Cumulus LabsThe Fastest Multimodal Inference OSteam of 2hiringYC W26·Active·AI, Devtools | AI, Devtools | Active | YCW26 |
OrthogonalAgentic Payments for APIsteam of 2hiringYC W26·Active·AI, Devtools | AI, Devtools | Active | YCW26 |
SalusGuardrails to validate your agent's actions before they executeteam of 2hiringYC W26·Active·AI, Devtools | AI, Devtools | Active | YCW26 |
shortkitMedia infra for consumer appsteam of 2hiringYC W26·Active·Devtools | Devtools | Active | YCW26 |
ZatannaBuilding the infrastructure for AI to interact with softwareteam of 2hiringYC W26·Active·AI, Devtools | AI, Devtools | Active | YCW26 |
SupabaseBuild in a weekend. Scale to millions.110.8k starsteam of 120YC S20·Active·Data, Devtools | Data, Devtools | Active | YCS20 |
AgentMailEmail Inboxes for AI Agentsteam of 10hiringYC S25·Active·AI, Devtools | AI, Devtools | Active | YCS25 |
MagneticAI Tax Preparer for CPA firmsteam of 10hiringYC S25·Active·AI, Devtools | AI, Devtools | Active | YCS25 |
JinkoTravel Search & Booking Infrastructure for AI agentsteam of 6YC F26·Active·AI, Devtools | AI, Devtools | Active | YCF26 |
The Letter CompanyThe world's first coding agent, harness, & IDE for growth engineering.team of 6YC F26·Active·AI, Devtools | AI, Devtools | Active | YCF26 |
Context.devWeb data API for agentsteam of 6YC S26·Active·AI, Devtools | AI, Devtools | Active | YCS26 |
Arga LabsReal-world sandboxes to test and train AI agentsteam of 6YC X26·Active·AI, Devtools | AI, Devtools | Active | YCX26 |
Deep InteractionsMultiplayer AI app builderteam of 6YC X26·Active·AI, Devtools | AI, Devtools | Active | YCX26 |
InstaBoxCloud computers for AI agentsteam of 6YC X26·Active·AI, Devtools | AI, Devtools | Active | YCX26 |
LiteLLMCall every LLM API like it's OpenAI [100+ LLMs]59.6k starsteam of 20YC W23·Active·AI, Devtools | AI, Devtools | Active | YCW23 |
KERNELCrazy fast, open source infra for AI agents to use the Internetteam of 22YC S25·Active·AI, Devtools | AI, Devtools | Active | YCS25 |
MOVEdotAI Agents for Hardware Engineeringteam of 10YC F25·Active·AI, Devtools | AI, Devtools | Active | YCF25 |
AfterQueryApplied research lab curating data solutions for foundation model…team of 30hiringYC W25·Active·AI, Data, Devtools | AI, Data, Devtools | Active | YCW25 |
WaferAI that makes AI fastteam of 21YC S25·Active·AI, Devtools | AI, Devtools | Active | YCS25 |
RaindropSentry for AI Agentsled by Lightspeedteam of 9YC W24·Active·AI, Devtools | AI, Devtools | Active | YCW24 |
Dedalus LabsPersistent computers for AI agentsteam of 8hiringYC S25·Active·AI, Devtools | AI, Devtools | Active | YCS25 |
InterfereGive engineering, product, and design teams insight into unseen issuesteam of 8hiringYC S25·Active·AI, Devtools | AI, Devtools | Active | YCS25 |
Aikido TechnologiesClean marine AI datacentersteam of 5YC F26·Active·AI, Devtools | AI, Devtools | Active | YCF26 |
ObsessionDBReal-time data warehouse for agentsteam of 5YC F26·Active·AI, Data, Devtools | AI, Data, Devtools | Active | YCF26 |
Sona8Voice agents survey employees to map, improve & automate workflowsteam of 5YC F26·Active·AI, Devtools | AI, Devtools | Active | YCF26 |
CautionHosting platform for software you can't afford to have hackedteam of 5YC S26·Active·AI, Devtools | AI, Devtools | Active | YCS26 |
RiftenEarned intelligence. An independent AI research lab.team of 5YC S26·Active·AI, Devtools | AI, Devtools | Active | YCS26 |
OvershootWe optimize inference stacks for teamsteam of 5YC W26·Active·AI, Devtools | AI, Devtools | Active | YCW26 |
SixtyfourIntelligence Infrastructure on People and Entitiesteam of 12hiringYC X25·Active·AI, Devtools | AI, Devtools | Active | YCX25 |
LuminalMaking AI run fast on any hardware.team of 7hiringYC S25·Active·AI, Devtools | AI, Devtools | Active | YCS25 |
MSPilotTurn AI adoption into a recurring revenue line.team of 3hiringYC F25·Active·AI, Devtools | AI, Devtools | Active | YCF25 |
