Tabular, time-series and graph ML
Learning from tables, time series and graphs, including forecasting and the detection of unusual observations.
By Dave Savostyanov. 2025 data · Sources: 26 Sep 2026
2025 figures. Papers are OpenAlex query matches; author ranges and investment allocations are scenarios. Author counts marked “observed” cover the full query result. Areas overlap and cannot be added together. About the data.
Bars compare publication counts within this page. Topic tags describe subtopics, not separately measured markets. Organization examples link to their sources; activity was checked in September 2026.
Tabular ML
Trees, boosting, neural and foundation models for tables, missing data, imbalance, and structured prediction.
- Authors · scenario
- 17k–83k
- Investment · scenario
- $2.88B–$11.5B
Sources and methodology
Publication activity
- 2019
- 472
- 2020
- 1,177
- 2021
- 2,268
- 2022
- 3,704
- 2023
- 5,481
- 2024
- 9,314
- 2025
- 19,047
The query includes mentions of boosting, so some applied papers may concern other data types.
Title and abstract matches for articles, preprints and reviews; retracted work is excluded. Versions and overlapping areas may be counted more than once.
("tabular data" OR "tabular learning" OR "tabular foundation model" OR "gradient boosting decision tree" OR "CatBoost" OR "XGBoost" OR "TabPFN") AND (("machine learning" OR "deep learning" OR "neural network" OR "artificial intelligence"))Retrieved 2026-09-26.
OpenAlex query resultsPublishing authors
Base scenario: 28k publishing authors. Paper count × 4.36 known authors per paper ÷ 3 papers per author per year. The range assumes 1–5 papers per author; the base and both ends of the range are at least the 8,614 distinct Author IDs already observed in the sample.
The publication rate is an assumption, not a measured rate for this field. The range is a scenario, not a confidence interval.
Random sample: 2,000 of 19,047 papers (10.5%). 9.0% of authorship records lack an Author ID; 23.7% of retrieved works lack an abstract. Retrieved 2026-09-26.
Mean known authors per paper: 4.36; 95% bootstrap interval 4.23–4.51. This describes sampling variability, not search accuracy or uncertainty in the number of researchers.
Applied coauthors are included. Missing or incorrectly linked author records affect these figures. They do not measure research jobs or everyone working in a field.
OpenAlex sample queryPrivate investment
An assumed allocation of broader investment segments. The range is 0.5–2× the base case. Shares are editorial assumptions, not measured deals or research spending.
Base case: $5.77B.
- Data management, processing: $31.6B × 5.00%
- Retail: $4.10B × 10.00%
- Medical and healthcare: $11.8B × 15.00%
- Fintech: $6.52B × 25.00%
- Accounting/finance: $2.59B × 15.00%
Company investment, not revenue or research spending. Ranges are scenarios, not confidence intervals.
Stanford AI Index 2026 / QuidScope and related research
Unlike time series, rows need not form a temporal sequence.
Organizations
Selected examples- Yandex Research Tools & infrastructure
CatBoost applies gradient-boosted decision trees to structured data.
- Prior Labs Models
Tabular foundation models.
- H2O.ai Product
Automated ML and predictive modeling tools.
Time series and forecasting
Forecasting, temporal representations, spatiotemporal models, multivariate series, and change points.
- Authors · scenario
- 3.1k–7.4k
- Investment · scenario
- $3.28B–$13.1B
Sources and methodology
Publication activity
- 2019
- 354
- 2020
- 588
- 2021
- 706
- 2022
- 881
- 2023
- 1,129
- 2024
- 1,513
- 2025
- 2,290
Matches include papers applying these methods. Search precision and recall have not been systematically measured.
Title and abstract matches for articles, preprints and reviews; retracted work is excluded. Versions and overlapping areas may be counted more than once.
("time series forecasting" OR "time series prediction" OR "time series foundation model" OR "time series representation" OR "spatiotemporal forecasting") AND (("machine learning" OR "deep learning" OR "neural network" OR "artificial intelligence"))Retrieved 2026-09-26.
OpenAlex query resultsPublishing authors
Base scenario: 3.1k publishing authors. Paper count × 3.25 known authors per paper ÷ 3 papers per author per year. The range assumes 1–5 papers per author; the base and both ends of the range are at least the 3,128 distinct Author IDs already observed in the sample.
The publication rate is an assumption, not a measured rate for this field. The range is a scenario, not a confidence interval.
Random sample: 1,000 of 2,290 papers (43.7%). 13.2% of authorship records lack an Author ID; 25.1% of retrieved works lack an abstract. Retrieved 2026-09-26.
Mean known authors per paper: 3.25; 95% bootstrap interval 3.11–3.39. This describes sampling variability, not search accuracy or uncertainty in the number of researchers.
Applied coauthors are included. Missing or incorrectly linked author records affect these figures. They do not measure research jobs or everyone working in a field.
OpenAlex sample queryPrivate investment
An assumed allocation of broader investment segments. The range is 0.5–2× the base case. Shares are editorial assumptions, not measured deals or research spending.
Base case: $6.57B.
- Data management, processing: $31.6B × 3.00%
- Internet of things: $14.6B × 20.00%
- Fintech: $6.52B × 20.00%
- Energy management: $4.64B × 30.00%
Company investment, not revenue or research spending. Ranges are scenarios, not confidence intervals.
