CRM migration

Migrate from ResMan to Twenty CRM

Field-level mapping, validation, and rollback between ResMan and Twenty CRM. We move data and schema; workflows are rebuilt natively in Twenty CRM.

ResMan logo

ResMan

Source

Twenty CRM

Destination

Twenty CRM logo

Compatibility

100%

10 of 10

objects map 1:1 between ResMan and Twenty CRM.

Complexity

BStandard

Timeline

48–72 hours

Rollback included Accuracy guarantee Field-level validation

Overview

What this migration involves

ResMan is a property management SaaS platform built around properties, units, tenants, leases, payments, and maintenance tickets. Twenty CRM is a modern open-source CRM with People, Companies, and Opportunities as its primary objects — it has no native concept of a unit, a lease term, or a work order. We bridge that gap by mapping ResMan tenants to Twenty People, ResMan properties to Twenty Companies (or custom Property objects for multi-unit portfolios), and ResMan leases to Twenty Opportunities with stage pick-list values matching your lease lifecycle. ResMan's accounting ledger, utility billing, and payment schedule data have no direct equivalent in Twenty — we preserve those as custom fields on the relevant Opportunity and People records and surface a rebuild reference document for your team. Our migration engine pulls from ResMan's REST API, transforms records into Twenty's CSV import format, creates any missing custom objects and fields in your Twenty workspace via the GraphQL API, and runs the import sequence: Companies first, then People (with companyId relations), then Opportunities, then custom objects with their own relations. Activity history — notes, tasks, and communications logged on tenants or leases — migrates as Notes and Tasks linked to the corresponding People or Opportunity records. Workflows, automations, integration connections, and the accounting ledger do not migrate and are documented in a rebuild-reference export that your team uses to reconfigure Twenty's workflow builder post-import.

Field-level fidelity

Every standard and custom field arrives verified.

Schema-aware mapping

AI proposes the map; you confirm before any record moves.

Relationships preserved

Parent–child, lookups, and ownership stay linked.

Full activity history

Calls, emails, meetings — with original timestamps.

Attachments & notes

Documents, uploads, and inline notes move with the record.

Why teams make this switch

Two sides of the same decision

Leaving

ResMan logo

ResMan

What's pushing teams away

  • Bulk text template creation requires manual setup for each new template, feeling clunky compared to native CRM automation workflows
  • Utility billing charges generate at move-out with real-time calculations that some operators find difficult to reconcile without support
  • Reporting customization is powerful but the learning curve for building complex custom reports frustrates users without dedicated analyst support
  • Integration with third-party screening and payment platforms requires separate vendor management that mid-sized operators find fragmented

Choosing

Twenty CRM logo

Twenty CRM

What's pulling them in

  • Top open-source CRM on GitHub with 40.6K stars, giving teams full source code access and infrastructure ownership without per-feature licensing surprises.
  • Free self-hosting under AGPL-3.0 means unlimited users and custom objects for the cost of cloud infrastructure alone, typically $20–100/month.
  • Pricing page explicitly mocks competitors for charging add-on fees for API access, webhooks, and workflows — transparency that resonates with RevOps teams burned by Salesforce.
  • Unlimited custom objects and fields with no price impact, letting teams shape the data model to their business rather than forcing business into rigid schemas.
  • Modern TypeScript/React/PostgreSQL stack means developer-led teams can extend, self-host, or integrate without fighting legacy architecture.

Object mapping

How ResMan objects map to Twenty CRM

Each row shows how a ResMan object lands in Twenty CRM, including any object-level transformations, lookup resolution, or schema-design dependencies.

Typical mapping — final map is confirmed during the sample migration step.

ResMan

Property

maps to

Twenty CRM

Company + custom Property object (optional)

1:1
Fully supported

ResMan Properties map to Twenty Companies because both represent organizations with a name, address, and industry. If the property portfolio has multi-unit buildings, we create a custom 'Property' object in Twenty keyed by the ResMan property ID and link Units to it. Property-level custom fields (InsurancePolicy, ZoningType, YearBuilt) migrate as custom fields on the Company or custom Property record.

