EA Repository vs EA SaaS Platform
Independent Larkinized analysis: Architectural decision guide for platform strategy. Practical guidance for CIOs and enterprise architects evaluating platforms.
Overview
The architectural decision between traditional EA repositories (Sparx with Pro Cloud, Bizzdesign, HOPEX, ABACUS) and EA SaaS platforms (LeanIX, Ardoq) shapes operating model, staffing, and time-to-value for a decade. Larkinized frames this as a strategy choice—not a procurement preference—based on primary consumers, regulatory context, and data ownership.
Repositories optimize for modeled truth and baselines; SaaS optimizes for portfolio facts and executive speed. Many enterprises need elements of both; the decision is which is system of record for which questions.
Key Capabilities
Repositories deliver meta-model control, ArchiMate rigor, baseline comparison, and audit trails for design authority. SaaS delivers discovery integration, owner surveys, cloud analytics, and low-friction executive views. Hybrid integrates via APIs—LeanIX facts feeding Sparx design models or vice versa with clear ownership.
Evaluation criteria should include examination scenarios, ARB deliverables, cloud transformation metrics, and business architecture publication needs—weighted by executive priorities.
Strengths and Limitations
Repository strengths: depth, governance, on-prem options. Limitations: cost, time, change management. SaaS strengths: speed, discovery, UX. Limitations: modeling depth, residency, subscription dependence. Failure mode: buying both without integration—duplicate catalogs and warring truths.
Larkinized mediates federation patterns to prevent tool turf wars between EA and PMO.
Ideal Use Cases
Repository-first: regulated design authority, engineering-heavy firms, DoDAF programs. SaaS-first: CIO portfolio mandates, cloud COE, mid-market lean EA. Hybrid: global banks, insurers, and manufacturers with portfolio SaaS and divisional Sparx.
Startups should not buy repositories; tier-one banks should not rely on SaaS alone for examination evidence.
Pricing and TCO
Repositories: higher services and admin FTE; SaaS: higher recurring subscription with lower initial services. Three-year hybrid TCO often exceeds single-platform TCO—justify with risk reduction and audience coverage.
Larkinized TCO includes decommissioning legacy spreadsheets and Visio—savings offset platform spend when rationalization executes.
Larkinized Recommendation
Document decision principles: which objects live where, sync frequency, conflict resolution. Choose system of record per object type—applications in SaaS, designs in repository, for example. Revisit annually as maturity evolves.
Engage Larkinized for repository versus SaaS strategy workshops and federation blueprints.
- Repositories: modeling depth and baselines
- SaaS: portfolio speed and discovery
- Hybrid requires explicit data ownership rules
Repository vs SaaS System-of-Record Split
Matrix assigning application facts, design models, and roadmaps to SaaS, repository, or shared integration layer.
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