Mailinator
Paul Tima, a serial startup veteran with a PhD in computer engineering, built Mailinator about 13 years ago to scratch his own itch. He did not want to hand his real email address to websites like the New York Times just to read one article, so he built a receive-only service where anyone could type in an made-up address and an inbox would be created on the fly. Every inbox is public, and the inbox disappears from relevance once the reader is done with it.
Paul kept Mailinator as a side project for years while working at Google, LinkedIn, and four startups. Early on it ran on advertising, which he says paid for the servers. He later built ClickRouter, a sister site that routes clicks across several affiliate networks, and Mailinator's traffic became a test bed for it. Server costs stayed very low, reportedly around $400 per month, and the service ran on a single server for 13 years before being spread across several servers for redundancy.
Mailinator's brand grew with no real marketing. Users came to it to test email, and QA departments in particular started using it to test sign-up flows and welcome emails, since they could create thousands of inboxes instantly. They began asking for features, and Paul eventually built QA-focused functionality: an API to pull emails into integration tests, an upgraded UI, and private domains for paying customers. Today about 300 QA teams pay, with plans at $29 for a single user and $129 for teams. Roughly 15% of customers are on team plans.
The free product built its own brand and created the paid product on its own, which Paul describes as doing nothing on purpose. The site gets about 45,000 unique visitors and about 25,000 new public inboxes per day, and the main drawback is churn, which Paul estimates at 10 to 20 percent every couple of months. He has experimented with ads but says the business is mostly organic. Paul has declined venture funding because he did not see a path to a large outcome until the QA business appeared.
Mailinator is now a small, bootstrapped business with a team of three and a roughly $10,000 monthly SaaS base. Paul says he is now adding marketing, positioning, and product work to the engine, and he still treats the business as a side project he loves to code on.
- •A free, useful product that users discovered on their own built a brand that did the top-of-funnel work without a marketing budget.
- •Adding a paid tier only after QA teams asked for specific features meant the paid product matched demonstrated demand.
- •Because the service costs very little to run on a single server, a modest subscription base is highly profitable, which keeps the business sustainable without outside capital.
- •The shift from consumer tool to QA workflow tool turned a free utility into a product with recurring, integration-driven usage that is harder to abandon.
- 1.Launch a free version that solves a specific, frequent problem so users find it through their own needs.
- 2.Watch which user segments use the free product heavily and ask them what features they need.
- 3.Build the features those heavy users request, such as APIs and team or private options, and price them as a paid tier.
- 4.Keep infrastructure costs minimal so a small base of paying customers covers operations.
- 5.Track churn and free-to-paid conversion closely so you can improve the paid offering over time.
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Source quote for monthly revenue
you're making what about 10, 11 grand per month from this ass model
AI-extracted from the linked source. Monthly revenue can include one-time sales or donations, and may describe a later stage than the first-customer story.