1.            Amazon Kindle Direct Publishing (KDP) - Primarily using its MOBI format, Amazon KDP also converts ePUB files to MOBI when uploaded.
2.            Apple Books - A major platform that distributes eBooks directly to Apple devices and accepts ePUB format.
3.            Google Play Books - This channel accepts ePUB format and offers a wide reach due to the integration with Android devices.
4.            Barnes & Noble Press - This platform accepts ePUB files for Nook eReaders and has a significant presence in the U.S. market.
5.            Kobo Writing Life - Kobo accepts ePUB format and distributes eBooks globally, also sharing its library with affiliated retailers.
6.            Smashwords - An aggregator that distributes ePUB files to a wide range of smaller bookstores and libraries.
7.            Draft2Digital - Similar to Smashwords, it distributes ePUB eBooks to numerous retailers and libraries worldwide.
8.            Lulu - Offers eBook distribution services for ePUB formats to various booksellers.
9.            Scribd - A subscription service that offers eBooks, including those in ePUB format, to its users.
10.         IngramSpark - An aggregator that enables distribution to a wide network of bookstores and libraries.
11.         BookBaby - Provides comprehensive distribution services, including ePUB formatting and distribution to major eBook retailers.
12.         StreetLib - An international distribution service that publishes eBooks to over 200 stores and 70 countries.
13.         Blurb - Besides photo books and paperbacks, Blurb also distributes ePUBs and offers unique design software.
14.         Gardners - A UK-based wholesaler that distributes eBooks globally, including ePUB format to various retailers.
15.         Bookmate - A subscription-based service that distributes eBooks, including ePUBs, and focuses on markets in Russia, Singapore, and Scandinavia.
16.         OverDrive - Primarily a service for libraries but also a significant channel for distributing ePUB eBooks worldwide.
17.         Baker & Taylor - A major distributor that supplies eBooks, including ePUB format, to libraries and educational institutions.
18.         Ciando - One of the largest eBook distributors in German-speaking countries, offering ePUB format to a wide range of digital stores.
19.         Hoopla - Provides eBooks, including ePUBs, to libraries in North America, with a per-checkout transaction model.
20.         Tolino - A collective eBook platform that dominates the German market, closely integrated with several large German book retailers.
21.         txtr - A digital reading platform that distributes eBooks, including ePUBs, primarily in Europe.
22.         Scribd - A reading subscription service that offers a wide range of eBooks in ePUB format among other types of content.
23.         24Symbols - A subscription-based service that provides access to a wide range of eBooks, including those in ePUB format, worldwide.
24.         Versa Press - Offers eBook conversion and distribution services, supporting ePUB formats for various retailers.
25.         Vearsa - Distributes eBooks to over 1,000 online channels, supporting ePUB format among others.
26.         eSentral - The largest eBook store in Southeast Asia, distributing ePUB files across Malaysia, Singapore, and Indonesia.
27.         Perlego - A subscription-based academic book service offering a vast library of educational and professional eBooks in ePUB format.
28.         Wheelers - A New Zealand-based platform that provides ePUBs to schools and public libraries in the region.
29.         eBook Partnership - A distribution service that delivers ePUBs to over 60 global retailers.
30.         Odilo - Supplies a diverse range of digital content, including ePUBs, to libraries across Europe and North America.
31.         Matrubharti - A platform catering to Indian languages, distributing eBooks in ePUB format among others.
32.         Total Boox - Offers a unique model where readers pay for the pages they read, supports ePUB format for various devices.
33.         Bookwire - A distribution service that manages eBook sales and distribution in over 70 countries, supporting ePUB formats.
34.         BookFusion - Provides a platform for reading and sharing eBooks, including ePUB files, with a strong focus on Caribbean literature.
35.         NetGalley - Primarily a review service, but also facilitates the distribution of digital review copies in ePUB format to readers worldwide.
36.         Feedbooks - An eBook retailer that sells a wide range of eBooks, including ePUBs, to an international audience.
37.         DigitalBooks.bz - Distributes eBooks, including ePUB formats, with a focus on Latin American markets.
38.         Slicebooks - Offers a unique service slicing and dicing eBooks and selling them by the chapter, supports ePUB format.
39.         Bookshout - Distributes eBooks and runs marketing campaigns, provides ePUB files tailored for their custom app.
