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Newest on the Built 100

Fresh entrants, most recently added through operator submissions and editorial research.

#
Company
This week
1
Thinking Machines Lab
Frontier models for multi-step agentic reasoning
AI·Series B·San Francisco, California
▲ 61Peak #19 · 1 wk
2
Supabase
Open-source Postgres backend, auth, storage
Dev Tools·Series D·Midland, Texas
▲ 4Peak #21 · 1 wk
3
Abridge
Ambient AI clinical documentation for clinicians
Healthtech·Series E·San Francisco, California
▲ 13Peak #22 · 1 wk
4
Suno
AI music generation from text prompts
Consumer·Series D·Cambridge, Massachusetts
–Peak #27 · 1 wk
5
Pacaso
Marketplace for fractional luxury-home co-ownership
Consumer·Late-stage·San Francisco, California
▲ 73Peak #28 · 1 wk
6
Heirloom Carbon
Direct air capture using limestone mineralization
Climate & Energy·Series B·San Francisco, California
▲ 35Peak #56 · 1 wk
7
Cartesia
Ultra-fast voice AI on state-space models
AI·Series B·San Francisco, California
▼ 16Peak #48 · 1 wk
8
StockX
Resale marketplace for sneakers, apparel, collectibles
Consumer·Late-stage·Detroit, Michigan
▼ 56Peak #33 · 1 wk
9
Sublime Systems
Low-carbon cement via electrochemical production
Climate & Energy·Series B·Somerville, Massachusetts
▼ 35Peak #57 · 1 wk
10
Series
AI social network inside iMessage
Consumer·Seed·Carteret, New Jersey
▲ 41Peak #95 · 1 wk
11
Pika
AI video generation platform for creators
Consumer·Series A·Palo Alto, California
▲ 4Peak #109 · 1 wk
12
Turbopuffer
Serverless vector search on object storage
Dev Tools·Seed·New York, New York
▲ 15Peak #115 · 1 wk
13
Rye
Universal agentic checkout API for commerce
Consumer·Seed·Olympic Valley, California
▼ 11Peak #114 · 1 wk
14
Yuka
Barcode app rating food and cosmetics health
Consumer·Late-stage·Paris, Ile-de-France
▼ 37Peak #95 · 1 wk
15
Anthropic#1 in AI
Builds Claude frontier models and AI assistant
AI·Late-stage·Cambridge, Massachusetts
▲ 1Peak #1 · 2 wks
16
Commure#1 in Healthtech
AI revenue-cycle and clinical ops platform
Healthtech·Late-stage·Mountain View, California
▲ 28Peak #8 · 2 wks
17
Sword Health
AI-powered virtual physical therapy and pain care
Healthtech·Series E·New York, New York
▼ 19Peak #27 · 2 wks
18
Relyance AI
AI-powered data governance and privacy mapping
Dev Tools·Series B·San Francisco, California
▼ 3Peak #91 · 2 wks
19
Databricks#1 in Dev Tools
Data lakehouse and AI/ML analytics platform
Dev Tools·Late-stage·San Francisco, California
▲ 2Peak #3 · 3 wks
20
Bilt
Rewards and loyalty on rent and housing payments
Fintech·Late-stage·New York, New York
▼ 3Peak #52 · 3 wks
21
Form Energy
100-hour iron-air long-duration grid batteries
Climate & Energy·Late-stage·Somerville, Massachusetts
▲ 18Peak #71 · 3 wks
22
Captions
AI video-editing app for creators
Consumer·Series C·New York, New York
▼ 20Peak #97 · 3 wks
23
Partiful
Gen-Z event invitations and party-planning app
Consumer·Series A·New York, New York
▼ 14Peak #112 · 3 wks
24
TeamFeedEditors' Choice
A workplace OS where companies hire AI teammates
SaaS / B2B·Seed·Austin, TX
▼ 78Peak #50 · 3 wks