ResMan

Unit

maps to

Twenty CRM

Custom 'Unit' object or custom fields on Company

1:1
Fully supported

Twenty has no standard Unit or RentalObject entity. We create a custom 'Unit' object with fields: UnitNumber (text), FloorPlan, SquareFootage, Bedrooms, Bathrooms, MarketRent, Status (Vacant/Occupied). The Unit links back to the parent Property via a relation field. Units without a parent Property default to the Property record's address. This requires creating the custom object schema in Twenty Settings → Data Model before the import sequence runs.

ResMan

Tenant / Applicant

maps to

Twenty CRM

People

1:1
Fully supported

ResMan Tenants and Applicants both map to Twenty People. Contact details (name, email, phone) migrate directly. Applicant-stage records (pre-lease) land in Twenty People with a custom ApplicantStatus__c pick-list field ('Screening', 'Approved', 'Denied'). Tenants who have signed a lease link to the corresponding Opportunity via the opportunityId relation that we populate during the Opportunity import step.

ResMan

Lease

maps to

Twenty CRM

Opportunity

1:1
Fully supported

ResMan Leases map to Twenty Opportunities — this is the core of the migration. LeaseStage ('Pending', 'Active', 'Month-to-Month', 'Ended') maps to Twenty Opportunity StageName values (we configure the pick-list in Twenty's Data Model before import). MonthlyRent maps to Opportunity Amount. LeaseStartDate and LeaseEndDate map to CloseDate (use end date as the close date for pipeline reporting) and a custom LeaseStartDate__c field. LeaseID is stored as Source_System_Lease_ID__c for delta-run de-duplication.

ResMan

Lease Payment

maps to

Twenty CRM

Custom fields on Opportunity + Activity (Note)

1:1
Fully supported

Twenty has no accounting ledger. Each lease's payment status (last paid date, balance due, late fees) migrates as custom fields on the Opportunity record: LastPaymentDate__c, BalanceDue__c, PaymentStatus__c. Payment history detail (each ACH transaction) is too granular for a CRM; we export it as a CSV rebuild reference and link a Note record with a summary table to the Opportunity for auditability.

ResMan

Work Order / Maintenance Ticket

maps to

Twenty CRM

Custom 'WorkOrder' object + Task

1:1
Fully supported

ResMan maintenance tickets map to a custom 'WorkOrder' object with fields: Subject, Description, Priority (Low/Medium/High/Emergency), Status (Open/InProgress/Complete), Category, AssignedVendor, CreatedDate. Open work orders import as active records; closed ones import with Status='Complete' and CompletedDate__c. If the tenant contact exists in Twenty People, the WorkOrder links to it via a relation field. We do not migrate internal notes from the vendor communication thread — only the structured ticket fields and the final resolution note.

ResMan

Document / Lease Agreement File

maps to

Twenty CRM

Note with file attachment

1:1
Fully supported

Twenty CSV import does not include file attachments. We export ResMan lease agreements, addenda, and tenant documents as a ZIP archive and generate a Note record per document with the original filename, document type, and a link to the archive. Re-upload of the actual files must be done manually in Twenty's Command Menu → Files, or via the GraphQL file upload endpoint. This is disclosed honestly — FlitStack does not promise automatic file migration.

ResMan

ResMan Owner / Property Manager

maps to

Twenty CRM

Workspace Member / People (with role)

1:1
Fully supported

ResMan owner and property manager users resolve by email match against Twenty workspace members. We invite the matched users before the migration so OwnerId fields on WorkOrders and Opportunities populate correctly. Unmatched owners are flagged in the pre-flight report and can be invited before the final run. Owner records without a corresponding Twenty account default to a fallback 'Unassigned' placeholder.

