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#API-first

60 AI startups tagged "API-first"

Anthropic

US est. 2021

AI safety lab building Claude — a helpful, harmless, honest AI assistant.

Raised
$133.1B
Stage
S-D
86

OpenAI

US est. 2015

Creator of ChatGPT, GPT-4, and the leading frontier AI lab.

Raised
$193.3B
Stage
S-E
83

Hugging Face

US est. 2016

The AI community building the future of machine learning.

Raised
$970M
Stage
S-E
77

ElevenLabs

GB est. 2022

The most realistic AI voices for creators, developers, and enterprise.

Raised
$1.1B
Stage
OTHER
76

Moonshot AI

CN est. 2023

Maker of Kimi — the long-context AI chatbot.

Raised
$3B
Stage
S-C
76

Mistral AI

Verified
FR est. 2023

Open and efficient foundation models

Raised
$6.3B
Stage
Debt
76

MiniMax

IPO
CN est. 2021

Chinese AI lab behind Hailuo video and Talkie companions.

Raised
$2.2B
Stage
IPO
71

Synthesia

GB est. 2017

AI video creation platform with realistic avatars.

Raised
$802.4M
Stage
S-E
69

Grammarly

US est. 2009

AI writing assistant for individuals and teams.

Raised
$1.2B
Stage
GROWTH
69

Notion AI

Verified
US est. 2013

Connected AI workspace

Raised
$270M
Stage
SECONDARY
68

DataRobot

US est. 2012

The only unified agent workforce platform built for enterprise outcomes, not endless pilots.

Raised
$1.1B
Stage
S-G
66

Databricks

Verified
US est. 2013

The data + AI company

Raised
$10.6B
Stage
OTHER
65

Decagon

Verified
US est. 2023

AI agents that actually solve customer problems

Raised
$546M
Stage
S-D
64

Baseten

US est. 2019

Deploy and scale AI models in production with the fastest inference infrastructure.

Raised
$450M
Stage
S-E
64

Abnormal Security

US est. 2018

Protect humans with behavioral AI against phishing, social engineering, and account takeovers.

Raised
$760M
Stage
OTHER
64

Outreach

US est. 2014

AI sales execution platform for outbound at enterprise scale.

Raised
$489M
Stage
S-G
64

Jasper

US est. 2021

AI copilot for enterprise marketing teams.

Raised
$125M
Stage
S-C
63

Leonardo.Ai

AU est. 2022

AI-powered creative suite for image and video generation.

Raised
$31M
Stage
ACQUISITION
62

Fireworks AI

Verified
US est. 2022

Production-grade generative AI serving

Raised
$327M
Stage
S-C
62

Nscale

Verified
GB est. 2024

European sovereign AI infrastructure

Raised
$3.1B
Stage
S-C
62

Modal

US est. 2021

High-performance AI infrastructure with sub-second cold starts and instant autoscaling.

Raised
$442M
Stage
S-C
62

Cohere

Verified
CA est. 2019

Enterprise AI for language understanding

Raised
$2.4B
Stage
S-E
60

DeepL

DE est. 2017

AI solutions for accurate text, file, and voice translation, and business task automation.

Raised
$415M
Stage
S-C
60

Tines

IE

The intelligent workflow platform to securely scale AI and automation, integrating agents, teams, and tools with speed and control.

Raised
$146.2M
Stage
S-B
60

Runware

GB est. 2023

One API for fast generative AI inference

Raised
$66M
Stage
S-A
60

You.com

US est. 2020

The productivity search engine with AI agents.

Raised
$175M
Stage
S-C
59

Inflection AI

ACQUIRED
US est. 2022

Personal AI for everyone

Raised
$1.6B
Stage
S-B
59

Together AI

Verified
US est. 2022

The open AI cloud

Raised
$1.1B
Stage
S-C
59

LangChain

Verified
US est. 2022

Build context-aware AI applications

Raised
$125M
Stage
S-B
59

Murf AI

IN est. 2020

Studio-quality AI voiceovers in 20+ languages.

Raised
$13M
Stage
S-A
58

PolyAI

GB est. 2017

The world's most lifelike voice AI agents for enterprise customer service.