25
Crusoe#1 in Climate & Energy
Energy-first AI data-center infrastructure
Climate & Energy·Late-stage·Denver, Colorado
▲ 8Peak #9 · 4 wks
26
Omni
Cloud BI blending governance and self-serve analytics
Dev Tools·Series B·San Francisco, California
▲ 35Peak #37 · 4 wks
27
Decagon
AI customer-support agents for enterprises
AI·Series C·San Francisco, California
▲ 5Peak #40 · 4 wks
28
Substack
Subscription newsletter and creator publishing
Consumer·Late-stage·San Francisco, California
▼ 14Peak #40 · 4 wks
29
Fivetran
Automated data movement plus dbt transformation
Dev Tools·Late-stage·Oakland, California
▼ 34Peak #26 · 4 wks
30
Plaid
Bank-account data connectivity for fintech apps
Fintech·Late-stage·San Francisco, California
▼ 95Peak #15 · 4 wks
31
Slingshot AI
Ash, an AI built for therapy
Healthtech·Series A·New York, NY
▼ 14Peak #115 · 4 wks
32
Chainguard
Secure container images and supply-chain security
Dev Tools·Series D·Kirkland, Washington
▲ 47Peak #41 · 5 wks
33
Aalo Atomics
Modular nuclear microreactors for data centers
Climate & Energy·Series B·Dickinson, Texas
▼ 6Peak #52 · 5 wks
34
Descript
AI-powered audio and video editing platform
Consumer·Series C·San Francisco, California
▼ 29Peak #82 · 5 wks
35
Archive
Branded resale storefronts for apparel brands
Consumer·Series B·New York, New York
▼ 64Peak #58 · 5 wks
36
Persona
Identity verification and fraud-prevention platform
Cybersecurity·Series D·San Francisco, California
▲ 3Peak #70 · 6 wks
37
Maven AGI
Enterprise AI agents for customer support
SaaS / B2B·Series B·Boston, Massachusetts
▼ 26Peak #71 · 6 wks
38
Harmonic Security
Zero-touch data protection for the AI workforce
Cybersecurity·Series A·San Francisco, California
▲ 11Peak #118 · 6 wks
39
Definity
AI agents that build and manage data pipelines
Dev Tools·Series A·Tel Aviv, Israel
▲ 5Peak #117 · 6 wks
40
Cribl
Data pipeline platform for observability and security
SaaS / B2B·Late-stage·San Francisco, California
▼ 76Peak #14 · 7 wks
41
Quill AI
AI analyst automating financial research
Dev Tools·Seed·New York, New York
▼ 25Peak #111 · 7 wks
42
xAI
Builds Grok foundation models, integrated with X
AI·Late-stage·Palo Alto, California
–Peak #2 · 8 wks
43
Flexport
Tech-driven global freight and logistics platform
Consumer·Late-stage·San Francisco, California
▲ 9Peak #29 · 8 wks
44
Fomo
Social crypto-trading app
Consumer·Series B·New York, New York
▼ 53Peak #56 · 8 wks
45
Polymarket
Crypto-based prediction market for real-world events
Fintech·Late-stage·New York, New York
▲ 64Peak #30 · 9 wks
46
ElevenLabs
AI voice generation and audio tools
Consumer·Late-stage·London, England
▼ 27Peak #11 · 9 wks
47
Cloaked
Consumer privacy app generating disposable identities
Cybersecurity·Series B·New York, New York
▲ 4Peak #49 · 9 wks
48
Faire
Wholesale marketplace connecting retailers with brands
Consumer·Late-stage·San Francisco, California
▼ 62Peak #8 · 9 wks
49
Tabs
AI revenue recognition and billing automation
Fintech·Series B·New York, New York
▼ 4Peak #55 · 9 wks
50
Cluely
Real-time on-screen AI assistant for calls
Consumer·Seed·New York, New York
