Real-time
Two-way sync
Changes in Lemlist or Rillet instantly reflect in both systems. No stale data, no manual imports.
Business productivity ⇄ Accounting and finance
Lemlist to Rillet integration — real-time, two-way sync
Keep Lemlist and Rillet 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 Lemlist and Rillet
Connect the financial records in Rillet with the work happening in Lemlist, so both stay current without exports or copy-paste.
Rillet holds the financial truth: who the customers are, what they were billed, what they paid. Lemlist is where part of the day-to-day work happens, and that work often involves the same customers and transactions. Without a live connection, the two drift apart, and people end up answering questions from stale copies.
Stacksync keeps Invoice Payment, Charge, Reimbursement, Custom Field in Rillet and Team Members, Campaigns, Leads, Activities in Lemlist in sync, bi-directionally and in real time. Whatever records Lemlist keeps and whatever events it produces, the overlap with Rillet is mapped field by field, and a change on either side shows up on the other within seconds.
There is no middleware to build, no API rate limits to babysit, and no nightly job that leaves the morning running on yesterday's data.
Common use cases
- Keep customers and invoices aligned between Rillet and a CRM so finance and sales work from the same account records.
- Mirror journal entries and contract revenue data into a warehouse for board and ARR reporting.
- Push enriched leads from a warehouse or list-building workflow into Lemlist campaigns automatically
- Propagate unsubscribes and bounces back to the CRM and other outreach tools for suppression compliance
Where Lemlist collects payments or triggers charges: events land in Rillet
Payment and charge activity flows into Rillet as it happens, so the books reflect reality without manual reconciliation.
Where Lemlist tracks people or companies: one identity
A customer's details updated in either system update the other, so finance and the rest of the business stop maintaining two versions of the same customer.
Where Lemlist is a docs or knowledge workspace: reference data kept fresh
Figures teams rely on, like customer status or outstanding balances, stay current wherever Lemlist surfaces them instead of going stale after a one-time paste.
What you can sync between Lemlist and Rillet
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.
| Lemlist objects | Rillet objects | |
|---|---|---|
| Activities Engagement records such as opens, clicks, replies, and bounces sync to CRM timelines. | Invoice Synced with incremental and full sync per the Stacksync docs. | |
| Unsubscribes Opt-out records propagate to other outreach tools and the CRM for compliance. | Credit Memo Synced with incremental and full sync per the Stacksync docs. | |
| Webhooks Hook subscriptions define which activity events are pushed to external endpoints. | Bill Synced with incremental and full sync per the Stacksync docs. | |
| Team Members Sender and seat records map outreach activity to reps in other systems. | Journal Entry Synced with incremental and full sync per the Stacksync docs. | |
| Campaigns Outreach campaigns are the container leads are pushed into from CRMs and list-building workflows. | Invoice Payment Synced with incremental and full sync per the Stacksync docs. | |
| Leads Per-campaign prospect records sync in from enrichment sources and back out with status. | Charge Synced with incremental and full sync per the Stacksync docs. |
What ships with Lemlist ⇄ Rillet
Connect Lemlist and Rillet for flexible, real-time data sync.
Real-time sync, workflow automation, event queues, EDI, and monitoring, for every Lemlist–Rillet connection.
No-code + pro-code
Workflow automation
Trigger automated workflows whenever Lemlist or Rillet 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 Lemlist or Rillet record.
Observability
Monitoring
Track your Lemlist ⇄ Rillet sync health, view errors, and replay failed events in one click.
Trading partners
EDI
Transform legacy EDI complexity into simple database interactions between Lemlist and Rillet.
How the Lemlist and Rillet connectors work
Lemlist
- Integration surface
- REST API
- Authentication
- API key
- Change detection
- Webhooks on outreach activity events, plus polling
- Capabilities
- read · write · webhooks
- Rate limits
- Subject to the platform's API rate limits
Rillet
- Integration surface
- REST API (OpenAPI-specified, with production and sandbox environments)
- Authentication
- API key generated in Rillet (Organization Setting -> API Access); uncheck Read Only for bidirectional sync, check Read Only for one-way sync
- Change detection
- Near real-time updates via change tracking; incremental sync per object, with delete detection (some objects checked every 1h or 4h)
- Capabilities
- read · write · CDC · webhooks
- Rate limits
- Subject to the platform's API rate limits.
How it works
How to connect Lemlist to Rillet — 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 Lemlist and Rillet with each platform's native method — OAuth, API keys, or service accounts — plus secure options like SSH tunneling, IP whitelisting, and VPC peering.
Lemlist
connected
Rillet
connected
OAuth 2.0SSH tunnelSSL certificateVPC peering - 02
Choose tables
Pick the Lemlist and Rillet 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 · Lemlist ⇄ RilletCustomers 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.
Lemlist RilletCompany company_name textEmail email textAmount amount numericCreated created_at timestamp
FAQ
Lemlist and Rillet integration FAQ
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Yes. Stacksync provides a managed, real-time two-way integration between Lemlist and Rillet: authenticate both systems, choose the objects to sync (such as Lemlist's Activities and Unsubscribes), map fields visually, and changes propagate both ways in milliseconds — no code required.
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Yes. Each object mapping can be bidirectional or restricted to a single direction (both systems accept writes). Read-only mirrors, one-way pushes, and full two-way sync can be mixed in the same integration.
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Common patterns for Lemlist and Rillet: Where Lemlist collects payments or triggers charges: events land in Rillet; Where Lemlist tracks people or companies: one identity; Where Lemlist is a docs or knowledge workspace: reference data kept fresh. Payment and charge activity flows into Rillet as it happens, so the books reflect reality without manual reconciliation.
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Lemlist: REST API. Authentication: API key. Rillet: REST API (OpenAPI-specified, with production and sandbox environments). Authentication: API key generated in Rillet (Organization Setting -> API Access); uncheck Read Only for bidirectional sync, check Read Only for one-way sync. Stacksync manages authentication, retries, and rate limits on both sides.
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Rillet: Rillet is built for SaaS companies, with a general ledger organized around automated revenue recognition and month-end close. Lemlist: Activity events such as replies, opens, bounces, and unsubscribes can be delivered via webhooks, enabling near real-time updates to CRM records without polling every campaign. Stacksync's field mapping accounts for these differences between Lemlist and Rillet 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 Lemlist and Rillet records are not retained after a sync operation.
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:
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