. Sole proprietorship (Ernst van Waning) using Allegro/Lispworks.



  • TurtleWare
    • A software (and Common Lisp) consulting boutique. Run by Daniel Kochmański, who maintains Embeddable Common Lisp.


    • decision-support systems for resource planning and management in transportation companies. Lisboa, Portugal. Allegro CL since version 5 – before that it was Lucid Lisp.


  • RavenPack
    • RavenPack is the leading big data analytics provider for financial services. Lots of NLP and multi-threaded, distributed systems programming in CL (Allegro CL). Marbella, Spain. Actively searching for CL (senior and junior) developers.


  • Anaphoric
    • natural language interface for relational databases. UmeÃ¥, Sweden. Including Michael Minock of UmeÃ¥ University. Downloadable demo of their CatchPhrase product. 20K lines of Clisp code.
  • Doremir Music Research AB
    • Developing ScoreCloud, a music notation software (a LispWorks product). Stockholm.
  • Noteheads 👼
    • digital sheet music creation and distribution. Sweden. Mentioned as a successful case study in Successful Lisp, but their website focuses more on their musical pedigree (including having the guy from Roxette on their board)
    • Disappeared as of January 2018
  • 👼
    • shareable notes and messages on any web page. Sweden. Common Lisp, Ties Stuij, an employee, writes the Fallen Frukt blog
    • Disappeared as of January 2018


  • Emotiq 👼
    • building a next generation blockchain with an innovative natural-language approach to smart contracts.
    • Disappeared as of January 2019
  • Shirakumo / Nicolas Hafner
    • Developing Kandria, a post-apocalyptic hack & slash platformer game.
    • Many other open source libraries and projects for game development and web development.


  • Keepit
    • a cloud-to-cloud backup service provider. Was hiring two Common Lisp developers in October, 2020.


South Africa

  • Mtsholdings
    • building Insite, a flexible, cloud-based B2B social sustainability management platform. Insite's core is built in Common Lisp.



  • Tachyon Technologies 👼
    • Quill program for typing in Indian languages, and Cspace, an open source p2p communication platform. Bangalore/Chennai, India. Jobs page mentions Common Lisp, Scheme, Lisp Interpreter, Optimizing Compiler, Natural Language Processing, Machine Learning. Job page includes coding puzzles!
    • Disappeareded as of January 2018
  • deftask
    • task management app for teams
    • deftask backend and the command-line app are written in CL.


    • Developing the next generation of symbolic AI systems
    • Uses LispWorks



  • Memetrics (now part of Accenture)
    • testing and optimization for digital marketers. Sydney. Includes Alain Picard, frequent poster to Lisp forums. A LispWorks success story. Their XOS Software platform automated marketing tests, making it cheaper and easier to run more tests.
    • Disappeared as of January 2018

Virtual or Unsure of Location

  • the PostgreSQL organization uses Common Lisp in at least two products:
  • Mimix, developing Nebula, a suite of new tools for working with facts and documents.
    • uses SBCL, Electron, AngularJS.
    • active as of December, 2020.
  • Raytheon SigLab
    • a signal processing analysis pipeline for developing algorithms. A LispWorks success story.
  • Untyped
    • web applications, custom software development, training. Virtual Office (5 people). PLT Scheme, very good blog
  • Utilitymage
    • In Utility Mage (Umage) the aim is to make as much of the utility management process transparent. This allows both utility managers and the invoiced entity access to the relevant data like invoices, trend reports, exception reports and audit trails, such as photos of meter readings. As of may 2018, it is a startup still in Health mode. Umage is built in Common Lisp.

Other Resources


  • 👼 : Dead Companies.


Guidelines to contribute

Please follow this format of the list, if you want to make a contribution.

  • [Company name](#link)
    • description. addditional information.
  • Put the name of the company and link to its homepage in the list.
  • Write a description and additional description for the company.
  • Make sure it is put under the appropriate location.
  • If the company doesn't fit in any existing location, make a new one for it.
  • Ensure everything is alphabetically sorted.



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