Growth · alternatives · 2026

24 alternatives to Keplars

Email Infrastructure for Modern Product Teams

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes.

1
Loops▲1,556
Measure whether a campaign drove the desired outcome
2023 · loops.so · its alternatives →
2
Sidemail 2.0▲306
Hi all! I'm Kristyna, maker of Sidemail. I'd love to share with you what we've been building. We built Sidemail because sending emails from a SaaS app was way harder than it should be. Sidemail is made for developers and teams that want one simple place to handle SaaS emails with reliable delivery and no bloat. It has: - Everything for creating, managing and delivering SaaS emails in one platform, - Easy-to-use email API for sending password resets, receipts, etc. - Messenger for writing product updates and newsletters, - Email automations for onboarding and lifecycle flows, - Fast email…
Nov 2025 · sidemail.io · its alternatives →
3
Unosend▲205
Send transactional + marketing email w/ 99.9% deliverability
Dec 2025 · unosend.co · its alternatives →
4
MailerSend▲305
Better transactional emails for teams.
2020 · its alternatives →
5
MailerLite▲290
Intuitively-designed email marketing and website tools
2014 · mailerlite.com · its alternatives →
6
Mailerr▲119
Automated Infrastructure for boosting Cold Email Delivery
2025 · mailerr.co · its alternatives →
7
Mailercloud Email API Platform▲165
1,000+ Emails per Second with 99%+ Deliverability
Mar 2026 · mailercloud.com · its alternatives →
8
Spread▲46
Modern email sending platform for companies
2025 · spread.so · its alternatives →
9
Mailazy▲203
Cloud email infrastructure for the internet
2022 · mailazy.com · its alternatives →
10
AhaSend▲132
I'm the founder of AhaSend. We've built a transactional email service specifically for developers, with a Pay-As-You-Go pricing model ($0.50 per 1,000 emails) and up to 70% volume discount for platform partners. While there are many ESPs out there, we focused heavily on the Developer Experience to solve the pain of building and testing email flows: * The CLI: Heavily inspired by the Stripe CLI, we built a tool that lets you develop and debug locally. You can listen to webhooks, trigger events, manage your domains, and send / list / debug messages directly from your terminal. * True…
2024 · ahasend.com · its alternatives →
11
10xBeast▲270
Customized email campaigns for outbound B2B sales teams
2024 · its alternatives →
12
Yesware▲132
Enabling sales teams do meaningful email outreach at scale
2014 · yesware.com · its alternatives →
13
Sender▲297
Super easy and affordable email marketing platform
2021 · sender.net · its alternatives →
14
AraMailer▲79
Powerful email marketing software to get more sales & clicks
2021 · its alternatives →
15
Blastable▲167
Get More Emails Inboxed Using AI
2025 · blastable.com · its alternatives →
16
Mail Rocket▲141
Create a mail merge with Gmail and Google Sheets
2024 · mailrocket.io · its alternatives →
17
GMPlus▲154
Transform your gmail communication with ChatGPT AI
2023 · gmplus.io · its alternatives →
18
Mailupnext▲67
A reliable & affordable bulk email service.
2019 · its alternatives →
19
Takeout▲112
Just another email service, but 10x better
2022 · its alternatives →
20
MeowMail▲103
Send Emails like Social Media, with 98% Inbox Deliverability
2024 · apps.shopify.com · its alternatives →
21
Mailnest▲100
Sandbox Email testing tool for IT product, service companies
2020 · mailnest.io · its alternatives →
22
Mailshouts▲78
Customized insights over email
2023 · its alternatives →
23
Seer▲98
Making emails actionable.
2014 · getseer.com · its alternatives →
24
MailerLogic▲96
Email API with built-in deliverability intelligence
Apr 2026 · mailerlogic.com · its alternatives →

Also compare

Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →