Explore · The library

Every resource founders actually use, in one library.

The essays, videos, podcasts, books and tools behind every answer across eChai's hubs, from starting up to go-to-market, D2C, founder money and AI, each with a note on why it is here.

What founders use most, ranked by how many answers lean on it.

  1. Claude inside Excel, Word, PowerPoint and Outlook: ask about any cell, change assumptions without breaking formulas, build a... claude.com Tool · How Founders Use AI Claude for Microsoft 365 Anthropic
  2. A free Community plan and Professional at $36 an editor a month for a data workspace where analysts and agents query a... hex.tech Tool · How Founders Use AI Hex pricing Hex
  3. Google's own steps for 'Help me write': draft a new email or refine one for tone and clarity, and which Workspace or Google AI... support.google.com Guide · How Founders Use AI Draft emails with Gemini in Gmail Google Gmail Help
  4. A tested roundup of the specialist writing tools (Jasper, Anyword, Writer and others), each with who it suits and its price. zapier.com Article · How Founders Use AI The 6 best AI writing generators in 2026 Zapier
  5. The scaled content abuse policy in full, so you know where AI-assisted publishing crosses the line. developers.google.com Guide · How Founders Use AI Spam policies for Google web search Google Search Central
  6. What the $99-a-month toolkit tracks: prompts, brand performance and mentions in AI answers; no free trial. semrush.com Guide · How Founders Use AI AI Visibility Toolkit Semrush
  7. An AI writing and SEO assistant inside WordPress at $71.88 a year, for founders whose site runs on WordPress. rankmath.com Tool · How Founders Use AI Rank Math Content AI Rank Math
  8. Shows that Pika's free plan runs on credit packs with no commercial licence, and that Starter at $10 a month gives 600 credits... pika.art Tool · How Founders Use AI Pika pricing Pika
  9. Luma's studio for brand work starts at Plus, $30 a month for 10,000 credits with commercial use, and lists the credit cost of... lumalabs.ai Tool · How Founders Use AI Luma plans and pricing Luma AI
  10. Recraft makes vectors, icons and brand graphics; its pricing page says free-plan images are owned by Recraft, shown publicly... recraft.ai Tool · How Founders Use AI Recraft pricing Recraft
  11. An independent ranking of text-to-speech models by blind listener votes, led by Eleven v4, with each model's price per million... artificialanalysis.ai Tool · How Founders Use AI Text to Speech leaderboard Artificial Analysis
  12. Indian-language voices, Hindi, Bengali, Tamil, Hinglish and Indian English among them, with samples you can play before you build. sarvam.ai Tool · How Founders Use AI Bulbul text-to-speech API Sarvam AI
  13. Hands-on picks with prices: ElevenLabs as the all-in-one choice (from $6 a month), Hume Octave for designing a voice from a... zapier.com Article · How Founders Use AI The 8 best AI voice generators in 2026 Zapier (Miguel Rebelo)
  14. Google's free editor with more than 30 pro tools, film simulations and smart masking, with no in-app purchases. apps.apple.com Tool · How Founders Use AI Snapseed: Photo Editor (App Store) Google
  15. How to edit a photo in Google Photos by describing the change, and where the feature is available so far. support.google.com Guide · How Founders Use AI Use Ask Photos to search, edit and get assistance Google
  16. A free AI photo and video editor, an App Store Editors' Choice, with Generative Expand and paid extras as in-app purchases. apps.apple.com Tool · How Founders Use AI Adobe Lightroom (App Store) Adobe
  17. Hands-on picks with prices: Photoshop for full-featured editing (from $19.99 a month), Luminar ($129 perpetual licence), Canva,... zapier.com Article · How Founders Use AI The best AI photo editors in 2026 Zapier (Harry Guinness)
  18. YouTube's own specification: 3840 x 2160 for videos and 2160 x 3840 for Shorts, a 640-pixel minimum, JPG or PNG, the file-size... support.google.com Guide · How Founders Use AI Add custom thumbnails on YouTube YouTube
  19. How to test up to 3 titles or thumbnails in YouTube Studio; the one with the highest watch time is shown to everyone, and who... support.google.com Guide · How Founders Use AI A/B test titles and thumbnails YouTube
  20. Ideogram's image models, built to get the words in an image right; every plan, free included, can use all of them. docs.ideogram.ai Guide · How Founders Use AI Ideogram models Ideogram
  21. Music for ads, branded content and video, built in partnership with artists, labels and publishers; tracks are cleared for... elevenlabs.io Tool · How Founders Use AI Eleven Music ElevenLabs
  22. Free at 50 credits a day with no song downloads and no commercial rights; Pro at $8 a month billed yearly for 2,500 credits a... suno.com Tool · How Founders Use AI Suno pricing Suno
  23. Google's music model, making tracks from a 60-second clip to a full 3-minute song, in Google Flow Music and the Gemini app. deepmind.google Tool · How Founders Use AI Lyria 3.5 Google DeepMind
  24. Flow Music's core features are free; Google AI Plus, Pro and Ultra members get its Starter, Plus and Member plans. support.google.com Guide · How Founders Use AI Manage your AI credits and Google Flow Music plan Google

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The hubs

Starting Up Find an idea, validate it, build, and land your first customers. 1327 questions GTM Go-to-market, from breaking in to how the best teams do it. 379 questions D2C Building a direct-to-consumer brand, India-first. 512 questions Wealth Paying yourself, ESOPs, secondaries, and de-risking founder wealth. 165 questions How Founders Use AI How founders actually put AI to work, mapped topic by topic. 360 questions Glossary Plain-language definitions of the startup and VC terms you'll hit. 425 terms