Maileroo email delivery, $3K a month, self-reported in 2023: API-first

Maileroo is an email delivery platform for sending transactional and marketing messages through SMTP relay and Email API. Its $3K a month was founder-reported on the Indie Hackers product page (not independently verified), as of December 2023.

What it actually sells

Maileroo sends transactional and marketing emails through SMTP relay and Email API. Its REST API supports transactional and bulk email sending, dynamic templates, and account automation. The platform also includes real-time tracking for deliveries, opens, clicks, and bounces, with a full event timeline for any message.

How it charges

Maileroo provides 3,000 free emails a month, then plans from $10. The site presents the free allowance and paid plans as the pricing structure for its email delivery service.

Where customers come from

The site points to official SDKs and clear developer documentation for implementing the Maileroo Email API. It also offers SMTP integration, an official WordPress plugin, and One-Click Cloudflare Setup. Customer support signals include developer documentation, a help center, and a Discord community.

What stands out

Maileroo combines transactional and marketing email delivery with centralized management for verified sending domains, API keys, webhooks, and applications. Its site highlights European data residency across four countries: Germany, the Netherlands, Finland and France. The site also shows 100M+ emails sent monthly, 1,000+ happy customers, and 10K+ active users.

From the official site

Startups, agencies, and growing businesses stay with Maileroo because the support is real, the pricing is honest, and the infrastructure holds up.

Send transactional and bulk email through our REST API, render dynamic templates, and automate anything in your Maileroo account

Excerpts from the official website, fetched October 1, 2026.

Where it sits in the data

Maileroo's $3K a month is higher than 53% of the 6,604 projects with founder-reported monthly revenue in our dataset; the median across them is $2K. Snapshot: 2026-09-30. The dataset only covers founders who chose to publish their numbers, so it leans toward businesses that work; use it for scale, not as an average.

Currency

All figures are in US dollars as published. A rough yuan or euro conversion is not applied here because prices, taxes and acquisition costs differ by country.

Could you build something like this?

In my view, demand would come from startups, agencies, developers, and growing businesses that need transactional and marketing email delivery. The buyer would need SMTP relay access or an API, developer documentation, SDKs, integrations, and a way to track delivery events.

Another view is that distribution could come through developer documentation, SDKs, WordPress and Cloudflare integrations, and community support. Building it would require reliable email delivery, support for technical users, integration work, and attention to deliverability and data-residency requirements.

Verdict: Needs real work.

One thing to take from it

Maileroo’s product combines email delivery, developer integrations, event tracking, centralized account management, and support channels. The site reports 5.0 ratings on Capterra and Product Hunt, alongside 100M+ emails sent monthly, 1,000+ happy customers, and 10K+ active users.

Sources

Maileroo official website, fetched October 1, 2026
Maileroo pricing page, fetched October 1, 2026
Maileroo about page, fetched October 1, 2026
Indie Hackers product page: revenue founder-reported on the Indie Hackers product page (not independently verified), as of December 2023

Revenue, team and start-cost figures are what the founder reported at the interview date, not current figures and not a prediction of what you will earn. Product and pricing facts come from the business's own website as checked on 30 September 2026. Method & sources · Disclosure