Real-time
Two-way sync
Changes in Customer.io or Twilio instantly reflect in both systems. No stale data, no manual imports.
Business productivity
Customer.io to Twilio integration — real-time, two-way sync
Keep Customer.io and Twilio 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 Customer.io and Twilio
Stop re-entering the same information in Customer.io and Twilio: 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 Objects, Events, Segments, Campaigns in Customer.io with Messages, Messaging Services, Calls, Incoming Phone Numbers in Twilio 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
- Sync product usage and billing attributes from Postgres onto Customer.io people so lifecycle campaigns trigger on real product behavior.
- Push CRM segments and lead status into Customer.io so messaging respects sales stage.
- Trigger outbound messages by writing rows to a synced database table instead of calling the Twilio API directly from application code.
- Sync delivery and error statuses back into the system that initiated the send, so failed messages surface where the campaign lives.
Where both tools track people or companies: one consistent record
Contact and company details corrected in either tool update the other, so nobody works from the old version.
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 Twilio is where the team documents or plans: keep its data fed
Information that originates in Customer.io stays current in Twilio instead of going stale after a one-time paste.
What you can sync between Customer.io and Twilio
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.
| Customer.io objects | Twilio objects | |
|---|---|---|
| People Profiles with attributes, matched on identifiers like id or email; the main write target of data syncs. | Messages SMS, MMS, and WhatsApp messages with delivery status; synced to log outreach in CRMs and databases. | |
| Objects Non-person entities such as accounts or companies, related to people for account-level messaging. | Messaging Services Synced with incremental and full sync per the Stacksync docs. | |
| Events Behavioral events sent via the Track API that trigger campaigns. | Calls Voice call records with duration and outcome, commonly mirrored to support and sales systems. | |
| Segments Attribute- or event-based groups; data syncs feed the attributes segments evaluate. | Incoming Phone Numbers Synced with incremental and full sync per the Stacksync docs. | |
| Campaigns Automated workflows whose membership and metrics can be read via the App API. | Outgoing Caller IDs Synced with incremental and full sync per the Stacksync docs. | |
| Broadcasts One-off sends to segments or audiences, triggerable via API. | Accounts Synced with incremental and full sync per the Stacksync docs. |
What ships with Customer.io ⇄ Twilio
Connect Customer.io and Twilio for flexible, real-time data sync.
Real-time sync, workflow automation, event queues, EDI, and monitoring, for every Customer.io–Twilio connection.
No-code + pro-code
Workflow automation
Trigger automated workflows whenever Customer.io or Twilio 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 Customer.io or Twilio record.
Observability
Monitoring
Track your Customer.io ⇄ Twilio sync health, view errors, and replay failed events in one click.
Trading partners
EDI
Transform legacy EDI complexity into simple database interactions between Customer.io and Twilio.
How the Customer.io and Twilio connectors work
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
Twilio
- Integration surface
- REST API (per-product APIs for Messaging, Voice, Conversations, Verify)
- Authentication
- Account SID + Auth Token (copied from Twilio Console Account Info and entered into the Stacksync Twilio connector)
- Change detection
- Status callback webhooks per message and call, plus polling of resource lists for backfill
- Capabilities
- read · write · webhooks
How it works
How to connect Customer.io to Twilio — 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 Customer.io and Twilio with each platform's native method — OAuth, API keys, or service accounts — plus secure options like SSH tunneling, IP whitelisting, and VPC peering.
Customer.io
connected
Twilio
connected
OAuth 2.0SSH tunnelSSL certificateVPC peering - 02
Choose tables
Pick the Customer.io and Twilio 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 · Customer.io ⇄ TwilioCustomers 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.
Customer.io TwilioCompany company_name textEmail email textAmount amount numericCreated created_at timestamp
FAQ
Customer.io and Twilio integration FAQ
-
Yes. Stacksync provides a managed, real-time two-way integration between Customer.io and Twilio: authenticate both systems, choose the objects to sync (such as Customer.io's People and Objects), map fields visually, and changes propagate both ways in milliseconds — no code required.
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Yes — Stacksync ships production-grade connectors for both Customer.io and Twilio. 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 Customer.io: Reporting webhooks push message and delivery events; person attribute changes are not streamed and require source-side detection. On Twilio: Status callback webhooks per message and call, plus polling of resource lists for backfill. 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 Customer.io side: Objects, Events, Segments, Campaigns, plus custom fields where Customer.io exposes them. On the Twilio side: Messages, Messaging Services, Calls, Incoming Phone Numbers. Stacksync auto-detects both schemas and converts types between the two systems.
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Yes. Each object mapping can be bidirectional or restricted to a single direction (both systems accept writes). Read-only mirrors, one-way pushes, and full two-way sync can be mixed in the same integration.
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Common patterns for Customer.io and Twilio: Where both tools track people or companies: one consistent record; Where one tool produces events: mirror them in the other; Where Twilio is where the team documents or plans: keep its data fed. Contact and company details corrected in either tool update the other, so nobody works from the old version.
SECURITY
Security teams love 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
CSA STAR
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
Every pair below is a real-time, two-way sync. Search all 386 integrations available for Customer.io and Twilio.
Popular · 8 of 386
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Customer.io ⇄ Aviato -
Customer.io ⇄ eClinicalWorks -
Customer.io ⇄ Full Enrich -
Customer.io ⇄ Google Sheets -
Twilio ⇄ ConnectWise - Twilio ⇄ Aviato
- Twilio ⇄ eClinicalWorks
- Twilio ⇄ Full Enrich
No integrations match .
