Data & BI Architect
1Power BI tabular modeling (VertiPaq, DAX) AND SQL/dbt modeling on Superset side, target analytical stack design
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Comparative audit Power BI vs Apache Superset on three structural criteria: technology sovereignty, Premium license cost, on-premise deployment constraints. Documented Go/No-Go decision, and if migration: semantic model rebuild, equivalent Superset dashboards, SQL-based access governance.
Each phase aggregates one or more of the ten ATLAS steps. No phase starts until the previous one has delivered its validated artefact. The ATLAS methodology makes AS/400 migration predictable and auditable.
Priority phase before any migration commitment. Analysis of existing Power BI estate (dashboard count, models, DAX measures, RLS, Premium capacities). Real usage measurement (Power BI Activity Logs). Evaluation of 3 structural conditions: sovereignty, Premium license cost, strict on-premise. Power BI Premium vs Superset self-hosted vs Preset Cloud 3-year TCO comparison. Signed Go/No-Go decision deliverable.
If Go: target selection (Superset self-hosted, Preset Cloud, or Metabase). Analytical database choice per volume (PostgreSQL < 10M rows, ClickHouse > 100M, Trino for multi-sources, DuckDB for ad hoc). RLS strategy (SQL views or Superset RLS). Model layer design (dbt recommended for governance as code).
Model rebuild on database side: centralized SQL views, materialized tables for performance, dbt macros for reusable measures (DAX equivalent). 30 min per critical dashboard business workshops to redefine real need — no pixel-perfect attempt. Parity test suite preparation.
Per-dashboard reconstruction in Superset with equivalent widgets (charts, filters, cross-filters drill-down). RLS configuration: filters in SQL views by user authenticated via Superset RBAC, or Superset RLS configured per dataset. Visual parity and security per user role tests. Performance tests.
Progressive cutover user by user or department by department. Power BI ↔ Superset coexistence for 2-3 months (depending on criticality). Dated Power BI Premium decommissioning with savings measurement. End user and editor training. Ops handover to client team with documentation.
Three signals push to migrate Power BI to Superset. Technological sovereignty: European public bodies, defense sector, healthcare sector wanting to avoid Microsoft dependency (US cloud, telemetry, restrictive audits). Premium license cost: for organizations with 10,000+ users, Power BI Premium becomes expensive (capacities, per-user). Strict on-premise deployment: some organizations cannot use public cloud (regulated zones, ultra-sensitive data). Outside these three cases, Power BI typically remains more performant and better tooled than Superset for most organizations.
Apache Superset (Apache Software Foundation incubated, ex-Airbnb) is the main open source alternative to Power BI / Tableau. Strengths: 100% open source (Apache 2.0), deployable on-premise or cloud, native SQL connectors (PostgreSQL, MySQL, ClickHouse, Trino, Druid, BigQuery, Snowflake), modern interface, granular RBAC, Preset certified (managed Superset). Limits: no central semantic model (each dashboard has its SQL), no DAX equivalent (no cross-functional reusable measures), admin interface less polished than Power BI, editor learning curve. Suited to data-driven organizations with SQL teams.
Power BI → Superset migration is not a direct translation. Power BI uses a VertiPaq tabular model + DAX, Superset uses direct SQL on databases. Migration requires: data model reconstruction on database side (SQL views, materialized tables, ClickHouse for performance), dashboard rewriting (Power BI visuals don't transpose, but uses are reproducible), security adaptation (Power BI RLS → row-level security via SQL or Superset RLS). See also the Power BI migration path for inverse patterns.
Apache Superset + PostgreSQL / ClickHouse / Trino, deployable on-premise
Maximum sovereignty, on-premise, tech-savvy data team. Mastered 100% open source stack.
EU / Canada sovereignty acceptable, team without Superset infra expertise, need for pro support. Preset hosted in the chosen region.
Simpler alternative to Superset for less technical teams. Less powerful on advanced SQL but smoother learning curve.
If motivation is only cost, optimizing Power BI capacities (embedded vs Premium, P-SKU vs A-SKU, inactive Pro license audit) costs less than a complete migration.
