Keplars is an email infrastructure platform designed to simplify how teams send, manage, and understand emails across both transactional workflows and marketing campaigns.

Most email tools require complex setup, fragmented workflows, or offer limited visibility. Keplars is built to provide a more straightforward approach by combining flexibility, clarity, and control in a single platform.

Core Capabilities?

1. Transactional Emails Send product emails such as OTPs, notifications, alerts, and system updates using API, SMTP, or webhooks with fast integration and reliable delivery.

2. Marketing Emails Create and manage campaigns with audience targeting, scheduling, and real-time tracking within a unified workflow.

3. Full Delivery Visibility Understand exactly what happens to each email with detailed tracking for deliveries, opens, clicks, bounces, and timelines, rather than relying only on aggregated metrics.

Email Setup Options?

1. OAuth Emails Start sending emails instantly by connecting your Google Workspace or Outlook account. No custom domain setup is required, making it ideal for early-stage products and quick iterations.

2. Custom Domains Configure your own sending domain with full support for SPF, DKIM, and DMARC to maintain control over branding and deliverability as you scale.

3. Email Creation & Audience

a) Unified Email Editor (Enceladas) Build email templates using a combined drag-and-drop and code editor. This allows both developers and non-technical users to work within the same environment.

b) Audience Management Import contacts via CSV or add them manually. Organize audiences using tags and custom attributes to support flexible segmentation and targeting.

c) Sandbox Mode Test email flows safely without affecting real users or consuming sending limits.

d) AI-Powered Workflows

Agent Skills Keplars enables AI-driven email integration through Agent Skills. Developers can describe what they want, and their AI agent can generate working integration code, configure workflows, or set up webhooks.

e) Migration Support Easily migrate from providers such as Resend, Mailgun, SendGrid, or other email services. Agent Skills can handle endpoint selection, request formats, and integration updates automatically.

Integrations & Ecosystem?

Keplars integrates with modern development and product tools, including:

Vercel (available on Vercel Marketplace) Firebase Supabase React Email Lovable Webhooks for custom integrations

These integrations allow teams to connect Keplars seamlessly into existing workflows and infrastructure.

Platform Features?

Real-time delivery and engagement tracking Email reputation monitoring to improve deliverability Webhooks for delivery, open, click, bounce, and failure events Clean APIs designed for developer-first integration

Pricing?

Keplars uses a volume-based pricing model, charging per email sent rather than per contact. This ensures predictable costs and avoids pricing increases tied to audience size. Custom plans are available as usage grows.

Who It Is For?

Keplars is designed for startups, SaaS teams, developers, and marketing teams that want a simpler, more transparent approach to email infrastructure. It is particularly useful for teams that need both transactional and marketing capabilities without relying on multiple tools.