Real-time
Two-way sync
Changes in Ironclad or Lemlist instantly reflect in both systems. No stale data, no manual imports.
Business productivity
Ironclad to Lemlist integration — real-time, two-way sync
Keep Ironclad and Lemlist 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
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Adopted by fast-scaling companies moving mission-critical data in real time
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Why teams connect Ironclad and Lemlist
Stop re-entering the same information in Ironclad and Lemlist: 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 Workflows, Records, Entities, Obligations in Ironclad with Team Members, Campaigns, Leads, Activities in Lemlist 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 Stream workflow approval and signature webhook events into an operational database for cycle-time, bottleneck, and SLA reporting across the contract lifecycle.
- 02 Push Obligations and renewal dates from Ironclad into a finance or task system so post-signature commitments and renewals are tracked and actioned on time.
- 03 Push enriched leads from a warehouse or list-building workflow into Lemlist campaigns automatically
- 04 Propagate unsubscribes and bounces back to the CRM and other outreach tools for suppression compliance
Common sync patterns
Where one tool produces events: mirror them in the other
Payments, replies, messages, or tickets created in one tool can create or update matching records in the other, keeping context in one place.
Where Lemlist is where the team documents or plans: keep its data fed
Information that originates in Ironclad stays current in Lemlist 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.
What you can sync between Ironclad and Lemlist
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.
| Ironclad objects | Lemlist objects | How this pairing syncs | |
|---|---|---|---|
| Webhooks Event subscriptions that push workflow, approval, signature, document, and comment changes to Stacksync in near real time; created, listed, and deleted through the API across 40+ event types. | Webhooks Hook subscriptions define which activity events are pushed to external endpoints. | Same entity on both sides — records pair one-to-one and field-level changes reconcile in both directions. | |
| Workflow Documents Draft and executed documents attached to a workflow; retrieved to pull generated or signed files out into a document store or archive. | Campaigns Outreach campaigns are the container leads are pushed into from CRMs and list-building workflows. | Workflow Documents is specific to Ironclad and Campaigns to Lemlist — each maps to any object or custom field on the other side. | |
| Workflows The core unit of Ironclad: a live contract process (NDA, MSA, order form) moving through creation, review, approval, and signature. Launched via POST, updated via PATCH, and read for status, so contract processes move two-way between Ironclad and a database, CRM, or ERP. | Leads Per-campaign prospect records sync in from enrichment sources and back out with status. | Workflows is specific to Ironclad and Leads to Lemlist — each maps to any object or custom field on the other side. | |
| Records The Repository of executed and stored contracts with metadata (value, counterparty, key dates, type) and attachments; full create, read, update, and delete so signed-contract data and PDFs sync to a warehouse, ERP, or CRM. | Activities Engagement records such as opens, clicks, replies, and bounces sync to CRM timelines. | Records is specific to Ironclad and Activities to Lemlist — each maps to any object or custom field on the other side. | |
| Entities Structured records for counterparties and other parties linked to workflows and records; read and written to keep company and vendor master data aligned with a CRM or ERP. | Unsubscribes Opt-out records propagate to other outreach tools and the CRM for compliance. | Entities is specific to Ironclad and Unsubscribes to Lemlist — each maps to any object or custom field on the other side. | |
| Obligations Post-signature commitments, milestones, and renewal dates tied to contracts; synced two-way to drive renewal, compliance, and finance reporting in downstream systems. | Team Members Sender and seat records map outreach activity to reps in other systems. | Obligations is specific to Ironclad and Team Members to Lemlist — each maps to any object or custom field on the other side. |
How changes propagate between Ironclad and Lemlist
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.
Ironclad Lemlist Sub-second propagation
DetectionIronclad notifies Stacksync of record changes through webhook events. Native webhook subscriptions (POST /webhooks) fire on 40+ workflow, approval, signature, document, and comment events, and Ironclad retries a failing.
DeliveryEach detected change is written to Lemlist through its API, with automatic retries and rate-limit backoff.
Lemlist Ironclad Sub-second propagation
DetectionLemlist notifies Stacksync of record changes through webhook events. Webhooks on outreach activity events, plus polling.
DeliveryEach detected change is written to Ironclad through its API, with automatic retries and rate-limit backoff.
