Keplars

What is Keplars?

Keplars is an email sending service built specifically for developers, solo founders, and startup teams who need reliable transactional and marketing email delivery without complex SMTP setup. It supports OAuth-based sending via Gmail, Workspace, or Outlook, as well as custom domains with SPF, DKIM, and DMARC verification. The platform includes a visual email editor (Enceladas) that supports code, drag-and-drop design, and no-code editing in one interface. A sandbox environment lets teams validate email templates and triggers before going live without affecting deliverability reputation. Keplars charges by email volume rather than contact count, making it cost-efficient for high-sending-volume, lean teams.

How to use Keplars?

1. Sign up for free and connect your sending account via OAuth (Gmail, Google Workspace, or Microsoft Outlook) — no DNS or SMTP configuration required.
2. Generate an API key in the dashboard and add it to your application's environment variables.
3. Use the REST API or your preferred SDK (Node.js, Python, Go, PHP, etc.) to send transactional or marketing emails instantly.
4. Build and edit email templates visually using the Enceladas editor, or use React Email, Handlebars, or Pug templates in code.
5. Monitor delivery timelines, open events, and click tracking in real time from the dashboard, and use the sandbox to test flows before production.

Core Features

• OAuth Email Sending — Connect Gmail, Google Workspace, or Microsoft Outlook as a sending domain in seconds with no SMTP or DNS setup required.
• Transactional Email API — Send password resets, invoices, and notifications via a simple REST API with multi-language SDK support.
• Marketing Campaigns — Create, schedule, and track email campaigns with audience segmentation, subject line editing, and step-by-step campaign builder.
• Enceladas Email Editor — Build and edit templates using visual drag-and-drop, plain code, or no-code mode in a single unified interface.
• Delivery Analytics — Track every email from sent to opened to clicked with full timeline visibility and no scattered logs.
• Sandbox Environment — Test email templates, triggers, and flows in a controlled environment without affecting real users or your sending quota.
• Scheduled Emails — Schedule transactional or marketing emails for any future time with timezone support and dynamic template parameters.

Use Cases

• SaaS Onboarding Emails — Send automated welcome, activation, and onboarding sequences from your product domain with full delivery tracking.
• Startup Transactional Email — Replace complex SMTP configurations with a simple API to handle FA codes, password resets, and order confirmations reliably.
• Marketing Newsletters — Reach segmented user lists with scheduled campaigns built in the visual editor, with open and click reporting included.
• Multi-Client Agency Emailing — Manage and send emails for multiple client accounts using OAuth-connected domains under one Keplars dashboard.
• Pre-Production Email Testing — Validate templates, logic, and trigger conditions in the sandbox before deploying to production users.