ResMan

Applicant / Prospect Inquiry

maps to

Twenty CRM

People (with Opportunity if a tour was scheduled)

1:1
Fully supported

Prospect inquiries in ResMan (often captured via the website lead form) map to Twenty People with a custom Source__c field = 'ResMan Inquiry'. If the prospect was associated with a specific unit and had a scheduled tour recorded in ResMan, we create an Opportunity linked to the unit and the prospect with StageName = 'Tour Scheduled' so your Twenty pipeline reflects the prospect pipeline from the start.

ResMan

Inspection Record

maps to

Twenty CRM

Custom 'Inspection' object or Note on the related Unit

1:1
Fully supported

ResMan inspection records (move-in, move-out, annual) have no direct Twenty equivalent. We create a custom 'Inspection' object with fields: InspectionType, ScheduledDate, CompletedDate, OverallCondition, UnitId (relation), TenantId (relation), and findings as a rich-text Note field. The inspection date timeline is preserved for compliance reporting. If the inspection triggered a work order, we link the Inspection record to the related WorkOrder via a relation field.

Gotchas + challenges

What specifically takes care here

Platform-specific issues from each side, plus the pair-specific challenges that don't show up on either platform's page on its own.

ResMan logo

ResMan gotchas

Medium

Utility billing charges are calculated at move-out in real time

Medium

Section 8 subsidy data requires compliance-specific field mapping

Low

Bulk text templates are not auto-saved from organic conversations

Low

Custom report definitions are proprietary and not portable

Medium

Integration ecosystem creates data in third-party systems

Twenty CRM logo

Twenty CRM gotchas

High

Import order is enforced and critical

High

Export limited to 20,000 records and visible columns only

Medium

Soft-deleted records count toward uniqueness and trigger restores

Medium

API rate limits cap at 200 req/min on Organization tier

Low

No native email sequences — follow-up cadences require external tools

Pair-specific challenges

  • ResMan's accounting ledger has no Twenty CRM equivalent and must be rebuilt as custom fields

    ResMan's payment schedule, ACH transaction history, late fee assessments, and utility billing splits are a financial subsystem, not CRM data. Twenty CRM has no native accounting module. FlitStack migrates the current balance, last payment date, and lease security deposit as custom fields on the Opportunity record, and exports the full transaction history as a CSV rebuild reference. The actual accounting — rent rolls, AR aging reports, and payment posting workflows — must be rebuilt in an accounting tool or as a custom object with a rebuild-reference document. This is a structural limitation of moving from a property management ERP to a CRM, not a data loss bug.

  • ResMan's multi-unit hierarchy requires a custom Unit object in Twenty that must be created before import

    ResMan structures properties with N Units under a single Property record, each with its own rent, floor plan, and occupancy status. Twenty's standard Company object has no unit concept. We create a custom 'Unit' object in Twenty Settings → Data Model before the migration runs, with a relation field back to the parent Company. If your ResMan portfolio has more than 20 unit types or non-standard unit naming conventions, the custom Unit object schema needs validation against Twenty's field-type constraints (select pick-lists max out at 300 values per field). We surface this schema plan in the pre-flight report so you can review and approve before we touch your workspace.

  • Twenty CSV import requires pre-created fields — fields must exist before records land

    Twenty's CSV import creates records but not fields. Every custom field referenced in a CSV column must already exist in the Data Model at import time. If we discover a custom field in ResMan (e.g., Section8VoucherNumber__c) that was not pre-created in Twenty, the import skips that column and the data is lost unless caught in QA. We audit the ResMan schema first, create all required custom fields in Twenty via the GraphQL API before the import run, and verify field existence in a dry-run against a sandbox workspace when available. This sequence is documented in the pre-flight schema plan we deliver before migration day.

