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HOME/THEMES/AI TRAINING DATA PLATFORMS
// THEME

AI Training Data Platforms

Platforms and marketplaces that collect, curate, and supply high-quality human-generated or synthetic data specifically for training and evaluating AI/ML models.

COMPANIES 106VELOCITY — STABLECAPITAL 28D $17105.8M · 48 DEALS
TOP INVESTORS: nvidia (54) · a16z (51) · y combinator (22) · general catalyst (11) · sequoia (11)

CAPITAL FIGURES ARE MEDIA-EXTRACTED ESTIMATES, NOT VERIFIED FILINGS.

Mega-rounds dominate; weekly capital remains volatile
◀ $21.1B · wk of 08-102026-07-13 ── 2026-10-12 · WEEKLY
Unknown-stage deals dwarf all others by dollar volume
unknown
$78.9B · 80 DEALS
series a
$12.2B · 43 DEALS
seed
$11.9B · 26 DEALS
series b
$3.9B · 24 DEALS
series c
$7.2B · 15 DEALS
Mention momentum
MENTIONS / WEEK · PEAK 426

EXTRACTED FROM 25+ PODCASTS & VC NEWSLETTERS · MEDIA-REPORTED FIGURES, NOT VERIFIED FILINGS

// THE LEAD
▲ NEW

Hyperscaler M&A consolidates training data supply chains

Meta's reported $18B acquisition of Scale AI — the dominant data annotation and infrastructure platform — marks the most consequential structural shift in the AI training data market to date. By internalizing Scale AI's annotation pipeline (and its Surge product targeting frontier model training), Meta follows a vertical integration playbook that locks competitors out of a critical supply chain node. This move also puts pressure on Turing, Mercor, and other data services players who counted on neutrality to serve multiple frontier labs. With Anthropic reportedly spending over $1B/year on training environments and Nvidia anchoring a $130M growth round in an open marketplace for AI training environments, the battle for data infrastructure control is intensifying across both proprietary and open channels.

CORROBORATED · 2 SOURCE TYPESMy First Million · Sep 30 →The AI Corner · Sep 30Sourcery · Sep 30 →
// TRENDS
▲ STRENGTHENINGPhysical and multimodal data scarcity deepens as robotics scales

Demand for real-world physical training data continues to intensify as robotics and physical AI companies scale. Human Archive — backed by Wing Venture Capital, NVP Capital, and Y Combinator — deploys gig workers in India wearing camera caps, tactile gloves, and motion-capture suits to capture first-person multimodal sensor data sold directly to robotics labs. Protege AI and Luel similarly target the gap between synthetic and real-world data fidelity. The $145M Series C anchored by Nvidia and Intel Capital (signal [0]) underscores that infrastructure investors view physical data collection as a critical, capital-intensive bottleneck.

Why it matters · Physical data collection is becoming a dedicated industry vertical — companies that own proprietary real-world data pipelines will hold durable moats as simulation-to-reality gaps persist.

CORROBORATED · 2 SOURCE TYPESStrictlyVC · Oct 1arXiv Physical AI · Oct 1 →The AI Corner · Sep 30
▲ STRENGTHENINGLive workflow capture becomes mainstream training data source

A cohort of startups — including Empromptu AI, Screencap, and Annotate — is productizing the capture of real human workflows (screen recordings, voice corrections, interaction logs) as structured training data for fine-tuning. Empromptu AI explicitly captures live AI workflow corrections to produce custom fine-tuned models. Shofo's 25M+ video clip platform and LMArena's living human preference dataset represent the same convergence: training data is increasingly harvested from active usage rather than purpose-built annotation campaigns.

Why it matters · Operators who embed workflow capture into their products will generate compounding, proprietary training assets — a structural advantage that pure annotation vendors cannot replicate.

