Features and improvements we have shipped, newest first. Plunk is open source, so the full commit history is on GitHub.
2 updates
Contacts can pause your emails for 2 weeks, 1 month, 6 months, or 1 year instead of leaving for good. Plunk resubscribes them automatically when the snooze ends.
Read the docs: Snooze instead of unsubscribingHow long should we pause your emails?
CancelSnoozed until October 11, 2026
Hide campaigns and drafts you no longer need from the campaign list. Their stats are kept, and you can restore them.
8 updates
Connect Claude, Cursor, or any MCP client to your project. Your agent can manage contacts, draft campaigns, and send email, and it asks you to confirm before sending a campaign.
Explore the feature: MCP server$ claude mcp add plunk -- npx -y @plunk/mcp
Added stdio MCP server plunk
› Unsubscribe ana@example.com
plunk_unsubscribe_contact(email: "ana@example.com")
unsubscribed
The editor flags Liquid syntax errors as you type, highlights logic tags, and inserts ready-made if, case, and for blocks from a menu.
Read the docs: Liquid-aware template editor1Hi {{ contact.firstName | upcse }},
undefined filter: upcse
2{%
Cancelling a campaign drops its unsent emails and turns it back into an editable draft.
Plunk tracks an event whenever a contact subscribes or unsubscribes, so workflows can trigger on it.
Turn on rate limits, with burst allowances, for the track, send, and contact endpoints.
Marketing emails include the RFC 8058 headers, so the unsubscribe button built into inboxes works without opening a page.
Add a step between two existing steps, or disconnect and reconnect branches, without rebuilding the workflow.
Unsubscribe and preference pages are now available in Swedish.
4 updates
Subjects and bodies render with LiquidJS, so templates get conditionals, loops, filters, and fallback values on top of plain variables.
Read the docs: Liquid templating{% for item in order.items %}
{{ item.name }} × {{ item.qty }}
{% endfor %}
Your order is on its way
Marketing, transactional, and headless emails each get only the standard headers their type calls for.
Retry requests safely. A key reused within 24 hours is rejected, so the same email or event is never sent twice.
Plunk deletes rendered email bodies after 90 days. Stats and activity are kept.
3 updates
Contacts, templates, campaigns, and workflows share one table with sorting, faceted filters, and bulk delete.
Unsubscribe and preference pages are now available in Japanese.
Differences in letter case or stray whitespace no longer create duplicate contacts.
5 updates
Filter on membership of another segment, or on events a contact has not triggered recently. A win-back audience takes 2 rules.
Explore the feature: Segments built from segmentsand
Use contact and event data in the URL, headers, and body of a workflow webhook step.
Copy a workflow with all its steps and branches, then edit the copy.
The Update contact step can now subscribe or unsubscribe the contact.
Check SPF, DKIM, DMARC, and MX records, inspect email headers, or test an email for spam.
5 updates
Jump to any page, recent item, or project from anywhere in the dashboard.
Switch project
Loop Studio
Loop Studio (staging)
Recent
Campaign: Loop weekly
New projects start with a short checklist based on what you use Plunk for: campaigns, transactional email, or automations.
Self-hosted instances can raise the attachment size and count, up to the 40 MB that SES allows.
Delivery, open, and bounce events include the ID returned by the send request, so you can match each one to its email.
Send your own HTML without the Plunk footer. Unsubscribed contacts are still skipped.
3 updates
A condition step can split into as many branches as you need, like a switch statement, with a default branch for everything else.
Explore the feature: Multi-branch conditionsUnsubscribe and preference pages are now available in Simplified, Traditional, and Hong Kong Chinese.
Unsubscribe and preference pages are now available in Italian.
5 updates
Receive email at any address on your domain. Senders are added as contacts, and every message triggers an event and a webhook.
Explore the feature: Inbound emailAdd contacts to a segment by hand. Its members only change when you change them.
Unsubscribe and preference pages are now available in Spanish, Polish, and Czech.
Switch an existing workflow to a different trigger event without rebuilding it.
Send a workflow email to your team or any other address, not only the contact.
5 updates
Attach an image with a Content-ID and reference it from your HTML. It appears in the email body instead of as an attachment.
Read the docs: Inline imagesattachments: [{ contentId: "logo", … }]
<img src="cid:logo" />
Thanks for your order
Receipt #4021 from Loop Studio
Filter the activity feed to bounces and complaints, the events that affect your sending reputation.
Unsubscribe and preference pages are now available in Portuguese and Bulgarian.
Match contacts whose date field is more than a set number of days, weeks, or months in the past.
Block new account signups so only existing users can sign in.
7 updates
Open any sent email from a contact's page or the activity feed to see exactly what they received.
Welcome to Loop
hello@loopstudio.io
Hi Ana, your workspace is ready. Here are three things to try first.
Set a language per project, or per contact with a locale field, and these pages follow it. Plunk supports 16 languages today.
Se désabonner
Ne plus recevoir les e-mails de Loop Studio à l'adresse ana@example.com ?
Se désabonnerSee your project's bounce and complaint rates next to Plunk's thresholds, with a warning well before a rate is high enough to disable the project.
Warnings come well before the limits that disable a project.
Check an address for valid syntax, disposable domains, plus-addressing, and MX records before you add it.
Select contacts across pages, or every contact at once, then subscribe, unsubscribe, or delete them together.
Start a campaign from a template, or duplicate a campaign you already sent.
Hand-written HTML templates open in a CodeMirror editor with syntax highlighting and code folding.
Free plan: 1,000 emails a month. Paid: $0.001 an email.
