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14,448 startups · 29 programs

Caution

Active · Hosting platform for software you can't afford to have hacked

WebsiteYC profile

Why it ranks

How the rank works
8signal of 100 · rising 8
  • team of 5Team size · YC's directory+4
  • went through YCProgram · this site+4

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

Competitors

AITinfoilShared: confidential computing, confidential compute, cloud computingYC X25San FranciscoStartup →Developer toolsInactiveCakeworkShared: cloud computing, infrastructure, hostingYC W23SeattleStartup →Developer toolsKoalaLabShared: source codeAlchemist Class 39SeattleStartup →AIVoidShared: lets developer, source codeYC S24San FranciscoStartup →AIDraftbitShared: source codeYC W18ChicagoStartup →
Companies closest to Caution
Company
TinfoilShared: confidential computing, confidential compute, cloud computingYC X25ActiveAI, Devtools
CakeworkShared: cloud computing, infrastructure, hostingYC W23InactiveDevtools
KoalaLabShared: source codeAlchemist Class 39Not statedDevtools
VoidShared: lets developer, source codeYC S24ActiveAI, Devtools
DraftbitShared: source codeYC W18ActiveAI, Devtools

Adjacent

Developer toolsInactiveAppHarborShared: lets developer, cloud computing, configurationYC W11San FranciscoStartup →Developer toolsFly.ioShared: developer deploy, infrastructureYC W20ChicagoStartup →AIThunder ComputeShared: cloud computing, infrastructure, computeYC S24San FranciscoStartup →AIBeamShared: cloud computing, infrastructureYC W22New York CityStartup →AIMaritimeShared: cloud computing, infrastructureYC F26San FranciscoStartup →
Companies next to Caution
Company
AppHarborShared: lets developer, cloud computing, configurationYC W11InactiveDevtools
Fly.ioShared: developer deploy, infrastructureYC W20ActiveDevtools
Thunder ComputeShared: cloud computing, infrastructure, computeYC S24ActiveAI, Data, Devtools
BeamShared: cloud computing, infrastructureYC W22ActiveAI, Devtools
MaritimeShared: cloud computing, infrastructureYC F26ActiveAI, Devtools

Also from S26 in AI

All of S26
AIClickManaged Agents APIYC S26San FranciscoStartup →AIArchalAPI sandboxes, built for AI agentsYC S26San FranciscoStartup →AIAutoresearch, Inc.Autoresearch as a service: we solve your hardest measurable problemsYC S26San FranciscoStartup →AIComputableDerivatives Exchange for ComputeYC S26New York CityStartup →AIDecaworkTraining company-specific models that approve AI actions.YC S26San FranciscoStartup →AIExperiential LabsOpen source AI gateway that turns your traffic into better modelsYC S26San FranciscoStartup →
Company
ClickManaged Agents APIActiveAI, Devtools
ArchalAPI sandboxes, built for AI agentsteam of 2ActiveAI, Devtools
Autoresearch, Inc.Autoresearch as a service: we solve your hardest measurable problemsteam of 3ActiveAI, Devtools
ComputableDerivatives Exchange for Computeteam of 2ActiveAI, Devtools
DecaworkTraining company-specific models that approve AI actions.2 programsteam of 2ActiveAI, Devtools
Experiential LabsOpen source AI gateway that turns your traffic into better modelsteam of 2ActiveAI, Devtools

Founders

  • Anton LivajaFounder/CEO
  • Ksenia LeskoFounder
  • Lance VickFounder/CTO

About Caution

Caution is a hosting platform for software you can't afford to get hacked. It simplifies and extends confidential compute, and lets developers deploy workloads to secure enclaves in minutes and give customers, auditors, and counterparties cryptographic proof that production is running the exact reviewed source code, build, configuration, and runtime - not an opaque binary controlled by a cloud operator or internal admin. Confidential computing hardware exists, but the tooling is too fragmented and incomplete for most teams to use well. Today, attestation often proves only that a binary has a certain hash; it does not prove what source code produced that binary. Building the missing deployment, reproducibility, and verification layer requires specialized security engineering and often locks teams into one cloud or hardware stack. Caution turns that into a simple git-based workflow that builds reproducible enclave images, provisions infrastructure, and lets anyone independently verify what is running. We built Caution after years securing high-risk systems through Distrust, where we worked with hedge funds, custodians, blockchain teams, cloud platforms, and critical grid operators on systems responsible for more than $600B in assets. Again and again, the same problem showed up: teams running mission-critical infrastructure could not reliably prove what was executing in production. As AI, fintech, healthcare, and regulated data collaboration move into the cloud, "trust us" is no longer enough. Caution is a general-purpose platform: if it runs on a server, it can run verifiably on Caution. We're starting where trust failures cost the most, but we believe verifiable compute will become the default way software runs, the same way HTTPS became the default way it's served. Infrastructure you can verify, not trust.

YC batch
S26 · Summer 2026
Status, per YC
Active
Category
AI, Developer tools
Team size
5
Location
George Town, George Town, Cayman Islands
Founded
2025
Checked
6h ago

YC tags: Cybersecurity, Cloud Computing, Infrastructure

Caution in S26: 229 companies, 88% AI

LinkedIn

Caution: questions

Which YC batch was Caution in?

Caution was in Y Combinator's Summer 2026 batch (S26).

Is Caution still active?

Y Combinator lists Caution as active.

Who founded Caution?

Caution's founders, as listed on its YC page: Anton Livaja (Founder/CEO), Ksenia Lesko (Founder), Lance Vick (Founder/CTO).

Where is Caution based?

Caution lists George Town, George Town, Cayman Islands as its location on YC's directory.