  • File attachments (lease PDFs, inspection photos, vendor contracts) do not migrate via CSV

    Twenty's CSV import function does not handle binary file uploads. ResMan documents attached to tenants, leases, units, or work orders cannot be automatically transferred. We export the document manifest (filename, document type, associated record ID) and produce a ZIP archive of the files. After the migration, documents must be manually linked to the corresponding People, Company, or Opportunity records via Twenty's Command Menu → Files upload, or batch-uploaded via the GraphQL file upload endpoint. We document the mapping between each ResMan document ID and its Twenty record target so your team can complete this step systematically.

  • Twenty Pro tier limits API calls to 100/min — large portfolios require pagination tuning

    Twenty Pro (Cloud, $9/user/month) caps API throughput at 100 requests per minute. The Organization tier doubles this to 200/min. For ResMan accounts with more than 5,000 records spanning Properties, Units, Tenants, Leases, and WorkOrders, a direct bulk upsert via the Twenty REST API can hit rate limits during the migration window. FlitStack implements request pacing with exponential backoff, batch-sizes the upsert calls to stay within the per-minute limit, and falls back to CSV import for the largest objects (Units and WorkOrders) where supported. If your migration exceeds 50,000 total records, we recommend upgrading to the Organization tier for the migration window to avoid throughput constraints.

Migration approach

Six steps for a successful ResMan to Twenty CRM data migration

  1. Audit ResMan schema and Twenty workspace readiness

    We connect to the ResMan API with read-only credentials and enumerate every active object: Properties, Units, Tenants, Leases, WorkOrders, Inspections, and any custom fields configured in ResMan's property management setup. We simultaneously audit the target Twenty workspace — confirming which custom objects and fields already exist and which must be created. We produce a pre-flight schema plan: a field-by-field diff showing which ResMan fields map to existing Twenty fields, which need new custom fields, and which require a custom object (e.g., Unit, WorkOrder). Your team reviews and approves the plan before we proceed.

  2. Create Twenty custom objects and fields via GraphQL API

    Before any records move, we create the custom Unit and WorkOrder objects and all missing custom fields in Twenty's Data Model using the GraphQL API. This includes setting pick-list values for StageName (mapped from ResMan LeaseStage), Priority__c, Status__c on WorkOrders, and all custom currency, date, and text fields. We configure these in a specific sequence: first the objects that other objects reference (Company), then the relation fields on dependent objects (Unit → Company, WorkOrder → People), then the scalar fields. If your Twenty workspace is on the Pro tier, we confirm API rate-limit headroom before writing the schema.

  3. Export ResMan data and transform to Twenty CSV format

    We pull the full dataset from ResMan's REST API: Properties, Units, Tenants, Leases, WorkOrders, Inspections, and any custom property fields. Each record is transformed into the Twenty CSV schema: People, Company, Opportunity, and custom object records with the correct column headers. Relations are resolved at this stage — ResMan TenantIDs are replaced with the Twenty People record IDs, PropertyIDs with Twenty Company IDs, and Unit.parentPropertyId with the parent Company's ID. The transformed CSVs are validated against the Twenty import template, with column-header mismatches flagged before upload.

  4. Run a sample import on a test slice and generate field-level diff

    A representative slice — typically 200–500 records spanning one property, its units, 10–20 tenants, 5–10 leases, and 3–5 work orders — is imported first. We generate a field-level diff: source field values from ResMan mapped against the resulting Twenty record values. You can verify that lease stages mapped correctly to Opportunity StageName, that Section 8 flags landed in the custom checkbox, and that Unit records link to the correct parent Company. We iterate on the transformation logic until the diff is clean before committing to the full run.

  5. Full migration with delta-pickup and post-migration QA

    The full dataset imports in the correct sequence: Companies first (the 'one' side of relations), then People with companyId links, then Opportunities with both peopleId and companyId, then custom Unit and WorkOrder records with their relations. During the cutover window, your team continues working in ResMan — we use scoped read access only. A delta-pickup (24–48 hours) captures any records created or modified after the initial export. After import, we run QA checks: record counts by object, null-rate on required fields, relation integrity (People → Company, WorkOrder → People), and duplicate detection on email and name. We deliver the document manifest ZIP for manual file re-upload and the payment-history CSV for accounting rebuild reference.

