Real-time
Two-way sync
Changes in Bill or Kommo instantly reflect in both systems. No stale data, no manual imports.
Accounting and finance ⇄ CRM
Bill to Kommo integration — real-time, two-way sync
Keep Bill and Kommo 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 Celigo
Migrated from Heroku Connect
Migrated from Matillion
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Migrated from Fivetran
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Migrated from Celigo
Why teams connect Bill and Kommo
Sync customers, invoices, and payment status between Bill and Kommo in real time, so sales sees the money and finance sees the relationship.
Finance and sales describe the same customers in different systems. Kommo knows the relationship: who the contacts are and what is in motion with the account. Bill knows the money: what was invoiced, what was paid, what is overdue. When the two are connected only by exports, each side works partly blind.
Stacksync links Bills, Vendors, Invoices, Customers in Bill to Users, Chats, Leads, Contacts in Kommo with bi-directional, real-time sync. New customers, updated billing details, invoice status, and payment activity move in whichever direction you configure, field by field, with conflicts resolved by rules you set. The result is one version of each customer, visible from both sides.
Common use cases
- 01 Read approved Bills and their line items into a Postgres warehouse for spend, accrual, and cash-flow reporting without CSV exports.
- 02 Sync Customers and Invoices from BILL AR into a CRM or ERP so sales and finance see billing and payment status on the account.
- 03 Replicate Kommo leads and contacts into a database or warehouse for reporting beyond built-in dashboards
- 04 Push web form and product signups into Kommo pipelines as they are submitted so messenger-based follow-up starts quickly
Common sync patterns
Payment status on the account
Invoice and payment status from Bill appears on the account in Kommo, so reps see overdue balances before they promise the next order.
Billing detail changes flow back
When a contact or address is corrected in Kommo, Bill gets the update before the next invoice goes out.
Collections with context
Finance sees the account owner and relationship history from Kommo when chasing a balance, and sales sees that the chase is happening.
What you can sync between Bill and Kommo
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.
| Bill objects | Kommo objects | How this pairing syncs | |
|---|---|---|---|
| Invoices Accounts-receivable invoices sent to customers; created and read via /v3/invoices to keep billing status aligned with the ERP or CRM. | Notes Free-text and system notes attach context to synced leads and contacts. | Invoices is specific to Bill and Notes to Kommo — each maps to any object or custom field on the other side. | |
| Customers AR customer master records; mapped to customer/account records in a CRM or ERP so finance and sales share one view. | Custom Fields Per-entity custom fields hold data written from external databases and enrichment. | Customers is specific to Bill and Custom Fields to Kommo — each maps to any object or custom field on the other side. | |
| Payments Outgoing vendor payments and received customer payments; read for reconciliation and created to schedule bill pay. | Users Account users map lead ownership to people in other systems. | Payments is specific to Bill and Users to Kommo — each maps to any object or custom field on the other side. | |
| Chart of Accounts GL accounts used to code bills and invoices; typically mastered in the accounting system and written into BILL for consistent coding. | Chats Messenger conversations from WhatsApp, Instagram, and other channels attach to leads and contacts. | Chart of Accounts is specific to Bill and Chats to Kommo — each maps to any object or custom field on the other side. | |
| Bank Accounts Funding and deposit accounts; read to reconcile payments and posted transactions against the ledger. | Leads The central pipeline record; external signups and form fills sync in as leads. | Bank Accounts is specific to Bill and Leads to Kommo — each maps to any object or custom field on the other side. | |
| Vendor Credits and Credit Memos AP and AR adjustments applied against bills and invoices; synced so balances stay accurate on both sides. | Contacts Person records sync with other CRMs and databases for a shared contact file. | Vendor Credits and Credit Memos is specific to Bill and Contacts to Kommo — each maps to any object or custom field on the other side. |
How changes propagate between Bill and Kommo
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.
Bill Kommo Sub-second propagation
DetectionBill notifies Stacksync of record changes through webhook events. Webhook event subscriptions (POST /v3/subscriptions) for bills, vendors, payments, invoices, and bank accounts, with polling on.
