What is Keplars used for?

Keplars is email infrastructure for product teams, covering transactional and marketing sends, delivery tracking, sandbox testing and warmup. It is a good fit for sending app notifications and password resets, and running marketing campaigns from the same platform.

How much does Keplars cost?

Paid plans for Keplars start at $1 per month, and there is no free plan. A free trial is available.

Is Keplars open source?

No. Keplars is proprietary (closed-source) software and can't be self-hosted. In the Email Marketing category, open-source options include Plunk, Postal and Dittofeed.

What are some alternatives to Keplars?

Keplars competes with Resend, Postmark and SendGrid.

Keplars: features, pricing and alternatives

About Keplars

Keplars is an email sending platform for developers and product teams. It handles transactional messages such as password resets, order confirmations and alerts through a REST API, an SMTP relay, webhooks and official SDKs, and it also runs marketing campaigns that you design, schedule and send to an audience. Delivery, open, click and bounce events are tracked in real time.

You can send through your own verified domain, or connect a Gmail or Microsoft 365 account over OAuth and send with the sender reputation you already have, with no SMTP relay or DNS setup. DKIM, SPF and DMARC records are configured automatically, and mailbox warmup is included. A unified editor supports drag-and-drop blocks and raw code, and can import Canva or Figma designs as email templates.

Further features include sandbox testing before real sends, automations for customer journeys, more than 100 native integrations with CRMs, e-commerce platforms and developer tools, and an MCP server that lets AI assistants send email. Support is offered around the clock on every plan. Keplars is a hosted service with a short free trial and a free plan.

Key features

REST API, SMTP relay, webhooks and SDKs
Send via Gmail or Microsoft 365 over OAuth
Automatic DKIM, SPF and DMARC setup
Real-time delivery, open, click and bounce tracking
Drag-and-drop and code email editor
Canva and Figma design import
Sandbox testing before sending
MCP server for AI assistants

Good fit for

Sending app notifications and password resets
Running marketing campaigns from the same platform

Tags: email; transactional-email; smtp; email-api; marketing-email; deliverability; developer-tools; mcp

Keplars: questions and answers

What is Keplars used for?: Keplars is email infrastructure for product teams, covering transactional and marketing sends, delivery tracking, sandbox testing and warmup. It is a good fit for sending app notifications and password resets, and running marketing campaigns from the same platform.
How much does Keplars cost?: Paid plans for Keplars start at $1 per month, and there is no free plan. A free trial is available.
Is Keplars open source?: No. Keplars is proprietary (closed-source) software and can't be self-hosted. In the Email Marketing category, open-source options include Plunk, Postal and Dittofeed.
What are some alternatives to Keplars?: Keplars competes with Resend, Postmark and SendGrid.