40.         Copia - Supplies ePUBs to educational institutions and corporate clients, alongside tools for content engagement and analytics.
41.         Flipkart - Once a major player in the Indian eBook market, it offered a wide range of ePUB eBooks before discontinuing the service. Its impact on the market was significant during its operational period.
42.         ReadCloud - An Australian platform providing ePUBs primarily to educational sectors, offering collaborative learning tools.
43.         Axiell Media - A Nordic digital distribution service that provides eBooks, including ePUBs, to libraries and schools in Scandinavia.
44.         FNAC - A French retail chain that also offers an online platform distributing ePUB eBooks among other formats.
45.         Libreka - A German eBook distributor that handles ePUB formats, serving both publishers and retailers.
46.         Numilog - Distributes French-language eBooks, including ePUBs, and operates both a retail and a library platform.
47.         Palibrio - Caters to the Spanish-speaking market, offering self-publishing services and eBook distribution in ePUB format.
48.         PaperC - Focuses on the academic and professional markets, distributing eBooks, including ePUBs, primarily in German.
49.         Rockstand - Previously an Indian eBook and eMagazine retailer offering ePUB downloads, now inactive but was influential in the region.
50.         Sanborns - A Mexican retail chain offering digital goods including ePUB eBooks through its online platform.
51.         Cengage Learning - Provides educational and academic content, including ePUBs, for schools and higher education.
52.         Wolters Kluwer - A global provider of professional information, software solutions, and services, including ePUB eBooks in the legal, business, and medical fields.
53.         Chegg - Known for textbook rentals and educational services, Chegg also offers ePUB format eBooks, especially in the academic sector.
54.         VitalSource - Offers eBooks and textbooks in ePUB format, primarily serving students and educators worldwide.
55.         RedShelf - Provides digital textbooks, including ePUBs, focusing on making education both affordable and accessible.
56.         Perusall - An e-learning platform that encourages students to read and interact with learning materials, including ePUB format eBooks.
57.         Snapplify - Specializes in education and learning content, distributing ePUB eBooks to schools and institutions primarily in Africa.
58.         MBS Textbook Exchange - A major textbook distributor that supplies ePUB eBooks to college bookstores across the U.S.
59.         Zola Books - Although less prominent now, it was an innovative social eBook retailer that offered ePUB format among others.
60.         Blio - A reading platform that provided eBooks in ePUB format, with a focus on accessibility features like text-to-speech.
61.         CampusBooks - Offers buying and renting of college textbooks, including ePUB formats, aiming to provide affordable educational materials.
62.         eCampus - Specializes in educational content, providing an online bookstore for ePUB textbooks and other digital resources.
63.         BookRenter - Focuses on renting textbooks, including ePUB formats, to students across the United States.
64.         Kortext - A UK-based platform providing digital textbooks and educational content in ePUB format to universities and students.
65.         BlinkLearning - Offers digital educational resources, including ePUB eBooks, to schools and institutions worldwide.
66.         Direct Textbook - Searches across online stores to find the best prices on textbooks, including those available in ePUB format.
67.         TextbookRush - Provides a marketplace for buying, selling, and renting textbooks in ePUB format and other digital resources.
68.         Textbooks.com - Operates primarily in the U.S., offering a wide range of textbooks in ePUB format for purchase or rent.
69.         SkyScape - Specializes in medical eBooks and professional health resources, offering many titles in ePUB format.
70.         GoSyllabus - An emerging platform focusing on academic and competitive exam preparation materials, including eBooks in ePUB format.
71.         Better World Books - Focuses on selling new and used books, including ePUB eBooks, with a mission to promote literacy worldwide.
72.         Alibris - An online marketplace that connects buyers with independent sellers of books and textbooks, including ePUB formats.
73.         ThriftBooks - Sells a wide variety of used books at affordable prices, including digital formats like ePUB.
74.         Powell’s Books - An independent bookstore that also offers eBooks in ePUB format through its online platform.
75.         Blackwell’s - A UK-based academic book retailer offering a wide range of eBooks, including ePUBs, focusing on educational content.
76.         Waterstones - The largest bookstore chain in the UK, which also provides eBooks in ePUB format through its online store.
77.         WHSmith - A well-known retailer in the UK that offers a range of digital books in ePUB format, targeting both general and academic readers.
