Segmentation
Build rule-based dynamic audiences and static lists for targeted messaging
Filter contacts by custom attributes, locale, channel consent, and suppression state so your Email, SMS, and WhatsApp broadcasts reach the right recipients.
Audience management built for multi-channel broadcasts.
Combine typed contact attributes, channel preferences, and workflow membership updates to keep target lists accurate.
Custom Attribute Filters
Filter contacts by string, number, boolean, and date properties, plus locale and timezone
Dynamic Rule Evaluation
Dynamic audiences recalculate membership automatically as contact attributes change
Static Lists and CSV Imports
Curate fixed recipient lists via CSV upload, REST API calls, CLI commands, or MCP tools
Multi-Condition Filter Logic
Combine AND and OR rules across profile fields, custom attributes, and channel status
Workflow Audience Steps
Add or remove contacts from static audiences automatically inside Automations runs
Built-In Suppression Filtering
Exclude unsubscribed, bounced, or opted-out contacts per channel before sending
Filter contacts using custom properties and channel identifiers
Define audience rules from standard profile fields, imported CSV columns, and custom attributes synced from your application backend.
Typed custom properties and profile fields
Build audience rules around plan tier, renewal date, country, preferred language, last order timestamp, or any custom property stored on the contact profile.
Boolean AND/OR filter combinations
Combine multiple attribute comparisons, presence checks, and channel opt-in conditions in the audience builder or through the REST API.
Keep dynamic audiences current as contact attributes change
Let rule-based audiences update membership when your backend syncs new contact properties or when workflow steps modify a profile.
Rule-based dynamic membership
Contacts enter and leave dynamic audiences automatically when their stored attributes or subscription statuses match or stop matching your filter criteria.
Static audiences for curated campaigns
Maintain explicit static lists for event invitees, beta cohorts, or one-time CSV uploads, and add or remove members via API or workflow steps.
Update audiences in workflows and localize broadcasts by recipient
Modify audience memberships during automated workflow runs and pair segmented audiences with multi-language message templates.
In-workflow audience updates and branching
Branch workflow runs on contact attributes and add or remove contacts from static audiences when they reply, complete onboarding, or trigger a backend event.
Locale-aware templates and variable personalization
Target audiences by locale and render matching language variants from templates supporting up to 25 languages, personalized with contact and event variables.
Measure delivery and engagement across target audiences
Track delivery rates, opens, clicks, bounces, and unsubscribes for each broadcast and target audience across Email, SMS, and WhatsApp.
Broadcast and audience delivery metrics
Inspect sent, delivered, bounced, opened, and clicked counts for each audience broadcast so you can spot list quality issues early.
Opt-out and suppression visibility
Monitor unsubscribe and SMS STOP rates across audiences to refine your targeting rules and protect sender reputation.
With Flow Builder we are able to adapt and run the same process through very heterogeneous markets: from Croatia to Uganda or Kazakhstan.
Luis Grau Granada
Global Head of Courier Operations
4x
Faster partner onboarding for some countries
300%
Efficiency in partner onboarding capacity
30-80%
Reduction in partner onboarding costs
Trusted by teams running high-volume customer communication.
See how global brands use Bird audiences to target campaigns and workflows.
94.4%
SMS deliverability improved
3.2x
Faster campaign launches
28%
Higher engagement rate
Sync contacts and audiences from your stack.
Connect REST APIs, webhooks, CSV imports, the Bird CLI, and the MCP server.
Manage audiences via API, CSV, CLI, or MCP
Create static and dynamic audiences, import CSV lists, and update contact attributes through the REST API, Bird CLI, or MCP server.
Shared contact records across channels
Filter on custom attributes, external IDs, and channel preferences stored on a single profile shared across Email, SMS, and WhatsApp.
Enterprise security and compliance controls.
Per-channel suppression enforcement and role-based workspace access.
Automatic opt-out and suppression filtering
Exclude unsubscribed email addresses, hard bounces, spam complaints, and SMS STOP opt-outs per channel when sending to any audience.
Audited security and role-based access
Bird is SOC 2 certified with GDPR, CCPA, and HIPAA compliance, plus isolated EU and US regional cells and role-based workspace permissions.
Put it into practice.
Continue with the documentation, guides and examples for this topic.