VOL. XCIV, NO. 247

★ FINANCIAL TOOLS & SERVICES DIRECTORY ★

PRICE: 5 CENTS

Sunday, October 5, 2025

View ECB Data PortalView SimilarwebBack to Home

Head-to-head

ECB Data Portal vs Similarweb comparison

Compare pricing, supported platforms, categories, and standout capabilities to decide which tool fits your workflow.

Quick takeaways

ECB Data Portal adds Central Bank Watcher, Inflation Rates, Interest Rates, GDP, Unemployment Rates, Yield Curves, and Real Yields coverage that Similarweb skips.

Similarweb includes App & Website Traffic, and Sheets / Excel Add-ins categories that ECB Data Portal omits.

ECB Data Portal highlights: Open SDMX 2.1 REST API with discovery & retrieval modes; single entry point at data-api.ecb.europa.eu/service/ and rich query parameters (e.g., startPeriod/endPeriod, updatedAfter, includeHistory, detail, firstNObservations/lastNObservations)., Format flexibility via content negotiation and the `format` query param: SDMX‑JSON, CSV, and SDMX‑ML (structure‑specific and generic)., and Interactive portal with export of data (CSV, XLS long/wide, SDMX) and export of visuals (PNG, PDF, PowerPoint)..

Similarweb is known for: Website traffic and engagement analytics, including keyword research, referral sources, and a free traffic checker tool., APIs available in REST and Batch modes: REST delivers JSON responses, while Batch handles large CSV reports., and Webhook support for subscribing to daily or monthly data releases, with options to manage subscriptions directly..

ECB Data Portal logo

ECB Data Portal

data.ecb.europa.eu

Official ECB gateway for euro‑area statistics with an open SDMX 2.1 REST API. The new endpoint is https://data-api.ecb.europa.eu/service/ (replacing the legacy SDW path). Content negotiation supports SDMX‑JSON, CSV, and SDMX‑ML. Charts and tables can be downloaded as CSV/XLS (long & wide), and charts as PNG/PDF/PPT. Typical update cadence is daily to monthly (e.g., reference FX rates around 16:00 CET on working days). ECB advises migrating from the old SDW URL as automatic redirects are planned to end on 1 Oct 2025.

Platforms

Web
API

Pricing

Free

Quick highlights

  • Open SDMX 2.1 REST API with discovery & retrieval modes; single entry point at data-api.ecb.europa.eu/service/ and rich query parameters (e.g., startPeriod/endPeriod, updatedAfter, includeHistory, detail, firstNObservations/lastNObservations).
  • Format flexibility via content negotiation and the `format` query param: SDMX‑JSON, CSV, and SDMX‑ML (structure‑specific and generic).
  • Interactive portal with export of data (CSV, XLS long/wide, SDMX) and export of visuals (PNG, PDF, PowerPoint).
  • Comprehensive euro‑area macro & markets coverage: HICP inflation, key & market interest rates, exchange rates (reference rates), GDP and labor indicators, plus euro‑area yield curves (spot/forward/par).
  • Revisions/deltas supported (`updatedAfter`) and conditional GET via `If‑Modified‑Since` for efficient sync.

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Similarweb logo

Similarweb

similarweb.com

Digital intelligence platform providing website and app traffic data, engagement benchmarks, and competitive insights. API access is sold separately or bundled with Enterprise plans, and is required for most native integrations (Excel, Sheets, Tableau, Power BI, Salesforce, HubSpot, Snowflake, Databricks). Webhooks support daily and monthly data release notifications. A free DigitalRank API offers basic website ranking data.

Platforms

Web
API

Pricing

Free
Subscription

Quick highlights

  • Website traffic and engagement analytics, including keyword research, referral sources, and a free traffic checker tool.
  • APIs available in REST and Batch modes: REST delivers JSON responses, while Batch handles large CSV reports.
  • Webhook support for subscribing to daily or monthly data releases, with options to manage subscriptions directly.
  • Data Exporter for no-code bulk exports, including scheduled email delivery and CSV downloads.
  • Bulk input support for uploading CSV lists (up to ~1M entries per report) to create large exports.

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Overlap

Shared focus areas

3 overlaps

Mutual strengths include Data APIs, APIs & SDKs, and Data Visualizations.

Where they differ

ECB Data Portal

Distinct strengths include:

Central Bank Watcher
Inflation Rates
Interest Rates
GDP
Unemployment Rates
Yield Curves
Real Yields
  • Open SDMX 2.1 REST API with discovery & retrieval modes; single entry point at data-api.ecb.europa.eu/service/ and rich query parameters (e.g., startPeriod/endPeriod, updatedAfter, includeHistory, detail, firstNObservations/lastNObservations).
  • Format flexibility via content negotiation and the `format` query param: SDMX‑JSON, CSV, and SDMX‑ML (structure‑specific and generic).
  • Interactive portal with export of data (CSV, XLS long/wide, SDMX) and export of visuals (PNG, PDF, PowerPoint).
  • Comprehensive euro‑area macro & markets coverage: HICP inflation, key & market interest rates, exchange rates (reference rates), GDP and labor indicators, plus euro‑area yield curves (spot/forward/par).