78.         Booktopia - An Australian online bookstore that sells books, eBooks, including those in ePUB format, to an Australian audience.
79.         Angus & Robertson - Another Australian retailer providing a variety of books, including ePUB eBooks, to the Australian market.
80.         Exclusive Books - A leading South African bookstore chain that also offers a selection of ePUB eBooks online.
81.         Foyles - A renowned UK bookstore with a substantial online presence, offering a variety of eBooks, including those in ePUB format.
82.         Daunt Books - A UK-based bookshop chain that offers a curated selection of eBooks in ePUB format, emphasizing quality literature.
83.         Books-A-Million - One of the largest book retailers in the USA, which includes eBooks in ePUB format among its offerings.
84.         Dymocks - An Australian bookstore chain offering a wide range of books, including ePUB eBooks, through its online store.
85.         Jarir Bookstore - A leading retailer in Saudi Arabia that offers educational and professional books, including ePUBs.
86.         Kinokuniya - A Japanese bookstore chain with international stores, offering a selection of ePUB eBooks through its various outlets.
87.         Libreria Nacional - A Colombian bookstore chain that provides a wide range of books, including digital versions in ePUB format.
88.         Magrudy’s - A UAE-based bookstore offering educational books and more, with ePUB eBooks available for a Middle Eastern audience.
89.         MPH Online - A Malaysian online bookstore that provides various books, including ePUB eBooks, catering to the Malaysian market.
90.         National Book Store - The largest bookstore chain in the Philippines, which also offers a range of eBooks in ePUB format to its customers.
91.         Eason - A major Irish retailer offering books and eBooks, including ePUBs, catering mainly to the Irish market.
92.         Feltrinelli - An Italian bookstore chain that also provides a variety of eBooks in ePUB format through its online platform.
93.         FNAC Portugal - Part of the French retail chain, this outlet offers a wide range of ePUB eBooks to Portuguese customers.
94.         Gramedia Digital - An Indonesian online store offering a broad selection of eBooks, including those in ePUB format, focusing on Indonesian readers.
95.         Livaria Cultura - A prominent Brazilian retailer that sells a wide variety of books, including eBooks in ePUB format.
96.         Pandora - A Turkish bookstore chain that offers a range of ePUB eBooks, focusing on both Turkish and international literature.
97.         Rakuten - While better known for its broader e-commerce operations, Rakuten offers ePUB eBooks through its various global marketplaces.
98.         Sanborns Mexico - Offers a selection of ePUB eBooks through its extensive chain of retail stores and online platform in Mexico.
99.         Takealot - South Africa's leading online retailer provides a wide range of products, including ePUB eBooks.
100.       Wook - A Portuguese online bookstore that offers a vast selection of ePUB eBooks, catering to Portuguese-speaking audiences.
101.       Thalia - A German retailer with a strong online presence offering a wide range of ePUB eBooks, catering to German-speaking audiences.
102.       Hugendubel - Another major German bookstore chain that provides a variety of eBooks, including those in ePUB format, through its online store.
103.       Libri - Based in Germany, this distributor offers a broad selection of ePUB eBooks available for various retailers.
104.       Orell Füssli - A Swiss bookseller with a comprehensive online shop that includes eBooks in ePUB format, serving the Swiss market.
105.       Tanum - A Norwegian bookstore that offers a wide array of eBooks in ePUB format, catering to Norwegian readers.
106.       CDON - Based in the Nordic countries, this online retailer offers a broad range of products, including ePUB eBooks.
107.       Tattered Cover - An independent bookstore in the United States that provides a selection of eBooks in ePUB format through its online portal.
108.       Deseret Book - Specializes in religious and family-oriented material, offering eBooks, including ePUBs, primarily to an LDS audience.
109.       Indigo Books and Music - Canada's largest book retailer which also offers a range of ePUB eBooks through its online platform.
110.       American Book Center - A bookstore in the Netherlands that caters to an English-speaking audience with a variety of ePUB eBooks.
111.       Bertrand - A Portuguese bookstore with a significant online presence, offering a wide range of ePUB eBooks.
112.       Dussmann - A German cultural department store that also offers an extensive selection of eBooks in ePUB format.
113.       Adlibris - A major Swedish online bookstore that provides ePUB eBooks, catering to Scandinavian readers.
114.       Arnold Busck - A Danish retailer specializing in cultural products, including eBooks in ePUB format, through its online platform.