CORROBORATED · 2 SOURCE TYPESSourcery · Sep 30 →The AI Corner · Sep 30My First Million · Sep 30 →
▲ STRENGTHENINGHuman preference and evaluation data commands premium valuation

LMArena — the largest living dataset of human preferences on AI outputs — and Mercor, an AI-powered talent network and data provider to frontier labs, represent a category where strategic value is decoupling from revenue. Turing's sponsorship positioning as a provider of 'AI training data and reinforcement learning environments for NVIDIA, Anthropic, Salesforce, Gemini' (signal [18]) confirms that RLHF-grade human preference data is now a recurring enterprise procurement line item, not a one-time project cost. The $130M Nvidia-backed growth round for an open marketplace for AI training environments (signal [19]) at a $1B valuation further validates premium pricing for curated evaluation infrastructure.

Why it matters · Human preference data is becoming a recurring revenue category — platforms that can deliver consistent, high-quality preference signal at scale will attract both strategic acquirers and long-duration venture capital.

CORROBORATED · 2 SOURCE TYPESSourcery · Sep 30 →The AI Corner · Sep 30My First Million · Sep 30 →
▲ STRENGTHENINGDecentralized provenance layers gain traction amid IP risk surge

Poseidon's decentralized AI data layer — built on Story Protocol with blockchain smart contracts for traceable, legally licensed training data — is gaining relevance as regulatory and legal scrutiny of training data provenance intensifies. Sureel AI's content provenance tools for music and creative elements address the same IP risk vector. The FTC's open investigation into frontier AI labs (signal [9]) and Amazon's smart glasses data-capture controversy (signal [12]) are accelerating enterprise demand for auditable data lineage — a market where the GPIC permissive image corpus (co-released by Radical Numerics and University of Michigan) and CZI's Cell by Gene platform offer early templates.

Why it matters · As regulatory exposure around training data sourcing rises, provenance-tracked and licensed data platforms shift from niche to compliance necessity — early movers will define the audit standard.