Similarweb

Distinct strengths include:

App & Website Traffic
Sheets / Excel Add-ins
  • Website traffic and engagement analytics, including keyword research, referral sources, and a free traffic checker tool.
  • APIs available in REST and Batch modes: REST delivers JSON responses, while Batch handles large CSV reports.
  • Webhook support for subscribing to daily or monthly data releases, with options to manage subscriptions directly.
  • Data Exporter for no-code bulk exports, including scheduled email delivery and CSV downloads.

Feature-by-feature breakdown

AttributeECB Data PortalSimilarweb
Categories

Which research workflows each platform targets

Shared: Data APIs, APIs & SDKs, Data Visualizations

Unique: Central Bank Watcher, Inflation Rates, Interest Rates, GDP, Unemployment Rates, Yield Curves, Real Yields

Shared: Data APIs, APIs & SDKs, Data Visualizations

Unique: App & Website Traffic, Sheets / Excel Add-ins

Asset types

Supported asset classes and universes

Bonds, Currencies, Other

Other

Experience levels

Who each product is built for

Beginner, Intermediate, Advanced

Beginner, Intermediate, Advanced

Platforms

Where you can access the product

Web, API

Web, API

Pricing

High-level pricing models

Free

Free, Subscription

Key features

Core capabilities called out by each vendor

Unique

  • Open SDMX 2.1 REST API with discovery & retrieval modes; single entry point at data-api.ecb.europa.eu/service/ and rich query parameters (e.g., startPeriod/endPeriod, updatedAfter, includeHistory, detail, firstNObservations/lastNObservations).
  • Format flexibility via content negotiation and the `format` query param: SDMX‑JSON, CSV, and SDMX‑ML (structure‑specific and generic).
  • Interactive portal with export of data (CSV, XLS long/wide, SDMX) and export of visuals (PNG, PDF, PowerPoint).
  • Comprehensive euro‑area macro & markets coverage: HICP inflation, key & market interest rates, exchange rates (reference rates), GDP and labor indicators, plus euro‑area yield curves (spot/forward/par).
  • Revisions/deltas supported (`updatedAfter`) and conditional GET via `If‑Modified‑Since` for efficient sync.
  • Yield curve datasets include AAA euro‑area government curves with daily business‑week frequency; additional capital‑market series include real benchmark bond yields.

Unique

  • Website traffic and engagement analytics, including keyword research, referral sources, and a free traffic checker tool.
  • APIs available in REST and Batch modes: REST delivers JSON responses, while Batch handles large CSV reports.
  • Webhook support for subscribing to daily or monthly data releases, with options to manage subscriptions directly.
  • Data Exporter for no-code bulk exports, including scheduled email delivery and CSV downloads.
  • Bulk input support for uploading CSV lists (up to ~1M entries per report) to create large exports.
  • Dashboard and table exports in Excel, PDF, PPT, and PNG formats.
Tested

Verified by hands-on testing inside Find My Moat

Not yet

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Editor pick

Featured inside curated shortlists

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Frequently Asked Questions

Which workflows do ECB Data Portal and Similarweb both support?

Both platforms cover Data APIs, APIs & SDKs, and Data Visualizations workflows, so you can research those use cases in either tool before digging into the feature differences below.

Do ECB Data Portal and Similarweb require subscriptions?

Both ECB Data Portal and Similarweb keep freemium access with optional paid upgrades, so you can trial each platform before committing.

How can you access ECB Data Portal and Similarweb?

Both ECB Data Portal and Similarweb prioritize web or desktop access. Investors wanting a mobile-first workflow may need to rely on responsive web views.

What unique strengths set the two platforms apart?

ECB Data Portal differentiates itself with Open SDMX 2.1 REST API with discovery & retrieval modes; single entry point at data-api.ecb.europa.eu/service/ and rich query parameters (e.g., startPeriod/endPeriod, updatedAfter, includeHistory, detail, firstNObservations/lastNObservations)., Format flexibility via content negotiation and the `format` query param: SDMX‑JSON, CSV, and SDMX‑ML (structure‑specific and generic)., and Interactive portal with export of data (CSV, XLS long/wide, SDMX) and export of visuals (PNG, PDF, PowerPoint)., whereas Similarweb stands out for Website traffic and engagement analytics, including keyword research, referral sources, and a free traffic checker tool., APIs available in REST and Batch modes: REST delivers JSON responses, while Batch handles large CSV reports., and Webhook support for subscribing to daily or monthly data releases, with options to manage subscriptions directly..

Keep exploring

Stay on top of related tools

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Curation & Accuracy

This directory blends AI‑assisted discovery with human curation. Entries are reviewed, edited, and organized with the goal of expanding coverage and sharpening quality over time. Your feedback helps steer improvements (because no single human can capture everything all at once).

Details change. Pricing, features, and availability may be incomplete or out of date. Treat listings as a starting point and verify on the provider’s site before making decisions. If you spot an error or a gap, send a quick note and I’ll adjust.