EU-hosted · GDPR by default · DE-NUE + DE-FAL

Email infrastructure with real motion.

Block editor, automation, A/B winner detection, EU-only AI subjects, signed webhooks. Built for workshops, ateliers, and small brands. Free up to 1,000 contacts.

Start free → Watch the 90s tour
9.2/10
sender score
14ms
API p50 latency
240+
workshops sending
0
tracking pixels by default
send.blun.ai/admin/composer/cmp_84f3
subject:
Product launch update|
8,402 recipientsscheduled 09:00 CETwarm sender
AMAnna MüllerRe: leather samples — got the swatches…2m
DCDiogo CostaBergamo trip recap — 4 vendors signed11m
PMBLUN · MailingMon digest: 28k sends · 41.7% open1h
GRGiulia RossiOrder confirmed — 50 hides Friday3h
MRM. RoselliPair-graded shoulder ready next week5h
Sender score
9.2/10
Built on EU-only infrastructure
EU-hosted · DE-NUE + DE-FAL Mangopay · LU escrow + billing Stripe · IE non-EU BLUN AI · DE gateway Bunny.net · CZ CDN
Block Editor

Drag a block. Drop it. Send it.

The fastest way from "I have an idea" to "the campaign is queued". No proprietary syntax, no template-language gotchas — just blocks that snap into place and a canvas that auto-saves every 4 seconds.

  • 11 native blocks — text, image, button, columns, divider, spacer
  • Liquid templating — first-name, conditionals, formatters
  • Branched undo — try a variant, jump back, fork again
  • 4-second autosave — IndexedDB-backed, crash-safe
Blocks
Heading
Heading
Body
Image
Button
Divider
Product launch - sample campaign
147 verified sources joined the database this quarter, weighted toward DACH manufacturing — see what your peers are sourcing this season.
Drop a heading here
Audience

Build segments by dragging tags.

Nest AND/OR/NOT up to four levels deep. The recipient count updates as you compose — no "save then refresh" cycle.

  • Tag any contact — country, industry, last-event, custom field
  • Nested filters — AND/OR/NOT across any field, instant
  • Live recipient count — ~40ms at 100k contacts
  • Saved segments — reuse across campaigns + flows
Segment builder · "DACH leather buyers, last 30d"
All tags 100+
leather italy opened-last-30d verified-buyer workshop DACH-region
→
Selected · AND
leather italy opened-last-30d
2,418
recipients
Automation

Visual flows that actually run.

Drop a trigger, drop a delay, drop a branch, drop an email. The dot lights up the path as a contact moves through. Drop-off warnings appear on any node where conversion lags.

  • Triggers — form, tag, click, segment, date, custom
  • Branches — opened / clicked / segment / tag / time
  • Per-node analytics — sample contact counts at every node
  • BLUN AI insights — drop-off detection + A/B suggestions, EU inference
Welcome series · welcome_v3 demo · 218 sample contacts
Trigger tag-added Delay 3 days Email 1 welcome Branch opened? Wait +7 days Email 2 deepen
A/B winner detection

Call the winner the moment p drops below 0.05.

Most A/B tools wait 24 hours and pretend the wait was the science. BLUN · Mailing watches the cumulative open-rate every 60 seconds and snaps the winner the instant statistical confidence crosses your threshold.

  • Hourly open-rate timeline — p<0.05 threshold marker
  • Apply-to-next-campaign — winner subject + send-time fold into the next draft automatically
  • Per-segment breakdown — B can win overall but lose on your highest-LTV segment
  • Variant locking — once the winner is called, the loser stops automatically
Product launch update · A/B demo demo p = 0.042 · sample winner
A50% split · sample group
Product launch update
38.2%
open rate · sample opens
B · winner50% split · sample group
How Anna sourced from Bergamo, Tirupur and Wenzhou — one chat
45.5%
open rate · sample lift
illustrative open-rate · demo windowp<0.05 threshold
Inbox preview

See your campaign in 32 inbox clients before send.

Gmail web. Gmail iOS. Outlook 365 web + Windows desktop + Mac. Apple Mail macOS + iOS. Thunderbird. Spark. Yahoo. AOL. Proton. GMX. T-Online. web.de. Light + dark mode. Spam-filter scores from 7 sources. 12-link health check. All in 14 seconds.

  • Live render-engine — the same HTML that ships, on the actual client
  • Dark-mode forensics — Gmail inverts your hero? BLUN AI suggests a fix
  • Spam score — SpamAssassin, SCL, Mailspike, Postmaster, Spamhaus, SURBL, Barracuda
  • 12-link health check — every URL in the email pinged before send.
Product launch update · 32-client preview 29 ✓ · 3 warn · 0 fail
✓
BLUN
Product launch
Sample content preview
Gmail · Web
✓
BLUN
Product launch
Sample content preview
Outlook 365
!
BLUN
Product launch
Sample content preview
Outlook 2016
✓
BLUN
Product launch
Sample content preview
Apple Mail · dark
8.3/10
Spam score (low)
12 ✓
Links resolve
14s
Total scan
Live analytics

Watch your campaign performance unfold.

Example analytics show opens, clicks, bounce-rate and webhook alerts in one place. Per-campaign, per-flow, per-tag, per-domain — drill where it matters once your own sends are running.

  • Performance chart — opens + clicks layered across the selected window.
  • Per-flow analytics — node-by-node funnel for every automation.
  • Saved + scheduled reports — Monday digest, daily deliverability watch, custom
  • Webhook on event — pipe everything into your own dashboard

Product launch · demo data

demo
8,402
Sent
3,508
Opens · 41.7%
1,217
Clicks · 14.5%
28
Bounces · 0.33%
100% 50% 0%

Ship your first campaign in 9 minutes.

Pick a domain, drop a few blocks, hit send. Free up to 1,000 contacts and 10k sends/month. No card required, no expiring trial.

Start free → Read 2 case studies first