Niche — LLM

Foundation model & LLM startups

Foundation model and LLM-focused companies — from frontier labs to fine-tuning, RAG, and specialized models.

RW
Runway
AI tools for the next generation of storytellers.
AI·Series D
LC
LangChain
The framework + platform for LLM apps.
AI·Series A
PC
Pinecone
The vector database for AI applications.
AI·Series B
FW
Fireworks AI
Productive AI platform with the fastest inference.
AI·Series B
AR
Arize AI
Observability for ML and LLM applications.
AI·Series B
SN
Snorkel AI
The AI data development platform for enterprise.
AI·Series C
LA
Lakera
Security for LLM apps.
AI·Series A
SK
Skild AI
A general-purpose AI brain for any robot.
AI·Series A
PI
Physical Intelligence (π)
Bringing general-purpose AI to the physical world.
AI·Series B
SL
Spellbook
AI contract drafting + review in Microsoft Word.
AI·Series A
E2
E2B
Sandboxes for AI agents.
AI·Seed
AQ
AfterQuery
We teach machines how experts think
AI·Series A
PL
Parallel
A parallel web, for AIs
AI·Series B
LT
Letta
Memory-first infrastructure for AI agents
AI·Seed
VL
Vellum AI
LLM product development and evaluation platform
AI·Seed
QD
Qdrant
High-performance vector search engine
AI·Series A
CH
Chroma
Open source AI-native embedding database
AI·Seed
TR
Trim
A foundation model for physics.
AI·YC W25
TF
The Forecasting Company
Foundation models for time series
AI·YC S24
AN
Anthrogen
Training the next generation of protein foundation models
AI·YC S24
AY
Anyscale
Scale Python and AI applications on any infrastructure
AI·Series C
AL
AnythingLLM
The all-in-one open source AI desktop application
AI·Bootstrapped
CM
CAMEL AI
Open source multi-agent AI research framework
AI·Bootstrapped
OL
Ollama
Run large language models locally
AI·Bootstrapped
OR
OpenRouter
Unified API for every major LLM
AI·Seed
TL
Traceloop
Open-source LLM observability with OpenTelemetry
AI·Seed
PK
Portkey
AI gateway and LLMOps platform for production
AI·Series A
HL
Humanloop
Prompt management and LLM evaluation platform
AI·Series A
VF
Voiceflow
Platform to design and deploy AI agents
AI·Series B
A2
AI21 Labs
Enterprise LLMs built for reliability and reasoning
AI·Series C
AR
Argilla
Open-source data labeling platform for AI
AI·Seed
JN
Jan
Open source ChatGPT alternative that runs offline
AI·Bootstrapped
VA
Vapi
Voice AI infrastructure for developers
AI·Seed
LI
LlamaIndex
Data framework for building LLM applications
AI·Series A
NA
Nomic AI
Open-source embeddings and data visualisation
AI·Seed
UI
Unstructured
Parse and prepare any document for LLMs
AI·Series B
NR
Nous Research
Open-source frontier AI research and fine-tuning
AI·Series A
LQ
Liquid AI
Novel AI architecture with Liquid Foundation Models
AI·Series A
FI
Fixie
An automation platform for large language models
AI
TW
TwelveLabs
Multimodal foundation models for video understanding
AI
NG
New Generation
A new kind of AI for commerce
AI
V7
V7
The data engine for computer vision
AI
LO
Lorikeet
AI-powered customer support platform
AI
YO
You
AI for productivity
AI
AM
Adaptive ML
AI, tuned to production
AI
MI
Mirage
Short-form videos powered by AI
AI
TE
TensorZero
Open-source LLM infra
AI
ST
StackAI
No-code platform to build AI agents
AI
EU
Eudia
Augment your legal team with AI
AI
DR
Dyna Robotics
High performance general-purpose robots
AI
SU
Summation
Decision-grade AI platform
AI
DA
Datacurve
Frontier code data for foundation models
AI
RE
Reflection
Frontier open intelligence accessible to all
AI
CR
Credal
Secure AI assistants for enterprise
AI
PI
Pienso
No-code tools for training AI models
AI
SA
Sapien
AI coworker for CFOs
AI
OS
Osmosis
Create task-specific models that beat foundation models
AI
DE
DeepJudge
Precision AI search for legal teams
AI
PO
Poolside
Frontier research to operational intelligence
AI
RE
Relace
LLMs for code generation
AI
IN
Inception
Pioneering a new generation of LLMs
AI
PA
Peec AI
AI search analytics for brands
AI
FR
Flexion Robotics
The next generation of humanoids
AI
LG
LGND
ChatGPT for the Earth
AI
CA
Contextual AI
Build specialized RAG agents
AI
GI
General Intuition
The frontier research lab dedicated to games
AI
LL
LLMArena
Find the best AI for you
AI
MY
Mytra
Automated robotic storage
AI
PA
Parloa
Conversation AI for customer service
AI
IN
Inferact
The world's AI inference engine
AI
AD
Adaline
Iterate, evaluate, deploy, and monitor LLMs
AI
DE
Decart
A new era of real-time generative experiences
AI
MO
Modular
VMware for the AI era
AI
PO
Positron
Energy-efficient AI chips
AI
PA
Paradigm
Agentic spreadsheets
AI
FL
Floqer
The CRM data engine
AI