Rate-limit considerations
- Ironclad: Limits are enforced per account per minute by endpoint: GET Workflows 400 and POST/PATCH Workflows 40; GET Records 600 and POST/PATCH Records 200; GET Entities 600 and POST/PATCH Entities 200; Webhooks 600; all other endpoints 800. Exceeding a limit returns HTTP 429, and Ironclad recommends exponential backoff with jitter.
- Lemlist: Subject to the platform's API rate limits.
What ships with Ironclad ⇄ Lemlist
Connect Ironclad and Lemlist for flexible, real-time data sync.
Real-time sync, workflow automation, event queues, EDI, and monitoring, for every Ironclad–Lemlist connection.
No-code + pro-code
Workflow automation
Trigger automated workflows whenever Ironclad or Lemlist 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 Ironclad or Lemlist record.
Observability
Monitoring
Track your Ironclad ⇄ Lemlist sync health, view errors, and replay failed events in one click.
Trading partners
EDI
Transform legacy EDI complexity into simple database interactions between Ironclad and Lemlist.
How the Ironclad and Lemlist connectors work
Ironclad
- Integration surface
- REST/JSON Public API (CLM API) at https://na1.ironcladapp.com/public/api/v1 (NA1 and EU1 regions plus a demo/sandbox), with a native Webhooks subscription API; described by an OpenAPI 3.1 spec.
- Authentication
- OAuth 2.0 - Authorization Code grant (PKCE for public clients) and Client Credentials grant for server-to-server; access tokens are Bearer, expire after 6 hours, and every endpoint is gated by a resource scope. The legacy static API bearer token was deprecated on 2024-11-22.
- Change detection
- Native webhook subscriptions (POST /webhooks) fire on 40+ workflow, approval, signature, document, and comment events, and Ironclad retries a failing endpoint up to 10 times over about 13.6 hours with exponential backoff. Otherwise poll the list endpoints by last-updated. There is no database change-data-capture log.
- Capabilities
- read · write · webhooks
- Rate limits
- Limits are enforced per account per minute by endpoint: GET Workflows 400 and POST/PATCH Workflows 40; GET Records 600 and POST/PATCH Records 200; GET Entities 600 and POST/PATCH Entities 200; Webhooks 600; all other endpoints 800. Exceeding a limit returns HTTP 429, and Ironclad recommends exponential backoff with jitter.
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
How it works
How to connect Ironclad to Lemlist — 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 Ironclad and Lemlist with each platform's native method — OAuth, API keys, or service accounts — plus secure options like SSH tunneling, IP whitelisting, and VPC peering.
Ironclad
connected
Lemlist
connected
OAuth 2.0SSH tunnelSSL certificateVPC peering - 02
Choose tables
Pick the Ironclad and Lemlist 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 · Ironclad ⇄ LemlistCustomers 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.
Ironclad LemlistCompany company_name textEmail email textAmount amount numericCreated created_at timestamp
FAQ
Ironclad and Lemlist integration FAQ
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Yes. Stacksync provides a managed, real-time two-way integration between Ironclad and Lemlist: authenticate both systems, choose the objects to sync (such as Ironclad's Webhooks and Workflow Documents), map fields visually, and changes propagate both ways in milliseconds — no code required.
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Ironclad: Rate limits are per account per minute and differ by endpoint - for example GET Records is 600/min but POST/PATCH Workflows only 40/min - and exceeding one returns HTTP 429. 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 Ironclad and Lemlist 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 Ironclad and Lemlist 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 Ironclad and Lemlist connectors, real-time two-way sync, monitoring, and support. That replaces building and maintaining a custom Ironclad–Lemlist integration in-house.
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Yes — Stacksync ships production-grade connectors for both Ironclad and Lemlist. 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 Ironclad: Native webhook subscriptions (POST /webhooks) fire on 40+ workflow, approval, signature, document, and comment events, and Ironclad retries a failing endpoint up to 10 times over about 13.6 hours with exponential backoff. Otherwise poll the list endpoints by last-updated. There is no database change-data-capture log. On Lemlist: Webhooks on outreach activity events, plus polling. Each detected change propagates to the other side in milliseconds, with field-level conflict resolution and an inspectable event log.
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:
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