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Trending this week

The companies generating the most momentum right now — climbing the Built 100 fastest. Refreshed weekly.

#
Company
This week
1
OpenAI#1 in AI
Builds ChatGPT and GPT frontier foundation models
AI·Late-stage·San Francisco, California
–Peak #1 · 25 wks
2
Anthropic
Builds Claude frontier models and AI assistant
AI·Late-stage·Cambridge, Massachusetts
–Peak #1 · 2 wks
3
xAI
Builds Grok foundation models, integrated with X
AI·Late-stage·Palo Alto, California
▲ 1Peak #2 · 8 wks
4
Databricks#1 in Dev Tools
Data lakehouse and AI/ML analytics platform
Dev Tools·Late-stage·San Francisco, California
▲ 1Peak #3 · 3 wks
5
Stripe#1 in Fintech
Payments infrastructure and APIs for businesses
Fintech·Late-stage·South San Francisco, California
▼ 2Peak #1 · 21 wks
6
Ramp
Corporate cards and spend-management automation
Fintech·Late-stage·New York, New York
▲ 4Peak #4 · 21 wks
7
Cyera#1 in Cybersecurity
AI-driven data security posture management
Cybersecurity·Late-stage·New York, New York
▲ 30Peak #7 · 11 wks
8
Commure#1 in Healthtech
AI revenue-cycle and clinical ops platform
Healthtech·Late-stage·Mountain View, California
▲ 28Peak #8 · 2 wks
9
Crusoe#1 in Climate & Energy
Energy-first AI data-center infrastructure
Climate & Energy·Late-stage·Denver, Colorado
▲ 8Peak #9 · 4 wks
10
Sigma Computing
Spreadsheet-style cloud BI on the warehouse
Dev Tools·Late-stage·San Francisco, California
▲ 97Peak #10 · 15 wks
11
Sierra
Conversational AI agents for customer experience
AI·Late-stage·San Francisco, California
▲ 21Peak #10 · 14 wks
12
Baseten
AI model inference and deployment infrastructure
Dev Tools·Late-stage·San Francisco, California
▲ 32Peak #12 · 24 wks
13
Wiz
Agentless cloud security and risk platform
Cybersecurity·Late-stage·New York, New York
▼ 4Peak #9 · 22 wks
14
CognitionEditors' Choice
Devin, the autonomous AI software engineer
AI·Series D·San Francisco, California
▼ 6Peak #6 · 17 wks
15
Deel#1 in SaaS / B2B
Global payroll and contractor compliance platform
SaaS / B2B·Late-stage·San Francisco, California
▲ 7Peak #15 · 13 wks
16
TeamFeedEditors' Choice
A workplace OS where companies hire AI teammates, not just tools
SaaS / B2B·Seed·Austin, TX
NEWPeak #16 · 1 wk
17
Kalshi
Regulated event-contract prediction market exchange
Fintech·Series E·New York, New York
▲ 53Peak #14 · 12 wks
18
Mercury
Business banking platform for startups and SMBs
Fintech·Late-stage·San Francisco, California
▲ 1Peak #13 · 11 wks
19
Quince#1 in Consumer
Direct-from-factory affordable premium goods
Consumer·Late-stage·San Francisco, California
▲ 67Peak #12 · 10 wks
20
Tabby
Buy-now-pay-later leader across the Middle East
Fintech·Late-stage·Riyadh, Riyadh Province
▲ 1Peak #14 · 19 wks
21
Thinking Machines Lab
Frontier models for multi-step agentic reasoning
AI·Series B·San Francisco, California
▲ 59Peak #19 · 1 wk
22
Harness
AI-powered CI/CD and software-delivery platform
Dev Tools·Late-stage·San Francisco, California
▲ 2Peak #22 · 24 wks
23
WHOOP
Wearable band for fitness and health tracking
Healthtech·Late-stage·Boston, Massachusetts
▲ 17Peak #23 · 20 wks
