Skip to main content
NeuronFeed
LLM by OpenAI

GPT-4 — Startups Built With GPT-4

OpenAI's flagship multimodal reasoning model. The category default for most production AI apps.

Perplexity

US est. 2022

AI-powered answer engine delivering real-time, cited responses to complex queries.

Raised
$2.0B
Stage
S-F
82

Notion AI

Verified
US est. 2013

Connected AI workspace

Raised
$270M
Stage
SECONDARY
75

Jasper

US est. 2021

AI copilot for enterprise marketing teams.

Raised
$125M
Stage
S-C
64

Writesonic

US est. 2020

AI writer, editor, and SEO tool for content teams.

Raised
$2.7M
Stage
Seed
57

Copy.ai

US est. 2020

AI platform for go-to-market teams.

Raised
$11M
Stage
S-B
56

Lindy

US est. 2022

Build AI assistants in minutes

Raised
$49.9M
Stage
S-B
56

Hightouch

US est. 2018

Go from insight to live campaign in minutes – powered by all your data, brand knowledge, and AI.

Raised
$150M
Stage
S-D
56

Confident AI

US est. 2024

DeepEval-powered LLM evaluation and observability

Raised
$2.2M
Stage
Seed
55

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

Nabla

FR est. 2018

Smarter clinical workflows and elevated care through ambient AI, dictation, and real-time intelligence for healthcare professionals.

Raised
$43M
Stage
S-B
52

Gamma

US

Effortless AI design for presentations, websites, and more, helping you create captivating content almost as quickly as you can think it up.

Raised
$87M
Stage
S-B
50

Voiceflow

CA

Build, launch, and scale advanced AI agents for support, lead generation, and beyond without code.

Raised
$35M
Stage
S-A
50

Superlog

US est. 2026

AI-native observability that installs itself and ships pull requests to fix the bugs it finds.

Raised
$500K
Stage
Seed
49

Manicule

US est. 2025

AI-native documentation studio for developer tool companies.

Raised
$500K
Stage
Pre-S
48

Replicas

US est. 2026

Background coding agents that delegate engineering work to sandboxed AI in Slack, Linear, and GitHub.

Raised
$500K
Stage
Seed
45

Klarify

US est. 2024

AI agent for therapists that writes clinical notes, treatment plans, and insurance claims automatically.

Raised
$125K
Stage
Pre-S
45

Stilta

US

Agentic AI for high-stakes patent work, enabling rapid invalidity, infringement, and FTO analyses across vast data sources.

Raised
$10.5M
Stage
Seed
41

CrushOn AI

CY est. 2025

Experience unfiltered, spicy AI character chat with no content restrictions.

38

ELYZA

JP est. 2020

ELYZA is an AI company focused on Deep Learning, developing proprietary large language models and supporting major corporations in their LLM adoption.

35

Khanmigo

Verified
US est. 2023

Your AI guide for learning anything

Stage
NON-PROFIT
32

Mainframe

est. 2026

Building interfaces for the future where operating systems are built around actions, not apps, powered by AI.

32

Superhuman

US est. 2014

The fastest email experience ever made, with AI triage and reply.

32

Shortwave

US est. 2020

AI-native email built on Gmail with bundles, AI search, and chat.

32

TopView AI

US est. 2023

Viral video generator from any script or product link

32