theoryunderground alternatives: newsletters like it

SubstackSeveral times a week · last post 8 days ago

I write and illustrate comics about arcane action and adventure. Titles include Impure Blood, Concrete Arcanum, and Paladin Lost.

Likely audience: Kickstarter backers

2 shared topics

SubstackEvery two weeks · last post 9 days ago

An independent game publisher. Cosmic Chains | Siclen Valley universe: board game, animation, novel

Likely audience: Kickstarter backers

2 shared topics

SubstackMonthly or less · last post Sep 11, 2026

From recent posts: This publication covers indie game development, Kickstarter campaigns, and specific titles like Effervescent, Flock Ton of Flamingos, and Spelling Beach. It consistently publishes news about funding rounds, launch…

Likely audience: Indie game developers

2 shared topics

SubstackMonthly or less · last post 29 days ago

I write comics and epic urban fantasy books, talk about the behind-the-scenes process of publishing, and occasionally sing (one of these is not true). Books 1 and 2 of my NYC Questing Guild book series are free to read…

Likely audience: Comic book collectors

2 shared topics

SubstackWeekly · last post 14 days ago

From recent posts: The Second Bill of Rights publishes political advocacy content focused on federalism and the 2028 election cycle, primarily targeting donors and supporters of the project. The publication currently operates as a…

Likely audience: federalism advocates

1 shared topic

SubstackEvery two weeks · last post 15 days ago

De la finance, de l'économie, de l'immobilier et du web3. Mais en moins chiant.

Likely audience: investors

1 shared topic

SubstackSeveral times a week · last post 9 days ago

From recent posts: Dren Production's Newsletter publishes Kickstarter campaign announcements, Dungeons & Dragons monster and adventure content, and comic book event updates. It serves as a direct channel for the publisher's tabletop RPG…

Likely audience: Kickstarter backers

1 shared topic

SubstackSeveral times a week · last post 10 days ago

From recent posts: Progress Report publishes election tracking tools and candidate profiles focused on US Congressional and state legislative races, with recent coverage spanning Maine, Michigan, Wisconsin, and ballot initiatives. It is…

Likely audience: Political analysts

1 shared topic

SubstackEvery two weeks · last post 14 days ago

From recent posts: The publication focuses on horror comics and graphic novels, regularly covering Kickstarter campaigns for new releases, convention announcements (particularly New York Comic Con), and exclusive merchandise drops. Its…

Likely audience: Comic book readers

1 shared topic

SubstackSeveral times a week · last post 13 days ago

Uma tirinha nova toda quinta-feira, enviada diretamente para o seu e-mail.

Likely audience: planners and organizers

1 shared topic

SubstackMonthly or less · last post 10 days ago

From recent posts: CineMapper publishes weekly updates on its mobile application for mapping film locations in England, covering beta testing, server costs, and community engagement. The publication targets film tourism enthusiasts and…

Likely audience: Film enthusiasts

1 shared topic

SubstackMonthly or less · last post Sep 4, 2026

From recent posts: The Soloist is a newsletter dedicated to solo tabletop role-playing games, covering awards, crowdfunding campaigns, indie releases, and community play formats. It serves the tabletop gaming community with regular…

Likely audience: Indie game developers

1 shared topic

SubstackSeveral times a week · last post 8 days ago

Superpowers for Good helps people build and back businesses that make a difference through impact crowdfunding, social entrepreneurship and impact investing.

Likely audience: crowdfunding investors

1 shared topic

SubstackSeveral times a week · last post 9 days ago

La domenica chiacchieriamo di marketing e attualità, proprio come se stessimo insieme al bar, alcune volte davanti a un caffè, altre volte ci serve almeno un gin tonic! Il martedì arriva Grow on Substack!

Likely audience: Content creators

1 shared topic

SubstackSeveral times a week · last post 8 days ago

Likely audience: Star Trek fans

1 shared topic

SubstackEvery two weeks · last post 16 days ago

From recent posts: This newsletter publishes book marketing updates, Kickstarter campaign announcements, and audiobook release news for Aaron Hodges' grimdark fantasy series. It serves readers interested in fantasy literature and author…

Likely audience: Kickstarter backers

1 shared topic

SubstackEvery two weeks · last post 19 days ago

Randomly irregular thoughts about books, film projects, and life as a writer in America from New York Times bestselling author and indie TV/film producer Suzanne Brockmann

Likely audience: Romance novel readers

1 shared topic

SubstackWeekly · last post 17 days ago

From recent posts: The Sunday Letter Project publishes a weekly culture newsletter centered on letter writing, community building, and stationery. Recent issues blend writing prompts and Instagram milestones with coverage of literature…

Likely audience: letter writers

1 shared topic

SubstackMonthly or less · last post Aug 26, 2026

Four-time Canadian Folk Music Award nominated songwriter, herbal medicine student and Southwest Scotland dweller.

Likely audience: Music fans seeking folk or country albums

1 shared topic

SubstackEvery two weeks · last post 9 days ago

mixtapes for the modern world

Likely audience: music enthusiasts

1 shared topic

SubstackSeveral times a week · last post 8 days ago

From recent posts: Eyes & Ears North East publishes a weekly newsletter covering regional news, economic crime, and local governance issues across the North East of England. The publication features a mix of hard news reporting on topics…

Likely audience: local government officials

1 shared topic

SubstackSeveral times a week · last post 8 days ago

From recent posts: Ines Johnson publishes practical planning tools and marketing advice for indie authors, including 90-day launch and social media planners, annual Kickstarter campaigns, and writing craft bundles. The newsletter also…

Likely audience: indie authors

1 shared topic

SubstackWeekly · last post 7 days ago

From recent posts: Wolf publishes essays on publishing industry consolidation, higher education, and social media algorithms alongside book promotion updates. The content mixes cultural criticism with industry news and personal essays on…

Likely audience: Fantasy book readers

1 shared topic

SubstackWeekly · last post 27 days ago

From recent posts: War and Peas publishes community-focused updates on its comic strip and Patreon initiatives, specifically highlighting environmental projects like tree-planting events in Germany. The publication targets its reader base…

Likely audience: content creators

1 shared topic