Inbox Archive
Real marketing emails from real brands, with the ESP and tracking tech detected
Analytics·Marketing·Communication
About
Inbox Archive is a free, searchable gallery of real email marketing campaigns: 3,500+ emails from 145 brands, captured straight from the inbox and rendered as actual HTML, not screenshots.
Everything is organized by brand, campaign type (welcome, promotion, abandoned cart, product launch, and more), and industry. On top of the archive itself, each email carries detected data you won't find in other galleries: the ESP the brand actually sends with (Klaviyo, Braze, Salesforce Marketing Cloud, Mailchimp), the tracking and personalization tech embedded in the email, and any live promo codes.
There's also an insights page with aggregate stats measured from real sends rather than surveys: ESP market share, campaign-type mix, and tracking prevalence across every archived brand.
Use it as a swipe file when you're designing your next campaign, or as competitive research when you want to know exactly what stack a brand runs on. No signup needed to browse.
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FounderPlaybooks.
What other founders did to grow.
2722 dispatches from hundreds of founders, pulled from the week's best podcasts.
The way I see competition is I think it's actually a net positive for us. What it does is help more people realize that this problem is real, educate the market, get more people to use apps. There's 5 billion people in the world with a smartphone and probably a few dozen million that have ever used a screen time app.
Competition is a net positive when you have brand — it educates the market you're trying to win
Schlenker reframes category competition as market-education rather than market-stealing. With only tens of millions of users having ever tried a screen time app out of 5 billion smartphone owners, the primary challenge is category creation, not competitive displacement. Every copycat app that launches runs ads and prompts conversations that expand the category's reach. Opal's brand, retention, and soul mean that users who try inferior alternatives and become dissatisfied will find Opal through word-of-mouth.
The two areas — the biggest mistakes: under-trying to understand the size of the market you're addressing… and not understanding what the ongoing costs of an app are going to be… if I get any amount of volume I'm suddenly spending thousands of dollars a month supporting this app.
Apps Fail for Two Reasons: Market Too Small or Ongoing Costs Not Modeled
David's post-mortems on 50 failed apps consistently trace back to two errors: an audience too niche to sustain a business, and backend costs that scale faster than revenue. Subscription infrastructure didn't exist for most of his weather app's life — so what should have been a SaaS was inadvertently running as a charity.
There's a play for whatever you're stuck on.
Read all 2722 playbooks