Real-time
Real-time sync
Changes in Lusha or Resend instantly reflect in both systems. No stale data, no manual imports.
Business productivity
Lusha to Resend integration — real-time data sync
Keep Lusha and Resend 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 Celigo
Why teams connect Lusha and Resend
Flow Lusha data into Resend in real time — no exports, no schedulers, no custom scripts.
Lusha is a read-only source: Stacksync reads its data in real time and delivers it into Resend, so Resend always reflects the current state of Lusha — without exports, scripts, or schedulers.
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 Person Profiles, Company Profiles, Email Addresses, Phone Numbers in Lusha with Email events, API keys, Emails, Contacts in Resend 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 Append firmographic company data to account records before territory or scoring runs.
- 02 Build prospecting lists from Lusha search results and sync them into the CRM as leads.
- 03 Write delivery, bounce, and complaint events back to the CRM or a Postgres table for deliverability reporting.
- 04 Trigger transactional sends when a row changes in an operational database, such as an order status update.
Common sync patterns
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.
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.
What you can sync between Lusha and Resend
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.
| Lusha objects | Resend objects | How this pairing syncs | |
|---|---|---|---|
| Company Profiles Firmographic records (industry, size, location) appended to account or company rows. | API keys Scoped credentials managed per environment for send and read access. | Company Profiles is specific to Lusha and API keys to Resend — each maps to any object or custom field on the other side. | |
| Email Addresses Work emails written into CRM contact fields during enrichment. | Emails Sent messages retrievable by ID with current delivery status. | Email Addresses is specific to Lusha and Emails to Resend — each maps to any object or custom field on the other side. | |
| Phone Numbers Direct-dial and mobile numbers appended for outbound calling workflows. | Contacts Recipient records with email, name, and subscription state, synced from CRMs or databases. | Phone Numbers is specific to Lusha and Contacts to Resend — each maps to any object or custom field on the other side. | |
| Prospecting Results Search-based lists of people and companies matching filters, used to seed lead lists. | Audiences Named contact lists that broadcasts target; typically mirrored from CRM segments. | Prospecting Results is specific to Lusha and Audiences to Resend — each maps to any object or custom field on the other side. | |
| Bulk Enrichment Requests Batch lookups that enrich multiple records per request, used to backfill large contact lists rather than one-off calls. | Broadcasts One-to-many campaign sends addressed to an audience. | Bulk Enrichment Requests is specific to Lusha and Broadcasts to Resend — each maps to any object or custom field on the other side. | |
| Person Profiles Contact-level enrichment results (work emails, phone numbers, title, company) returned per lookup. | Domains Verified sending domains with DNS and DKIM status. | Person Profiles is specific to Lusha and Domains to Resend — each maps to any object or custom field on the other side. |
How changes propagate between Lusha and Resend
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.
Lusha Resend Interval-based propagation
DetectionStacksync polls Lusha for changes on an incremental schedule, reading only records changed since the previous pass. Data is fetched on demand per lookup, so syncs poll or trigger enrichment when source records change.
DeliveryEach detected change is written to Resend through its API, with automatic retries and rate-limit backoff.
Resend Lusha Sub-second propagation
DetectionResend notifies Stacksync of record changes through webhook events. Webhooks for email lifecycle events.
DeliveryLusha does not accept inbound record writes, so this direction carries requests rather than records: Lusha's output flows back as field updates on the originating Resend records.
Rate-limit considerations
- Lusha: Lookups consume credits and are subject to the platform's API rate limits.
What ships with Lusha ⇄ Resend
Connect Lusha and Resend for flexible, real-time data sync.
Real-time sync, workflow automation, event queues, EDI, and monitoring, for every Lusha–Resend connection.
No-code + pro-code
Workflow automation
Trigger automated workflows whenever Lusha or Resend 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 Lusha or Resend record.
Observability
Monitoring
Track your Lusha ⇄ Resend sync health, view errors, and replay failed events in one click.
Trading partners
EDI
Transform legacy EDI complexity into simple database interactions between Lusha and Resend.
How the Lusha and Resend connectors work
Lusha
- Integration surface
- REST API
- Authentication
- API key
- Change detection
- Not event-driven; data is fetched on demand per lookup, so syncs poll or trigger enrichment when source records change
- Capabilities
- read
- Rate limits
- Lookups consume credits and are subject to the platform's API rate limits.
Resend
- Integration surface
- REST API
- Authentication
- API key (Bearer token)
- Change detection
- Webhooks for email lifecycle events; polling for contact and audience state
- Capabilities
- read · write · webhooks
How it works
How to connect Lusha to Resend — 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 Lusha and Resend with each platform's native method — OAuth, API keys, or service accounts — plus secure options like SSH tunneling, IP whitelisting, and VPC peering.
Lusha
connected
Resend
connected
OAuth 2.0SSH tunnelSSL certificateVPC peering - 02
Choose tables
Pick the Lusha and Resend 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 · Lusha ⇄ ResendCustomers 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.
Lusha ResendCompany company_name textEmail email textAmount amount numericCreated created_at timestamp
FAQ
Lusha and Resend integration FAQ
-
Yes. Stacksync provides a managed, real-time integration between Lusha and Resend — Lusha is a read-only source, so data flows from it into the other system: authenticate both systems, choose the objects to sync, map fields visually, and changes propagate in milliseconds — no code required.
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Lusha is a read-only source, so this integration runs one-way: Stacksync reads from Lusha in real time and delivers into Resend. Field mapping and monitoring work the same as for two-way pairs.
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Common patterns for Lusha and Resend: Handoffs between teams; Where both tools track people or companies: one consistent record; Where one tool produces events: mirror them in the other. When work started in one tool continues in the other, the shared fields travel with it automatically.
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Lusha: REST API. Authentication: API key. Resend: REST API. Authentication: API key (Bearer token). Stacksync manages authentication, retries, and rate limits on both sides.
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Lusha: Lusha is a lookup-style enrichment API, not a system of record: integrations send an identifier (such as email, LinkedIn URL, or name plus company) and receive matched contact data back. Resend: Built by the team behind React Email, so templates are commonly authored as React components rendered to HTML at send time. Stacksync's field mapping accounts for these differences between Lusha and Resend 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 Lusha and Resend records are not retained after a sync operation.
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
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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