Real-time
Two-way sync
Changes in Braze or Customer.io instantly reflect in both systems. No stale data, no manual imports.
Business productivity
Braze to Customer.io integration — real-time, two-way sync
Keep Braze and Customer.io in sync without custom scripts. Cut weeks of integration work, eliminate silent data drift, and give your team a single, reliable source of truth.
- SOC 2 and 6 other compliance frameworks
- POC with real engineers in minutes
Adopted by fast-scaling companies moving mission-critical data in real time
Case study
Migrated from MuleSoft
Case study
Migrated from Celigo
Migrated from Heroku Connect
Migrated from Matillion
Case study
Migrated from Fivetran
Case study
Migrated from Celigo
Why teams connect Braze and Customer.io
Stop re-entering the same information in Braze and Customer.io: Stacksync keeps the records they share consistent in real time, in both directions.
Two tools in the daily stack often hold overlapping information: the same people, the same companies, or the same pieces of work, described twice. The tools do different jobs, so consolidating is not the answer; the overlap just needs to stop drifting.
Stacksync syncs Subscription Groups, Content Blocks, Users, Custom Attributes in Braze with Segments, Campaigns, Broadcasts, Deliveries / Messages in Customer.io in real time. You choose which records overlap, map the fields that should match, and pick a direction or let changes flow both ways. From then on, an update made in either tool is reflected in the other within seconds, without exports or copy-paste.
Because the sync is field-level, each tool keeps its own extras; only the shared data is held in agreement.
Common use cases
- 01 Sync audience membership computed in the warehouse into Braze segments for targeting.
- 02 Sync CRM and billing attributes onto Braze user profiles so lifecycle campaigns target accurate plan and status data.
- 03 Land delivery and engagement events (sent, opened, clicked, bounced) from reporting webhooks into a warehouse for attribution analysis.
- 04 Keep unsubscribe and subscription-preference state consistent between Customer.io and the CRM to avoid compliance gaps.
Common sync patterns
Where one tool produces events: mirror them in the other
Payments, replies, messages, or tickets created in one tool can create or update matching records in the other, keeping context in one place.
Where Customer.io is where the team documents or plans: keep its data fed
Information that originates in Braze stays current in Customer.io instead of going stale after a one-time paste.
Handoffs between teams
When work started in one tool continues in the other, the shared fields travel with it automatically.
What you can sync between Braze and Customer.io
Representative objects on each side — any object or custom field can map to any target. Schemas are auto-detected; types are converted between the two systems.
| Braze objects | Customer.io objects | How this pairing syncs | |
|---|---|---|---|
| Segments Audience definitions read for membership export and campaign targeting. | Segments Attribute- or event-based groups; data syncs feed the attributes segments evaluate. | Same entity on both sides — records pair one-to-one and field-level changes reconcile in both directions. | |
| Campaigns Message sends whose metadata and analytics are read for reporting. | Campaigns Automated workflows whose membership and metrics can be read via the App API. | Same entity on both sides — records pair one-to-one and field-level changes reconcile in both directions. | |
| Custom Events Behavioral events pushed into Braze to trigger campaigns and Canvases. | Events Behavioral events sent via the Track API that trigger campaigns. | Custom Events is specific to Braze and Events to Customer.io — each maps to any object or custom field on the other side. | |
| Purchases Transaction records logged against profiles for revenue-based targeting. | Broadcasts One-off sends to segments or audiences, triggerable via API. | Purchases is specific to Braze and Broadcasts to Customer.io — each maps to any object or custom field on the other side. | |
| Canvases Multi-step journeys; entry and performance data is read for lifecycle analysis. | Deliveries / Messages Per-recipient message records whose lifecycle events flow out through reporting webhooks. | Canvases is specific to Braze and Deliveries / Messages to Customer.io — each maps to any object or custom field on the other side. | |
| Subscription Groups Channel-level opt-in states synced with consent records in other systems. | Newsletters Recurring email sends with performance metrics available for reporting syncs. | Subscription Groups is specific to Braze and Newsletters to Customer.io — each maps to any object or custom field on the other side. |
How changes propagate between Braze and Customer.io
Each direction of the sync is driven by what the source system can signal and what the destination accepts — detection, delivery, and expected latency below.
Braze Customer.io Interval-based propagation
DetectionStacksync polls Braze for changes on an incremental schedule, reading only records changed since the previous pass. Braze Currents streams engagement events outward.
DeliveryEach detected change is written to Customer.io through its API, with automatic retries and rate-limit backoff.
Customer.io Braze Sub-second propagation
DetectionCustomer.io notifies Stacksync of record changes through webhook events. Reporting webhooks push message and delivery events.
DeliveryEach detected change is written to Braze through its API, with automatic retries and rate-limit backoff.
Rate-limit considerations
- Braze: Endpoints have per-endpoint rate limits documented by Braze; batch endpoints accept multiple users per request.
- Customer.io: Subject to per-API rate limits documented by Customer.io.