▲ 14Peak #103 · 9 wks
51
Beehiiv
Newsletter platform with built-in growth and ads
Consumer·Series A·New York, New York
▼ 53Peak #59 · 9 wks
52
Ghost
B2B marketplace for surplus brand inventory
Consumer·Series C·Phoenix, Arizona
▼ 79Peak #53 · 9 wks
53
Quince#1 in Consumer
Direct-from-factory affordable premium goods
Consumer·Late-stage·San Francisco, California
▲ 74Peak #12 · 10 wks
54
Commonwealth Fusion Systems
Building compact tokamak fusion power plants
Climate & Energy·Late-stage·Devens, Massachusetts
▼ 4Peak #30 · 10 wks
55
OpenEvidence
AI medical knowledge assistant for physicians
Healthtech·Series D·Miami, Florida
▼ 3Peak #48 · 10 wks
56
ClayEditors' Choice
GTM data enrichment and sales automation platform
SaaS / B2B·Series B·New York, New York
▼ 44Peak #23 · 10 wks
57
Tennr
AI automating patient referrals and intake
Healthtech·Series C·New York, New York
▼ 4Peak #78 · 10 wks
58
Greptile
AI code review that understands whole codebases
Dev Tools·Series A·San Francisco, California
▲ 35Peak #99 · 10 wks
59
Puzzle
AI-native accounting software built for startups
Fintech·Series B·Wilmington, Delaware
▼ 44Peak #73 · 10 wks
60
Cyera#1 in Cybersecurity
AI-driven data security posture management
Cybersecurity·Late-stage·New York, New York
▲ 30Peak #7 · 11 wks
61
Mercury#1 in Fintech
Business banking platform for startups and SMBs
Fintech·Late-stage·San Francisco, California
▲ 6Peak #13 · 11 wks
62
Mercor
AI marketplace matching expert talent to labs
AI·Series C·San Francisco, California
▲ 16Peak #23 · 11 wks
63
Genspark
AI super-agent for research and tasks
Consumer·Series B·Palo Alto, California
▲ 48Peak #50 · 11 wks
64
Glean
Enterprise AI search and work assistant
SaaS / B2B·Series F·Palo Alto, California
▼ 27Peak #26 · 11 wks
65
Kalshi
Regulated event-contract prediction market exchange
Fintech·Series E·New York, New York
▲ 56Peak #14 · 12 wks
66
Hightouch
Data-activation and agentic marketing platform
SaaS / B2B·Series C·San Francisco, California
▲ 57Peak #42 · 12 wks
67
Base Power
Home battery backup and distributed grid power
Climate & Energy·Late-stage·Austin, Texas
▲ 45Peak #51 · 12 wks
68
Semgrep
Static code analysis and application security
Cybersecurity·Series D·San Francisco, California
▼ 30Peak #61 · 12 wks
69
Karat Financial
Credit cards and banking for creators
Consumer·Series B·West Hollywood, California
▼ 65Peak #49 · 12 wks
70
Function Health
Direct-to-consumer comprehensive lab-testing membership
Healthtech·Series B·New York, New York
▼ 29Peak #75 · 12 wks
71
Deel#1 in SaaS / B2B
Global payroll and contractor compliance platform
SaaS / B2B·Late-stage·San Francisco, California
▲ 7Peak #15 · 13 wks
72
Synthesia
AI avatar video generation for businesses
Consumer·Late-stage·London, England
▼ 15Peak #24 · 13 wks
73
Whatnot
Live-shopping marketplace for collectibles and resale
Consumer·Late-stage·Marina del Rey, California
▼ 17Peak #15 · 13 wks
74
Ambience Healthcare
Ambient AI documentation and medical coding
Healthtech·Series C·San Francisco, California
▲ 31Peak #72 · 13 wks
75
Hex
Collaborative AI-powered data analytics notebooks
