GrünstromIndex Pricing: Plans, Tiers, and Cost Examples (2026)

Pricing overview

GrünstromIndex provides access to real-time and forecast data on green energy availability, offering a tiered pricing structure that includes a free developer plan and several paid subscription options. The primary factors influencing cost are the volume of API requests per month, the forecast horizon (how many days into the future data is available), and access to historical data. Pricing is denominated in Euros.

The service aims to support various use cases, from individual developers experimenting with smart home automation to enterprises optimizing large-scale energy consumption based on renewable energy availability. All plans include access to the GrünstromIndex Live API, Forecast API, and Historical Data, with feature limitations scaling with the chosen tier. Detailed pricing information is available on the official GrünstromIndex pricing page.

While specific pricing details for custom enterprise solutions are not publicly listed, the tiered structure provides a clear progression for most standard use cases. Users should review the specific terms and conditions for each plan, particularly regarding data retention for historical data access and rate limits beyond the primary request count.

Plans and tiers

GrünstromIndex offers multiple plans designed to accommodate differing usage patterns and requirements. These plans vary primarily in the number of API requests included, the maximum forecast horizon, and the extent of historical data access. The following table provides a summary of the key plans and their features, based on information from the GrünstromIndex official site:

Beyond the listed request limits, additional requests may incur an overage charge, which is typically a per-request fee that varies by plan. Users should consult the GrünstromIndex pricing details for specific overage rates. The Enterprise Plan is designed for organizations with unique scaling or integration needs, often involving custom data feeds or higher service level agreements (SLAs).

Free tier and limits

GrünstromIndex offers a Developer Plan as its free tier, designed to enable users to explore the API's capabilities without an initial financial commitment. This plan provides a foundational set of features suitable for testing and developing initial integrations.

Key limits of the Developer Plan include:

• API Requests: 5,000 requests per month. This limit resets monthly.
• Forecast Horizon: Data is available for a 1-day forecast. This means users can query for green energy availability for the current day and the immediate next day.
• Historical Data: Access to a limited scope of historical data, typically covering recent periods.
• Support: Community support, without dedicated technical assistance.

The free tier allows developers to become familiar with the API's structure, data formats (JSON), and authentication methods (API keys), as detailed in the GrünstromIndex documentation. It's suitable for small personal projects, educational purposes, or initial proof-of-concept development before scaling to a paid plan. Exceeding the 5,000 request limit on the Developer Plan typically requires an upgrade to a paid subscription.

Real-world cost examples

To illustrate the potential costs associated with using GrünstromIndex, consider the following real-world scenarios:

1. Smart Home Energy Optimization (Basic Plan):
   A user wants to optimize their smart home devices (e.g., EV charging, washing machine) to run when green energy availability is high. They query the API every hour for the next 3-day forecast. This translates to 24 queries/day * 30 days/month = 720 requests/month. Additionally, they might query the live index 10 times a day to confirm real-time conditions (300 requests/month). Total requests: 1,020 requests/month.

   • Cost: The Basic Plan at 25€/month provides 100,000 requests, making this usage well within the limit.
   • Features: Access to a 3-day forecast is sufficient for scheduling most home appliances.

2. Small Business Energy Dashboard (Standard Plan):
   A small business operates a dashboard displaying real-time green energy availability for its location and a 7-day forecast. The dashboard refreshes live data every 15 minutes (4 queries/hour * 24 hours/day * 30 days/month = 2,880 requests/month). It also fetches the 7-day forecast once per hour (24 queries/day * 30 days/month = 720 requests/month). Additionally, an internal process queries historical data for monthly reports (e.g., 500 requests/month).

   • Total Requests: 2,880 + 720 + 500 = 4,100 requests/month.
   • Cost: The Standard Plan at 99€/month offers 500,000 requests and a 7-day forecast, easily accommodating this usage.
   • Features: The 7-day forecast and historical data access support comprehensive reporting and planning.

