Elastic Email

The REST API covers email sends, campaign management, contact list management, suppression lists, and engagement tracking. Agents can send transactional emails with attachments, template substitution, and tracking parameters. The API follows standard REST conventions with JSON request bodies and clear response structures for success and error cases.

Elastic Email is a cost-focused email delivery provider offering transactional email, marketing campaigns, and list management through a REST API. Its pay-per-email pricing model — without monthly minimums tied to subscriber counts — makes it economical for applications with variable or high-volume sending needs where per-email cost matters more than premium features. For agents sending high-volume transactional emails at minimal cost, Elastic Email's straightforward sending API and competitive pricing deliver the core capability.

Authentication uses API keys for the REST API. Keys are scoped to account-level access without granular permission tiers — sending and management operations share the same key. Teams should implement appropriate secret management for API keys and limit key distribution to services that need it.

Documentation covers the sending API and account management endpoints. The API reference is functional for basic integration work. Teams evaluating Elastic Email primarily on cost should verify deliverability rates against their specific recipient domains and sending patterns — deliverability quality varies by provider and affects the total cost of email delivery when accounting for re-send rates.

Reliability is appropriate for a volume email provider. Teams with mission-critical transactional email delivery requirements (password resets, payment confirmations) should evaluate whether Elastic Email's SLA commitments match the availability requirements, as premium providers like Postmark specifically target high-reliability transactional use cases.