Overview
Keila and Sendy serve different needs in the email space. Keila is a open-source email newsletter tool with EU hosting. Sendy is a ultra-affordable self-hosted newsletter using Amazon SES.
The choice depends on what you need: open source (agplv3) (Keila) or $69 one-time (Sendy). 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.
- Sendy: $69 one-time - $69 one-time + SES costs (~$0.10/1k). Self-hosted PHP.
- Sequenzy: $99/month for 120,000 emails, unlimited 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 Sendy Wins
$69 one-time
Sendy offers $69 one-time, which matters for teams that prioritize this.
Amazon SES (cheapest sending)
Sendy offers amazon ses (cheapest sending), which matters for teams that prioritize this.
Simple and lightweight
Sendy offers simple and lightweight, which matters for teams that prioritize this.
Battle-tested
Sendy offers battle-tested, which matters for teams that prioritize this.
Why Sequenzy for SaaS
If you are building a SaaS product, Sequenzy offers what neither Keila nor Sendy 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.
Open-Source vs Commercial Trade-off
Keila's AGPLv3 license gives you complete access to the source code, the ability to self-host on your infrastructure, and freedom from vendor lock-in. Sendy is proprietary software where you rent access to features that can change or increase in price at any time. For organizations that prioritize data sovereignty, code auditability, and long-term independence, Keila's open-source approach provides guarantees that commercial platforms cannot. For organizations that prioritize feature depth and convenience, Sendy's commercial approach delivers more capabilities with less operational overhead.
EU Data Sovereignty
Keila's EU cloud hosting addresses a growing concern among European organizations: where their data lives and who can access it. Self-hosted Keila keeps all subscriber data on your own infrastructure under your jurisdiction. Sendy stores data on their servers, typically in the US or EU depending on the plan. For organizations subject to strict GDPR requirements, government agencies, or businesses in regulated industries, Keila's data sovereignty options provide compliance advantages that hosted platforms cannot match.
The Self-Hosting Reality
Self-hosting Keila gives you maximum control but requires maintaining servers, managing updates, handling backups, and ensuring uptime. Sendy's managed service handles all of this for you. The right choice depends on your team's technical capabilities and priorities. Organizations with DevOps teams often prefer self-hosting for control. Organizations without technical staff benefit from managed services that let them focus on marketing rather than infrastructure.
Use-case matchups
| Situation | Best first look | Why |
|---|---|---|
| Team wants open-source control and EU hosting | Keila | Keila is stronger for data control and code access. |
| Team wants low-cost self-hosted newsletters with Amazon SES | Sendy | Sendy is built around a one-time license plus cheap SES sending. |
| Organization has GDPR or sovereignty requirements | Keila | Self-hosting and EU cloud are the main advantage. |
| Budget-focused sender is comfortable with PHP and SES | Sendy | The long-term software cost is low if the stack fits. |
| SaaS team needs Stripe lifecycle and transactional email | Sequenzy | Sequenzy is managed and billing-aware rather than newsletter-only. |
Pricing reality
Keila's $8-32/month cloud price or self-hosted option should be weighed against hosting, SMTP, DNS, backups, updates, and deliverability ownership.
Sendy's $69 one-time license is inexpensive, but the real cost includes PHP hosting, Amazon SES setup, bounce/complaint configuration, updates, backups, and technical maintenance.
Sequenzy's $49/month price is relevant when a SaaS team needs managed transactional plus marketing email and Stripe triggers rather than a self-hosted newsletter tool.
Review signals
| Platform | What reviews in this page suggest | What to validate |
|---|---|---|
| Keila | Review themes favor open source, EU hosting, self-hosting, GDPR control, and newsletter sending. | Confirm operations ownership, integrations, automation depth, and SMTP setup. |
| Sendy | Review themes favor low long-term cost, SES economics, simplicity, and battle-tested newsletter sending. | Confirm PHP maintenance, SES dependency, dated UI tolerance, and bounce/complaint handling. |
Best Fit by Open-Source Control and SES Cost
Best open-source newsletter tool for EU hosting and data control
Keila is the better fit when the organization wants code access, self-hosting, EU cloud options, and a clearer sovereignty story. It is most relevant when GDPR posture, data ownership, and infrastructure control matter more than Sendy's SES-specific cost model.
Best low-cost self-hosted newsletter tool for Amazon SES
Sendy is the better fit when the team wants a one-time license, simple newsletter sending, and very low Amazon SES delivery costs. It suits technical teams comfortable with PHP hosting, MySQL, SES setup, bounces, complaints, updates, and backups.
Best managed lifecycle email platform without self-hosting
Sequenzy fits SaaS teams that do not want to run newsletter infrastructure at all. It is relevant when campaigns, transactional email, Stripe events, and lifecycle automation matter more than open-source control or the lowest possible sending bill.
Migration checklist
| Workstream | Moving toward Keila | Moving toward Sendy | Moving toward Sequenzy |
|---|---|---|---|
| Infrastructure | Configure cloud/self-hosting, SMTP, DNS, backups, updates, and monitoring. | Configure PHP hosting, MySQL, Amazon SES, SNS bounces/complaints, DNS, and backups. | Configure domains, Stripe, app events, transactional routes, and subscriber sync. |
| Subscribers | Import subscribers, lists, fields, consent, and suppressions. | Import lists, subscribers, custom fields, suppression data, and SES status. | Import subscribers, attributes, tags, suppressions, and billing identifiers. |
| Automations | Rebuild simple newsletter flows or externalize automation. | Rebuild autoresponders, campaigns, RSS if used, and SES sending settings. | Rebuild onboarding, billing, transactional, lifecycle, and campaign flows. |
| Templates | Recreate newsletter templates and forms. | Recreate campaign templates, autoresponders, and signup forms. | Recreate lifecycle and transactional templates. |
| Reporting | Track campaigns, bounces, unsubscribes, and delivery health. | Track campaigns, SES bounces/complaints, opens, clicks, and list growth. | Track lifecycle, billing, transactional, and campaign reporting. |
Decision checklist
- Is open-source control or lowest long-term newsletter cost more important?
- Can the team maintain PHP hosting and Amazon SES correctly?
- Do GDPR/data-residency needs point toward Keila?
- Is the dated Sendy workflow acceptable for daily campaign work?
- Is the real requirement SaaS lifecycle email instead of self-hosted newsletters?