StrictlyVC · Oct 1Axios AI+ · Sep 30
// COMPANIES
106 COMPANIES
01
Anthropic
anthropic.com
IPO · OCT 15
1673 SIGNALS · LAST SEEN OCT 15, 2026
02
a16z
a16z.com
$10M · SEED · A16Z · OCT 15
240 SIGNALS · LAST SEEN OCT 15, 2026
03
Y Combinator
ycombinator.com
139 SIGNALS · LAST SEEN OCT 15, 2026
04
Stord
stord.com
$400M · CITI IMPACT FUND + MORGAN STANLEY · OCT 14
27 SIGNALS · LAST SEEN OCT 14, 2026
05
Mecka
mecka.ai
$60M · SEQUOIA CAPITAL · OCT 14
13 SIGNALS · LAST SEEN OCT 14, 2026
06
Harvey
harvey.ai
$1.5B · GROWTH · SEQUOIA + KLEINER PERKINS · OCT 14
135 SIGNALS · LAST SEEN OCT 14, 2026
07
OpenAI
openai.com
GROWTH · OCT 13
1594 SIGNALS · LAST SEEN OCT 15, 2026
08
Jev
$870M · GROWTH · A16Z + DCVC · OCT 13
14 SIGNALS · LAST SEEN OCT 13, 2026
09
Nvidia
nvidia.com
GROWTH · NVIDIA · OCT 12
956 SIGNALS · LAST SEEN OCT 14, 2026
10
Salesforce
salesforce.com
$12M · SERIES A · AFLAC + ALL STAR SAAS FUND · OCT 12
165 SIGNALS · LAST SEEN OCT 13, 2026
11
Scale AI
scale.com
$42M · SERIES B · SCALE + NEA · OCT 11
45 SIGNALS · LAST SEEN OCT 12, 2026
12
Tencent
tencent.com
$12.0B · GROWTH · TENCENT + CONTEMPORARY AMPEREX TECHNOLOGY CO. · OCT 9
66 SIGNALS · LAST SEEN OCT 15, 2026
13
Meta
meta.com
$500M · GROWTH · TENCENT · OCT 9
501 SIGNALS · LAST SEEN OCT 14, 2026
14
Stanford University
stanford.edu
GRANT · SAMSUNG · OCT 9
105 SIGNALS · LAST SEEN OCT 9, 2026
15
Microsoft
microsoft.com
$60M · SERIES B · SEQUOIA CAPITAL + NVIDIA · OCT 8
328 SIGNALS · LAST SEEN OCT 14, 2026
16
Halluminate
$30M · SERIES A · OAK HC/FT · OCT 5
6 SIGNALS · LAST SEEN OCT 5, 2026
17
Mind Robotics
mindrobotics.ai
SEED · ANDREESSEN HOROWITZ · OCT 4
16 SIGNALS · LAST SEEN OCT 4, 2026
18
Turing
turing.com
$111M · SERIES E · OCT 2
16 SIGNALS · LAST SEEN OCT 12, 2026
19
Project Prometheus
$6.2B · SEED · OCT 2
30 SIGNALS · LAST SEEN OCT 2, 2026
20
Fleet AI
$750M · SERIES · OCT 2
1 SIGNAL · LAST SEEN OCT 2, 2026
21
Proximal
$15M · SEED · GENERAL CATALYST · SEP 30
2 SIGNALS · LAST SEEN SEP 30, 2026
22
Snorkel AI
snorkel.ai
$350M · GROWTH · WELLS FARGO STRATEGIC CAPITAL · SEP 29
8 SIGNALS · LAST SEEN SEP 29, 2026
23
xAI
x.ai
IPO · SEP 15
173 SIGNALS · LAST SEEN OCT 10, 2026
24
Listen Labs
listenlabs.ai
$125M · SERIES C · MENLO VENTURES · SEP 10
23 SIGNALS · LAST SEEN OCT 8, 2026
25
LearnVector
$100M · GROWTH · SEP 7
6 SIGNALS · LAST SEEN SEP 7, 2026
26
Figure
figure.ai
$3.5B · GROWTH · SEP 4
55 SIGNALS · LAST SEEN SEP 28, 2026
27
AfterQuery
afterquery.com
SERIES B · SEP 3
4 SIGNALS · LAST SEEN SEP 3, 2026
28
Deep Cogito
$43M · SERIES A · BENCHMARK · SEP 1
5 SIGNALS · LAST SEEN AUG 31, 2026
29
Mundo AI
$20M · SERIES A · AUG 31
1 SIGNAL · LAST SEEN AUG 31, 2026
30
Generalist AI
thegeneralist.com
$200M · SERIES B · AUG 30
