Fundraising Fox

Magnitude

YC S25

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

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 Sagekit · Sidekick

AI & Machine LearningDeveloper ToolsEnterprise SoftwareArtificial IntelligenceOpen SourceInfrastructureAIUnited States of AmericaAmerica / Canada

Founders & leadership· Y Combinator alumni (S25)

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

TGTom Greenwald
Tom Greenwaldin𝕏Co-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.
ALAnders Lie
Anders Liein𝕏Co-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 · 2

Y CombinatorSan Francisco · $500K
Ballistic Venturesreported · 2 sourcesSan Francisco · $1M – $5M

Funding

SEC filings, press & company announcements

$20M disclosed across 2 rounds · 2026

Source: company announcements and press reports — follow each round's link for the claim.

In the news

Magnitude Launches from Stealth with $10M Seed Funding and Introduces the First Autonomous AI Workforce to Enable Third-Party Risk Management Teams in the Mythos Eratheaiinsider.tech · Jun 2026Magnitude secures $10M seed for AI-driven third‑party risk platform | SaaS M&A and VC Dealssaasrise.com · Jun 2026Magnitude raises $10m to automate third-party riskfintech.global · Jun 2026Magnitude Raises $10M to Govern AI Supply Chain Risk | AI Weeklyaiweekly.co · Jun 2026Magnitude Emerges From Stealth Mode With $10 Million in Funding - SecurityWeeksecurityweek.com · Jun 2026Magnitude Raises $10M in Seed Fundingfinsmes.com · Jun 2026Sidekick - 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 Y Combinator, Ballistic Ventures.
How much funding has Magnitude raised?
Magnitude has disclosed $20M raised across 2 rounds.
Where is Magnitude headquartered?
Magnitude is headquartered in San Francisco, US.