Sankung Fatty
Email

Founder & CEO, RassketSan Francisco, California

I build forecasting infrastructure for utilities and data centers.

Rassket lets a utility or a data center forecast peak demand and act on it the same day, without hiring a data science team. I wrote the production stack myself. It is live, and it produces a live autonomous forecast for a Tennessee utility today.

Sankung Fatty smiling, in a navy blazer and open-collared white shirt.
01 / 04
Role
Founder & CEO, Rassket
Discipline
Machine learning engineer, economist
Base
San Francisco, California
Origin
The Gambia

Rassket

Utilities forecast the electricity your home, your office and your city will need weeks ahead. Data centers have to forecast their own load the same way. When the forecast is wrong it costs money, and it is wrong often. The tools most operators have for this are spreadsheets, hand-tuned models and a data science hire they cannot make.

Rassket is the fix I wanted to exist. It connects to an operator's own data, builds a model tuned to that utility or data center, forecasts peak demand, and turns the forecast into something an operator can act on the same day. It explains its reasoning in plain language. The final call stays with the operator.

Rassket went through Founders Inc in San Francisco in the fall of 2025 and CO.LAB's Energy Innovation Accelerator in Chattanooga in 2026, and joined the NVIDIA Inception program in September 2026.

I built the entire production stack:

  • 01

    AutoML pipeline

    Selects, trains and validates forecasting models on an operator's own data, with no data scientist in the loop.

  • 02

    Energy feature library

    The domain-specific features that turn raw utility and data center data into signals a model can forecast from.

  • 03

    Live utility data connectors

    Pull live operational data into the models as it arrives.

  • 04

    Agentic operator layer

    Turns a forecast into a same-day decision, in the language an operator already uses.

Programs, partners and sponsors along the way

Sankung Fatty presenting at a Stanford lectern to a full room. The screen beside him shows a Rassket slide reading ‘Every gigawatt starts as a guess.’
Sankung Fatty presenting with a microphone at a Stanford Business lectern, a laptop open in front of him, the audience in soft focus in the foreground.
Nine people standing in a row in front of a screen with the CO.LAB logo. Sankung Fatty is sixth from the left, in a white shirt and red tie.

Background

I am a machine learning engineer and an economist. Both halves matter. Forecasting a grid is a statistics problem. Deciding what to do with the forecast, and what a wrong one costs, is an economics problem. With Rashmi Nagpal and David Guy Brizan I co-authored A Survey of Conversational Styles and Systems, published by IEEE at the 16th International Conference on Human System Interaction in 2024. Rassket is the second company I have founded.

I hold a double-major BSc in Mathematics and Economics and an MSc in Applied Economics with a focus in Data Science from the University of San Francisco. Since January 2024 I have also been a research assistant in the university's Computer Science Department, working on conversational style and on improving speech recognition systems with natural language processing and machine learning. In that work I kept running the same loop: clean the data, preprocess it, train a model, start over. The platforms that claimed to fix that were either black boxes or too shallow to trust. Rassket started as the tool I wanted for that loop, built for the one domain where I thought the error mattered most.

I am also Deputy Director of the West Africa Centre for Social and Economic Research, an independent non-profit research and policy institution based in The Gambia and the UK. My research there has focused on rural communities, disadvantaged communities and women farmers.

I am from The Gambia. I am the first college graduate in my family. Some villages there still have no power at all, and the grid that does exist is not something anyone takes for granted. I now build forecasting infrastructure for the American grid. I do not treat that as a story. I treat it as the reason the work has to be right.

The name is deliberate. Ras for Ras Tafari, Haile Selassie of Ethiopia, the one African country never colonised. Ket from rocket, because the whole point is speed.

Other things I have built

Along the way

  • Sankung Fatty with a backpack and a red jacket over his arm, in front of a wall of blue, red and yellow glass tiles at the Stanford Ecopreneurship demo day.
  • Sankung Fatty, arms crossed, in a pale blue shirt and TechCrunch lanyard in front of a TechCrunch Disrupt backdrop.
  • Head-and-shoulders photograph of Sankung Fatty smiling, in a navy blazer and open-collared white shirt, against a pale background with green, purple and yellow geometric shapes.
  • Sankung Fatty at a wooden NABE lectern in front of a blue National Association for Business Economics backdrop.
  • Studio portrait of Sankung Fatty in a white corduroy shirt against a plain grey wall.
  • Sankung Fatty crouching to fist-bump a camouflage-painted humanoid robot in a whitewashed workshop.
  • Sankung Fatty in a blue and white All Stars varsity jacket in front of a mountain waterfall.
  • Selfie of Sankung Fatty smiling in a white shirt with a WeAreDevelopers and AWS lanyard under a slatted ceiling.
  • Sankung Fatty standing at a laptop across a desk from a colleague who is typing, a bicycle helmet on the table.
  • Sankung Fatty in a white shirt and maroon tie wearing green and gold University of San Francisco graduation beads.
  • Selfie of Sankung Fatty in a blue checked sweater with a friend, tall downtown buildings behind them.
  • Sankung Fatty in a white shirt and burgundy tie on a sunny San Francisco street lined with palm trees and towers.
  • Selfie of Sankung Fatty laughing beside a friend wearing a purple conference lanyard in a hotel corridor.
  • Sankung Fatty in aviator glasses, a grey wool overshirt and a patterned maroon tie, looking into the camera.

Press

  1. Teknovation

    CO.LAB wraps Energy Innovation Accelerator with intimate “Night with the Founders” reception in Chattanooga

    “Sankung Fatty built Rassket, which he describes as the end of manual energy forecasting, out of San Francisco. A proud Gambian, Fatty has spent his career focused on expanding access to reliable energy.”

    Reported that week: 42 active users, a strong month of signed revenue, and conversations opened with Silicon Ranch.

  2. Teknovation

    Rassket wants to slash forecasting errors, fix the grid and give back

    “What sets Rassket apart from other AutoML tools, Fatty said, is that it isn’t generic. The platform builds models tuned to a specific company’s data and operations, and critically, it can explain its reasoning in plain language rather than just outputting a number.”

  3. Teknovation

    Four founders, six weeks: CO.LAB has big plans to help its energy accelerator companies partner with industry

    “At Rassket, we provide an easy software solution that helps energy operators be able to make accurate predictions in minutes instead of months or weeks.”

  4. Chattanooga Times Free Press

    Meet start-up founders coming to Chattanooga to grow their energy solutions

    On the four founders in CO.LAB's first utility-sector cohort. Subscriber-only.

Contact

If you are doing diligence, evaluating Rassket for your utility or data center, or writing about the grid, email me. I read and answer it myself.