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All-in-One Transactional Email for SaaSAuth, Billing & Agent Ready

The transactional email API built specifically for SaaS from MVP to millions of users

Power user onboarding, magic links, Stripe billing receipts, security alerts, and autonomous AI agents from a single unified API. 100% DKIM signing, low latency, and 6,000 free sends every month.

3,000 emails/month freeZero credit card requiredSub-20ms edge latency
202 Accepted
Dispatch Latency
Queued durably before any provider call
SPF · DKIM · DMARC
Authentication
Aligned on every send
6,000/mo
Free Tier
Custom domain DKIM
Developer Ergonomics

Drop into your application in under 60 seconds

Native typed interfaces with zero unnecessary dependencies. Built for standard fetch and modern edge runtimes.

$npm install sadasend
saas-pipeline.ts
typescript
TYPESCRIPT
import { SadaSend } from 'sadasend';

const sadasend = new SadaSend(process.env.SADASEND_API_KEY!);

// Unified SaaS email dispatch for authentication, billing, or alerts
export async function sendSaasNotification(params: {
  to: string;
  type: 'welcome' | 'invoice' | 'alert';
  subject: string;
  html: string;
}) {
  return await sadasend.emails.send({
    from: 'Platform <noreply@yourdomain.com>',
    to: params.to,
    subject: params.subject,
    html: params.html,
    tags: [params.type, 'saas-core']
  });
}

Unified SaaS transactional email pipeline handling onboarding, billing receipts, and security notices with clean tag categorization.

Core Infrastructure

Engineered for high deliverability and zero incident risk

Every layer from edge connection pooling to per-key rate limits is designed to keep critical transactional dispatches fast, reliable, and contained.

Unified SaaS Communication Pipeline

Manage magic links, password resets, onboarding emails, invoice receipts, and notification digests through one clean API.

Native AI Agent Tool Calling

Equip autonomous coding and customer service AI agents with safe email capabilities via 10 hosted Model Context Protocol tools.

Pre-Warmed Reputation Pools

New SaaS projects get instant high deliverability on pre-warmed IP pools without waiting weeks for manual IP warm-up.

Staging Sandbox & Allowlists

Protect development environments from emailing real customers by applying recipient allowlists to test API keys.

Multi-Tenant Domain Management

Easily verify multiple corporate domains and subdomains from a single dashboard with automated DNS instructions.

6,000 Free Monthly Sends

Launch your SaaS MVP at zero cost with full API features, custom domain DKIM, and webhook monitoring included.

Architectural Comparison

SadaSend vs Legacy Developer Email Providers

Why modern SaaS founders choose SadaSend over legacy providers with complex setups and outdated developer tools.

Feature & CapabilitySadaSendLegacy Developer Email Providers
Native AI Agent Guardrails & MCPNone (Basic REST API only)
Dedicated IP Surcharges$0 (Smart pools included)$89.95/month extra per IP
Synchronous API Error FeedbackSilent drops with 202 Accepted
Staging Recipient Allowlists
React Email Template Support
Permanent Free Tier with DKIM6,000 sends foreverTrial expiration or 100/day limit
Forever Free Tier
Transparent Economics

Start with 3,000 emails every month at zero cost

No artificial paywalls on security. Unlike legacy providers that reserve recipient allowlists or dedicated IP pools for high enterprise tiers, every SadaSend account receives full safety controls from day one.

3,000 dispatches monthly forever with zero credit card
All safety gates, allowlists, and velocity limits included
Scale seamlessly: Starter ($12/mo for 10k), Pro ($19/mo for 50k), Scale ($79/mo for 250k)
Free Developer Plan
$0 / mo

No credit card required

Create Free AccountCompare all paid plan tiers
Frequently Asked Questions

Everything you need to know about SaaS email API

Clear, transparent answers on deliverability, API authentication, and rate limits.

Yes. SadaSend supports multiple sending domains and scoped API keys, making it ideal for multi-tenant architectures where different workspaces send from distinct subdomains.
Technical Deep Dives

Related developer guides and architectural tutorials

Explore step-by-step production implementation blueprints, benchmarks, and protocols.