Real-time
Two-way sync
Changes in Klaviyo or Twilio instantly reflect in both systems. No stale data, no manual imports.
Business productivity
Klaviyo to Twilio integration — real-time, two-way sync
Keep Klaviyo 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
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Migrated from Celigo
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Migrated from Matillion
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Migrated from Fivetran
Case study
Migrated from Celigo
Why teams connect Klaviyo and Twilio
Stop re-entering the same information in Klaviyo 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 Lists, Segments, Events, Metrics in Klaviyo with Accounts, Roles, Addresses, Flows 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 customer profiles between Klaviyo and the CRM or warehouse so segments can use fields beyond storefront data
- Push offline, ERP, or subscription order events into Klaviyo as metrics to trigger post-purchase and win-back flows
- Mirror Verify outcomes into a user database to gate onboarding steps on completed phone verification.
- Push Twilio usage records into a finance database for per-customer communication cost allocation.
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 Klaviyo stays current in Twilio instead of going stale after a one-time paste.
What you can sync between Klaviyo 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.
| Klaviyo objects | Twilio objects | |
|---|---|---|
| Flows Automation definitions and their engagement data sync outward for attribution. | Flows Synced with incremental and full sync per the Stacksync docs. | |
| Templates Message templates are accessible via API for content management workflows. | Usage Records Aggregated usage and spend data synced into finance systems for cost tracking. | |
| Catalog Items Product catalog records synced from an ERP or PIM power product blocks and back-in-stock triggers. | Messages SMS, MMS, and WhatsApp messages with delivery status; synced to log outreach in CRMs and databases. | |
| Tags Organizational labels on campaigns, flows, and lists support reporting rollups. | Messaging Services Synced with incremental and full sync per the Stacksync docs. | |
| Profiles Person records with arbitrary custom properties are the target for CRM and warehouse-sourced attributes. | Calls Voice call records with duration and outcome, commonly mirrored to support and sales systems. | |
| Lists Static audience memberships sync in from CRMs and forms for targeting. | Incoming Phone Numbers Synced with incremental and full sync per the Stacksync docs. |
What ships with Klaviyo ⇄ Twilio
Connect Klaviyo and Twilio for flexible, real-time data sync.
Real-time sync, workflow automation, event queues, EDI, and monitoring, for every Klaviyo–Twilio connection.
No-code + pro-code
Workflow automation
Trigger automated workflows whenever Klaviyo 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 Klaviyo or Twilio record.
Observability
Monitoring
Track your Klaviyo ⇄ Twilio sync health, view errors, and replay failed events in one click.
Trading partners
EDI
Transform legacy EDI complexity into simple database interactions between Klaviyo and Twilio.
How the Klaviyo and Twilio connectors work
Klaviyo
- Integration surface
- REST API compliant with the JSON:API specification
- Authentication
- OAuth 2.0 for apps or private API keys
- Change detection
- Polling on updated timestamps; outbound webhooks exist for event topics (availability depends on plan or app-partner status) and as flow webhook actions
- Capabilities
- read · write · webhooks
- Rate limits
- Per-endpoint burst and steady rate limits apply
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 Klaviyo 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 Klaviyo 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.
Klaviyo
connected
Twilio
connected
OAuth 2.0SSH tunnelSSL certificateVPC peering - 02
Choose tables
Pick the Klaviyo 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 · Klaviyo ⇄ 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.
Klaviyo TwilioCompany company_name textEmail email textAmount amount numericCreated created_at timestamp
FAQ
Klaviyo and Twilio integration FAQ
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Yes. Stacksync provides a managed, real-time two-way integration between Klaviyo and Twilio: authenticate both systems, choose the objects to sync (such as Klaviyo's Flows and Templates), map fields visually, and changes propagate both ways in milliseconds — no code required.
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Stacksync pricing is usage-based and starts at $1,000/month, including the managed Klaviyo and Twilio connectors, real-time two-way sync, monitoring, and support. That replaces building and maintaining a custom Klaviyo–Twilio integration in-house.
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Yes — Stacksync ships production-grade connectors for both Klaviyo 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 Klaviyo: Polling on updated timestamps; outbound webhooks exist for event topics (availability depends on plan or app-partner status) and as flow webhook actions. 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 Klaviyo side: Lists, Segments, Events, Metrics, plus custom fields where Klaviyo exposes them. On the Twilio side: Accounts, Roles, Addresses, Flows. 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.
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 Klaviyo and Twilio.
Popular · 8 of 386
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Klaviyo ⇄ Aviato -
Klaviyo ⇄ Customer.io -
Klaviyo ⇄ eClinicalWorks -
Klaviyo ⇄ Full Enrich -
Twilio ⇄ Front -
Twilio ⇄ Amazon Seller Central -
Twilio ⇄ SendGrid -
Twilio ⇄ GitHub
No integrations match .