What ships with Braze ⇄ Customer.io
Connect Braze and Customer.io for flexible, real-time data sync.
Real-time sync, workflow automation, event queues, EDI, and monitoring, for every Braze–Customer.io connection.
No-code + pro-code
Workflow automation
Trigger automated workflows whenever Braze or Customer.io data changes, update records, fire webhooks, or kick off sequences without brittle API scripts.
At scale
Event queues
Handle millions of events per minute without losing a single Braze or Customer.io record.
Observability
Monitoring
Track your Braze ⇄ Customer.io sync health, view errors, and replay failed events in one click.
Trading partners
EDI
Transform legacy EDI complexity into simple database interactions between Braze and Customer.io.
How the Braze and Customer.io connectors work
Braze
- Integration surface
- REST API
- Authentication
- REST API keys scoped to specific endpoints, issued per workspace
- Change detection
- Braze Currents streams engagement events outward; profile reads otherwise rely on export endpoints and polling
- Capabilities
- read · write
- Rate limits
- Endpoints have per-endpoint rate limits documented by Braze; batch endpoints accept multiple users per request
Customer.io
- Integration surface
- REST APIs split by purpose: Track API for data ingestion, App API for campaigns, people lookups, and messages
- Authentication
- Basic auth with site ID and API key for the Track API; bearer token for the App API
- Change detection
- Reporting webhooks push message and delivery events; person attribute changes are not streamed and require source-side detection
- Capabilities
- read · write · webhooks
- Rate limits
- Subject to per-API rate limits documented by Customer.io
How it works
How to connect Braze to Customer.io — three steps, no code
Configure and sync within minutes, no code. Whether you sync 50k or 100M+ records, Stacksync handles the queues, infra, and plumbing. Integrations are non-invasive and need zero setup on your systems.
- 01
Connect your apps
Authenticate Braze and Customer.io with each platform's native method — OAuth, API keys, or service accounts — plus secure options like SSH tunneling, IP whitelisting, and VPC peering.
Braze
connected
Customer.io
connected
OAuth 2.0SSH tunnelSSL certificateVPC peering - 02
Choose tables
Pick the Braze and Customer.io objects to sync — Stacksync auto-detects both schemas, including custom fields where the platform exposes them. Sync to existing tables, or let Stacksync create new ones with ideal data types.
objects · Braze ⇄ Customer.ioCustomers 12,480Sales Orders 8,213Invoices 5,902Items 1,344 - 03
Map fields
Fields map automatically even when names and types differ. Stacksync handles transformation and type casting for you, zero configuration required.
Braze Customer.ioCompany company_name textEmail email textAmount amount numericCreated created_at timestamp
FAQ
Braze and Customer.io integration FAQ
-
Yes. Stacksync provides a managed, real-time two-way integration between Braze and Customer.io: authenticate both systems, choose the objects to sync (such as Braze's Segments and Campaigns), map fields visually, and changes propagate both ways in milliseconds — no code required.
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Stacksync is SOC 2 Type II and ISO 27001 certified with HIPAA BAA support. Data is encrypted in transit, and a zero-persistent-storage architecture means Braze and Customer.io records are not retained after a sync operation.
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Stacksync pricing is usage-based and starts at $1,000/month, including the managed Braze and Customer.io connectors, real-time two-way sync, monitoring, and support. That replaces building and maintaining a custom Braze–Customer.io integration in-house.
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Yes — Stacksync ships production-grade connectors for both Braze and Customer.io. The connectors handle authentication, schema detection, rate limits, and retries; you configure the sync, and Stacksync operates it.
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Change detection on Braze: Braze Currents streams engagement events outward; profile reads otherwise rely on export endpoints and polling. On Customer.io: Reporting webhooks push message and delivery events; person attribute changes are not streamed and require source-side detection. Each detected change propagates to the other side in milliseconds, with field-level conflict resolution and an inspectable event log.
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On the Braze side: Subscription Groups, Content Blocks, Users, Custom Attributes, plus custom fields where Braze exposes them. On the Customer.io side: Segments, Campaigns, Broadcasts, Deliveries / Messages. Stacksync auto-detects both schemas and converts types between the two systems.
SECURITY
Security teams trust Stacksync
As a data company, we understand the importance of keeping your data secure. Stacksync is built with security best practices to keep your data safe at every layer, and is DPF-certified for US, EU, UK and CH data transfers.
SOC 2 Type II
ISO 27001
HIPAA BAA
GDPR
CCPA
DPF US-EU-UK-CH
→ SECURITY WITH BENEFITS
SSO & SCIM
Let your users access Stacksync from your centralized user management systems. Works with Okta, Azure, Google SSO and more.
Alerts
Immediately get alerted about record syncing issues over email, Slack, PagerDuty and WhatsApp. Resolve issues from a centralized dashboard with retry and revert options.
Secure connection options
Securely connects to your systems with:
Related integrations
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