25 SIGNALS · LAST SEEN AUG 30, 2026
31
Amazon
amazon.com
$75M · GROWTH · T. ROWE PRICE + MICROSOFT · AUG 29
322 SIGNALS · LAST SEEN OCT 15, 2026
32
Mercor
mercor.com
UNKNOWN · AUG 29
39 SIGNALS · LAST SEEN OCT 12, 2026
33
Hugging Face
huggingface.co
195 SIGNALS · LAST SEEN OCT 13, 2026
34
Alibaba
alibaba.com
$900M · GROWTH · ALIBABA + IDG CAPITAL · AUG 26
87 SIGNALS · LAST SEEN OCT 8, 2026
35
Mem0
mem0.ai
$20M · SERIES A · AUG 26
2 SIGNALS · LAST SEEN AUG 26, 2026
36
Google DeepMind
deepmind.com
SERIES A · AUG 22
132 SIGNALS · LAST SEEN SEP 9, 2026
37
Engram
SEED · GENERAL CATALYST · AUG 19
7 SIGNALS · LAST SEEN SEP 1, 2026
38
River
river.com
$1.1B · SERIES B · NVIDIA + AMD VENTURES · AUG 13
11 SIGNALS · LAST SEEN AUG 13, 2026
39
Arm
arm.com
$60M · SERIES B · ARM · AUG 11
8 SIGNALS · LAST SEEN SEP 3, 2026
40
Cursor
cursor.com
SERIES B · AUG 10
108 SIGNALS · LAST SEEN OCT 12, 2026
41
Surge
surgehq.ai
8 SIGNALS · LAST SEEN OCT 12, 2026
42
Micro One
4 SIGNALS · LAST SEEN SEP 30, 2026
43
McCaw
2 SIGNALS · LAST SEEN AUG 3, 2026
44
Fireworks
fireworks.ai
$1.8B · SERIES C/GROWTH/IPO · AUG 2
72 SIGNALS · LAST SEEN OCT 12, 2026
45
AgiBot
agibot.com
IPO · JUL 24
33 SIGNALS · LAST SEEN OCT 15, 2026
46
Coinbase
coinbase.com
$38M · SERIES A · QED INVESTORS + CAPITAL ONE VENTURES · JUL 21
47 SIGNALS · LAST SEEN OCT 13, 2026
47
Worldmodeldata
$9M · SEED · JUL 7
1 SIGNAL · LAST SEEN JUL 7, 2026
48
TwelveLabs
twelve-labs.com
$100M · SERIES B · NEA + NAVER VENTURES · JUL 2
4 SIGNALS · LAST SEEN OCT 7, 2026
49
Xiaomi
SERIES C · IDG + HONGSHAN · JUN 30
16 SIGNALS · LAST SEEN OCT 2, 2026
50
Google DeepMind
deepmind.google
$75M · GOOGLE DEEPMIND · JUN 23
112 SIGNALS · LAST SEEN OCT 15, 2026
51
CNTXT AI
$60M · SERIES A · JUN 22
3 SIGNALS · LAST SEEN JUN 22, 2026
52
Radical Numerics
$50M · SEED · EMERGENCE CAPITAL · JUN 16
5 SIGNALS · LAST SEEN JUN 16, 2026
53
Chan Zuckerberg Biohub
czbiohub.org
$500M · GROWTH · CHAN ZUCKERBERG INITIATIVE · JUN 10
15 SIGNALS · LAST SEEN OCT 14, 2026
54
Hanabi Capital
hanabi.capital
GROWTH · HANABI CAPITAL · JUN 10
5 SIGNALS · LAST SEEN JUN 10, 2026
55
Human Archive
humanarchive.ai
$8M · SEED · Y COMBINATOR · JUN 4
14 SIGNALS · LAST SEEN SEP 18, 2026
56
Inherent
$50M · SEED · INDEX VENTURES + RADICAL VENTURES · JUN 1
6 SIGNALS · LAST SEEN SEP 17, 2026
57
Applied Intuition
appliedintuition.com
SERIES A · LUX CAPITAL + A16Z (MARC ANDREESEN) · MAY 31
14 SIGNALS · LAST SEEN SEP 22, 2026
58
Periodic Labs
periodiclabs.ai
$0M · SEED · FELICIS + FELICIS VENTURES · MAY 31
10 SIGNALS · LAST SEEN SEP 29, 2026
59
Luel
luel.ai
$31M · SEED · LIGHTSPEED VENTURE PARTNERS + GENERAL CATALYST · MAY 31
1 SIGNAL · LAST SEEN AUG 6, 2026
60
LMArena