DeliveryEach detected change is written to Kommo through its API, with automatic retries and rate-limit backoff.
Kommo Bill Sub-second propagation
DetectionKommo notifies Stacksync of record changes through webhook events. Webhooks on record add and update events, plus polling for backfill.
DeliveryEach detected change is written to Bill through its API, with automatic retries and rate-limit backoff.
Rate-limit considerations
- Bill: 20,000 requests per developer key per hour; login (POST /v3/login) capped at 200/hour; maximum 3 concurrent requests per developer key per organization. Spend & Expense API is a separate token at 60 calls/token/minute.
- Kommo: Subject to per-account request rate limits.
What ships with Bill ⇄ Kommo
Connect Bill and Kommo for flexible, real-time data sync.
Real-time sync, workflow automation, event queues, EDI, and monitoring, for every Bill–Kommo connection.
No-code + pro-code
Workflow automation
Trigger automated workflows whenever Bill or Kommo 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 Bill or Kommo record.
Observability
Monitoring
Track your Bill ⇄ Kommo sync health, view errors, and replay failed events in one click.
Trading partners
EDI
Transform legacy EDI complexity into simple database interactions between Bill and Kommo.
How the Bill and Kommo connectors work
Bill
- Integration surface
- REST/JSON (BILL v3 Connect API)
- Authentication
- Session-based: POST /v3/login with username, password, organizationId, and a developer key (devKey) returns a sessionId that is passed with the devKey as headers on every subsequent call; OAuth is available for partner/embedded apps
- Change detection
- Webhook event subscriptions (POST /v3/subscriptions) for bills, vendors, payments, invoices, and bank accounts, with polling on createdTime/updatedTime list filters as the fallback
- Capabilities
- read · write · webhooks
- Rate limits
- 20,000 requests per developer key per hour; login (POST /v3/login) capped at 200/hour; maximum 3 concurrent requests per developer key per organization. Spend & Expense API is a separate token at 60 calls/token/minute.
Kommo
- Integration surface
- REST API
- Authentication
- OAuth 2.0 with refresh tokens
- Change detection
- Webhooks on record add and update events, plus polling for backfill
- Capabilities
- read · write · webhooks
- Rate limits
- Subject to per-account request rate limits
How it works
How to connect Bill to Kommo — 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 Bill and Kommo with each platform's native method — OAuth, API keys, or service accounts — plus secure options like SSH tunneling, IP whitelisting, and VPC peering.
Bill
connected
Kommo
connected
OAuth 2.0SSH tunnelSSL certificateVPC peering - 02
Choose tables
Pick the Bill and Kommo 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 · Bill ⇄ KommoCustomers 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.
Bill KommoCompany company_name textEmail email textAmount amount numericCreated created_at timestamp
FAQ
Bill and Kommo integration FAQ
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Yes. Stacksync provides a managed, real-time two-way integration between Bill and Kommo: authenticate both systems, choose the objects to sync (such as Bill's Invoices and Customers), map fields visually, and changes propagate both ways in milliseconds — no code required.
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Common patterns for Bill and Kommo: Payment status on the account; Billing detail changes flow back; Collections with context. Invoice and payment status from Bill appears on the account in Kommo, so reps see overdue balances before they promise the next order.
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Bill: REST/JSON (BILL v3 Connect API). Authentication: Session-based: POST /v3/login with username, password, organizationId, and a developer key (devKey) returns a sessionId that is passed with the devKey as headers on every subsequent call; OAuth is available for partner/embedded apps. Kommo: REST API. Authentication: OAuth 2.0 with refresh tokens. Stacksync manages authentication, retries, and rate limits on both sides.
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Bill: BILL exposes separate AP and AR object sets plus a distinct Spend & Expense API that uses its own token and a lower 60-calls-per-minute limit. Kommo: The API uses OAuth 2.0 with short-lived access tokens refreshed via refresh tokens, and supports webhooks on record lifecycle events. Stacksync's field mapping accounts for these differences between Bill and Kommo 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 Bill and Kommo 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 Bill and Kommo connectors, real-time two-way sync, monitoring, and support. That replaces building and maintaining a custom Bill–Kommo 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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