Enterprise Trusted by teams sending billions of emails
Email Infrastructure forTeams
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.
Trusted by world-class developers & industry leading teams
Built for scale
Infrastructure that performs under enterprise load
The numbers product teams depend on, measured across every region we operate in.
99.99%
Uptime SLA, multi-region failover
100%
Delivery visibility, opens & clicks
<5s
Average time to inbox, globally
99.77%
Inbox deliverability rate, globally
<5 clicks
API & SMTP keys, webhooks, no config
4 Layers
Use Gmail, Workspace, Outlook, or your own domain.
Loved by Product Teams Worldwide
Real feedback from founders, engineers, and operators using Keplars every day for reliable email infrastructure.
"Keplars made email much easier for us. We've used other email tools before, and there's usually some friction - setup, deliverability, or configuration. With Keplars, things felt much more straightforward. We got started quickly, and emails have been consistently reliable. Deliverability has been strong, and the platform is built with strong security, so we're comfortable using it for critical user communication. The developer experience is smooth, and the email editor makes it easy to build and iterate without switching tools. Overall, it fits naturally into our product workflow."
Hamza Zia
Founder & CEO at Gitstart
"We tried a few email tools before this, and honestly, the biggest difference for us was how simple everything felt. You don't need to spend hours figuring things out. The APIs are clear, and the email editor is one of the easiest we've used. It's powerful, but not overwhelming."
Edward So
Cofounder and CEO @ Roostoo Labs
"Keplars runs our internal transactional emails and powers email sending for FoundersBoxx users directly from their own accounts. Two very different use cases, one clean integration. Had it all wired up in minutes."
Filiberto Secchi
Founder & CEO at FoundersBoxx
"With Keplars, we can clearly see delivery, opens, and clicks without digging through logs or multiple tools. It's straightforward, fast to set up, and just feels more predictable and easier to work with."
Damien Mahuzier
Head of Sales at Gitstart
"Keplars is a seamless integration of work emails into our SuperheroSoftware Stack. It is very effective and we look forward to working with them for a long time."
Tim Coleman
Co-Founder of O'Ryan Health
"Integrating with Keplars has been way easier than I thought - everything is super smooth and responsive. As Head of Engineering at TouchStack we have migrated from Resend to Keplars which is way cheaper and flexible to configure email setups for our clients."
Kobby Isreal
CTO at TouchStack
"Keplars has now been our go-to email service provider. It is extremely easy to integrate with and steps for configuration are pretty much simple to go through. Our roll out of Keplars has been fast and efficient and we are getting the value from using Keplars. I strongly recommend Keplars for startup founders who are starting a new project or even scaling existing projects."
Brian Adjei-Otchwemah
Senior Client Success Manager
One platform for every email your product sends
One platform for every email use case, from transactional APIs to full marketing campaigns.
Real-Time Delivery Tracking
Monitor every email's journey from sent to opened. Get instant visibility into delivery status, bounces, and engagement metrics.
100+ Native Integrations
Plug Keplars into your existing stack in minutes. Connect to the CRMs, e-commerce platforms, and dev tools your team already uses.
Marketing Email Campaigns
Design, schedule, and send marketing emails to your audience at scale. Track opens, clicks, and conversions with rich analytics.
Transactional Emails, Done Right
Send password resets, order confirmations, and alerts via our REST API, SMTP relay, webhooks, and official SDKs with sub-second delivery every time.
Drop blocks here…
Unified Email Editor
One editor for drag-and-drop and raw code. Import Canva or Figma designs as email templates and ship pixel-perfect emails faster.
24/7 Expert Support
Real humans, any time. Every Keplars plan includes round-the-clock support so your email infrastructure never leaves you stranded.
