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.
- Loomer is one of the most cited independent Meta ads practitioners, and this piece turns the abstract 50 events rule into... Jon Loomer Digital Article · D2C Facebook Ads and the Learning Phase Jon Loomer
- Shopify updates this cost breakdown against live data on a rolling basis, so the CPC and CPM benchmarks and the learning phase... Shopify Article · D2C What Facebook Ads Cost in November 2025 Shopify
- Brings in a practitioner's rule (start with roughly $1,000 for low ticket products, more for high ticket) rather than a flat... HubSpot Article · D2C How to Plan Your Facebook Ads Budget (And Make The Biggest Impact) HubSpot
- A long running, frequently updated benchmark piece with cost per click broken out by industry, so you can sanity check whether... WordStream Article · D2C How Much Do Facebook Ads Cost? (+9 Ways to Stretch Your Budget) WordStream
- Real bootstrapped founders comparing notes on their actual starting numbers, a useful gut check against the agency scale advice... Indie Hackers Thread · D2C How much should I be spending on ads? Indie Hackers
- Sharma advises dozens of DTC brands and states plainly that you need a testing fund you're prepared to lose before you touch... Sharma Brands Newsletter · D2C 7 Things to do After Launching Your Brand Nik Sharma
- Straight from Meta: explains exactly how Advantage+ detailed targeting expands past your chosen interests, and where it does... Meta Business Help Center Article · D2C About Advantage+ Detailed Targeting Meta
- Documents Meta's own mid-2025 move to fold many interest categories into broader groupings, the exact policy shift pushing... Meta Business Help Center Article · D2C Updates to Detailed Targeting Meta
- Jon Loomer actually ran the A/B test rather than repeating platform talking points, so this is one of the few sources with... Jon Loomer Digital Article · D2C Test Results: Advantage+ Audience vs. Detailed Targeting and Lookalikes Jon Loomer
- A practical, opinionated playbook for what to actually set (and skip) in Ads Manager today, from someone who has been publicly... Jon Loomer Digital Article · D2C How to Approach Meta Ads Targeting Now: A Detailed Guide Jon Loomer
- Foxwell Digital runs Meta spend for large DTC brands, and this explains the specific mechanism (declining First-Time Impression... Foxwell Digital Article · D2C Meta Broad Targeting: Why Skipping Exclusions Works Foxwell Digital
- An independently run test, not a Meta-sponsored case study, that puts Advantage+ Audience next to interest targeting inside the... Search Engine Land Article · D2C Testing Meta's AI-powered Advantage+ Targeting: What We Learned and What to Expect Search Engine Land
- Triple Whale sits inside thousands of DTC ad accounts as an analytics tool, so this is written specifically for ecommerce... Triple Whale Article · D2C Your Creative Is Now Your Targeting: How AI-Driven Delivery Flipped the Script on Ecommerce Advertising Triple Whale
- AdExchanger is required reading in ad tech for a reason: this piece pushes back on the 'broad always wins' consensus and lays... AdExchanger Article · D2C For Meta Marketers, Automation Isn't Always The Advantage (But It's Complicated) AdExchanger
- Meta's own India-facing newsroom post on how Indian brands are using its automated ad tools, useful for a direct read of Meta's... Meta Newsroom (about.fb.com) Article · D2C Helping Indian Brands Grow Their Cross Border Business With Meta Ad Tools Meta
- Inc42 is India's primary startup trade press, and this piece talks directly to Indian D2C founders about the exact symptom, ad... Inc42 Article · D2C Conquering Ad Fatigue: How D2C Startups Can Revamp Their Facebook Ad Strategy Inc42
- The single most India-specific twist on this question: with most orders on COD and a large share coming back as RTO, an Indian... Smartbiz Help Center Article · D2C How to Reduce Return to Origin (RTO) Using Meta Events Smartbiz Help Center
- A named, credible Indian D2C brand and its actual targeting choice, a useful real-world data point on when a narrower,... DeltaX Report · D2C Clear Skies Ahead: Mamaearth's 102% ROAS Through Weather-Targeted Marketing DeltaX
- Storyboard18 is a leading Indian ad-industry publication, and this covers a homegrown tool feeding verified Indian checkout... Storyboard18 Article · D2C GoKwik Launches Kwik Ads to Boost D2C Performance Marketing Storyboard18
- Walks through the exact formula a founder needs to compute their own break-even number before comparing it to anyone else's... Triple Whale Article · D2C Breakeven ROAS: Definition, Formula & Why It's Essential Triple Whale
- Taylor Holiday's agency is the most quoted voice in DTC for reframing ROAS around profit, useful pushback against chasing a... Common Thread Collective Article · D2C Why ROAS Is a Terrible Ecommerce Metric + 3 That Actually Matter Common Thread Collective
- Straight from Meta: the ground truth on how the number a founder stares at every day is computed, and where it can be soft. Meta Business Help Center Article · D2C Purchases ROAS (Return on Ad Spend) Meta
- Explains precisely why the number a founder sees on Meta's own dashboard is not the number that should decide whether ads are... Polar Analytics Article · D2C Why Your ROAS Is Wrong: The Hidden Gaps in Shopify Attribution Polar Analytics
- A sharp, practitioner-written essay that takes the margin argument a level deeper than most agency blog posts: down to the SKU. Jordan Glickman Essay · D2C What Contribution Margin by SKU Reveals That ROAS Hides Jordan Glickman
The hubs
Starting Up
Find an idea, validate it, build, and land your first customers.
GTM
Go-to-market, from breaking in to how the best teams do it.
D2C
Building a direct-to-consumer brand, India-first.
Wealth
Paying yourself, ESOPs, secondaries, and de-risking founder wealth.
How Founders Use AI
How founders actually put AI to work, mapped topic by topic.
Glossary
Plain-language definitions of the startup and VC terms you'll hit.
eChai Partner Brands
The partnership →