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Asana to Customer.io integration — real-time, two-way sync

Keep Asana 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.

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Adopted by fast-scaling companies moving mission-critical data in real time

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Why teams connect Asana and Customer.io

Stop re-entering the same information in Asana 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 Tags, Teams / Workspaces, Tasks, Projects in Asana with Broadcasts, Deliveries / Messages, Newsletters, People 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 Push support tickets or intake requests from an operational database into Asana Tasks, then read completion and status Custom fields back when work finishes.
  • 02 Sync Stories and completion changes from Asana into a database so downstream dashboards and tools react to project progress in near real time.
  • 03 Sync account-level objects and their person relationships for B2B messaging keyed to company attributes.
  • 04 Sync product usage and billing attributes from Postgres onto Customer.io people so lifecycle campaigns trigger on real product behavior.

Common sync patterns

Where Customer.io is where the team documents or plans: keep its data fed

Information that originates in Asana 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.

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.

What you can sync between Asana 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.

Asana objects Customer.io objects How this pairing syncs
Portfolios Collections of Projects for program-level rollup; read for cross-project status and progress reporting (Business and Enterprise). Broadcasts One-off sends to segments or audiences, triggerable via API. Portfolios is specific to Asana and Broadcasts to Customer.io — each maps to any object or custom field on the other side.
Tags Labels applied across Tasks; synced as a many-to-many attribute for filtering and categorization. Deliveries / Messages Per-recipient message records whose lifecycle events flow out through reporting webhooks. Tags is specific to Asana and Deliveries / Messages to Customer.io — each maps to any object or custom field on the other side.
Teams / Workspaces Organizational containers that hold projects and members; used to scope which projects a given sync covers. Newsletters Recurring email sends with performance metrics available for reporting syncs. Teams / Workspaces is specific to Asana and Newsletters to Customer.io — each maps to any object or custom field on the other side.
Tasks The primary unit of work and main record; created, updated, completed, and deleted via REST and synced two-way. Subtasks are Tasks with a parent reference. People Profiles with attributes, matched on identifiers like id or email; the main write target of data syncs. Tasks is specific to Asana and People to Customer.io — each maps to any object or custom field on the other side.
Projects Collections of Tasks with a layout (list, board, timeline, calendar); each project maps to a synced table scope and its custom fields define the mapping. Objects Non-person entities such as accounts or companies, related to people for account-level messaging. Projects is specific to Asana and Objects to Customer.io — each maps to any object or custom field on the other side.
Sections Ordered groupings of Tasks within a project; synced as a grouping attribute or category field on the row. Events Behavioral events sent via the Track API that trigger campaigns. Sections is specific to Asana and Events to Customer.io — each maps to any object or custom field on the other side.

How changes propagate between Asana 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.

Asana Customer.io Sub-second propagation

DetectionAsana notifies Stacksync of record changes through webhook events. Resource-scoped webhooks (established with an X-Hook-Secret handshake) POST events on create, change, and delete.

DeliveryEach detected change is written to Customer.io through its API, with automatic retries and rate-limit backoff.

Customer.io Asana 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 Asana through its API, with automatic retries and rate-limit backoff.

Rate-limit considerations

  • Asana: Per token: 1,500 requests/minute on paid plans, 150/minute on free; the Search API is capped at 60/minute; concurrency caps at 50 GET and 15 write requests. Exceeding a limit returns HTTP 429 with a Retry-After header, and a separate cost-based limiter applies to complex graph traversals.
  • Customer.io: Subject to per-API rate limits documented by Customer.io.
What ships with Asana ⇄ Customer.io

Connect Asana and Customer.io for flexible, real-time data sync.

Real-time sync, workflow automation, event queues, EDI, and monitoring, for every Asana–Customer.io connection.

Real-time

Two-way sync

Changes in Asana or Customer.io instantly reflect in both systems. No stale data, no manual imports.

No-code + pro-code

Workflow automation

Trigger automated workflows whenever Asana 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 Asana or Customer.io record.

Observability

Monitoring

Track your Asana ⇄ 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 Asana and Customer.io.

How the Asana and Customer.io connectors work

Asana

Integration surface
REST API (app.asana.com/api/1.0, JSON responses), plus resource-scoped Webhooks and a sync-token Events API
Authentication
OAuth 2.0 for multi-user apps, Personal Access Tokens (PATs) for single-account use and testing, and organization-scoped Service Accounts (Enterprise) for admin-level access
Change detection
Resource-scoped webhooks (established with an X-Hook-Secret handshake) POST events on create, change, and delete; the sync-token Events API returns incremental changes on a task or project when webhooks are not used
Capabilities
read · write · webhooks
Rate limits
Per token: 1,500 requests/minute on paid plans, 150/minute on free; the Search API is capped at 60/minute; concurrency caps at 50 GET and 15 write requests. Exceeding a limit returns HTTP 429 with a Retry-After header, and a separate cost-based limiter applies to complex graph traversals.

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 Asana 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.

  1. 01

    Connect your apps

    Authenticate Asana 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.

    • OAuth 2.0
    • SSH tunnel
    • VPC peering
    Asana connected
    Customer.io connected
    OAuth 2.0
    SSH tunnel
    SSL certificate
    VPC peering
  2. 02

    Choose tables

    Pick the Asana 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.

    • Standard objects
    • Custom objects
    • Auto-schema
    objects · Asana ⇄ Customer.io
    Customers 12,480
    Sales Orders 8,213
    Invoices 5,902
    Items 1,344
  3. 03

    Map fields

    Fields map automatically even when names and types differ. Stacksync handles transformation and type casting for you, zero configuration required.

    • Auto-map
    • Type casting
    • Transforms
    Asana Customer.io
    Company company_name text
    Email email text
    Amount amount numeric
    Created created_at timestamp
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FAQ

Asana and Customer.io integration FAQ

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.

Learn more about security
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ISO 27001
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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:

OAuth 2 SSH Tunnelling SSL certificates IP Whitelisting VPN gateway VPC peering and more

Related integrations

Every pair below is a real-time, two-way sync. Search all 422 integrations available for Asana and Customer.io.

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