Startups move fast. Your email should too.
Your users are waiting.
Don't spend your first week setting up domains, DNS records, SPF, DKIM, DMARC, and SMTP servers just to send a verification email. With OAuth Email Sending, Keplars lets you start sending emails securely using your Gmail or Outlook account, in minutes.
When you're ready to scale, switch to your own domain without changing your integration.
Built for founders, developers, and growing startups.
Launch today. Worry about infrastructure later.
Most startups don't fail because they picked the wrong email provider. They lose momentum because launching simple features turns into infrastructure work.
Before sending your first email, you're often asked to:
- Buy a domain
- Configure SPF
- Configure DKIM
- Configure DMARC
- Verify DNS
- Wait for propagation
- Generate SMTP credentials
- Debug why emails aren't sending
That's not building your product. That's configuring infrastructure.
With Keplars, connect your Google Workspace, Gmail, or Outlook account using OAuth and start sending production-ready emails immediately. When your startup grows, add your custom domain and continue using the same API. No migration. No code changes.
From idea to inbox in minutes.
Start with OAuth
- Connect Gmail or Outlook securely.
- Send emails instantly.
- Perfect for MVPs, hackathons, early customers, demos, and internal tools.
Grow with your own domain
- When your startup is ready, verify your domain with SPF, DKIM, and DMARC.
- Keep the same API.
- Keep the same templates.
- Keep the same integration.
Scale confidently
- Whether you're sending 100 emails a day or millions every month, Keplars grows with your business.
- No platform migration.
- No rebuilding.
One platform for every email your startup sends.
Why manage separate tools for transactional emails, newsletters, templates, analytics, and automation? Keplars brings everything together.
Transactional Emails
- Password resets
- OTP verification
- Invoices
- Receipts
- Notifications
Marketing Campaigns
- Product launches
- Newsletters
- Announcements
- Customer engagement
Email Builder
- Visual drag-and-drop editor
- HTML editor
- Reusable templates
- AI-powered generation
Developer Tools
- REST API
- SMTP
- Webhooks
- SDKs
- Sandbox Mode
Analytics
- Delivery status
- Opens
- Clicks
- Bounces
- Real-time logs
Built for startup speed.
Every decision in Keplars is designed around one question: will this help startups ship faster?
Less infrastructure. More shipping.
Why startups switch to Keplars
| Traditional Email Setup | Keplars |
|---|---|
| Buy a domain first | Start with Gmail or Outlook |
| Configure DNS before sending | Send immediately with OAuth |
| Manage SMTP credentials | Secure OAuth authentication |
| Multiple email tools | One unified platform |
| Separate transactional & marketing providers | Everything in one place |
| Rebuild when you scale | Same API from MVP to enterprise |
| Contact-based pricing | Usage-based pricing |
Built for developers. Loved by founders.
Developers love Keplars because it removes infrastructure complexity. Founders love Keplars because it helps them launch faster. Everyone wins because customers receive reliable emails from day one.
Your startup has bigger problems than email infrastructure.
Spend your time building features, talking to customers, and growing your business. We'll take care of the emails.