Dev Tools·Series C·San Francisco, California
▼ 14Peak #64 · 13 wks
76
Sierra
Conversational AI agents for customer experience
AI·Late-stage·San Francisco, California
▲ 22Peak #10 · 14 wks
77
Lila Sciences
AI for autonomous scientific labs
Healthtech·Series A·Cambridge, Massachusetts
▲ 57Peak #63 · 14 wks
78
7AI
Agentic AI security operations for SOC teams
Cybersecurity·Series A·Boston, Massachusetts
▲ 55Peak #68 · 14 wks
79
monday.com
Work-OS platform for projects and workflows
SaaS / B2B·Public·Tel Aviv-Yafo, Tel Aviv District
▼ 72Peak #34 · 14 wks
80
Sigma Computing
Spreadsheet-style cloud BI on the warehouse
Dev Tools·Late-stage·San Francisco, California
▲ 96Peak #11 · 15 wks
81
Cursor (Anysphere)Editors' Choice
AI-native code editor with agent mode
Dev Tools·Series D·San Francisco, California
▼ 24Peak #7 · 15 wks
82
Rippling
Unified HR, IT, and finance employee platform
SaaS / B2B·Late-stage·San Francisco, California
▼ 15Peak #20 · 15 wks
83
Replit
Browser IDE and AI app builder
Dev Tools·Late-stage·Foster City, California
▲ 37Peak #39 · 15 wks
84
Notion
All-in-one workspace: docs, wikis, projects
SaaS / B2B·Late-stage·San Francisco, California
▼ 47Peak #12 · 15 wks
85
Twelve
Converts captured CO2 into jet fuel
Climate & Energy·Series C·San Francisco, California
▼ 31Peak #50 · 15 wks
86
WisdomAI
Natural-language BI agent over enterprise data
Dev Tools·Series A·San Mateo, CA
▲ 7Peak #124 · 15 wks
87
Runway
Generative AI video creation models
Consumer·Late-stage·New York, New York
▼ 8Peak #16 · 16 wks
88
Perplexity
AI-powered conversational answer engine
Consumer·Late-stage·San Francisco, California
▼ 41Peak #6 · 16 wks
89
Terra CO2
Low-carbon cement replacement for concrete
Climate & Energy·Series B·Golden, Colorado
▲ 19Peak #60 · 16 wks
90
Pylon
AI-powered B2B customer support platform
SaaS / B2B·Series B·San Francisco, California
▼ 40Peak #56 · 16 wks
91
CognitionEditors' Choice
Devin, the autonomous AI software engineer
AI·Series D·San Francisco, California
▼ 8Peak #6 · 17 wks
92
Fervo Energy
Enhanced geothermal developer for firm clean power
Climate & Energy·Series E·Houston, Texas
▲ 51Peak #32 · 17 wks
93
Vercel
Frontend cloud and deployment platform
Dev Tools·Late-stage·San Francisco, California
▼ 35Peak #13 · 17 wks
94
Passes
Fan subscription and monetization for creators
Consumer·Series A·Miami, Florida
▲ 16Peak #116 · 17 wks
95
Lovable
AI app builder turning prompts into full apps
AI·Series B·Stockholm, Stockholm County
▼ 5Peak #21 · 18 wks
96
osapiens
Enterprise compliance and process-automation software
SaaS / B2B·Series C·Mannheim, Baden-Wuerttemberg
▼ 3Peak #51 · 18 wks
97
MotherDuck
Serverless DuckDB-based cloud analytics warehouse
Dev Tools·Series B·Seattle, Washington
▼ 14Peak #79 · 18 wks
98
Tabby
Buy-now-pay-later leader across the Middle East
Fintech·Late-stage·Riyadh, Riyadh Province
▲ 1Peak #14 · 19 wks
99
Modal
Serverless GPU compute for AI workloads
Dev Tools·Series B·New York, New York
▲ 48Peak #44 · 19 wks
100
Granola
AI meeting notetaker and team context tool
Consumer·Series C·London
▼ 9Peak #51 · 19 wks