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Companies using Sympa by Open Source in 2025

As of 2025, 210 verified companies use Sympa – across industries, company sizes, and geographies. This is real, verified data. Whether you’re looking to analyze the market, build a target list, or get a sales edge – this is your starting point.

https://www.opensource.org

What is Sympa by Open Source?

Sympa by opensource.org is an open-source mailing list management system. It is used to automate and facilitate the management of email lists, including subscription, moderation, and archiving. It’s widely used to streamline operations in areas like IT, communication, and community engagement.

Last updated date

August 17, 2025

Number of Companies using

210

The majority are based in the

United States

Most common industry?

Business Services

Sympa’s sample user list in 2025

Company Name

Country

Industry

Employees

Revenue

Product

DHL International

Germany flag
Germany

Freight & Logistics Services

395000

$70.8B

Sympa

U.S. Department of Justice

United States flag
United States

Federal

115000

$70B

Sympa

Compass Group

United Kingdom flag
United Kingdom

Food Service

580000

$42B

Sympa

Scania

Sweden flag
Sweden

Motor Vehicles

58000

$11.5B

Sympa

Chewy

United States flag
United States

Pet Products

18000

$12.1B

Sympa

Oerlikon

Switzerland flag
Switzerland

Holding Companies & Conglomerates

12620

$3.2B

Sympa

Duke University

United States flag
United States

Colleges & Universities

47132

$8.2B

Sympa

ManTech International

United States flag
United States

Custom Software & IT Services

9000

$2.2B

Sympa

Stanford Health Care

United States flag
United States

Physicians Clinics

17200

$2.5B

Sympa

Murata

Japan flag
Japan

Electronics

10000

$10.8B

Sympa

Showing 10 of 210 results

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We have data on 210 companies that use Sympa. Our Sympa customers list is available for download and comes enriched with vital company specifics, including industry classification, organizational size, geographical location, funding rounds, and revenue figures, among others.

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Sympa users and customers by country

United States flag
United States
Finland flag
Finland

2.6K Companies

France flag
France

2.6K Companies

Sweden flag
Sweden

2.6K Companies

Germany flag
Germany

2.6K Companies

Where Sympa Shows Up Most

Sympa is used across a wide range of sectors:

Business Services

Education

Colleges & Universities

Manufacturing

Healthcare Services

From lean startups to global enterprises, Sympa’s footprint is wide, and that means opportunity.

sectors

How It Works

It’s everything you wish outbound was—automated, precise, and scalable.

  • Landbase finds and qualifies your ideal prospect data automatically
  • Landbase deploys specialized AI agents to generate and run high-converting campaigns
  • Landbase executes across all channels, handling all the technical complexity behind the scenes.
  • Your pipeline fills up. You get to focus on strategy, not busywork.

Trusted by High-Performing GTM Teams

Join the teams using Landbase to:

  • Eliminate manual prospecting
  • Fill pipeline faster
  • Win against competitors
  • Built for SDRs, AEs, RevOps, and GTM Leaders
  • Powered by AI. Delivered with Speed

This data is updated on August 17, 2025

Sympa is an open-source mailing list management system used to automate and facilitate the management of email lists, including subscription, moderation, and archiving.

As of 2025, 210 verified companies are using Sympa.

Sympa is used across various industries, company sizes, and geographies.

It’s widely used to streamline operations in areas like IT, communication, and community engagement through email list management.

The United States is the country with the highest number of companies using Sympa.