The modern SparkPost alternative with transparent pricing & zero contract lock-in

import { SadaSend } from 'sadasend';

// Modern high-throughput transactional client
const client = new SadaSend(process.env.SADASEND_API_KEY!);

export async function sendHighVolumeDigest(recipients: Array<{ email: string; summary: string }>) {
  // Batch dispatch with automated connection pooling and rate balancing
  const dispatches = await Promise.all(
    recipients.map((user) =>
      client.emails.send({
        from: 'updates@yourdomain.com',
        to: user.email,
        subject: 'Your Weekly Activity Digest',
        html: `<p>Here is your weekly activity summary: ${user.summary}</p>`,
        tags: ['weekly-digest', 'batch-send']
      })
    )
  );

  console.log(`Successfully dispatched ${dispatches.length} emails`);
  return dispatches;
}