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FelixFusion
Techstars '25Roseville, US · 1 known investors
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Felix provides data and analysis tools for transmission and interconnection planning in the electricity grid, serving developers, utilities, ISOs, and large energy users to accelerate project deployment while maintaining reliability.
Also known as Felix · FelixFusion Corporation
Founders & leadership
Investors · 1
How we know: the Techstars portfolio · open dataset · Top 3000 Accelerator Startups (no YC) 2026-08 · Not right? Tell us
Company profile
researched Sep 2026FelixFusion (branded "Felix") develops grid interconnection analytics for energy infrastructure and data center projects. The platform models connection points across a network to show available capacity, likely upgrade costs and constraints, with the aim of letting teams identify viable sites and assess interconnection risk before committing capital. The company states its tools produce study-grade results in minutes rather than months, with more than 97% accuracy against official study outcomes, 100% network coverage and over 500 connection points screened.
The product set includes Queue Signal, for siting and queue decisions; GridSim, aimed at letting large loads enter the interconnection queue and at evaluating the impact of competing projects; and GridHorizon, for portfolio-level development and interconnection decisions, including cost and capacity comparison across sites, queue positions and expansion options. Additional modules cover headroom assessment, using real-time substation capacity and upgrade cost data, and a local studies tool that toggles local queue assumptions across custom scenarios and re-runs full ISO study methodology.
FelixFusion also operates a public read API at api.felixfusion.ai, documented at docs.felixfusion.ai, that exposes power-market datasets, pricing locations and report-style outputs. API routes sit under /v1 with key-based authentication, and support dataset catalog and metadata lookup, timeseries queries with filtering, pagination, column selection and resampling, audits and update history, pricing node/hub/zone listings including nearby-location lookup, and public reports such as daily peak-load summaries. Documentation references ERCOT dataset families among supported markets.
Business model
FelixFusion sells software to energy infrastructure teams, with demo-led onboarding on a customer's target network, and additionally exposes its power-market data through a public read API with API-key authentication.
Traction
Company-reported figures include 100% network coverage, more than 500 connection points screened, results in minutes, and over 97% accuracy versus official study outcomes.
▸Full profile — market position, technology, go-to-market, geography
Market position
An early-stage, pre-seed company of roughly 1-10 employees working in energy analytics, interconnection and grid risk software.
The company positions its methodology as aligned with official system operator study practice and reports over 97% accuracy against official study outcomes across modeled connection points, with results returned in minutes and tooling built by engineers who have worked at ISOs, utilities and developers.
Technology
The platform models every connection point on a network using power flow models requested from the relevant ISO or utility, applying ISO- and utility-specific power analysis methodologies on top of those models. It uses the same analysis software as ISOs and utilities, including PowerGEM's TARA and Siemens PTI's PSS/E, and re-runs full ISO study methodology under user-defined queue scenarios. A public HTTP API provides dataset discovery, timeseries queries, pricing-location lookups and report outputs.
Go-to-market
Direct, demo-led sales to energy infrastructure, utility and ISO teams via "Book a Demo" requests, supported by self-serve developer documentation for its public API.
Generation developers, large-load and data center developers, transmission planning engineers, utility teams and ISOs, as well as investors and lenders evaluating power and infrastructure projects.
Geography
Listed locations include Roseville and Stanford, California, United States, and Concord/Vaughan, Ontario, Canada. Market coverage documented for the public API includes ERCOT.
Compiled by commissioned research from 8 cited public sources — announcements, filings, and press listed under research sources below.
Key figures
latest reportedCompany-reported or press-reported figures, each dated to when it was claimed — not independently audited.
Related companies · 1
Companies working in the same space as FelixFusion.
▸Research sources · 8
primary sources listed
- FelixFusionfelixfusion.ai · web
8 public sources were cited for this profile; the first-party ones are listed here.
Frequently asked questions
- What does FelixFusion do?
- FelixFusion builds ISO-aligned modeling tools that show developers and grid operators where projects can interconnect fastest.
- Who founded FelixFusion?
- FelixFusion was founded by Ash Yousefi, PhD, MBA.
- Who are FelixFusion's investors?
- FelixFusion's investors include Techstars.
- Where is FelixFusion headquartered?
- FelixFusion is headquartered in Roseville, US.