24
Runway
Generative AI video creation models
Consumer·Late-stage·New York, New York
▼ 8Peak #16 · 16 wks
25
Mercor
AI marketplace matching expert talent to labs
AI·Series C·San Francisco, California
▲ 14Peak #23 · 11 wks
26
Supabase
Open-source Postgres backend, auth, storage
Dev Tools·Series D·Midland, Texas
▼ 1Peak #21 · 1 wk
27
Abridge
Ambient AI clinical documentation for clinicians
Healthtech·Series E·San Francisco, California
▲ 8Peak #22 · 1 wk
28
ClickHouse
Open-source columnar DB for real-time analytics
Dev Tools·Late-stage·Palo Alto, California
▲ 40Peak #28 · 20 wks
29
Fervo Energy
Enhanced geothermal developer for firm clean power
Climate & Energy·Series E·Houston, Texas
▲ 54Peak #29 · 17 wks
30
Cursor (Anysphere)Editors' Choice
AI-native code editor with agent mode
Dev Tools·Series D·San Francisco, California
▼ 23Peak #7 · 15 wks
31
Polymarket
Crypto-based prediction market for real-world events
Fintech·Late-stage·New York, New York
▲ 63Peak #30 · 9 wks
32
Flexport
Tech-driven global freight and logistics platform
Consumer·Late-stage·San Francisco, California
▲ 6Peak #29 · 8 wks
33
Suno
AI music generation from text prompts
Consumer·Series D·Cambridge, Massachusetts
▼ 6Peak #27 · 1 wk
34
Pacaso
Marketplace for fractional luxury-home co-ownership
Consumer·Late-stage·San Francisco, California
▲ 67Peak #28 · 1 wk
35
Lovable
AI app builder turning prompts into full apps
AI·Series B·Stockholm, Stockholm County
▼ 4Peak #21 · 18 wks
36
Rippling
Unified HR, IT, and finance employee platform
SaaS / B2B·Late-stage·San Francisco, California
▼ 16Peak #20 · 15 wks
37
Commonwealth Fusion Systems
Building compact tokamak fusion power plants
Climate & Energy·Late-stage·Devens, Massachusetts
▼ 7Peak #30 · 10 wks
38
Replit
Browser IDE and AI app builder
Dev Tools·Late-stage·Foster City, California
▲ 38Peak #38 · 15 wks
39
ElevenLabs
AI voice generation and audio tools
Consumer·Late-stage·London, England
▼ 28Peak #11 · 9 wks
40
Omni
Cloud BI blending governance and self-serve analytics
Dev Tools·Series B·San Francisco, California
▲ 32Peak #37 · 4 wks
41
Antora Energy
Thermal batteries storing energy for industrial heat
Climate & Energy·Series B·San Jose, California
▲ 46Peak #41 · 22 wks
42
Modal
Serverless GPU compute for AI workloads
Dev Tools·Series B·New York, New York
▲ 50Peak #42 · 19 wks
43
Synthesia
AI avatar video generation for businesses
Consumer·Late-stage·London, England
▼ 15Peak #24 · 13 wks
44
Hightouch
Data-activation and agentic marketing platform
SaaS / B2B·Series C·San Francisco, California
▲ 55Peak #42 · 12 wks
45
Chainguard
Secure container images and supply-chain security
Dev Tools·Series D·Kirkland, Washington
▲ 43Peak #41 · 5 wks
46
Decagon
AI customer-support agents for enterprises
AI·Series C·San Francisco, California
▼ 1Peak #40 · 4 wks
47
Whatnot
Live-shopping marketplace for collectibles and resale
Consumer·Late-stage·Marina del Rey, California
▼ 18Peak #15 · 13 wks
48
Vercel
Frontend cloud and deployment platform
Dev Tools·Late-stage·San Francisco, California
▼ 35Peak #13 · 17 wks
49
Perplexity
AI-powered conversational answer engine
Consumer·Late-stage·San Francisco, California
▼ 43Peak #6 · 16 wks
50
Base Power
Home battery backup and distributed grid power
Climate & Energy·Late-stage·Austin, Texas
▲ 46Peak #50 · 12 wks
51
Genspark
AI super-agent for research and tasks
Consumer·Series B·Palo Alto, California
▲ 47Peak #50 · 11 wks
52
Cloaked
Consumer privacy app generating disposable identities
Cybersecurity·Series B·New York, New York
▲ 1Peak #49 · 9 wks
53
Windsurf
AI coding agent and IDE for developers
Dev Tools·Late-stage·Mountain View, California
▲ 14Peak #53 · 24 wks
54
osapiens
Enterprise compliance and process-automation software
SaaS / B2B·Series C·Mannheim, Baden-Wuerttemberg
▼ 3Peak #51 · 18 wks
55
Glean
Enterprise AI search and work assistant
SaaS / B2B·Series F·Palo Alto, California
▼ 29Peak #26 · 11 wks
56
OpenEvidence
AI medical knowledge assistant for physicians
Healthtech·Series D·Miami, Florida
▼ 7Peak #48 · 10 wks
57
Hippocratic AI
Safety-focused generative AI healthcare phone agents
Healthtech·Series C·Palo Alto, California
▲ 43Peak #57 · 24 wks
58
Oasis Security
Governance platform for non-human identities
Cybersecurity·Series B·New York, New York
▲ 52Peak #58 · 23 wks
59
Terra CO2
Low-carbon cement replacement for concrete
Climate & Energy·Series B·Golden, Colorado
▲ 20Peak #59 · 16 wks
60
Notion
All-in-one workspace: docs, wikis, projects
SaaS / B2B·Late-stage·San Francisco, California
▼ 48Peak #12 · 15 wks
61
Aalo Atomics
Modular nuclear microreactors for data centers
Climate & Energy·Series B·Dickinson, Texas
▼ 9Peak #52 · 5 wks
62
Substack
Subscription newsletter and creator publishing
Consumer·Late-stage·San Francisco, California
▼ 19Peak #40 · 4 wks
63
Heirloom Carbon
Direct air capture using limestone mineralization
Climate & Energy·Series B·San Francisco, California
▲ 28Peak #56 · 1 wk
64
Lila Sciences
AI for autonomous scientific labs
Healthtech·Series A·Cambridge, Massachusetts
▲ 56Peak #63 · 14 wks
65
Bilt
Rewards and loyalty on rent and housing payments
Fintech·Late-stage·New York, New York
▼ 2Peak #52 · 3 wks
66
Sword Health
AI-powered virtual physical therapy and pain care
Healthtech·Series E·New York, New York
▼ 20Peak #27 · 2 wks
67
Cartesia
Ultra-fast voice AI on state-space models
AI·Series B·San Francisco, California
▼ 19Peak #48 · 1 wk
68
Granola
AI meeting notetaker and team context tool
Consumer·Series C·London
▼ 8Peak #51 · 19 wks
69
7AI
Agentic AI security operations for SOC teams
Cybersecurity·Series A·Boston, Massachusetts
▲ 54Peak #68 · 14 wks
70
ClayEditors' Choice
GTM data enrichment and sales automation platform
SaaS / B2B·Series B·New York, New York
▼ 47Peak #23 · 10 wks
71
Persona
Identity verification and fraud-prevention platform
Cybersecurity·Series D·San Francisco, California
▲ 2Peak #70 · 6 wks
72
Higgsfield AI
AI video generator for social marketers
Consumer·Series A·San Francisco, California
▲ 53Peak #72 · 23 wks
73
Ambience Healthcare
Ambient AI documentation and medical coding
Healthtech·Series C·San Francisco, California
▲ 30Peak #72 · 13 wks
74
Form Energy
100-hour iron-air long-duration grid batteries
Climate & Energy·Late-stage·Somerville, Massachusetts
▲ 15Peak #71 · 3 wks
75
Geordie AI
Securing and governing enterprise AI agents
Cybersecurity·Series A·London, England
▲ 34Peak #74 · 24 wks
76
Doctronic
AI doctor app for instant consults
Healthtech·Series B·New York, New York
▼ 12Peak #54 · 22 wks
77
Tailscale
WireGuard-based zero-trust mesh VPN networking
Cybersecurity·Series C·Toronto, Ontario
▼ 30Peak #47 · 19 wks
78
Mill
Smart bin turning food scraps into feed
Climate & Energy·Late-stage·San Bruno, California
▲ 7Peak #59 · 19 wks
79
Prophet Security
Agentic AI for autonomous alert triage
Cybersecurity·Series A·Menlo Park, California
▲ 54Peak #78 · 19 wks
80
Fivetran
Automated data movement plus dbt transformation
Dev Tools·Late-stage·Oakland, California
▼ 39Peak #26 · 4 wks
81
Attio
AI-native, flexible CRM for modern teams
SaaS / B2B·Series B·London, England
▲ 23Peak #81 · 23 wks
82
Hex
Collaborative AI-powered data analytics notebooks
Dev Tools·Series C·San Francisco, California
▼ 13Peak #64 · 13 wks
83
Tennr
AI automating patient referrals and intake
Healthtech·Series C·New York, New York
▼ 5Peak #78 · 10 wks
84
Faire
Wholesale marketplace connecting retailers with brands
Consumer·Late-stage·San Francisco, California
▼ 66Peak #8 · 9 wks
85
Tabs
AI revenue recognition and billing automation
Fintech·Series B·New York, New York
▼ 8Peak #55 · 9 wks
86
Descope
Drop-in authentication and user management
Cybersecurity·Seed·Los Altos, California
▲ 38Peak #86 · 25 wks
87
Gamma
AI presentation maker challenging PowerPoint
SaaS / B2B·Series B·San Francisco, California
▼ 45Peak #41 · 24 wks
88
Rain
Stablecoin card-issuing and payments infrastructure
Fintech·Series C·New York, New York
▼ 23Peak #65 · 22 wks
89
Numeral
Automated sales-tax compliance for online businesses
Fintech·Series A·San Francisco, California
▲ 37Peak #85 · 19 wks
90
Semgrep
Static code analysis and application security
Cybersecurity·Series D·San Francisco, California
▼ 29Peak #61 · 12 wks
91
Cribl
Data pipeline platform for observability and security
SaaS / B2B·Late-stage·San Francisco, California
▼ 77Peak #14 · 7 wks
92
StockX
Resale marketplace for sneakers, apparel, collectibles
Consumer·Late-stage·Detroit, Michigan
▼ 59Peak #33 · 1 wk
93
Amperos Health
AI-native medical billing denial management
Healthtech·Series A·New York, New York
▲ 34Peak #93 · 19 wks
94
Twelve
Converts captured CO2 into jet fuel
Climate & Energy·Series C·San Francisco, California
▼ 32Peak #50 · 15 wks
95
Sublime Systems
Low-carbon cement via electrochemical production
Climate & Energy·Series B·Somerville, Massachusetts
▼ 38Peak #57 · 1 wk
96
Pylon
AI-powered B2B customer support platform
SaaS / B2B·Series B·San Francisco, California
▼ 40Peak #56 · 16 wks
97
Series
AI social network inside iMessage
Consumer·Seed·Carteret, New Jersey
▲ 39Peak #95 · 1 wk
98
Maven AGI
Enterprise AI agents for customer support
SaaS / B2B·Series B·Boston, Massachusetts
▼ 27Peak #71 · 6 wks
99
Zed
High-performance open-source AI code editor
Dev Tools·Series B·Evesham Township, New Jersey
▲ 9Peak #80 · 22 wks
100
Pomelo
Neobank and remittances for immigrant families
Fintech·Series B·Washington, District of Columbia
▼ 26Peak #72 · 23 wks