Sending Transactional Emails Shouldn't Feel Like Rocket Science.
We built Keplars to make it effortless.
Our Mission
At Keplars, we believe sending transactional emails should be effortless - not a technical obstacle course.
We exist to help developers, startups, and businesses communicate instantly, reliably, and without the painful overhead of DNS setups, domain verification, or complex email infrastructure.
We're building the most seamless transactional email experience in the galaxy so you can focus on your product, not your email configuration.
Our Story
Keplars was born out of our own frustration. Yes we are developers too.
While working on multiple projects, we kept hitting the same wall: Sending transactional emails required endless setup - SPF, DKIM, DMARC, SMTP configurations, domain verifications… hours of wasted time. All we wanted was to send an OTP. Or a password reset. Or an invoice.
There was no tool that let us send transactional emails instantly without this heavy setup.
So we built one.
Keplars started as an internal tool - a way to send emails through Gmail, Google Workspace, or Microsoft Outlook with zero friction. But as we showed early versions to friends, developers, and small teams, their response was clear:
"This should be a product. People need this."
That was the spark. We turned Keplars into a full platform with APIs, SDKs, webhooks, AI-powered templates, analytics, and more.
Email setup so easy, it feels like magic.
What drives us
Keplars is removing friction from email infrastructure for transactional and product emails, giving developers a predictable, boring email-sending foundation, without ongoing setup or debugging - so teams can focus on the product, not email infrastructure.
I've tried several email APIs, but Keplers.email stands out with its simplicity and speed. Perfect for high-volume transactional emails without the hassle. Top-notch service!
Anchit Das
Co-Founder & CTO @ Stealth AI Startup
Very cool! Thanks for the video that was well made and helpful.
Jonathan Goldsmith
iOS Developer
I really love how you've removed the pain point for developer when configuring a mail service like resend, where I always need to have a domain registered already that I can map to the service.
Sola Maxwell Lana
Full-stack Developer
Have been using other service in the past, I guess a simple REST bases system is much better. I like the product.
Priyanshu Verma
Co-Founder & Tech @KaizenLabs
Keplers made setting up email for our startup product straightforward and fast. From a backend perspective, the API was clear and developer-friendly, and we had everything running within minutes.
Oluwatobi Makinde
Lead Software Developer
I really like what you’ve built, the user experience is very intuitive. The setup process was smooth and straightforward.
Collins Ndubisi
Product Designer & Game Developer
I switched from EmailJS to Kepler to focus on code rather than configurations. The instant open and delivery rate tracking gives me total confidence, plus the AI templates save me hours of design work. It is the best choice for developers who value efficiency over complex setups.
Joseph Jonah
Full-Stack Developer
I've tried several email APIs, but Keplers.email stands out with its simplicity and speed. Perfect for high-volume transactional emails without the hassle. Top-notch service!
Anchit Das
Co-Founder & CTO @ Stealth AI Startup
Very cool! Thanks for the video that was well made and helpful.
Jonathan Goldsmith
iOS Developer
I really love how you've removed the pain point for developer when configuring a mail service like resend, where I always need to have a domain registered already that I can map to the service.
Sola Maxwell Lana
Full-stack Developer
Have been using other service in the past, I guess a simple REST bases system is much better. I like the product.
Priyanshu Verma
Co-Founder & Tech @KaizenLabs
Keplers made setting up email for our startup product straightforward and fast. From a backend perspective, the API was clear and developer-friendly, and we had everything running within minutes.
Oluwatobi Makinde
Lead Software Developer
I really like what you’ve built, the user experience is very intuitive. The setup process was smooth and straightforward.
Collins Ndubisi
Product Designer & Game Developer
I switched from EmailJS to Kepler to focus on code rather than configurations. The instant open and delivery rate tracking gives me total confidence, plus the AI templates save me hours of design work. It is the best choice for developers who value efficiency over complex setups.
Joseph Jonah
Full-Stack Developer
I've tried several email APIs, but Keplers.email stands out with its simplicity and speed. Perfect for high-volume transactional emails without the hassle. Top-notch service!
Anchit Das
Co-Founder & CTO @ Stealth AI Startup
Very cool! Thanks for the video that was well made and helpful.
Jonathan Goldsmith
iOS Developer
I really love how you've removed the pain point for developer when configuring a mail service like resend, where I always need to have a domain registered already that I can map to the service.
Sola Maxwell Lana
Full-stack Developer
Have been using other service in the past, I guess a simple REST bases system is much better. I like the product.
Priyanshu Verma
Co-Founder & Tech @KaizenLabs
Keplers made setting up email for our startup product straightforward and fast. From a backend perspective, the API was clear and developer-friendly, and we had everything running within minutes.
Oluwatobi Makinde
Lead Software Developer
I really like what you’ve built, the user experience is very intuitive. The setup process was smooth and straightforward.
