Skepticism

Perplexity v2.2

AI-powered answers to any question, instantly.

Search

Open

55,246 www.perplexity.ai

Loved the search engine ideas.

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🇺🇸 United States

Released 1y ago

91,636

709

4.2

Findsight

Compare non-fiction ideas from multiple sources.

Learning

Open

Great idea, but does not find what you are looking for-about the same as Google Scholar

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Released 3y ago

100% Free

68,004

704

3.2

AskBooks

Summarizes books and offers author insights via chat.

Q&A from books

Open

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Released 3y ago

Free + from $4.80/mo

26,235

145

2.5

Philosophy

Chat with history's greatest thinkers

Philosophical conversations

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Alexandru Bostina

🛠️ 2 tools 🙏 10,263 karma

May 23, 2025

@Philosophy

Seems to be working quite well as of today. It was most likely a temporary issue. Give it another go!

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Released 3y ago

100% Free

12,748

91

3.5

I Doubt News

AI-powered news analysis and fact-checking platform

News

Open

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Released 3y ago

100% Free

8,255

71

5.0

Cogmi

Track your brain's peaks to work smarter and reduce burnout.

Cognitive productivity

Open

I’ve been playing with cogmi for a week and it’s really cool what insights it’s giving me about performance. Usually I don’t even think about when to stop, but now there’s some data to focus on. It’s like keeping tabs on circardian rhythm but for brain performance.

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Released 1y ago

Free + from $5.99/mo

2,792

56

3.2

Qualifyed.AI - Lookalike Audiences

Boost ROAS with AI-powered audience targeting

Lookalike audiences

Open

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🇺🇸 United States

Released 3y ago

From $1162/mo

3,332

41

Sourcer AI

AI-powered fact-checking for instant source credibility

Fact checking

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1,298 sourcerai.co

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Released 1y ago

Free + from $5/mo

2,621

39

Debate Devil

Toughen up your hypothesis with AI

Debates

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Released 3y ago

Free + from $8.99/mo

3,794

38

4.0

Hubble.team

Gather in-product feedback from real users.

Customer feedback analysis

Open

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🇺🇸 United States

Released 3y ago

No pricing

5,936

26

Conspiracy Theories

Unravel conspiracy theories with AI-powered analysis.

Conspiracy analysis

Open

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Released 1y ago

100% Free

171

23

18

Scholantic

The intelligent research assistant for academic writing.

Academic writing

Open

Very convenient and easy to use!

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Released 7mo ago

Free + from $30/mo

1,041

18

4.5

theMultiplicity.ai

Use multiple AI models at once to see where they agree/disagree

LLM comparison

Open

Multiple models reviewing content is so helpful because we can better understand when there's a strong case for X, or divergences about Y, and ultimately get a more full understanding because of that. Great work!

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Released 5mo ago

Free + from $5/mo

1,377

18

5.0