Butter

Muscle Memory Cache for Agents

ActiveY Combinator

Updated: Dec 2, 2025 ·

About

Butter is building an LLM proxy that records and deterministically replays tool call trajectories. Our goal is to get LLMs out of the hotpath for repetitive tasks, increasing speed, reducing variability, and eliminating token costs for the many cases that could have just been a script.

Recent News & Mentions

Nov 1, 2022FundingButter - Series A Apr 1, 2021FundingButter - Seed

Financial History

Butter has raised $12.0M across 2 funding rounds. Most recently, it raised $9.0M Series A in November 2022.

Total Raised

$12.0M

Valuation

N/A

Funding Rounds Raised

Date	Round	Lead Investors	Other Investors
Nov 1, 2022	$9.0M Series A		Alt Capital, Arrive, Ascend Vietnam Ventures, Basis Set Ventures, Bond, Coatue, CRV, General Catalyst, Gradient Ventures, Khosla Ventures, Liquid 2 Ventures, MizMaa Ventures, Hans Tung, Outcast Ventures, Peterson Partners, SciFi VC, Soma Capital, Arash Ferdowsi, Bernard Arnault, Claire Hughes Johnson, Frederic Kerrest, Jenna Hannon, Jon Kol, Mathilde Collin, Sahin Boydas, Theresa Johnson, Tony Xu
Apr 1, 2021	$3.0M Seed		Capital Today, Goat Capital, Mantis VC, Tribe Capital, Unpopular Ventures, Andy Katz - Mayfield, Curtis Lee, George Ruan, Nick Green, Scott Tannen, Vikas Sabnani, Vince Thompson

Financial History

Butter has raised $12.0M across 2 funding rounds.

Total Raised

$12.0M

Valuation

N/A

Leadership Team

Key people at Butter.

Erik Dunteman

Founder

Leadership Team

Key people at Butter.

Erik Dunteman

Founder

Deep Dive

I appreciate the detailed formatting instructions, but I need to clarify an important limitation: the search results provided do not contain information about "Butter - Muscle Memory Cache for Agents."

The search results reference several different products named "Butter":

1. Butter (Food Distribution SaaS) — A platform acquired by GrubMarket in May 2024 that digitizes food distribution with AI

2. Butter (Developer Platform) — A web application development and deployment platform that abstracts infrastructure complexities

3. Butter Payments — A machine learning-based payment recovery platform that reduces involuntary churn

4. Butter (Collaboration Tool) — A virtual collaboration platform for facilitating interactive sessions

None of these match "Muscle Memory Cache for Agents," which suggests this may be a product that either:

Does not yet have substantial public coverage in available search results
Is a very recent or unreleased project
May be referred to by a different name in public sources

To provide you with the comprehensive analysis you've requested—covering high-level overview, origin story, core differentiators, role in the tech landscape, and future outlook—I would need access to accurate information about this specific product.

Could you provide additional context or clarification about which Butter product you're interested in, or share more details about "Muscle Memory Cache for Agents"? This would allow me to deliver the detailed investment analysis you're looking for.

Sources

Frequently Asked Questions

Who founded Butter?

Butter was founded in 2024 by Erik Dunteman (Founder).

How much funding has Butter raised?

Butter has raised $12.0M in total across 2 funding rounds.

Who are Butter's investors?

Butter's investors include Alt Capital, Arrive, Ascend Vietnam Ventures, Basis Set Ventures, Bond, Coatue, CRV, General Catalyst, Gradient Ventures, Khosla Ventures, Liquid 2 Ventures, MizMaa Ventures.