115.       Bokus - Another Swedish online bookstore that sells a variety of ePUB eBooks, popular among Swedish readers.
116.       Bookeenstore - A French eBook store that provides a wide range of ePUB files, accessible to French-speaking audiences.
117.       Weltbild - One of the largest book retailers in Germany, offering a broad selection of eBooks, including ePUBs.
118.       Elefant.ro - A Romanian online retailer that sells books, eBooks in ePUB format, and other products, catering to the Romanian market.
119.       Knihy Dobrovský - A Czech bookseller that offers an extensive range of ePUB eBooks through its online store.
120.       Libro - An Austrian chain that provides not only books but also ePUB eBooks, focusing on the Austrian market.
121.       Porrúa - A prominent Mexican bookstore chain that offers a variety of eBooks, including those in ePUB format, catering to the Mexican audience.
122.       SuperBookDeals - An online retailer that offers competitive prices on books and eBooks, including ePUB formats, to a global market.
123.       Imosver - A Spanish online bookstore providing a wide range of ePUB eBooks, focusing on the Spanish-speaking market.
124.       La Central - A Spanish bookstore with several locations and an online presence that includes a selection of ePUB eBooks.
125.       Lehmanns - A German academic bookseller that also provides professional literature in ePUB format to students and professionals.
126.       Bücher.de - An online German bookstore that offers a wide range of media, including ePUB eBooks.
127.       Standaard Boekhandel - A Belgian book retailer that offers a wide selection of books, including eBooks in ePUB format.
128.       Menard Press - Specializes in poetry and literary works, offering select titles in ePUB format through its digital channels.
129.       Tygpress - An online platform that provides eBooks, including ePUBs, with a focus on Czech and Slovak markets.
130.       Van Stockum - A Dutch bookstore offering books and eBooks, including ePUB formats, catering to the Dutch-speaking audience.
131.       ABC Books - A Czech bookseller that offers a broad selection of ePUB eBooks, catering primarily to readers in the Czech Republic.
132.       Blackwell's UK - A major academic bookseller in the UK that provides ePUB eBooks, focusing on university students and academic professionals.
133.       Book Depository - Known for its free worldwide shipping, this UK-based online book retailer also offers a selection of ePUB eBooks.
134.       Librerías Gandhi - A well-known Mexican bookstore chain that offers a wide variety of books, including eBooks in ePUB format.
135.       Casa del Libro - A leading Spanish online bookstore that sells a comprehensive range of ePUB eBooks across Spain.
136.       Chapters/Indigo - Canada's largest book retailer, providing a variety of ePUB eBooks through its online platform.
137.       Mondadori Store - An Italian bookstore chain and online retailer that offers a wide selection of ePUB eBooks.
138.       Eason Ireland - One of Ireland's major bookstores, offering a broad range of ePUB eBooks through its online store.
139.       JB Hi-Fi - While primarily known for electronics, this Australian retailer also provides ePUB eBooks through its online platform.
140.       MPH Bookstores - A Malaysian book retailer that offers ePUB eBooks, catering to the reading preferences of the Malaysian market.
141.       Fnac Spain - Part of a French multinational, offering a variety of ePUB eBooks in Spain.
142.       Rizzoli Bookstore - An Italian bookstore with a significant online presence, offering ePUB eBooks in Italy.
143.       Tanum Norway - A major Norwegian bookseller providing ePUB eBooks to Norwegian readers.
144.       Livraria Lello - A historic Portuguese bookstore known for its beautiful architecture and a selection of ePUB eBooks.
145.       Akademibokhandeln - Sweden's largest book retailer, offering a range of ePUB eBooks suitable for Swedish audiences.
146.       Omfifteen - A niche online platform specializing in business and economics eBooks, including formats like ePUB.
147.       Payot Librairie - A Swiss bookstore chain offering a variety of ePUB eBooks in French and German.
148.       Livraria Cultura Brazil - One of Brazil’s largest bookstores, providing a wide range of ePUB eBooks for the Brazilian market.
149.       Wallace Books - A UK-based online retailer specializing in historical and military eBooks, including ePUB formats.
150.       Barton's Bookstore - An independent Australian bookstore that has expanded to include ePUB eBooks in its offerings.