Top accelerator startups

Startups14,448Programs29

14,448 startups · 29 programs

Envariant

Active · Interpretability and reasoning infra for foundation models.

WebsiteYC profile

Why it ranks

How the rank works
4signal of 100 · rising 4
  • went through YCProgram · this site+4

A sum of public facts, not a judgement and not investment advice.

Competitors

AIThe Forecasting CompanyShared: foundation modelYC S24ParisStartup →AIPiramidalShared: foundation modelYC W24New York CityStartup →AIOutpost BioShared: foundation modelSeedcamp 2025Startup →AICactus ComputeShared: foundation modelYC S25San FranciscoStartup →AITrimShared: foundation modelYC W25San FranciscoStartup →OtherTwelveLabsShared: foundation modelStartup →OtherkausableShared: foundation model, reasoningStartup →OtherF13Shared: foundation modelStartup →
Companies closest to Envariant
Company
The Forecasting CompanyShared: foundation modelYC S24ActiveAI
PiramidalShared: foundation modelYC W24ActiveAI
Outpost BioShared: foundation modelSeedcamp 2025Not statedAI
Cactus ComputeShared: foundation modelYC S25ActiveAI, Devtools
TrimShared: foundation modelYC W25ActiveAI, Devtools
TwelveLabsnot in a program hereShared: foundation modelElsewhereOther
kausablenot in a program hereShared: foundation model, reasoningElsewhereOther
F13not in a program hereShared: foundation modelElsewhereOther

Adjacent

AIInactiveCreatorMLShared: foundation modelYC W23New York CityStartup →AIRanvier SystemsShared: foundation modelSPC 2026New YorkStartup →AIAllus AIShared: foundation model, enablingYC F25AtlantaStartup →AILyonShared: foundation model, controlYC F26San FranciscoStartup →AIAnto BiosciencesShared: foundation modelYC F25San FranciscoStartup →
Companies next to Envariant
Company
CreatorMLShared: foundation modelYC W23InactiveAI, Data
Ranvier SystemsShared: foundation modelSPC 2026Not statedAI
Allus AIShared: foundation model, enablingYC F25ActiveAI
LyonShared: foundation model, controlYC F26ActiveAI, Data
Anto BiosciencesShared: foundation modelYC F25ActiveAI

Also from W26 in AI

All of W26
AI/dev/fast/dev/fast is the AI-native code forgeYC W26San FranciscoStartup →AI10x ScienceThe AI-native platform for next-generation protein characterization.YC W26San FranciscoStartup →AI21stUI building blocks for the agentic internetYC W26San FranciscoStartup →AIAemonThe Forward-Deployed AI Research EngineerYC W26San FranciscoStartup →AIAgentic FabriqThe control plane for AI agents.YC W26San FranciscoStartup →AIAlt-XBuilding the best venue for private markets exposure.YC W26Los AngelesStartup →
Company
/dev/fast/dev/fast is the AI-native code forgeteam of 4ActiveAI, Devtools
10x ScienceThe AI-native platform for next-generation protein characterization.team of 5hiringActiveAI
21stUI building blocks for the agentic internetteam of 3ActiveAI, Devtools
AemonThe Forward-Deployed AI Research Engineerteam of 3hiringActiveAI, Devtools
Agentic FabriqThe control plane for AI agents.team of 2ActiveAI
Alt-XBuilding the best venue for private markets exposure.team of 2ActiveAI, Data

Founders

  • Varun AgarwalFounder/CEO

About Envariant

Envariant is an AI interpretability and reasoning SDK enabling foundation model builders to analyze, steer, and control their model's behaviors.

YC batch
W26 · Winter 2026
Status, per YC
Active
Category
AI, Developer tools
Team size
1
Location
San Francisco, CA, USA
Founded
2025
Checked
7h ago

Envariant in W26: 199 companies, 81% AI

LinkedIn

Envariant: questions

Which YC batch was Envariant in?

Envariant was in Y Combinator's Winter 2026 batch (W26).

Is Envariant still active?

Y Combinator lists Envariant as active.

Who founded Envariant?

Envariant's founders, as listed on its YC page: Varun Agarwal (Founder/CEO).

Where is Envariant based?

Envariant lists San Francisco, CA, USA as its location on YC's directory.