Collins Ndubisi
Product Designer & Game Developer
I switched from EmailJS to Kepler to focus on code rather than configurations. The instant open and delivery rate tracking gives me total confidence, plus the AI templates save me hours of design work. It is the best choice for developers who value efficiency over complex setups.
Joseph Jonah
Full-Stack Developer
I've tried several email APIs, but Keplers.email stands out with its simplicity and speed. Perfect for high-volume transactional emails without the hassle. Top-notch service!
Anchit Das
Co-Founder & CTO @ Stealth AI Startup
Very cool! Thanks for the video that was well made and helpful.
Jonathan Goldsmith
iOS Developer
I really love how you've removed the pain point for developer when configuring a mail service like resend, where I always need to have a domain registered already that I can map to the service.
Sola Maxwell Lana
Full-stack Developer
Have been using other service in the past, I guess a simple REST bases system is much better. I like the product.
Priyanshu Verma
Co-Founder & Tech @KaizenLabs
Keplers made setting up email for our startup product straightforward and fast. From a backend perspective, the API was clear and developer-friendly, and we had everything running within minutes.
Oluwatobi Makinde
Lead Software Developer
I really like what you’ve built, the user experience is very intuitive. The setup process was smooth and straightforward.
Collins Ndubisi
Product Designer & Game Developer
I switched from EmailJS to Kepler to focus on code rather than configurations. The instant open and delivery rate tracking gives me total confidence, plus the AI templates save me hours of design work. It is the best choice for developers who value efficiency over complex setups.
Joseph Jonah
Full-Stack Developer
Have been using other service in the past, I guess a simple REST bases system is much better. I like the product.
Priyanshu Verma
Co-Founder & Tech @KaizenLabs
Keplers made setting up email for our startup product straightforward and fast. From a backend perspective, the API was clear and developer-friendly, and we had everything running within minutes.
Oluwatobi Makinde
Lead Software Developer
I really like what you’ve built, the user experience is very intuitive. The setup process was smooth and straightforward.
Collins Ndubisi
Product Designer & Game Developer
I switched from EmailJS to Kepler to focus on code rather than configurations. The instant open and delivery rate tracking gives me total confidence, plus the AI templates save me hours of design work. It is the best choice for developers who value efficiency over complex setups.
Joseph Jonah
Full-Stack Developer
Lightning-fast support and continuous improvements. Excellent service.
James Brown
DevOps Engineer
Seamless workflow integration that saved us countless hours.
Lisa Anderson
Full Stack Developer
Professional, reliable, and feature-rich. Everything we needed in one place.
Christopher Lee
Tech Lead
Have been using other service in the past, I guess a simple REST bases system is much better. I like the product.
Priyanshu Verma
Co-Founder & Tech @KaizenLabs
Keplers made setting up email for our startup product straightforward and fast. From a backend perspective, the API was clear and developer-friendly, and we had everything running within minutes.
Oluwatobi Makinde
Lead Software Developer
I really like what you’ve built, the user experience is very intuitive. The setup process was smooth and straightforward.
Collins Ndubisi
Product Designer & Game Developer
I switched from EmailJS to Kepler to focus on code rather than configurations. The instant open and delivery rate tracking gives me total confidence, plus the AI templates save me hours of design work. It is the best choice for developers who value efficiency over complex setups.
Joseph Jonah
Full-Stack Developer
Lightning-fast support and continuous improvements. Excellent service.
James Brown
DevOps Engineer
Seamless workflow integration that saved us countless hours.
Lisa Anderson
Full Stack Developer
Professional, reliable, and feature-rich. Everything we needed in one place.
Christopher Lee
Tech Lead
Have been using other service in the past, I guess a simple REST bases system is much better. I like the product.
Priyanshu Verma
Co-Founder & Tech @KaizenLabs
Keplers made setting up email for our startup product straightforward and fast. From a backend perspective, the API was clear and developer-friendly, and we had everything running within minutes.
Oluwatobi Makinde
Lead Software Developer
I really like what you’ve built, the user experience is very intuitive. The setup process was smooth and straightforward.
Collins Ndubisi
Product Designer & Game Developer
I switched from EmailJS to Kepler to focus on code rather than configurations. The instant open and delivery rate tracking gives me total confidence, plus the AI templates save me hours of design work. It is the best choice for developers who value efficiency over complex setups.
Joseph Jonah
Full-Stack Developer
Lightning-fast support and continuous improvements. Excellent service.
James Brown
DevOps Engineer
Seamless workflow integration that saved us countless hours.
Lisa Anderson
Full Stack Developer
Professional, reliable, and feature-rich. Everything we needed in one place.
Christopher Lee
Tech Lead
Have been using other service in the past, I guess a simple REST bases system is much better. I like the product.
Priyanshu Verma
Co-Founder & Tech @KaizenLabs
Keplers made setting up email for our startup product straightforward and fast. From a backend perspective, the API was clear and developer-friendly, and we had everything running within minutes.
