Real-time
Two-way sync
Changes in Customer.io or Gladly instantly reflect in both systems. No stale data, no manual imports.
Business productivity ⇄ CRM
Customer.io to Gladly integration — real-time, two-way sync
Keep Customer.io and Gladly 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 Gladly
Sync what happens in Customer.io with the customer records in Gladly, 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 Deliveries / Messages, Newsletters, People, Objects in Customer.io to Conversation items, Agents, Topics, Tasks in Gladly with bi-directional, real-time sync. Activity and record changes in Customer.io update the matching contact or account in Gladly, 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.
- Mirror conversations and topics into a warehouse for CX analytics and staffing models.
- Keep customer attributes such as loyalty tier and lifetime value synced from a warehouse into Gladly profiles for routing and prioritization.
Where Customer.io runs outreach
Prospects, sends, and replies sync into Gladly, keeping lead status current without manual imports.
Where Customer.io supplies contact or company data
Enriched fields land directly on records in Gladly, and refreshes keep them from going stale.
Where Customer.io processes payments
Charges, refunds, and subscription changes appear on the account in Gladly, so revenue context lives with the relationship.
What you can sync between Customer.io and Gladly
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 | Gladly objects | |
|---|---|---|
| Broadcasts One-off sends to segments or audiences, triggerable via API. | Conversation items Individual messages across voice, SMS, chat, and email attached to the conversation. | |
| Deliveries / Messages Per-recipient message records whose lifecycle events flow out through reporting webhooks. | Agents User records used to attribute work in CX analytics. | |
| Newsletters Recurring email sends with performance metrics available for reporting syncs. | Topics Categorization applied to conversations; the key dimension for contact-driver reporting. | |
| People Profiles with attributes, matched on identifiers like id or email; the main write target of data syncs. | Tasks Follow-up work items created from external triggers or synced for workload reporting. | |
| Objects Non-person entities such as accounts or companies, related to people for account-level messaging. | Customer profiles The central entity; merges identifiers like email, phone, and order IDs, which syncs use for matching. | |
| Events Behavioral events sent via the Track API that trigger campaigns. | Conversations Each customer's continuous timeline; status and outcomes sync to CRMs and warehouses. |
What ships with Customer.io ⇄ Gladly
Connect Customer.io and Gladly for flexible, real-time data sync.
Real-time sync, workflow automation, event queues, EDI, and monitoring, for every Customer.io–Gladly connection.
No-code + pro-code
Workflow automation
Trigger automated workflows whenever Customer.io or Gladly 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 Gladly record.
Observability
Monitoring
Track your Customer.io ⇄ Gladly 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 Gladly.
How the Customer.io and Gladly 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
Gladly
- Integration surface
- REST API
- Authentication
- API tokens used with basic authentication tied to an agent email
- Change detection
- Webhook event subscriptions for conversation and customer events, supplemented by polling and report exports
- Capabilities
- read · write · webhooks
- Rate limits
- Subject to the platform's API rate limits
How it works
How to connect Customer.io to Gladly — 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 Gladly 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
Gladly
connected
OAuth 2.0SSH tunnelSSL certificateVPC peering - 02
Choose tables
Pick the Customer.io and Gladly 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 ⇄ GladlyCustomers 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 GladlyCompany company_name textEmail email textAmount amount numericCreated created_at timestamp
FAQ
Customer.io and Gladly integration FAQ
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Yes. Stacksync provides a managed, real-time two-way integration between Customer.io and Gladly: authenticate both systems, choose the objects to sync (such as Customer.io's Broadcasts and Deliveries / Messages), 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. Gladly: Customer profiles are built to merge external identifiers (email, phone, order numbers), which is what integrations key on when matching records from other systems. Stacksync's field mapping accounts for these differences between Customer.io and Gladly 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 Gladly 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 Gladly connectors, real-time two-way sync, monitoring, and support. That replaces building and maintaining a custom Customer.io–Gladly integration in-house.
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Yes — Stacksync ships production-grade connectors for both Customer.io and Gladly. 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 Gladly: Webhook event subscriptions for conversation and customer events, supplemented by polling and report exports. 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 Gladly.
Popular · 8 of 386
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Customer.io ⇄ Copper CRM -
Customer.io ⇄ Creatio CRM -
Customer.io ⇄ Drift -
Customer.io ⇄ Folk CRM -
Gladly ⇄ NextGen Healthcare -
Gladly ⇄ Orderful -
Gladly ⇄ Resend - Gladly ⇄ ServiceNow
No integrations match .
