The dominant cost variable across all source platforms at $5M-$50M brand size is the same: agency hours, not tool subscriptions. Tools total under $5K-$15K for typical migrations (more at enterprise scale with iPaaS). Agency engineering, project management, and SEO discipline make up 90%+ of the total cost.
Reading this guide as a benchmark: the ranges represent typical 2025-2026 engagements at the named brand sizes. Brands at the boundaries (sub-$5M, post-$200M) should expect the ranges to compress or expand respectively. The decision structure — which workstreams, which cost drivers, which hidden costs — does not change.
By brand size
Cost ranges by brand size tier
Sub-$5M brands
$15K-$60K
Simpler engagements, often DIY-led with limited agency involvement. Wix, Squarespace, and small WooCommerce migrations dominate. Self-service migration platforms cover most of the data work.
$5M-$50M DTC brands
$50K-$220K
The cohort this site is written for. Full-service agency engagement, automated migration platform plus Matrixify, possible iPaaS for dual-write. Magento, WooCommerce, and BigCommerce migrations land here.
$50M-$200M brands
$220K-$700K
Enterprise complexity: multi-region, deep B2B, ERP/OMS integration, dual-write with enterprise iPaaS (Boomi or MuleSoft). Adobe Commerce and complex Magento migrations dominate. Engagement runs 6-12 months elapsed.
$200M+ enterprise brands
$700K-$5M+
Salesforce Commerce Cloud migrations, custom-cartridge re-implementation, multi-platform integration across the broader business stack. Almost always agency-led custom builds rather than wizard-based migrations. Timelines 12-24 months.
By workstream
Cost breakdown by workstream
| Workstream | Range |
|---|---|
Discovery and planning Two to six weeks of agency discovery scaling with brand complexity. Deliverables: redirect map, data dictionary, app plan, runbook. The single highest-leverage workstream for outcomes. | $8K-$50K |
Data migration Catalog, customer, order migration. Automated platform plus Matrixify at mid-market; custom ETL or iPaaS at enterprise. The cost scales with SKU count, custom-field complexity, and order history depth. | $15K-$150K |
Theme rebuild Premium template plus customisation at mid-market; custom build at enterprise; Hydrogen-based headless for some brands. Brand-refresh-coincident migrations consistently spend more on theme. | $15K-$150K |
App re-implementation Source-platform app stack re-built on Shopify equivalents. Cost scales with source-platform app count and the complexity of the dominant apps (subscriptions, loyalty, B2B). | $6K-$60K |
SEO migration Audit, redirect map, eight-week post-launch monitoring. Higher for brands with deep content sites or high domain authority where SEO exposure is greater. | $8K-$60K |
iPaaS (if applicable) Celigo at mid-market; Boomi or MuleSoft at enterprise. Only justified for genuine dual-write cutovers or permanent integration needs. Single-cutover brands skip this line entirely. | $10K-$250K annually |
Project management Agency PM hours across the engagement. Scales with engagement size and agency size. One of the strongest predictors of on-time delivery; under-budgeting it consistently produces slippage. | $6K-$80K |
What drives the variance
Why cost ranges vary so much
Source platform
Magento, WooCommerce, and BigCommerce land in similar ranges. Adobe Commerce skews 20-40% higher due to B2B and enterprise complexity. Salesforce Commerce Cloud is its own category (often $300K+ minimum). Wix and Squarespace are typically smaller engagements at lower revenue tiers.
Brand size
The single largest variable. $5M-$50M cohort tops out around $220K; $50M+ scales into $700K+ as enterprise integration work dominates.
B2B and multi-region
B2B Edition (Magento/Adobe Commerce), multi-region (Shopify Markets configuration), and multi-store add $30K-$100K in coordination and configuration work.
Subscription tenure
Active subscriptions add a workstream that scales with active subscriber count. Typical range $10K-$70K depending on cycle complexity and active subscriber base size.
Custom integration depth
Custom ERP, OMS, or CRM integrations beyond standard ones add $20K-$200K depending on complexity. Enterprise SCC migrations are dominated by this cost line, not by storefront work.
Agency selection
Larger agencies carry higher overhead than boutique agencies. The same nominal scope can vary 30-50% between agency tiers. Pick by brand-size fit rather than pricing alone.
Hidden costs
Cost lines operators forget to budget
Internal team time
Two to four hours per week from multiple internal stakeholders across the full timeline. $15K-$80K at loaded internal rates depending on engagement length and team size.
Stabilisation extension
Most engagements extend four to eight weeks post-launch for monitoring and incident response. Adds $10K-$60K beyond the build engagement and is consistently under-budgeted.
Change orders
Scope surfacing after discovery triggers change orders. Brands with discovery discipline absorb under 10% of the engagement in change orders; brands without often see 30-50% in change-order costs.
Source platform overlap
Source platform hosting and licensing continues through the migration window and any dual-write period. Three to twelve months of overlap costs that are real but often forgotten when scoping the migration.
Post-launch tool subscriptions
Matrixify, Easy Redirects, Rewind, and the chosen subscription/loyalty apps become permanent app stack fixtures. $5K-$30K annually depending on app count and tier.