Mailblock: The Cold Email Platform That Actually Makes Sense for Developers

The Problem We're Solving

You know the drill. Your startup needs cold email outreach, so you check the usual suspects. The quote comes back at $300+ per month before you've sent a single email. The interface looks like it was designed by someone who's never seen a code editor. And when you ask about their SDK? Crickets.

We've been there. As developers who live in terminals and think in APIs, we got tired of email marketing tools that felt like they were built for a completely different species.

What We Built Instead

Mailblock is cold email marketing that works like code. Think Stripe or Twilio, but for email campaigns. No more fighting with clunky interfaces or paying enterprise prices for basic functionality.

Core Features That Actually Matter

Proper Developer SDKs

• Native Python and Node.js libraries with real documentation

• Create campaigns, schedule emails, and track performance with function calls

• No more context switching between your codebase and admin panels

AI Email Writing That Doesn't Suck

• Context-aware AI that learns your tone and writing style

• Generates personalized content that actually sounds human

• Based on recipient data and campaign goals

Pricing That Won't Kill Your Runway

• Starts at $15/month with generous sending limits

• No setup fees or hidden costs for API access

• Priced like a developer tool, not enterprise software

Flexible Campaign Management

• One-off sends, multi-step sequences, transactional emails

• Full cold outreach automation with follow-ups

• All manageable through code or streamlined interface

Perfect For

Solo Founders bootstrapping B2B SaaS who need affordable email outreach without enterprise overhead.

Technical Teams who want email marketing integrated into their product logic.

Growth Engineers who need to A/B test sequences programmatically.

Indie Hackers who refuse to pay hundreds per month for basic functionality.

How It Works

Setup takes under 10 minutes. Import contacts via CSV, API, or database integration. Configure campaigns with function calls. Start sending immediately.

Built for extensibility. Add custom tracking, integrate with your analytics, build automation with webhooks. If you can code it, Mailblock handles it.

Early Access Perks

• Locked-in pricing that stays the same as we add features

• Free Pro plan month for first 100 teams

• Complete SDK access from day one

• Direct feedback line to influence our roadmap

Why We Built This

Every email solution was either prohibitively expensive, had terrible developer experience, or couldn't handle custom logic. We realized we weren't the problem. The tools were.

So we built what we actually wanted to use. Email marketing that thinks like code, scales like infrastructure, and costs like a developer tool.

Get early access and see what email marketing looks like when it's built by people who actually write code.

Built by developers, for developers. Finally.