Funding
Funding not disclosed
Founders
Product
Problem
Grid operators rely on proprietary day‑ahead load forecasts that often have limited accuracy and lack transparent benchmarking, leading to higher operating costs and reduced reliability for electricity markets.
Solution
Gramm provides an API delivering benchmark‑verified day‑ahead electricity demand forecasts for seven major U.S. power grids. The forecasts achieve 1.74–3.30% MAPE, outperforming each ISO’s published baseline by up to 59%. Data are served via an OASIS‑compatible, bearer‑token authenticated endpoint that returns JSON responses in under 50 ms, with optional prediction intervals on paid plans. The service is hosted in U.S. data centers and is SOC 2 attested, ensuring data residency and security. A free tier offers 1,000 daily requests without a credit card, enabling developers to integrate high‑accuracy load forecasts into trading, scheduling, or grid‑management applications immediately.
Target Audience
Primary customers are energy traders, grid operators, and software developers building forecasting, scheduling, or risk‑management tools for U.S. electricity markets.
Features
- OASIS‑compatible API delivering day‑ahead to 15‑day demand forecasts for seven U.S. grids
- Forecast accuracy of 1.74–3.30% MAPE, reducing ISO baseline errors by up to 59%
- Rapid JSON responses (e.g., ERCOT day‑ahead in 47 ms) with bearer‑token authentication
- Optional prediction intervals for risk‑aware applications on developer and higher plans
- Weekly model retraining and held‑out validation (Aug 2025
- Apr 2026) for continuous performance
- U.S. data residency and SOC 2 attestation for compliance and security
- Free tier with 1,000 requests per day and no credit‑card requirement