Mailblock Reviews — Discover what people think of this product.

Mailblock Cold email that works like code — built for developers, founders, and technical growth teams.

🚀 Developer-First Cold Email Platform Mailblock is a cold email platform designed for builders who'd rather write code than wrestle with clunky, overpriced marketing tools. Born out of frustration with rigid platforms and bloated CRMs, Mailblock gives you full control through clean SDKs, powerful APIs, and AI-assisted content — without the fluff or the enterprise price tag.

Whether you're a solo founder launching a B2B SaaS or a technical marketer running data-driven campaigns, Mailblock puts cold outreach where it belongs: inside your stack.

🔧 Built for Developers Forget drag-and-drop builders and generic templates. Mailblock gives you:

Real SDKs (Python, Node.js & more)

Native campaign control from your codebase

Customizable logic, triggers, and tracking

Fast integration with your existing stack

Everything works the way you expect — no layers, no keyframes, no CSV juggling.

🤖 AI-Powered Writing Need to write hundreds of personalized emails? Mailblock’s built-in AI drafts context-aware, human-sounding messages based on your recipient data and tone preferences. It helps you move fast without sounding robotic.

💸 Affordable, Startup-Friendly Pricing Stop paying $300/month before you even get replies. Mailblock starts at just $15/month, with generous limits, no hidden fees, and all developer features included from day one.

💡 Who It’s For Indie Hackers: Automate outreach without spending your runway.

Technical Growth Teams: Run programmable campaigns tied to product data.

Solo Founders: Keep marketing nimble, without hiring help.

SaaS Startups: Personalize at scale without building your own infrastructure.

⚙️ Key Features Full-featured SDKs for seamless dev integration

AI-assisted email generation

Multi-step drip campaigns & transactional flows

Flexible import via API, CSV, or DB integration

Extensible with webhooks and tracking pixels

Transparent docs, rate limits, and error messages

🧪 Still in Early Access Mailblock is live in beta, and we’re shipping fast. Early users get locked pricing and a free month on the Pro plan. We're here to build in public, improve quickly, and stay close to our community.

✉️ Ready to Build Better Outreach? Mailblock is email marketing for people who think in code. If your current tool feels like it's working against you — it probably is.