Who founded Magnitude?

Magnitude was founded by Tom Greenwald, Anders Lie in 2025.

Who are Magnitude's investors?

Magnitude's investors include Eight Capital, Y Combinator, Blast.Club.

Where is Magnitude headquartered?

Magnitude is headquartered in San Francisco, US.

Magnitude

YC S25

San Francisco, US · Founded 2025 · 2 employees · 3 known investors

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Magnitude is an AI coding agent optimized for open-source language models like GLM, Kimi, and DeepSeek, designed to generate and execute code with improved reliability and efficiency. The platform serves software developers and teams looking to build with open weights models at lower cost than frontier API pricing.

Also known as Magnitude AI Inc. · Magnitude, Sidekick, Sagekit · Sagekit · Sidekick

AI & Machine Learning Developer Tools Enterprise Software Artificial Intelligence Open Source Infrastructure AIUnited States of AmericaAmerica / Canada

Founders & leadership· Y Combinator alumni (S25)

Magnitude was founded in 2025 by Tom Greenwald and Anders Lie.

Tom Greenwald Co-Founder & CEOTom Greenwald studied computer science at Northeastern University and worked as a product manager on special projects at SimpliSafe before becoming CEO of Magnitude.

Anders Lie Co-Founder / CTOAnders Lie is a CTO at Sagekit with a computer science and mathematics degree from Iowa State University. He previously worked as a software engineer at AWS on automation platforms.

Investors · 3

Eight Capitallisted by Eight CapitalNorwalk

How we know: Y Combinator's founder network · eightcapital.com · Not right? Tell us

Y Combinatorlisted by Y CombinatorSan Francisco · $500K

How we know: the Y Combinator directory · open dataset · 5k.vc investor directory · Not right? Tell us

Blast.Clubreported$5.5M

How we know: Y Combinator's founder network · Not right? Tell us

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RiftenRiften provides a routing layer that sits between a company's applications and large language model APIs, directing each request to the least expensive capable model and using self-hosted open-weight models where possible to reduce inference costs. It also uses the resulting task data to train private, company-owned models on recurring work, serving businesses that run AI-powered applications.

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Companies working in the same space as Magnitude.

Legal entities · 1

corporate structure

Magnitude AI Inc.

In the news

Sidekick - Automation for the rest of usycombinator.com · Aug 2025

Frequently asked questions

What does Magnitude do?: Magnitude is an AI coding agent optimized for open-source language models like GLM, Kimi, and DeepSeek, designed to generate and execute code with improved reliability and efficiency. The platform serves software developers and teams looking to build with open weights models at lower cost than frontier API pricing.
Who founded Magnitude?: Magnitude was founded by Tom Greenwald, Anders Lie in 2025.
Who are Magnitude's investors?: Magnitude's investors include Eight Capital, Y Combinator, Blast.Club.
Where is Magnitude headquartered?: Magnitude is headquartered in San Francisco, US.