Most cold email tools are either too basic for developers or too complex for results
We built the infrastructure developers need with the intelligence marketers want.
All standard features you expect: reliable sending, bounce handling, analytics, team management.
Smart template optimization, A/B test suggestions, personalization at scale.
Feature-rich API, webhooks, advanced automation with performance benchmarks.
Honest Differentiation
Standard Features
Everything you expect: Reliable sending, bounce handling, analytics, team management
Our Edge
AI Template Engine
Real before/after optimization with performance predictions
Performance SDK
45ms response times vs 120ms+ competitors
Advanced Automation
Visual workflow builder with conditional logic
Real Benchmarks, Transparent Data
Built by developers who got frustrated with existing solutions
Performance Comparison
Clean SDK Implementation
import { Mailblock } from '@mailblock/sdk';
const client = new Mailblock({
apiKey: process.env.MAILBLOCK_API_KEY
});
// Send with AI optimization
const result = await client.send({
to: 'prospect@company.com',
template: 'cold-outreach',
variables: { name: 'John', company: company },
aiOptimize: true // 23% better open rates
});
// Real-time performance metrics
console.log(result.deliveryTime); // 45ms avgSub-50ms response times or we'll optimize your implementation for free.
AI Assistant in Action
See how our AI transforms basic templates into high-performing campaigns
Hi {{ name }}, I saw your company and thought you might be interested in our product. We help companies like yours save time. Would you like to learn more?
{{ name }}, noticed {{ company }} is scaling fast. We helped similar companies reduce manual work by 40%. Worth a 15-min chat this week?
Join Our Beta Community
Be among the first to experience next-gen cold email infrastructure
Beta Benefits
Get Early Access
Beta starts March 2024 • No credit card required • Real product feedback welcome