Oluwatobi Makinde
Lead Software Developer
I really like what you’ve built, the user experience is very intuitive. The setup process was smooth and straightforward.
Collins Ndubisi
Product Designer & Game Developer
I switched from EmailJS to Kepler to focus on code rather than configurations. The instant open and delivery rate tracking gives me total confidence, plus the AI templates save me hours of design work. It is the best choice for developers who value efficiency over complex setups.
Joseph Jonah
Full-Stack Developer
Lightning-fast support and continuous improvements. Excellent service.
James Brown
DevOps Engineer
Seamless workflow integration that saved us countless hours.
Lisa Anderson
Full Stack Developer
Professional, reliable, and feature-rich. Everything we needed in one place.
Christopher Lee
Tech Lead
I switched from EmailJS to Kepler to focus on code rather than configurations. The instant open and delivery rate tracking gives me total confidence, plus the AI templates save me hours of design work. It is the best choice for developers who value efficiency over complex setups.
Joseph Jonah
Full-Stack Developer
Lightning-fast support and continuous improvements. Excellent service.
James Brown
DevOps Engineer
Seamless workflow integration that saved us countless hours.
Lisa Anderson
Full Stack Developer
Professional, reliable, and feature-rich. Everything we needed in one place.
Christopher Lee
Tech Lead
I've tried several email APIs, but Keplers.email stands out with its simplicity and speed. Perfect for high-volume transactional emails without the hassle. Top-notch service!
Anchit Das
Co-Founder & CTO @ Stealth AI Startup
Very cool! Thanks for the video that was well made and helpful.
Jonathan Goldsmith
iOS Developer
I really love how you've removed the pain point for developer when configuring a mail service like resend, where I always need to have a domain registered already that I can map to the service.
Sola Maxwell Lana
Full-stack Developer
I switched from EmailJS to Kepler to focus on code rather than configurations. The instant open and delivery rate tracking gives me total confidence, plus the AI templates save me hours of design work. It is the best choice for developers who value efficiency over complex setups.
Joseph Jonah
Full-Stack Developer
Lightning-fast support and continuous improvements. Excellent service.
James Brown
DevOps Engineer
Seamless workflow integration that saved us countless hours.
Lisa Anderson
Full Stack Developer
Professional, reliable, and feature-rich. Everything we needed in one place.
Christopher Lee
Tech Lead
I've tried several email APIs, but Keplers.email stands out with its simplicity and speed. Perfect for high-volume transactional emails without the hassle. Top-notch service!
Anchit Das
Co-Founder & CTO @ Stealth AI Startup
Very cool! Thanks for the video that was well made and helpful.
Jonathan Goldsmith
iOS Developer
I really love how you've removed the pain point for developer when configuring a mail service like resend, where I always need to have a domain registered already that I can map to the service.
Sola Maxwell Lana
Full-stack Developer
I switched from EmailJS to Kepler to focus on code rather than configurations. The instant open and delivery rate tracking gives me total confidence, plus the AI templates save me hours of design work. It is the best choice for developers who value efficiency over complex setups.
Joseph Jonah
Full-Stack Developer
Lightning-fast support and continuous improvements. Excellent service.
James Brown
DevOps Engineer
Seamless workflow integration that saved us countless hours.
Lisa Anderson
Full Stack Developer
Professional, reliable, and feature-rich. Everything we needed in one place.
Christopher Lee
Tech Lead
I've tried several email APIs, but Keplers.email stands out with its simplicity and speed. Perfect for high-volume transactional emails without the hassle. Top-notch service!
Anchit Das
Co-Founder & CTO @ Stealth AI Startup
Very cool! Thanks for the video that was well made and helpful.
Jonathan Goldsmith
iOS Developer
I really love how you've removed the pain point for developer when configuring a mail service like resend, where I always need to have a domain registered already that I can map to the service.
Sola Maxwell Lana
Full-stack Developer
I switched from EmailJS to Kepler to focus on code rather than configurations. The instant open and delivery rate tracking gives me total confidence, plus the AI templates save me hours of design work. It is the best choice for developers who value efficiency over complex setups.
Joseph Jonah
Full-Stack Developer
Lightning-fast support and continuous improvements. Excellent service.
James Brown
DevOps Engineer
Seamless workflow integration that saved us countless hours.
Lisa Anderson
Full Stack Developer
Professional, reliable, and feature-rich. Everything we needed in one place.
Christopher Lee
Tech Lead
I've tried several email APIs, but Keplers.email stands out with its simplicity and speed. Perfect for high-volume transactional emails without the hassle. Top-notch service!
Anchit Das
Co-Founder & CTO @ Stealth AI Startup
Very cool! Thanks for the video that was well made and helpful.
Jonathan Goldsmith
iOS Developer
I really love how you've removed the pain point for developer when configuring a mail service like resend, where I always need to have a domain registered already that I can map to the service.
Sola Maxwell Lana
Full-stack Developer
You're the reason Keplars keeps expanding.