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Email Infrastructure, Simplified Under Few Clicks. Keplars powers transactional and marketing emails with full delivery visibility, sandbox testing, and seamless scale - with strong developer experience, enabling you to send emails in under 5 clicks, and usage-based pricing. 

A quick overview of what we’ve built:

OAuth Emails – Send product emails by simply connecting Google Workspace or Outlook. No custom domain required, and you can still control the sender name. Ideal for MVPs and early-stage products.
Custom Domains – Add your own domain when you’re ready, with full SPF/DKIM/DMARC support.
Unified Email Editor – Drag & drop with code editor all in one. HTML/MJML Editor
Sandbox Mode
Integrations – Works seamlessly with Vercel, React Email, Lovable, Firebase, Supabase, Zapier, Dodo Payments, and more.
Email WarmUp
Email Verification Tool
Marketing emails, campaigns
Email Automations
Fully Dynamic Pricing – Scale emails, domains, and features independently