A Power BI → Superset migration is typically structured over 6 to 12 months depending on volume. For an estate of 50-150 dashboards with centralized database, plan 6 to 9 months with a 4-5 person cell: data architect, Superset/Python developer, two SQL/data engineering developers, business referent. For larger programs (500+ dashboards, multi-domain), plan 9 to 12 months and 6-8 people. Migration is more expensive than incoming Power BI migration because Superset demands more SQL on database side.
Underestimating the loss of semantic model. Power BI has a centralized tabular model with reusable DAX measures. Superset has no equivalent — each dashboard does its SQL. Naive migration duplicates business logic.
Model reconstruction on database side: centralized SQL views (PostgreSQL, ClickHouse), materialized tables for performance, or use of dbt to govern the data model as code. Reusable DAX measures become named SQL views or dbt macros. Greater initial effort but maintainable over time.
Migrating dashboards identically. Power BI visuals have their specifics (slicers, drill-through, native interactivity). Reproducing pixel-perfect in Superset frustrates users.
Targeted redesign per dashboard: for each critical dashboard, 30 min workshop with business to redefine real need, then reconstruction in Superset with equivalent widgets (charts, filters, drill-down dashboards via cross-filters). No pixel-perfect attempt.
Underestimating performance on large volumes. Power BI VertiPaq compresses in memory and is ultra-fast even on 100M+ rows. Superset queries the database directly — on standard PostgreSQL, can be slow.
Adapted analytical database choice: ClickHouse for massive volumes (100M-10G rows), Trino/Presto for complex multi-source joins, DuckDB for ad hoc analyses. Standard PostgreSQL suffices up to a few million rows. Performance tests from POC phase.
Neglecting row-level security (RLS). Power BI has well-integrated native RLS. Superset offers mechanisms but requires more manual configuration.
RLS via SQL: filters in views (by authenticated user via Superset RBAC), or Superset RLS configured per dataset. For complex cases (multi-level dynamic RLS), may require custom development. Security parity tests vs Power BI on all user roles.
Several distinct profiles, mobilized over the full program duration. Reproducing this cell internally is rarely realistic — the legacy skills shortage and ATLAS expertise depth make outsourcing structurally faster and less risky.
Power BI tabular modeling (VertiPaq, DAX) AND SQL/dbt modeling on Superset side, target analytical stack design
Superset configuration, dashboards, RBAC, RLS, Python customs if needed, self-hosted or Preset deployment
Model reconstruction via SQL views or dbt, analytical database choice (PostgreSQL, ClickHouse, Trino, DuckDB), materialized tables
Per critical dashboard need-redefinition workshops, reconstructed dashboard validation, editor change management
Power BI RLS → SQL RLS + Superset RBAC mapping, per-user-role security parity tests
ClickHouse / Trino / PostgreSQL tuning, ingestion, indexing, dashboard performance monitoring
Proven capability on multi-BI: Power BI (Pentaho → Power BI public sector NA, France telecom Local CDR, multi-country Dynamics retail), Databricks data engineering. Apache Superset / open source capability applicable to organizations seeking a sovereign alternative to Power BI.
Three legitimate reasons. Technological sovereignty (European public bodies, defense, healthcare). Premium license cost on large estates (10,000+ users). Strict on-premise deployment (regulated zones, ultra-sensitive data). Outside these cases, Power BI typically remains the right choice.
On visualization features, Superset is at the level (charts, dashboards, filters, drill-down). On semantic model, Power BI has the advantage (DAX, reusable measures) — Superset compensates via dbt and SQL. On usage simplicity, Power BI remains more polished. On massive performance (100M+ rows), Superset + ClickHouse can surpass Power BI.
For 50-150 dashboards with centralized database, plan 300 to 600 k€ in nearshore co-delivery over 6-9 months. For 500+ multi-domain dashboards, 600 k€ to 1.2 M€ over 9-12 months. To compare with expected Power BI Premium license savings: typical ROI 2-3 years depending on volume.
Yes, this is even a common strategy. Power BI for standard business uses (Microsoft 365, Excel, Teams integration). Superset for sovereign, on-premise dashboards, or massive analyses on ClickHouse. The data model can be common (shared lakehouse).
Three concrete ways to start — from a 3-week comparative audit to a full migration program. Our approach systematically begins with a documented Go/No-Go audit before any migration commitment, because outside the sovereignty/cost/on-premise cases, Power BI remains the right choice in most situations.