Platform deep dives

Context on both ends of the pair

ResMan logo

ResMan

Source

Strengths

  • Integrated accounting, leasing, maintenance, and CRM modules eliminate separate software stacks
  • Strong Section 8 and affordable housing compliance tracking with detailed resident subsidy management
  • Responsive customer support with high satisfaction ratings across G2 and Capterra reviewers
  • Customizable reporting engine for property-level financial and operational insights
  • Modern website and lead management with integrated chatbot and contact center capabilities

Weaknesses

  • Utility billing and vacating charge calculations create complex migration mapping requirements
  • Bulk text template workflow requires manual template creation, limiting automation scalability
  • Custom report definitions do not export and must be manually rebuilt on destination platforms
  • Contact center and chatbot data are not structured for migration to standard CRM systems
  • Integration ecosystem requires ongoing vendor management for screening and payment platforms
Twenty CRM logo

Twenty CRM

Destination

Strengths

  • AGPL-3.0 open-source license with full source code on GitHub — no vendor lock-in, no sunset risk.
  • Unlimited users and unlimited custom objects on self-hosted, with no feature gating based on headcount.
  • REST and GraphQL APIs available on all paid tiers, not locked behind an enterprise add-on fee.
  • MCP server and webhooks shipped as standard features, not premium upgrades.
  • Modern PostgreSQL-backed data model that developer teams can query, extend, and self-host.

Weaknesses

  • Recent v1.0 release means limited production hardening compared to CRMs with multi-year operational track records.
  • No native email sequencing or sales engagement tools — follow-up cadences require a separate platform.
  • No native two-way email sync or inbox integration, requiring third-party connectors for full activity logging.
  • Self-hosting 'free' pricing hides real infrastructure and DevOps costs that stack up over time.
  • Workflow automation is functional but lacks the complexity needed for sophisticated multi-step sales motions.

Complexity grading

How hard is this migration?

Standard CRM migration. 1 of 8 objects need a mapping; the rest are 1:1.

B

Overall complexity

Standard migration

Derived from compatibility, mapping clarity, API constraints, and data volume across ResMan and Twenty CRM.

  • Object compatibility

    B

    1 of 8 objects need a mapping; the rest are 1:1.

  • Field mapping clarity

    C

    Field mapping is derived from defaults — final spec confirmed during the sample migration.

  • Timeline complexity

    B

    8-object category — typical timelines run 2–7 days end-to-end.

  • API constraints

    B

    ResMan: Not publicly documented; partner tier restrictions apply.

  • Data volume sensitivity

    A

    ResMan exposes a bulk API — large-volume migrations stream efficiently.

Estimator

Estimate your ResMan to Twenty CRM migration cost

Rule-based pricing — no per-record fees, no manual quotes. Migrations over 2M records are scoped individually.

Step 1

What are you migrating?

Pick a category, then your source and destination platforms.

Category

FAQ

Frequently asked questions about ResMan to Twenty CRM data migrations

Answers to the questions buyers ask most during ResMan to Twenty CRM migration scoping. Not seeing yours? Book a call.

Can't find your answer?

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Book a free 30 minute consultation

Most ResMan to Twenty migrations complete within 48–72 hours of clock time for accounts with fewer than 10,000 records across all objects. The pre-flight schema audit and custom object creation add 1–2 days of preparation. Complex migrations with large unit counts, extensive custom fields, or a delta-pickup window for in-flight lease signings extend to 5–7 days. The timeline is driven by portfolio size (number of properties × units) and how many custom objects need schema creation in Twenty before data lands.

Adjacent paths

Related migrations to explore

Ready when you are

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