Capture – Capture screenshots, generate PDFs, scrape content, extract metadata, and automate browsers with one API.

Open-source email API designed for developers who want control over their email infrastructure. Built as a powerful alternative to AWS SES and Mailgun, offering both self-hosted and upcoming cloud solutions.

Key Features:

Clean REST API for sending HTML/plain text emails with attachments and custom headers
Automated deliverability with DKIM, SPF, bounce handling, and suppression management
Real-time webhooks for delivery events, bounces, and domain verification
Multi-domain support with enforced DKIM signing for maximum trust
Project isolation with separate domains, keys, and webhooks per project
Comprehensive logging with 30-day retention and full SMTP traces

Self-Hosting Benefits:

Fully open-source under AGPL-3.0 license - deploy anywhere with zero vendor lock-in
Built-in DNS server automates forward records, MX, SPF, and DKIM setup
Horizontal scaling with Docker Swarm support
Enterprise licensing available with priority support and SLAs
Native monitoring with Prometheus and Grafana integrations

Categories:

Email Platforms

Capture – Capture screenshots, generate PDFs, scrape content, extract metadata, and automate browsers with one API.

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Hyvor Relay

Self-hosted email API alternative to AWS SES & Mailgun. Open-source AGPL-3.0 with enterprise features, automated deliverability, and cloud version coming 2026.

Open Source Alternative to:

Resend

SendGrid

Mailgun

AWS SES

Visit Hyvor Relay Host with Stellar Hosted

Openlane

Open-source, developer-first platform for automated compliance, risk management, and built-in Trust Center.

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Key Features:

Clean REST API for sending HTML/plain text emails with attachments and custom headers
Automated deliverability with DKIM, SPF, bounce handling, and suppression management
Real-time webhooks for delivery events, bounces, and domain verification
Multi-domain support with enforced DKIM signing for maximum trust
Project isolation with separate domains, keys, and webhooks per project
Comprehensive logging with 30-day retention and full SMTP traces

Self-Hosting Benefits:

Fully open-source under AGPL-3.0 license - deploy anywhere with zero vendor lock-in
Built-in DNS server automates forward records, MX, SPF, and DKIM setup
Horizontal scaling with Docker Swarm support
Enterprise licensing available with priority support and SLAs
Native monitoring with Prometheus and Grafana integrations