Real-time
Two-way sync
Changes in Kustomer or Smartsheet instantly reflect in both systems. No stale data, no manual imports.
CRM ⇄ Business productivity
Kustomer to Smartsheet integration — real-time, two-way sync
Keep Kustomer and Smartsheet 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
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Migrated from MuleSoft
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Migrated from Fivetran
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Migrated from Celigo
Why teams connect Kustomer and Smartsheet
Sync what happens in Smartsheet with the customer records in Kustomer, 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 Smartsheet 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 Reports, Attachments, Discussions and Comments, Users and Groups in Smartsheet to Tags, Notes, Customers, Conversations in Kustomer with bi-directional, real-time sync. Activity and record changes in Smartsheet update the matching contact or account in Kustomer, and CRM data flows the other way wherever Smartsheet can store and use it.
Common use cases
- 01 Two-way sync a project-tracker Sheet's Rows with a Postgres table so engineering works in SQL while project managers stay in Smartsheet.
- 02 Write records from a CRM or ERP into Smartsheet Rows so ops teams manage intake and status in a grid, then push status Cells back to the source.
- 03 Sync customers bi-directionally with the CRM and ERP so agents see deal, billing, and subscription context on the timeline
- 04 Push order and shipment records from commerce systems into Kustomer custom objects so agents answer order-status questions without switching tools
Common sync patterns
Where Smartsheet supplies contact or company data
Enriched fields land directly on records in Kustomer, and refreshes keep them from going stale.
Where Smartsheet can store CRM context: fields kept current
Owner, lifecycle stage, or account details from Kustomer sync into Smartsheet, so people working there have the context without switching tools.
What you can sync between Kustomer and Smartsheet
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.
| Kustomer objects | Smartsheet objects | How this pairing syncs | |
|---|---|---|---|
| Teams Team assignments support routing parity and reporting. | Cells Row-by-column values; writes must match the column type and no single cell can exceed 4,000 characters. | Teams is specific to Kustomer and Cells to Smartsheet — each maps to any object or custom field on the other side. | |
| Tags Labels on conversations and customers sync for categorization and analytics. | Reports Read-only roll-ups spanning multiple sheets; pulled into a warehouse for cross-sheet reporting, capped at 50,000 rows. | Tags is specific to Kustomer and Reports to Smartsheet — each maps to any object or custom field on the other side. | |
| Notes Internal annotations carry context alongside synced conversations. | Attachments Files linked to rows or sheets; posting one carries a 10x rate cost, so bulk file sync is throttled to 30 per minute. | Notes is specific to Kustomer and Attachments to Smartsheet — each maps to any object or custom field on the other side. | |
| Customers The central record whose timeline aggregates every interaction; external attributes sync onto it. | Discussions and Comments Threaded comments on rows and sheets; read out to sync collaboration history or activity into another system. | Customers is specific to Kustomer and Discussions and Comments to Smartsheet — each maps to any object or custom field on the other side. | |
| Conversations Support threads across channels sync outward for analytics and CRM context. | Users and Groups Account membership and sharing; synced to keep an HR or identity source aligned with sheet and workspace access. | Conversations is specific to Kustomer and Users and Groups to Smartsheet — each maps to any object or custom field on the other side. | |
| Messages Individual messages within conversations support full-thread replication. | Sheets The core container; each sheet has typed columns, rows, and a modifiedAt stamp. Stacksync treats a sheet as a table and syncs its rows two-way. | Messages is specific to Kustomer and Sheets to Smartsheet — each maps to any object or custom field on the other side. |
How changes propagate between Kustomer and Smartsheet
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.
Kustomer Smartsheet Sub-second propagation
DetectionKustomer notifies Stacksync of record changes through webhook events. Outbound webhooks on record events, plus polling for backfill.
DeliveryEach detected change is written to Smartsheet through its API, with automatic retries and rate-limit backoff.