Scott AIThe planning layer for teams that build with coding agentsteam of 3hiringYC F25·Active·AI, Devtools | AI, Devtools | Active | YCF25 |
SourcebotHelping humans and AI agents understand massive codebasesteam of 3hiringYC F25·Active·AI, Devtools | AI, Devtools | Active | YCF25 |
CodeAnt AIAutonomous offensive and defensive cybersecurity platformteam of 252 programsYC W24 +1·Active·AI, Devtools | AI, Devtools | Active | YC +1W24 |
HUDPlatform and marketplace for RL environments and AI datateam of 24hiringYC W25·Active·AI, Devtools | AI, Devtools | Active | YCW25 |
CascoAutonomous security testing for web apps, APIs, cloud, and AI systemsteam of 10hiringYC X25·Active·AI, Devtools | AI, Devtools | Active | YCX25 |
GodelaAI Physics Engine to replace simulations and prototypesteam of 10hiringYC X25·Active·AI, Devtools | AI, Devtools | Active | YCX25 |
AviernUnmanned cargo airplanesteam of 4YC F26·Active·Devtools | Devtools | Active | YCF26 |
Dreamscale LabsReal-time cloud inference for robotics.team of 4YC F26·Active·AI, Devtools | AI, Devtools | Active | YCF26 |
TilionSuper fast, unblockable browser infra for agentsteam of 4YC F26·Active·AI, Devtools | AI, Devtools | Active | YCF26 |
ConiferIntelligent decisions for critical AI operationsteam of 4YC S26·Active·AI, Devtools | AI, Devtools | Active | YCS26 |
OneTrianglePrefill optimizations for the fastest inferenceteam of 4YC S26·Active·AI, Devtools | AI, Devtools | Active | YCS26 |
OpenVectorAI that turns any camera to an autonomous worker with real-time visionteam of 4YC S26·Active·AI, Devtools | AI, Devtools | Active | YCS26 |
ExpanseUnlock wasted GPU capacity.team of 4YC X26·Active·AI, Devtools | AI, Devtools | Active | YCX26 |
PLAN0 AIConstruction Cost Intelligence.team of 4YC X26·Active·AI, Data, Devtools | AI, Data, Devtools | Active | YCX26 |
/dev/fast/dev/fast is the AI-native code forgeteam of 4YC W26·Active·AI, Devtools | AI, Devtools | Active | YCW26 |
ARC Prize FoundationAI benchmarks that measure general intelligence and inspire new ideasteam of 4YC W26·Active·AI, Devtools | AI, Devtools | Active | YCW26 |
ChamberThe AIOps Agent for ML Teamsteam of 4YC W26·Active·AI, Devtools | AI, Devtools | Active | YCW26 |
ShofoThe World's Largest Video Libraryteam of 4YC W26·Active·AI, Data, Devtools | AI, Data, Devtools | Active | YCW26 |
Synthetic SciencesInfrastructure for Autonomous Scienceteam of 4YC W26·Active·AI, Devtools | AI, Devtools | Active | YCW26 |
AutumnBilling infrastructure for AIteam of 5hiringYC S25·Active·AI, Data, Devtools | AI, Data, Devtools | Active | YCS25 |
ManufactCloud infrastructure for MCP servers and Claude / ChatGPT plugins.team of 5hiringYC S25·Active·AI, Devtools | AI, Devtools | Active | YCS25 |
TesoraFrontier AI for Actuariesteam of 5hiringYC S25·Active·AI, Devtools | AI, Devtools | Active | YCS25 |
LemmaProduction Monitoring for AI agentsteam of 2hiringYC F25·Active·AI, Data, Devtools | AI, Data, Devtools | Active | YCF25 |
Unsiloed AIAPI for parsing multimodal unstructured datateam of 2hiringYC F25·Active·AI, Devtools | AI, Devtools | Active | YCF25 |
SciloopExpert STEM reasoning data for frontier AI labs.team of 6YC F25·Active·AI, Data, Devtools | AI, Data, Devtools | Active | YCF25 |
AirweaveThe open-source context retrieval layer for agentsteam of 7hiringYC X25·Active·AI, Devtools | AI, Devtools | Active | YCX25 |
MesmerWe build software factories for engineering teamsteam of 7hiringYC X25·Active·AI, Devtools | AI, Devtools | Active | YCX25 |
FivetranThe leader in automated data movementteam of 1.2k11.8k starsYC W13·Active·Data, Devtools | Data, Devtools | Active | YCW13 |
SpurSpur is the validation infrastructure enterprises use to ship at the…team of 153 programsYC S24 +2·Active·AI, Devtools | AI, Devtools | Active | YC +2S24 |