API integrations · Use case
CRM Integration: Stop Double-Entry Between Systems
Wire your CRM to the rest of the stack — accounting, marketing, support, the bespoke systems — so data stops getting copied between tabs and your team stops being the integration layer.
The problem
What we usually see when a crm integration reaches out.
Most operations have a CRM as the supposed source of truth and a half-dozen other systems where the actual work happens — accounting, support, marketing automation, billing, custom platforms, spreadsheets. Without proper integration, the team becomes the integration layer: copy-pasting between tabs, reconciling lists, fielding "where's that lead" questions in Slack. By the time the operation feels the cost, it's usually a full FTE's worth of hours per month.
The landscape
Where the gap lives.
Every business above $2M revenue runs on at least 8-10 systems: CRM, accounting, marketing automation, support tooling, payment processing, billing, document storage, communication, project management, and one or two industry-specific platforms. Each makes sense in isolation. The problem isn't any individual tool — it's the integration layer between them.
Three common failure modes. First: no integration, so the team copy-pastes data between tabs ("the integration layer is people"). Second: lightweight Zapier or Make.com flows that work in good weather and break silently when an input shape shifts. Third: enterprise integration platforms (Workato, MuleSoft) that work but cost more than the underlying SaaS does. Most businesses sit in mode 1 or 2, paying the hidden tax of unreliable sync without realising the size of it.
Proper integration is unglamorous engineering: idempotent updates so the same event processed twice doesn't create duplicate records, retry logic with exponential backoff for transient failures, conflict resolution when two systems update the same record, observability so you know when something silently broke, and explicit schemas so a field rename in one system doesn't corrupt the other. None of that is hard. It's the boring engineering that separates "this works" from "this is a system you can run a business on".
Our approach
How we think about it.
Map the actual flow of data — what creates a record where, what should sync where, what's a one-way dependency vs. a two-way sync. Then build the integration layer that handles the boring reliability work: idempotent updates, retry on failure, observability so you know when something silently broke. We don't use Zapier for anything load-bearing — fine for prototypes, not for systems your business runs on.
Why bespoke
Where off-the-shelf falls short.
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Zapier / Make.com break silently and don't handle race conditions — fine for prototypes, not for load-bearing flows
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Native CRM integrations are usually shallow — covering the obvious fields and missing the bespoke logic
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Two-way sync requires explicit conflict resolution that no-code tools don't provide
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Custom webhook infrastructure for non-standard events doesn't exist in templated integration platforms
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Enterprise iPaaS (Workato, MuleSoft, Boomi) costs more than the underlying SaaS for most mid-market operations
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Data residency, audit logging, and rate limiting at production scale require bespoke infrastructure
What we typically build
Concrete examples.
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HubSpot / Salesforce / Pipedrive / GoHighLevel / ActiveCampaign integrations into the rest of your stack
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Two-way sync between CRM and Xero / MYOB / accounting with conflict resolution
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Marketing automation (Klaviyo, Mailchimp, ActiveCampaign) wired to CRM lifecycle stages
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Support platform (Intercom, Zendesk, HelpScout) connected to CRM for full customer view
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Lead-to-customer journey instrumentation across the stack
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Custom webhook infrastructure for events that don't fit a SaaS template
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GoHighLevel implementations and integrations done right the first time
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Identity / SSO bridge between systems for unified user management
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Data warehouse layer (BigQuery, Snowflake) when reporting across the stack matters
Common integrations
Platforms we typically connect.
Platforms we typically integrate with for this kind of work. The list isn't exhaustive — if it has an API or webhook, we can connect to it.
HubSpot
Most-used CRM in our integration work — strong API, broad ecosystem
Integration page →
Salesforce
Enterprise CRM with extensive integration but governor-limit traps to navigate
Integration page →
Pipedrive
Sales-pipeline-focused CRM, common in SMB and tech-enabled services
Integration page →
GoHighLevel
All-in-one CRM popular with agencies and growth-marketing businesses
Integration page →
ActiveCampaign
Marketing automation with built-in CRM, strong sequence design
Integration page →
Mailchimp
Email marketing platform — common for ecommerce and SMB
Integration page →
Klaviyo
Behavioural-trigger email and SMS for ecommerce
Integration page →
ConvertKit
Creator-focused email platform with good API for content businesses
Integration page →
Xero
Australian accounting standard — almost every CRM integration touches this
Integration page →
MYOB
Alternative accounting platform with significant legacy footprint
Integration page →
QuickBooks
Accounting common with US-Australia cross-border operations
Integration page →
Stripe
Payment processing with deep integration into CRM lifecycle events
Integration page →
Square
Alternative payments, common in retail and trades businesses
Integration page →
Twilio
SMS and voice for CRM-driven communication automation
Integration page →
Slack
Notification surface and team communication tied to CRM events
Integration page →
Microsoft 365
Outlook calendar / email integration for CRM-driven workflows
Integration page →
Google Workspace
Alternative office stack with similar integration patterns
Integration page →
Calendly
Booking integration tied to CRM lifecycle stages
Integration page →
n8n
Self-hosted workflow automation when data residency or volume matters
Integration page →
Make
Low-code orchestration for lower-volume cross-system flows
Integration page →
Don't see what you use? See the full integrations catalogue or tell us what you run — if it has an API, we connect to it.
Services involved
What this draws on.
API Integrations
Wire your business systems together so data flows automatically — no more copy-paste.
Typical projects $8K–$45K
Custom Web Apps
Custom-built web applications when off-the-shelf SaaS forces you to compromise.
Typical projects $20K–$120K
GoHighLevel
Strategic GoHighLevel implementations for agencies and growth businesses serious about systemising sales and marketing.
Typical engagements $5K–$20K
Indicative pricing
Single CRM integration $8K–$25K. Multi-system integration projects $25K–$60K. Complex CRM-centred platforms with custom logic scale higher.
Real pricing is set after a scoping call. We give honest ranges up front rather than hiding behind "contact us" — the actual quote may land lower or higher depending on what discovery surfaces.
FAQs
The questions we usually get.
Why not just use Zapier or Make.com?
Fine for prototypes. Not fine for the integrations your business runs on. They break silently, don't handle failure gracefully, and bill on per-task pricing that gets expensive fast. Custom integration costs more upfront and dramatically less over the lifetime of the operation.
How do you handle two-way sync without race conditions?
Idempotent updates, last-write-wins or last-write-deferred depending on the workflow, and explicit conflict resolution where it matters. Race conditions are the boring engineering work that separates a hobby integration from production code.
Can you integrate with GoHighLevel?
Yes — GoHighLevel implementation and integration is one of our six core services. We do strategic GHL implementations rather than off-the-shelf snapshot imports.
How long until the integration is live?
Single-system integrations typically ship in 3–6 weeks. Multi-system projects 8–16 weeks depending on the platforms involved and the depth of two-way sync.
What if a platform doesn't have a public API?
We work with the constraints. Sometimes that means a partner-tier API, a webhook-only flow, or a more creative approach. We tell you in discovery what's actually possible before quoting.
Written and delivered by
Andrew Roper — Founder & Technical Director
22+ years of practice across SaaS, ecommerce, healthcare information systems, manufacturing platforms, and government-adjacent compliance software. Every engagement is led personally — not handed off.
Let’s build something
The right system,
built once, properly.
If your business is ready to scale beyond what off-the-shelf tools can support — we should talk.