Raised
$120M
Stage
S-C
58

Dust

FR est. 2023

Deploy, orchestrate, and govern fleets of specialized AI agents safely connected to your company's knowledge and tools.

Raised
$21M
Stage
S-A
58

Baichuan AI

CN est. 2023

Empowering the world with knowledge and professional services through breakthrough language AI.

Raised
$1.0B
Stage
S-A
58

Skydio

US est. 2014

Autonomous drones for inspection, public safety, and defense.

Raised
$825M
Stage
S-F
58

H Company

FR est. 2024

Action-oriented agentic foundation models from Paris

Raised
$220M
Stage
Seed
58

Stability AI

GB est. 2020

Open models for image, video, audio, and 3D.

Raised
$101M
Stage
S-A
57

Hex

US est. 2019

The collaborative data workspace with AI.

Raised
$70M
Stage
S-C
57

Deepgram

US est. 2015

Voice AI platform for developers building speech-to-text, text-to-speech, and speech-to-speech products

Raised
$239M
Stage
S-C
57

Writer

Verified
US est. 2020

Full-stack generative AI for enterprise

Raised
$321M
Stage
S-C
57

Exa

Verified
US est. 2022

Search for AI applications

Raised
$102M
Stage
S-B
57

CrewAI

US est. 2024

Framework for orchestrating role-playing autonomous AI agents

Raised
$18M
Stage
S-A
57

SambaNova

US

The fastest AI inference platform, purpose-built for agentic AI with custom dataflow technology and three-tier memory architecture.

Raised
$1.4B
Stage
S-F
57

Paradox

US

Conversational AI hiring software that automates tasks and streamlines the entire recruitment process.

Raised
$232M
Stage
S-C
57

Mercury

US est. 2017

Radically different online business banking for startups, small businesses, and scaling companies.

Raised
$700M
Stage
S-D
57

Groq

Verified
US est. 2016

Fastest AI inference on the planet

Raised
$2.3B
Stage
S-E
56

Cerebras Systems

Verified
US est. 2016

Wafer-scale AI chips for unprecedented speed

Raised
$8.0B
Stage
OTHER
56

Hume AI

Verified
US est. 2021

Empathic AI voice and emotion intelligence

Raised
$73.9M
Stage
S-B
56

Pecan AI

IL est. 2018

Predictive analytics platform with AI-generated SQL models.

Raised
$117M
Stage
S-C
56

Clay

US est. 2017

AI-powered sales prospecting and data enrichment.

Raised
$146M
Stage
S-C
55

Pinecone

Verified
US est. 2019

The vector database for AI

Raised
$228M
Stage
S-C
55

Recraft

GB est. 2022

Brand-consistent AI image generation

Raised
$42M
Stage
S-B
55

Chroma

US est. 2022

Open-source search infrastructure for AI with vector, full-text, regex, and metadata search.

Raised
$20.3M
Stage
Seed
55

Qdrant

DE est. 2021

High-performance vector search engine built in Rust for production-grade AI retrieval.

Raised
$50M
Stage
S-B
55

Insilico Medicine

US

Accelerating drug discovery and development through generative AI and advanced bioinformatics platforms.

Raised
$510M
Stage
S-E
55

Cognism

GB est. 2015

Premium B2B prospecting data with mobile numbers and intent signals.

Raised
$123.5M
Stage
S-C
55

Pricefx

US est. 2011

Cloud-native pricing optimization with AI rebate management.

Raised
$131M
Stage
S-C
55

Scale AI

Verified
US est. 2016

Data labeling and AI infrastructure platform powering frontier models for enterprises and governments.

Raised
$14.3B
Stage
STRATEGIC
54

Ideogram

Verified
CA est. 2023

AI image generation with perfect text rendering

Raised
$96.5M
Stage
S-A
54

Kensho

Verified
US est. 2013

AI for financial intelligence and analytics

Raised
$123M
Stage
ACQUISITION
54

Yellow.ai

Transform CX & EX with Yellow.ai’s Agentic AI platform to autonomously drive human-like conversations at scale.

Raised
$102.2M
Stage
S-C
54