Smartsheet Kustomer Sub-second propagation
DetectionSmartsheet notifies Stacksync of record changes through webhook events. Sheet-scoped webhooks subscribed to *.* events notify on row and cell changes.
DeliveryEach detected change is written to Kustomer through its API, with automatic retries and rate-limit backoff.
Rate-limit considerations
- Kustomer: Subject to the platform's API rate limits.
- Smartsheet: 300 requests per minute per access token; heavy calls like posting attachments cost 10x (30/min). A 429 returns errorCode 4003, back off ~60s.
What ships with Kustomer ⇄ Smartsheet
Connect Kustomer and Smartsheet for flexible, real-time data sync.
Real-time sync, workflow automation, event queues, EDI, and monitoring, for every Kustomer–Smartsheet connection.
No-code + pro-code
Workflow automation
Trigger automated workflows whenever Kustomer or Smartsheet 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 Kustomer or Smartsheet record.
Observability
Monitoring
Track your Kustomer ⇄ Smartsheet sync health, view errors, and replay failed events in one click.
Trading partners
EDI
Transform legacy EDI complexity into simple database interactions between Kustomer and Smartsheet.
How the Kustomer and Smartsheet connectors work
Kustomer
- Integration surface
- REST API
- Authentication
- API key used as a bearer token, scoped by role
- Change detection
- Outbound webhooks on record events, plus polling for backfill
- Capabilities
- read · write · webhooks
- Rate limits
- Subject to the platform's API rate limits
Smartsheet
- Integration surface
- REST API (v2.0)
- Authentication
- OAuth 2.0 authorization-code flow, or a raw/personal API access token passed as a Bearer header
- Change detection
- Sheet-scoped webhooks subscribed to *.* events notify on row and cell changes; otherwise polling on sheet and row modifiedAt timestamps
- Capabilities
- read · write · webhooks
- Rate limits
- 300 requests per minute per access token; heavy calls like posting attachments cost 10x (30/min). A 429 returns errorCode 4003, back off ~60s.
How it works
How to connect Kustomer to Smartsheet — 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 Kustomer and Smartsheet with each platform's native method — OAuth, API keys, or service accounts — plus secure options like SSH tunneling, IP whitelisting, and VPC peering.
Kustomer
connected
Smartsheet
connected
OAuth 2.0SSH tunnelSSL certificateVPC peering - 02
Choose tables
Pick the Kustomer and Smartsheet 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 · Kustomer ⇄ SmartsheetCustomers 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.
Kustomer SmartsheetCompany company_name textEmail email textAmount amount numericCreated created_at timestamp
FAQ
Kustomer and Smartsheet integration FAQ
-
Yes. Stacksync provides a managed, real-time two-way integration between Kustomer and Smartsheet: authenticate both systems, choose the objects to sync (such as Kustomer's Teams and Tags), map fields visually, and changes propagate both ways in milliseconds — no code required.
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Common patterns for Kustomer and Smartsheet: Where Smartsheet supplies contact or company data; Where Smartsheet can store CRM context: fields kept current. Enriched fields land directly on records in Kustomer, and refreshes keep them from going stale.
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Kustomer: REST API. Authentication: API key used as a bearer token, scoped by role. Smartsheet: REST API (v2.0). Authentication: OAuth 2.0 authorization-code flow, or a raw/personal API access token passed as a Bearer header. Stacksync manages authentication, retries, and rate limits on both sides.
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Smartsheet: Cell writes must match the column type (CONTACT_LIST, PICKLIST, DATE, CHECKBOX), so mappings have to respect each column's definition. Kustomer: Custom object types are called Klasses, and they are the standard mechanism for landing external data like orders and subscriptions where agents work. Stacksync's field mapping accounts for these differences between Kustomer and Smartsheet 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 Kustomer and Smartsheet 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 Kustomer and Smartsheet connectors, real-time two-way sync, monitoring, and support. That replaces building and maintaining a custom Kustomer–Smartsheet integration in-house.
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.
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
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