Company lists · Data refreshed November 2026

Top 16 Sister city organizations worldwide

RevenueBase identified 70 company matches for sister city organizations worldwide as of November 2026 and tracks 306 professional contacts across them, including 41 with verified work emails. The United States is the largest market and Austin the largest hub.

This list covers company matches for sister city organizations worldwide, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed November 6, 2026. Country and city lists for sister city organizations follow the table.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list RevenueBase SmartSearch · Exact Recorded Nov 6, 2026 How this list was built
70Companies
306Contacts tracked
41Verified emails
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The 16 largest sister city organizations worldwide

Ranked by team size
Top 16 of 70 company matches for sister city organizations worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 6, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchWashington, DC, United StatesHQ recorded Nov 6, 2026n/a94 contacts →

Exact match

“Our mission: To promote peace through mutual respect, understanding, and cooperation, one individual, one community at a time.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
2Exact matchLouisville, KY, United StatesHQ recorded Nov 6, 20261-1016 contacts →

Exact match

“The World Affairs Council of Kentucky & Southern Indiana delivers opportunities for the community to connect with global leaders and engage with peers on international issues.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
3Exact matchTulsa, OK, United StatesHQ recorded Nov 6, 20261-108 contacts →

Exact match

“A cornerstone of the Tulsa community since 1976, Tulsa Global Alliance is an award-winning non-profit organization focused on building global community.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
4Exact matchSan Diego, CA, United StatesHQ recorded Nov 6, 202611-508 contacts →

Exact match

“Formed in 1993, SanDISCA was established by the City of San Diego to support the 16 Sister City partnerships that exist in 15 different countries.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
5Exact matchSeattle, WA, United StatesHQ recorded Nov 6, 20261-107 contacts →

Exact match

“The Hyogo Business & Cultural Center is an overseas office of the Hyogo prefectural government based in Seattle.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
6Exact matchAustin, TX, United StatesHQ recorded Nov 6, 202651-2007 contacts →

Exact match

“Austin Sister Cities International aims to promote international understanding in our fast-paced, globalized world.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
7Exact matchArlington, VA, United StatesHQ recorded Nov 6, 20261-105 contacts →

Exact match

“Arlington Sister City Association (ASCA) is a nonprofit organization affiliated with Arlington County, Virginia.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
8Exact matchGilbert, AZ, United StatesHQ recorded Nov 6, 202611-504 contacts →

Exact match

“Gilbert Sister Cities is a nonprofit (501C3) organization based out of Gilbert, Arizona.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
9Exact matchAustin, TX, United StatesHQ recorded Nov 6, 202611-503 contacts →

Exact match

“Catalyst and convener, the Austin Florence Alliance is forging a partnership between two of the world’s most visionary cities.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
10Exact matchPalm Springs, CA, United StatesHQ recorded Nov 6, 20261-103 contacts →

Exact match

“At Palm Springs Sister Cities, we believe that enriching lives through collaborative and influential partnerships is the key to building a better world.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11Exact matchLos Angeles, CA, United StatesHQ recorded Nov 6, 202611-502 contacts →

Exact match

“Sister Cities International Southern California Chapter, Inc.(SoCal Sister Cities), a tax-exempt 501(c)(3) organization, was established as an extension of Sister Cities…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
12Exact matchGrand Rapids, MI, United StatesHQ recorded Nov 6, 202611-501 contacts →

Exact match

“Grand Rapids Sister Cities International (GRSCI) is a non-profit organization that works to build relationships between Grand Rapids and its sister cities by promoting…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13Exact matchPalo Alto, CA, United StatesHQ recorded Nov 6, 20261-101 contacts →

Exact match

“Sibling Cities USA facilitates the cross-regional pairing of US cities to develop deep relationships, create friendship, and broaden understanding.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
14Exact matchPrague, Czech RepublicHQ recorded Nov 6, 20261-101 contacts →

Exact match

“The City of Prague is a vibrant international capital with strong diplomatic partnerships all over the world and bustling business environment with a vibrant culture.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15Exact matchCharleston, SC, United StatesHQ recorded Nov 6, 20261-101 contacts →

Exact match

“Charleston Sister Cities International (CSCI) is a member of Sister Cities International, an international non-profit organization created by President Dwight D.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
16Exact matchSan Francisco, CA, United StatesHQ recorded Nov 6, 20261-101 contacts →

Exact match

“California-Japan Sister Cities Network (“CJSCN”) provides support to the sister city and friendship city relationships between California and Japan to nurture and cultivate…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase

Showing 16 of 70 sister city organizations worldwide

See the full list, filter by size, metro and specialty, and access 41 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Sister city organizations worldwide at a glance

As of Nov 6, 2026
13.4%Verified-email coverage
4.4Average contacts per company
1-10Median size (employees)
2.9%Largest-city concentration · Austin
Nov 6, 2026Page data refreshed

Companies by employee count

1-10
46
11-50
19
51-200
3
201-500
1

Email recency is reported on each country list linked below.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source
The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
Coverage
Every country. Country and city lists for sister city organizations are linked below.
What qualifies
Company records worldwide whose business descriptions match “sister city organizations” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch
Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview
The public preview omits records without a verified work email. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality
RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
Ranking
Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification
Every displayed company carries at least one verified work email. RevenueBase tracks 41 professional contacts with verified work emails across the full matched dataset. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh
This page's figures were pulled from the company graph on November 6, 2026. Lists refresh periodically as the graph is re-checked.
Record context
Company records and descriptions can change. Check the company's website for its current services and locations.

Sister city organizations by location

1 lists · largest first

Every Sister city organizations list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “sister city organizations”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many sister city organizations are there worldwide?

RevenueBase identified 70 company matches for sister city organizations worldwide as of November 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Sister Cities International tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which country has the most sister city organizations?

The United States leads with 48 companies. Every sister city organizations list by country and city is linked on this page.

Which city has the most sister city organizations?

Austin leads with 2 company records, followed by Gilbert (2) and Palo Alto (2).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 41 professional contacts with verified work emails tracked across these 70 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on November 6, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase SmartSearch, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.