3. Large-Scale Industrial Energy Management (Professional Plan):
   An industrial facility uses GrünstromIndex data to dynamically adjust its energy-intensive processes. They query the live index every minute (60 queries/hour * 24 hours/day * 30 days/month = 43,200 requests/month) and fetch the 7-day forecast every 30 minutes (2 queries/hour * 24 hours/day * 30 days/month = 1,440 requests/month). Automated systems also pull historical data for predictive modeling, resulting in approximately 10,000 requests/month.

   • Total Requests: 43,200 + 1,440 + 10,000 = 54,640 requests/month.
   • Cost: The Professional Plan at 249€/month provides 2,000,000 requests, which is significantly more than this usage, offering ample headroom for growth.
   • Features: Full historical data access and a 7-day forecast enable sophisticated operational adjustments.

4. Startup with Rapid Growth (Monitoring Overage):
   A startup launches a new application that quickly gains traction, initially on the Basic Plan (100,000 requests/month). In a surge of popularity, their usage jumps to 150,000 requests in a month.

   • Base Cost: 25€ (for Basic Plan).
   • Overage: 50,000 requests beyond the plan limit. If the overage rate for the Basic Plan is, for example, 0.25€ per 1,000 requests (0.00025€ per request), the additional cost would be 50,000 * 0.00025€ = 12.50€.
   • Total Cost: 25€ + 12.50€ = 37.50€. At this point, the startup might consider upgrading to the Standard Plan to avoid consistent overage charges and gain more features.

How the pricing compares

When evaluating GrünstromIndex's pricing, it is useful to compare it against alternative data providers in the broader energy and environmental data space. While direct feature-for-feature comparisons can be complex due to varying data granularity, geographical coverage, and specific metrics offered, a general comparison of pricing models and entry points can be made.

OpenWeatherMap:

• Primarily focuses on weather data, including current weather, forecasts, and historical data. While it can provide some environmental data like air pollution, its core offering is not specific to green energy availability.
• Offers a free plan for 1,000,000 calls/month for basic weather data, with paid plans starting at 40 USD/month for 2,000,000 calls and more advanced features like 16-day forecasts and historical data access.
• Comparison: OpenWeatherMap's free tier offers a significantly higher request volume but for general weather data, not specific green energy index. For green energy insights, GrünstromIndex is more specialized.

Tomorrow.io:

• Provides a comprehensive weather and environmental intelligence platform, offering highly granular forecasts and historical data across various parameters, including air quality and some energy-relevant metrics.
• Their pricing model is typically enterprise-focused with custom quotes, though they may have specific developer tiers or project-based pricing. Publicly available pricing for specific API tiers is less common, as noted on their API product page.
• Comparison: Tomorrow.io is a broader environmental intelligence platform. GrünstromIndex is more narrowly focused on green energy index data, which might result in a more direct solution for specific green energy optimization needs. Tomorrow.io's advanced features and global coverage often come at a higher price point, potentially making GrünstromIndex a more cost-effective option for dedicated green energy data.

electricityMap:

• Focuses on real-time electricity consumption and production data, with a strong emphasis on carbon intensity. It provides data on the carbon footprint of electricity in various regions.
• Offers a free API for non-commercial use with rate limits, and paid commercial plans that scale with usage and features. Specific pricing details for commercial tiers are typically provided upon request.
• Comparison: electricityMap is a closer alternative in terms of carbon intensity data. GrünstromIndex focuses specifically on the availability of green electricity, which can be a distinct metric from overall carbon intensity (though related). electricityMap's free tier is generous for non-commercial use, similar to GrünstromIndex's developer plan for specific green energy data.

Generally, GrünstromIndex's pricing structure is competitive for its specialized data set, offering a clear progression from a free entry point to scalable paid plans. Its focus on green energy availability provides a distinct value proposition compared to broader weather or general energy data providers. Organizations prioritizing specific green energy metrics for their applications may find GrünstromIndex's tiered pricing model to be a cost-effective solution for their needs.