New: Mailbox Warmup is now available

Build products. Not email infrastructure.

Don't waste your weekend configuring SMTP servers, DNS records, and email authentication. With Keplars, start sending emails in minutes using Gmail or Outlook with OAuth, then switch to your own domain whenever you're ready.

Launch faster. Stay focused. Ship more.

Built for people who ship.

You don't have a DevOps team. You don't have an email engineer. You probably don't even have a support team yet. You just want to send:

Welcome emailsOTPsPassword resetsMagic linksInvoicesNewslettersProduct updates

...without spending days on infrastructure. That's exactly why we built Keplars.

Your weekend shouldn't end with DNS errors.

Most email providers expect you to:

  • Buy a domain
  • Configure SPF
  • Configure DKIM
  • Configure DMARC
  • Generate SMTP credentials
  • Verify everything
  • Debug why emails aren't sending

By the time you're done, you've forgotten what feature you were actually building.

Keplars lets you start with OAuth Email Sending using Gmail or Outlook. No custom domains. No DNS configuration. No SMTP setup. Just connect, build, and ship.

Start simple. Scale whenever you're ready.

Your first customer doesn't care how your email infrastructure works. They only care that:

Their OTP arrives.
Their invoice arrives.
Their password reset works.

Start with OAuth. When your product grows, verify your own domain and continue using the exact same API. No migration. No rebuilding. No surprises.

One platform instead of five.

Most indie makers end up paying for an email API, a marketing platform, a template builder, analytics, and automation. Keplars combines everything into one simple platform.

Transactional Emails

  • Password resets
  • Magic links
  • Invoices
  • Notifications

Marketing Campaigns

  • Launch emails
  • Newsletters
  • Product updates
  • Announcements

Visual Email Builder

  • Drag & Drop
  • HTML Editor
  • Reusable Templates
  • AI-powered Generation

Developer Tools

  • REST API
  • SMTP
  • Webhooks
  • SDKs
  • Sandbox

Analytics

  • Delivery
  • Opens
  • Clicks
  • Activity
  • Real-time Logs

Built for makers.

Whether you're building with modern frameworks or established stacks, Keplars fits into your stack in minutes.

Next.jsReactFlutterNode.jsSupabaseFirebaseLaravelRailsDjango

Because infrastructure shouldn't slow down great ideas.

Spend your money on growth. Not unnecessary software.

As an indie hacker, every dollar matters. That's why Keplars uses transparent usage-based pricing.

  • No contact limits.
  • No expensive marketing add-ons.
  • No hidden enterprise upgrades.
  • Pay for what you send. Nothing more.

Ship faster with features that matter.

OAuth Email Sending

Start sending emails without DNS or SMTP.

Transactional + Marketing

One platform. No switching tools.

Sandbox Mode

Test everything before production.

Visual Email Builder

Build beautiful emails without touching code.

APIs, SMTP & SDKs

Integrate with your stack in minutes.

Real-time Analytics

Know exactly what happens after every send.

Why indie hackers choose Keplars

OthersKeplars
Configure DNS before sendingStart instantly with OAuth
Multiple email productsOne unified platform
Expensive contact-based pricingUsage-based pricing
Separate marketing toolsBuilt in
Migrate laterGrow on the same platform
Complex onboardingLaunch in minutes

Built for founders who move fast.

Whether you're launching your first MVP, your tenth SaaS, or your next AI product, Keplars gives you the email infrastructure to move faster, not slower.

Your next product deserves better than weekend-long email setup.

Launch your emails today. Scale tomorrow. Never rebuild your email infrastructure.

Featured On

SaaS WheelListed on Turbo0Featured on LaunchIgniterFeatured on Findly.toolsKeplars - Email Infrastructure for Modern Product Teams | Product HuntFeatured on Twelve ToolsKeplars on Nick LaunchesFeatured on ListBulbFeatured on Versily - Keplars