KeilavsPostmark

Keila vs Postmark

open-source email newsletter tool with EU hosting vs premium transactional email with best-in-class deliverability

TL;DR

Keila ($8-32/month (cloud)) is a open-source email newsletter tool with EU hosting. Postmark ($15/month) is a premium transactional email with best-in-class deliverability. Keila wins on open source (agplv3). Postmark wins on best deliverability. For SaaS founders, Sequenzy ($49/mo) offers Stripe integration and AI sequences that neither provides.

Key Differences

The main things that set these tools apart

Pricing model

Keila costs $8-32/month (cloud). Postmark costs $15/month. Different pricing models for different needs and budgets.

Primary use case

Keila is best for open source (agplv3). Postmark is best for best deliverability. They optimize for different goals.

Feature depth

Keila strengths: Open source (AGPLv3), EU cloud hosting, Visual editor + MJML. Postmark strengths: Best deliverability, Fast delivery, Message streams.

Pricing Comparison

At comparable usage

Keila
$8-32/month (cloud)

Open source (AGPLv3). Self-hosted free. EU cloud.

Visit Keila
Postmark
$15/month

Premium transactional. Best-in-class deliverability.

Visit Postmark
Sequenzy

The SaaS alternative

$49/month

SaaS marketing + transactional, Stripe integration, 10k contacts

Feature Comparison

Side-by-side feature breakdown

Feature
Keila
Postmark
Sequenzy
Core Features
Open source (AGPLv3)
Varies
Best deliverability
Varies
Email API
Visual email editor
Full drag-and-drop
Marketing & Automation
Marketing automation
Basic
AI-powered sequences
Subscriber management
Full lifecycle management
Stripe integration
Native
Transactional email

Best For

When to choose each tool

Choose Keila if you...
  • Open source (AGPLv3)
  • EU cloud hosting
  • Visual editor + MJML
  • Privacy-first
Choose Postmark if you...
  • Best deliverability
  • Fast delivery
  • Message streams
  • Great support
Choose Sequenzy if you...
  • SaaS founders needing Stripe integration
  • Teams wanting marketing + transactional in one
  • Startups wanting AI-powered email sequences
  • Companies building subscription businesses

Why Consider Sequenzy Instead

Built for SaaS

Neither Keila nor Postmark offers native Stripe integration. Sequenzy connects to [Stripe](/features/stripe-integration) and triggers emails based on subscription events automatically.

Marketing + transactional unified

One platform for [campaigns](/features/campaigns), [transactional emails](/features/transactional-emails), and [AI sequences](/features/ai-sequences). No stitching tools together.

AI-powered sequences

Describe what you want and Sequenzy generates the email sequence. Neither Keila nor Postmark has AI content generation.

Simple pricing

$49/month for 10,000 subscribers with everything included. Check [pricing](/pricing) for details.

Try Sequenzy Free

Overview

Keila and Postmark serve different needs in the email space. Keila is a open-source email newsletter tool with EU hosting. Postmark is a premium transactional email with best-in-class deliverability.

The choice depends on what you need: open source (agplv3) (Keila) or best deliverability (Postmark). For SaaS businesses specifically, Sequenzy offers purpose-built features that neither tool provides.

Pricing Comparison

  • Keila: $8-32/month (cloud) - Open source (AGPLv3). Self-hosted free. EU cloud.
  • Postmark: $15/month - Premium transactional. Best-in-class deliverability.
  • Sequenzy: $49/month for 10,000 subscribers, fully managed. See pricing.

Where Keila Wins

Open source (AGPLv3)

Keila offers open source (agplv3), which is a genuine advantage for teams that need it.

EU cloud hosting

Keila offers eu cloud hosting, which is a genuine advantage for teams that need it.

Visual editor + MJML

Keila offers visual editor + mjml, which is a genuine advantage for teams that need it.

Privacy-first

Keila offers privacy-first, which is a genuine advantage for teams that need it.

