Introducing AISend: AI-Powered Email API
Why we built AISend
Email is the backbone of every application. Password resets, welcome emails, receipts, notifications — they all depend on reliable delivery. Yet most email APIs treat every send the same way: accept the request, pass it to a single provider, hope it lands in the inbox. We thought there was a better way. AISend applies machine learning to every aspect of email delivery — from choosing the best provider for each recipient, to optimizing send timing, to scoring content before it leaves your server. We built AISend because we were tired of building the same email infrastructure over and over at every company we worked at. Retry logic, provider failover, deliverability monitoring — this is undifferentiated heavy lifting that every engineering team rebuilds from scratch.
The problem with traditional email APIs
Traditional email APIs are essentially a thin layer over a single email provider. When that provider has issues, your deliverability drops. When a recipient's domain is tricky, you have no fallback. There's no intelligence in the pipeline — just a queue and a prayer. Developers end up building their own retry logic, provider failover, and deliverability monitoring. That's infrastructure you shouldn't have to maintain. We've seen teams spend weeks debugging why their password reset emails aren't reaching Gmail users, only to discover their single provider had a temporary reputation issue. With multi-provider routing, that problem disappears entirely.
How AISend is different
AISend routes each email through the best available provider — AWS SES, Postmark, or SMTP — based on real-time deliverability data. Our AI scores your email content before sending and suggests improvements. Send time optimization ensures your emails arrive when recipients are most likely to engage. And our API is designed to be Resend-compatible, so migration takes minutes, not days. The key insight is that no single email provider is the best for every email. SES might have better deliverability to Gmail, while Postmark excels at corporate domains. AISend makes this decision automatically on every send, using data from millions of delivery attempts.
Developer-first, always
We're developers building for developers. Our REST API is clean and predictable. SDKs are available for Node.js, Python, Go, and Ruby. The dashboard shows you what matters — deliverability metrics, not vanity analytics. And the free tier gives you 3,000 emails per month with all AI features included. No credit card required. We designed the API to be familiar to anyone who's used Resend, SendGrid, or Postmark. Four fields to send an email: from, to, subject, html. That's it. No configuration objects, no template IDs, no batch processing complexity. Just send.
What's next
We're just getting started. Our roadmap includes AI-powered template generation from natural language prompts — describe what you want and get a responsive HTML email. Advanced analytics with deliverability forecasting will help you predict and prevent issues before they happen. Webhook-driven automation workflows will let you build complex email sequences without writing routing logic. We're also working on a React Email integration that lets you build templates with React components and deploy them directly through AISend. Sign up today to start sending smarter emails, and follow our blog for product updates.
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3,000 emails/month free. No credit card required.