Philipp 🐘 keila.io

@pentacent.bsky.social

164 Followers 41 Following

Building keila.io, an easy-to-use and reliable Open Source email newsletter tool. #elixirlang #opensource #buildinpublic

Screenshot of the Keila docs page for the Campaigns API. It shows an excerpt of the GET /api/v1/campaigns endpoint.

Screenshot from Sourcetree showing 35 removemd and 35 added lines.

Screenshot of the Keila template edtior, showing some HTML and Liquid code (featuring inserting the contact name and the unsubscribe link) on the left and a rendered preview on the right.

Video clip showing the Keila MJML editor. On the left there's a code editor with MJML code, on the right the rendered preview. Both halves of the screen are shown being scrolled up/down independently.

Screenshot of the Keila campaign editor. On the left is a code editor for MJML where two mj-section elements are shown.
On the right is the preview of a full email with a header, the content defined on the left, and a footer.

An animation with the title "So you want to create an email template?!". It shows the MJML source of a simple email template featuring the <keila-content> element and highlights which parts of the template can be edited and which ones will be static.

Screenshot of the "New Template" screen. It lists the following options:

1) Classic: The classic Keila template with easy options for adjusting styles. This type can be used to create Markdown and Block editor emails. It can not be configured with custom content at the template level.
2) MJML: MJML makes it easy to create responsive emails. This type can be used to create Markdown, Block editor, and MJML emails.
3) HTML: Raw HTML template for full customizability.
4) Plain text: Template type for plain-text emails.

Screenshot from testi.at, showing a multi-column layout across various versions of Outlook, rendering identically.

Infographic showing a comparison between taking a train from Nuremberg to Málaga vs taking the plane. The train causes 17kg, a direct flight 306kg CO2e. The actual trip included a short flight and came in at 63kg CO2e. Data from Atmosfair, DB, and SNCF.

Photo of the Rotonde de Stalingrad in Paris

A laptop showing the home page of keila.io on a tray table on train, through the window a canal surrounded by greenery can be seen.

Photo of a laptop showing some Elixir code on a seat tray in a TGV train. Next to the laptop is a stack of Keila-branded business cards.

Here is a price comparison (data from April 10 2026) between Keila and Mailchimp Standard for someone who sends one newsletter per month:
Emails/month Keila Mailchimp Savings with Keila
100 8€ €18 55%
1,000 8€ €40 80%
2,000 8€ €53 85%
5,000 16€ €87 82%
10,000 32€ €118 73%
50,000 64€ €391 84%

Popup that reads: " We'd like to store a cookie to remember how you found our website. This helps us understand how visitors find out about Keila. Privacy policy". Reply options: No - Okay

LinkedIn screenshot: "Schon eine Minute spielen am Tag erhöht Ihre Aufmerksamkeit und Konzentration. - Benachrichtigen Sie mich, damit ich LinkedIn Denkspiele ausprobieren kannBenachrichtigen Sie mich, damit ich LinkedIn Denkspiele ausprobieren kann"

Screenshot from the UptimeRobot status page admin panel, saying announcements can only be created on Team and Enterprise plans.

Screenshot of the Keila campaign editor in Italian, featuring a picture of the tower of Pisa.

Illustration from the Mastodon app

Screenshot of the emoji autocomplete on a German installation of Signal Desktop, showing "flagge_bei" for Austria and "markierungspunkt" for Portugal.

Animation showing an image being resized and then centered in the Keila block editor.

Screenshot of an email preview with an image of an elephant looking to the right, filling out about 2/3s of the email width and a right-aligned caption that reads: elephant looking to the right.

Screenshot of the Keila Block editor showing a paragraph with an inline tool that allows changing the text alignment.

The form editor with the various settings organized vertically in the style of an acordion.

Screencast showing a click on the double opt-in email, followed by a two-second "Confirming ..." waiting message before the final confirmation.

Screenshot of the Keila interface showing the "Forms" headline and a card for "My Signup Form" which has an Open and an Edit button.

Message that says: Your subscription has been cancelled.
You can continue using your subscription until: January 21 2027.

Button that says: Start new subscription

Keila account creation page in Bulgarian: Започнете да изпращате имейли с Keila сега

Screenshot of a bunch of Bluesky posts that simply say "NO_REPLY".

Screenshot of the Keila interface in Hungarian: Használja a kampányszerkesztőt kampányok létrehozásához, ütemezéséhez és elküldéséhez a kontaktjai számára.

Screenshot of the Keila form editor, showing the Welcome Email settings with an email preview that offers a PDF course download.

Screenshot of the Keila form editor, showing a new "Welcome Email" tab in which a welcome email with a download button has been configured.

Animation showing the editor being scrolled with the menu sticking to the top and remaining visible.

Screenshot of the Keila campaign overview page in Spanish.

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$Open this email in your browser: {{ campaign.public_link }}$

Atlassian: Upcoming changes to Free Bitbucket workspace
GitHub: GitHub is updating the Actions pricing structure (x4)

webr::install("lubridate")
library("lubridate")

ymd_hms("2025-06-12 08:25:30+02:00", tz = "Europe/Stockholm")
ymd_hms("2025-06-12 08:25:30+02:00", tz = "CEST")

test@nein.de

$test "verify something from a token", %{conn: conn} do {:ok, agent_pid} = Agent.start_link(fn -> nil end) capture_token = fn token -> Agent.update(agent_pid, fn _ -> token end) end MyApp.SomeContext.send_verification_email(&capture_token.(&1)) token = Agent.get(token_agent, & &1) assert something(token) end$

You're using a shared domain. Emails will be sent from:
keila.mailbox.org@keilamails.com
Replies will go to your verified address.
Read more about this

Screenshot from the Keila docs documenting the "success_url" property:

URL to redirect after contact was successfully created - either after double opt-in or after form submission without double opt-in. Supports Liquid with the contact assign present.

Logs showing bots calling various files, like info.php or /.git/config

All systems Operational
Send With Keila service restored
The service disruption of Send with Keila has been fixed and sending emails is working again as usual.

Screenshot of the Keila interface showing a yellow banner apologizing for the service disruption.

Screenshot of the Sender form from Keila, showing the configuration of a "Test" sender with the Reply-to settings hidden behind an expandable element.

Screencast of the Keila Block Editor showing a list of social media icons to which a GitHub icon is being added in the video.

Screenshot from the Paddle UI showing several cancelled accounts

Screenshot of the the "View" tab on the new after-send page. It's showing a sent campaign with a toggle to switch between desktop and mobile view.

Screenshot of the Keila landing page in Spanish: Boletines Informativos por Correo Electrónico Fáciles y Confiables Impulsado por Código Abierto

Screenshot of a newsletter created in Keila - but it's a website!

Screencast showing a selection screen where a user can toggle between the options "Send with Keila" and "Custom". Hovering with the mouse over one of the boxes clearly highlights is border. Selecting it changes the color of the background and the border. There's also a design that mimics the native radio button present to provide even more context.