Real-time
Two-way sync
Changes in Customer.io or Twenty CRM instantly reflect in both systems. No stale data, no manual imports.
Business productivity ⇄ CRM
Customer.io to Twenty CRM integration — real-time, two-way sync
Keep Customer.io and Twenty CRM 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 Twenty CRM
Sync what happens in Customer.io with the customer records in Twenty CRM, in real time and in both directions.
The CRM is supposed to be the record of every customer relationship, but customer-relevant information also accumulates in the other tools a team runs. Whatever Customer.io holds or produces that touches a customer, whether conversations, payments, replies, enriched data, or notes, the CRM only benefits if it arrives without someone copying it over.
Stacksync connects Segments, Campaigns, Broadcasts, Deliveries / Messages in Customer.io to People, Companies, Opportunities, Tasks in Twenty CRM with bi-directional, real-time sync. Activity and record changes in Customer.io update the matching contact or account in Twenty CRM, and CRM data flows the other way wherever Customer.io can store and use it.
Common use cases
- Push CRM segments and lead status into Customer.io so messaging respects sales stage.
- Land delivery and engagement events (sent, opened, clicked, bounced) from reporting webhooks into a warehouse for attribution analysis.
- Two-way sync of People and Companies between Twenty and a production Postgres database so engineers can query CRM data with SQL.
- Push product usage or billing data from a warehouse into Twenty custom fields to give reps account context.
Where Customer.io handles support or shared inboxes
Tickets and conversations attach to the right contact and account in Twenty CRM, so sales sees open issues before the next call.
Where Customer.io runs outreach
Prospects, sends, and replies sync into Twenty CRM, keeping lead status current without manual imports.
Where Customer.io supplies contact or company data
Enriched fields land directly on records in Twenty CRM, and refreshes keep them from going stale.
What you can sync between Customer.io and Twenty CRM
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 | Twenty CRM objects | |
|---|---|---|
| Deliveries / Messages Per-recipient message records whose lifecycle events flow out through reporting webhooks. | Workspace Members User accounts used for record ownership and assignment mapping. | |
| Newsletters Recurring email sends with performance metrics available for reporting syncs. | People Individual contact records with emails, phones, and company links; a core target for contact syncs. | |
| People Profiles with attributes, matched on identifiers like id or email; the main write target of data syncs. | Companies Account-level records that group people and opportunities. | |
| Objects Non-person entities such as accounts or companies, related to people for account-level messaging. | Opportunities Deal records tracked through pipeline stages, synced for forecasting. | |
| Events Behavioral events sent via the Track API that trigger campaigns. | Tasks To-dos linked to people, companies, or deals. | |
| Segments Attribute- or event-based groups; data syncs feed the attributes segments evaluate. | Notes Free-form notes attached to records, useful for mirroring activity from other tools. |
What ships with Customer.io ⇄ Twenty CRM
Connect Customer.io and Twenty CRM for flexible, real-time data sync.
Real-time sync, workflow automation, event queues, EDI, and monitoring, for every Customer.io–Twenty CRM connection.
No-code + pro-code
Workflow automation
Trigger automated workflows whenever Customer.io or Twenty CRM 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 Twenty CRM record.
Observability
Monitoring
Track your Customer.io ⇄ Twenty CRM 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 Twenty CRM.
How the Customer.io and Twenty CRM 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
Twenty CRM
- Integration surface
- GraphQL and REST APIs
- Authentication
- API key
- Change detection
- Webhooks on record create, update, and delete events, or polling on record update timestamps
- Capabilities
- read · write · webhooks
- Rate limits
- Subject to the platform's API rate limits; self-hosted deployments control their own limits.
How it works
How to connect Customer.io to Twenty CRM — 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 Twenty CRM 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
Twenty CRM
connected
OAuth 2.0SSH tunnelSSL certificateVPC peering - 02
Choose tables
Pick the Customer.io and Twenty CRM 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 ⇄ Twenty CRMCustomers 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 Twenty CRMCompany company_name textEmail email textAmount amount numericCreated created_at timestamp
FAQ
Customer.io and Twenty CRM integration FAQ
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Yes. Stacksync provides a managed, real-time two-way integration between Customer.io and Twenty CRM: authenticate both systems, choose the objects to sync (such as Customer.io's Deliveries / Messages and Newsletters), map fields visually, and changes propagate both ways in milliseconds — no code required.
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Customer.io: Beyond people, Customer.io supports non-person objects (for example accounts) with typed relationships to people, enabling account-based messaging logic. Twenty CRM: Twenty is open source and self-hostable, backed by PostgreSQL, with an object and field model that is metadata-driven and editable from the UI. Stacksync's field mapping accounts for these differences between Customer.io and Twenty CRM without custom code.
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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 Customer.io and Twenty CRM 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 Customer.io and Twenty CRM connectors, real-time two-way sync, monitoring, and support. That replaces building and maintaining a custom Customer.io–Twenty CRM integration in-house.
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Yes — Stacksync ships production-grade connectors for both Customer.io and Twenty CRM. 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 Twenty CRM: Webhooks on record create, update, and delete events, or polling on record update timestamps. Each detected change propagates to the other side in milliseconds, with field-level conflict resolution and an inspectable event log.
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 Twenty CRM.
Popular · 8 of 386
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Customer.io ⇄ Attio -
Customer.io ⇄ Pipedrive -
Customer.io ⇄ Zoho CRM -
Customer.io ⇄ Shopify -
Twenty CRM ⇄ NextGen Healthcare -
Twenty CRM ⇄ Orderful -
Twenty CRM ⇄ Resend - Twenty CRM ⇄ ServiceNow
No integrations match .