SEED · ANDREESSEN HOROWITZ + UC INVESTMENTS · MAY 31
1 SIGNAL · LAST SEEN MAY 31, 2026
61
Protege
withprotege.ai
$25M · SERIES_A · ANDREESSEN HOROWITZ · MAY 31
4 SIGNALS · LAST SEEN AUG 24, 2026
62
Protege AI
protege.ai
$30M · SEED · ANDREESSEN HOROWITZ · MAY 31
1 SIGNAL · LAST SEEN JUN 1, 2026
63
Poseidon
poseidon.xyz
$15M · SEED · ANDREESSEN HOROWITZ · MAY 31
1 SIGNAL · LAST SEEN MAY 31, 2026
64
DoorDash
doordash.com
31 SIGNALS · LAST SEEN OCT 11, 2026
65
AWS
aws.amazon.com
36 SIGNALS · LAST SEEN OCT 9, 2026
66
Lightwheel AI
1 SIGNAL · LAST SEEN OCT 8, 2026
67
Outskill
outskill.com
7 SIGNALS · LAST SEEN OCT 5, 2026
68
UC Berkeley
berkeley.edu
50 SIGNALS · LAST SEEN OCT 2, 2026
69
ULiPet
1 SIGNAL · LAST SEEN OCT 2, 2026
70
Mechanize
2 SIGNALS · LAST SEEN OCT 2, 2026
71
Recova
9 SIGNALS · LAST SEEN OCT 1, 2026
72
Reddit
reddit.com
15 SIGNALS · LAST SEEN OCT 1, 2026
73
X
x.com
23 SIGNALS · LAST SEEN SEP 30, 2026
74
Firecrawl
firecrawl.dev
7 SIGNALS · LAST SEEN SEP 23, 2026
75
Sama
1 SIGNAL · LAST SEEN SEP 22, 2026
76
University of Michigan
umich.edu
3 SIGNALS · LAST SEEN SEP 21, 2026
77
Apify
apify.com
3 SIGNALS · LAST SEEN SEP 20, 2026
78
Inception
6 SIGNALS · LAST SEEN SEP 18, 2026
79
GALA
3 SIGNALS · LAST SEEN SEP 18, 2026
80
DataCurve
1 SIGNAL · LAST SEEN SEP 18, 2026
81
Deep Reach
1 SIGNAL · LAST SEEN SEP 18, 2026
82
Ideogram
ideogram.ai
11 SIGNALS · LAST SEEN SEP 17, 2026
83
University of Southern California
usc.edu
16 SIGNALS · LAST SEEN SEP 9, 2026
84
Bones Studio
1 SIGNAL · LAST SEEN SEP 2, 2026
85
Annotate
1 SIGNAL · LAST SEEN AUG 6, 2026
86
Screencap
1 SIGNAL · LAST SEEN JUL 31, 2026
87
Shofo
1 SIGNAL · LAST SEEN JUL 28, 2026
88
Saj
1 SIGNAL · LAST SEEN JUL 25, 2026
89
Micro1
micro1.com
4 SIGNALS · LAST SEEN JUN 24, 2026
90
SenseNova
sensenova.sensetime.com
14 SIGNALS · LAST SEEN JUN 15, 2026
91
Lium AI
2 SIGNALS · LAST SEEN JUN 12, 2026
92
Diode Computers
2 SIGNALS · LAST SEEN JUN 11, 2026
93
Sureel AI
1 SIGNAL · LAST SEEN JUN 11, 2026
94
Kaggle
kaggle.com
1 SIGNAL · LAST SEEN JUN 11, 2026
95
Cell by Gene
1 SIGNAL · LAST SEEN JUN 10, 2026
96
Human Cell Atlas
humancellatlas.org
1 SIGNAL · LAST SEEN JUN 10, 2026
97
Yale University
yale.edu
1 SIGNAL · LAST SEEN JUN 8, 2026
98
Cornell University
cornell.edu
4 SIGNALS · LAST SEEN JUN 8, 2026
99
Mondo Robotics
9 SIGNALS · LAST SEEN JUN 8, 2026
100
Roboflow
1 SIGNAL · LAST SEEN JUN 4, 2026
101
Empromptu AI
empromptu.ai
1 SIGNAL · LAST SEEN JUN 4, 2026
102
Training Data
2 SIGNALS · LAST SEEN MAY 19, 2026
103
Scale AI / Remotasks
0 SIGNALS · LAST SEEN JAN 1, 2024
104
Outlier
0 SIGNALS · LAST SEEN JAN 1, 2024
105
Innodata Inc.
0 SIGNALS · LAST SEEN JAN 1, 2024
106
DataAnnotation
0 SIGNALS · LAST SEEN JAN 1, 2024