Where Postmark Wins

Best deliverability

Postmark offers best deliverability, which matters for teams that prioritize this.

Fast delivery

Postmark offers fast delivery, which matters for teams that prioritize this.

Message streams

Postmark offers message streams, which matters for teams that prioritize this.

Great support

Postmark offers great support, which matters for teams that prioritize this.

Why Sequenzy for SaaS

If you are building a SaaS product, Sequenzy offers what neither Keila nor Postmark provides: native Stripe integration for billing-based automation, AI sequences that generate onboarding and retention emails, and unified transactional + marketing email in one platform. Check our pricing page for details.

Frequently Asked Questions

Keila costs $8-32/month (cloud). Postmark costs $15/month. The better value depends on what features you need beyond just sending.

Neither is purpose-built for SaaS. For subscription businesses, Sequenzy offers native Stripe integration, AI sequences, and unified transactional + marketing email at $49/month.

Yes. Export your contacts from Keila and import them into Postmark. Templates and automations will need to be recreated. Domain authentication (SPF, DKIM) needs to be reconfigured.

Keila has basic automation capabilities. For advanced automation, consider ActiveCampaign or Sequenzy.

Postmark has basic automation features. For advanced automation, consider ActiveCampaign or Sequenzy.

Both have adequate deliverability for their use cases. Postmark is known for best-in-class deliverability. Proper domain authentication (SPF, DKIM, DMARC) matters more than the platform choice.

You could, but it adds complexity. Most teams are better served by one platform that handles their needs.

Sequenzy combines marketing and transactional email with native Stripe integration and AI sequences at $49/month. Built specifically for SaaS businesses that need subscription-aware email automation.

Not sure which to pick?

If you're a SaaS founder who needs Stripe integration and unified email, try Sequenzy free. No credit card required.

Start Free TrialSee All Features

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Sequenzy - Complete Pricing Guide

Pricing Model

Sequenzy uses subscriber-based pricing. You only pay for subscribers active in sequences (automations). Inactive subscribers are free to store.

All Pricing Tiers

  • 0-100 subscribers: Free (Free annually) - 2k emails/month
  • 101-1,000 subscribers: $19/month ($205/year annually) - 15k emails/month
  • 1,001-5,000 subscribers: $29/month ($313/year annually) - 60k emails/month
  • 5,001-10,000 subscribers: $49/month ($529/year annually) - 120k emails/month
  • 10,001-25,000 subscribers: $99/month ($1069/year annually) - 300k emails/month
  • 25,001-50,000 subscribers: $199/month ($2149/year annually) - 600k emails/month
  • 50,001-100,000 subscribers: $349/month ($3769/year annually) - 1.2M emails/month
  • 100,000+ subscribers: Custom pricing (Custom annually) - Unlimited emails/month

Yearly billing: All plans offer a 10% discount when billed annually.

Free Plan Features (0-100 subscribers)

  • Visual automation builder
  • Transactional email API
  • Reply tracking & team inbox
  • Goal tracking & revenue attribution
  • Dynamic segments
  • Payment integrations
  • Full REST API access
  • Custom sending domain

Paid Plan Features (1,000 - 100,000 subscribers)

  • Visual automation builder
  • Transactional email API
  • Reply tracking & team inbox
  • Goal tracking & revenue attribution
  • Dynamic segments
  • Payment integrations (Stripe, Paddle, Lemon Squeezy)
  • Full REST API access
  • Custom sending domain

Enterprise Plan Features (100,000+ subscribers)

  • Visual automation builder
  • Transactional email API
  • Reply tracking & team inbox
  • Goal tracking & revenue attribution
  • Dynamic segments
  • Payment integrations
  • Full REST API access
  • Custom sending domain

Important Pricing Notes

  • You only pay for subscribers who are active in automations/sequences
  • Storing inactive subscribers is free
  • No hidden fees - all features included in the price
  • No credit card required for free tier

Contact

  • Pricing Page: https://sequenzy.com/pricing
  • Sales: hello@sequenzy.com