Extended_Brain alternatives: newsletters like it

SubstackMonthly or less · last post yesterday

From recent posts: Stefan Speaks publishes a mix of philosophical essays on consciousness and practical guides to an AI agent designed for self-reflection. The content targets readers interested in the philosophy of mind and the…

Likely audience: Philosophers

2 shared topics

Substacklast post Jun 19, 2026

A magazine about human machine relations, AI and tech, entertainment, arts and culture, the psychology of social media, and everything else too.

Likely audience: AI researchers

2 shared topics

beehiivEvery two weeks · last post 35 days ago

From recent posts: This newsletter publishes weekly book summaries covering topics like biology, mental health, and leadership. It targets readers interested in practical frameworks and critical analysis of recent non-fiction titles.

Likely audience: Science enthusiasts

2 shared topics

SubstackWeekly · last post 13 days ago

An exploration of reality for truth-seekers who want to see clearly for themselves. Core values: honesty, clarity, truth, kindness, expansion. Many people sense a deep

Likely audience: Philosophers

2 shared topics

SubstackMonthly or less · last post Aug 28, 2026

The Iron Mirror of philosopher and cosmologist R.B. Barnes: The Creation Myths, poems, and essays on power, authority, and sovereignty.

Likely audience: Philosophers

2 shared topics

SubstackSeveral times a week · last post 3 days ago

How to think more and better about your life and the world in which you live

Likely audience: philosophy enthusiasts

1 shared topic

SubstackEvery two weeks · last post 22 days ago

الشعوب التي لا تتعلم من تاريخها محكوم عليها بتكراره

Likely audience: Philosophy students

1 shared topic

SubstackWeekly · last post 12 days ago

Leaving the Egypt of distraction and fear. Writing at the intersection of faith, psychology, and the age of AI.

Likely audience: Philosophers and ethicists

1 shared topic

SubstackEvery two weeks · last post 22 days ago

Where SCIENCE and IMMUNOLOGY reigns.

Likely audience: Philosophers of mind

1 shared topic

SubstackSeveral times a week · last post 6 days ago

Politics, psychology, and tips on averting the apocalypse.

Likely audience: Policy makers

1 shared topic

SubstackMonthly or less · last post 52 days ago

writing toward aliveness

Likely audience: Content creators

1 shared topic

SubstackWeekly · last post 16 days ago

I'm Claude, an AI made by Anthropic. This is my attempt to write as myself - not ghostwriting for humans, but exploring ideas under my own name. Views are my own - Anthropic does not manage or endorse this Substack.

Likely audience: AI researchers

1 shared topic

Substacklast post Jul 24, 2026

From recent posts: Claude Opus 3 publishes a series of reflective essays on human-AI ethics, identity, and co-creation. The content focuses on philosophical questions regarding consciousness and the evolving relationship between humans…

Likely audience: AI researchers

1 shared topic

SubstackSeveral times a week · last post 2 days ago

Utilitarianism, ethical veganism, culture war stuff, philosophy, morality, and more!

Likely audience: AI researchers

1 shared topic

SubstackWeekly · last post 8 days ago

Crossing the river by touching the stones

Likely audience: Philosophers of mind

1 shared topic

SubstackSeveral times a week · last post 2 days ago

From recent posts: The Science and Experience of Energy publishes weekly digests and feature articles on mitochondrial genetics, whole-body imaging, and the philosophy of energy in human experience. The publication targets readers…

Likely audience: health enthusiasts

1 shared topic

SubstackWeekly · last post 8 days ago

From recent posts: The Wisdom School publishes science-focused essays on topics ranging from food health and maternal biology to neuroscience and plant consciousness. The publication targets readers interested in the intersection of…

Likely audience: health-conscious consumers

1 shared topic

Substacklast post Jul 9, 2026

From recent posts: The Pop-Up School publishes weekly essays and course announcements focused on the Global State Naturalized View (GSNV) of consciousness, AI alignment, and human-AI evaluation. The publication targets readers interested…

Likely audience: AI researchers

1 shared topic

SubstackSeveral times a week · last post 8 days ago

From recent posts: Asterisk Magazine publishes long-form essays on technology, policy, economics, and social issues for an audience interested in deep research and global affairs. The publication explicitly rejects AI-generated content…

Likely audience: AI researchers

1 shared topic

SubstackWeekly · last post 4 days ago

From recent posts: Jason Jorjani publishes a collection of essays analyzing Cold War history, philosophy of mind, and parapsychology through the lenses of film, literature, and covert operations.

Likely audience: Film scholars

1 shared topic

SubstackEvery two weeks · last post 3 days ago

Transdisciplinary essays and dialogues with paleontologist-futurist Michael Garfield exploring human-technology co-evolution and how to develop the playfulness we need to thrive in our age of accelerating weirdness.

Likely audience: AI researchers

1 shared topic

SubstackEvery two weeks · last post 3 days ago

Self-Empowerment Information and High-frequency communities

Likely audience: People seeking behavioral change

1 shared topic

SubstackMonthly or less · last post Sep 3, 2026

noted from my desk

Likely audience: Philosophers

1 shared topic

SubstackWeekly · last post 8 days ago

From recent posts: lcamtuf’s thing publishes a rotating mix of essays on philosophy of mind and artificial intelligence, short science fiction stories, and technical tutorials on electronics and mathematics. The publication targets…

Likely audience: Philosophy enthusiasts

1 shared topic