AI researcher:

• Perplexity: Best for research
• ChatGPT: Best general
• Copilot: Best for code

Pick: Perplexity for search, ChatGPT for chat

SaaS founder:

• Stripe: Enterprise standard
• Paddle: Good for SaaS
• LemonSqueezy: Best for indie

Pick: LemonSqueezy for indie, Stripe for scale

PM expert:

• Linear: Fast, best UX
• Jira: Enterprise standard
• Asana: Good for teams

Pick: Linear for modern teams

Notes power user:

• Notion: All-in-one, cloud
• Obsidian: Local-first, plugins
• Roam: Bidirectional, expensive

Pick: Obsidian for power, Notion for ease