01 / LISTEN
Start with behavior
Bring in customer data and events. A signup, a purchase, or a quiet stretch can start the next step.
Open source customer messaging
Make every message matter.
Turn customer actions into timely, useful conversations. Build visual journeys across email, SMS, push, and webhooks—on infrastructure you control.
Self-hosted · Open source · Built for real customer moments
Loudkeeper / Journey builder
Welcome journey ● Active
New signupCustomer event
Send welcome emailA personal first hello
Wait for activityGive them time to explore
ActivatedKeep going
Send a nudgeWhen it helps
✓ Right moment, right message
One journey. Many paths. ✦
One place for the full journeyEventsSegmentsJourneysMessages
How it works
From a signal to a conversation.
Connect what people do with the messages they actually need.
02 / SHAPE
Make the path yours
Build journeys visually with timing, branches, and audience rules that fit your product.
03 / CONNECT
Reach people well
Send through email, SMS, push, or webhooks. Keep the conversation connected across channels.
The platformPowerful building blocks.
Powerful building blocks.
One clear workflow.
Visual journeys
Map triggered workflows and see how customers move through each step.
Smart segments
Group people by attributes and actions to keep messages relevant.
Multiple channels
Choose email, SMS, push, and webhooks from one journey.
Branching logic
Adapt each path to what a customer does next.
Experimentation
Try different journey paths and learn what works for your audience.
Your infrastructure
Self-host the platform and keep control of your customer data.
Built around your customers
One journey can take a thousand different turns.
People don't follow a script. Loudkeeper helps you respond to what they do, wait when they need space, and choose the next message with context.
- Trigger journeys from customer events
- Use segments to find the right audience
- Branch and time messages along the way
A journey that adapts
✦ Customer signs upTrigger
✉ Welcome to your workspaceEmail
⏱ Wait for first actionTiming
⋈ Did they get started?Branch
↗ Send the next helpful stepMessage
Every step is shaped by the signals you choose.
Use cases
Meet people wherever they are.
Start with a moment that matters, then build the path around it.
01 / Onboarding
Make a good first impression.
Welcome new users and guide them toward their first meaningful action.
Explore onboarding ↗02 / ActivationHelp the next step happen.
Notice when someone pauses and share a useful nudge at the right time.
Explore activation ↗03 / RetentionStay connected over time.
Respond to engagement signals and welcome customers back.
Explore retention ↗Start building
Get started on GitHub ↗Messaging that feels like a conversation.
Explore the code and run Loudkeeper on your own infrastructure.