Stanford AI Index 2026 / QuidScope and related research
Anomaly detection is a related task across time series and other data types.
Organizations
Selected examples- Google Research Models
TimesFM research develops foundation models for time-series forecasting.
- Nixtla Product
Time-series foundation models.
- Amazon / AWS Research
Published research on probabilistic forecasting and time series.
Graph machine learning
Graph neural networks, graph transformers, link prediction, and geometric or relational representations.
- Authors · scenario
- 9.0k–45k
- Investment · scenario
- $3.46B–$13.9B
Sources and methodology
Publication activity
- 2019
- 850
- 2020
- 1,848
- 2021
- 3,050
- 2022
- 4,621
- 2023
- 6,271
- 2024
- 8,483
- 2025
- 11,725
Matches include papers applying these methods. Search precision and recall have not been systematically measured.
Title and abstract matches for articles, preprints and reviews; retracted work is excluded. Versions and overlapping areas may be counted more than once.
("graph neural network" OR "graph transformer" OR "graph representation learning" OR "graph machine learning" OR "graph embedding")Retrieved 2026-09-26.
OpenAlex query resultsPublishing authors
Base scenario: 15k publishing authors. Paper count × 3.83 known authors per paper ÷ 3 papers per author per year. The range assumes 1–5 papers per author; the base and both ends of the range are at least the 3,723 distinct Author IDs already observed in the sample.
The publication rate is an assumption, not a measured rate for this field. The range is a scenario, not a confidence interval.
Random sample: 1,000 of 11,725 papers (8.5%). 12.3% of authorship records lack an Author ID; 23.0% of retrieved works lack an abstract. Retrieved 2026-09-26.
Mean known authors per paper: 3.83; 95% bootstrap interval 3.68–3.98. This describes sampling variability, not search accuracy or uncertainty in the number of researchers.
Applied coauthors are included. Missing or incorrectly linked author records affect these figures. They do not measure research jobs or everyone working in a field.
OpenAlex sample queryPrivate investment
An assumed allocation of broader investment segments. The range is 0.5–2× the base case. Shares are editorial assumptions, not measured deals or research spending.
Base case: $6.93B.
- Data management, processing: $31.6B × 5.00%
- Cybersecurity, data protection: $8.42B × 10.00%
- Pharmaceutical: $10.6B × 25.00%
- Biotech: $4.84B × 25.00%
- Fintech: $6.52B × 10.00%
Company investment, not revenue or research spending. Ranges are scenarios, not confidence intervals.
Stanford AI Index 2026 / QuidScope and related research
Learning on graphs is distinct from building knowledge graphs.
Organizations
Selected examples- Google Research Tools & infrastructure
TensorFlow GNN supports heterogeneous graph neural networks.
- Neo4j Product
Graph data science and knowledge graphs.
- Kumo AI Product
Graph and relational predictive models.
More organizations (2)
- Google DeepMind Research
GNoME applies graph neural networks to crystal stability prediction.
- TigerGraph Tools & infrastructure
Graph machine-learning tools combine entity features with network relationships.
Anomaly and novelty detection
Rare deviations, new classes, and out-of-distribution detection in time series, graphs, tables, and images.
- Authors · scenario
- 4.5k–23k
- Investment · scenario
- $3.40B–$13.6B
Sources and methodology
Publication activity
- 2019
- 702
- 2020
- 1,134
- 2021
- 1,670
- 2022
- 2,045
- 2023
- 2,723
- 2024
- 4,185
- 2025
- 7,526
Matches include papers applying these methods. Search precision and recall have not been systematically measured.
Title and abstract matches for articles, preprints and reviews; retracted work is excluded. Versions and overlapping areas may be counted more than once.
("anomaly detection" OR "novelty detection" OR "out of distribution detection" OR "outlier detection") AND (("machine learning" OR "deep learning" OR "neural network" OR "artificial intelligence"))Retrieved 2026-09-26.
OpenAlex query resultsPublishing authors
Base scenario: 7.6k publishing authors. Paper count × 3.02 known authors per paper ÷ 3 papers per author per year. The range assumes 1–5 papers per author; the base and both ends of the range are at least the 2,969 distinct Author IDs already observed in the sample.
The publication rate is an assumption, not a measured rate for this field. The range is a scenario, not a confidence interval.
Random sample: 1,000 of 7,526 papers (13.3%). 11.5% of authorship records lack an Author ID; 16.7% of retrieved works lack an abstract. Retrieved 2026-09-26.
Mean known authors per paper: 3.02; 95% bootstrap interval 2.82–3.28. This describes sampling variability, not search accuracy or uncertainty in the number of researchers.
Applied coauthors are included. Missing or incorrectly linked author records affect these figures. They do not measure research jobs or everyone working in a field.
OpenAlex sample queryPrivate investment
An assumed allocation of broader investment segments. The range is 0.5–2× the base case. Shares are editorial assumptions, not measured deals or research spending.
Base case: $6.81B.
- Data management, processing: $31.6B × 2.00%
- Cybersecurity, data protection: $8.42B × 35.00%
- Internet of things: $14.6B × 10.00%
- Fintech: $6.52B × 20.00%
- Energy management: $4.64B × 10.00%
Company investment, not revenue or research spending. Ranges are scenarios, not confidence intervals.
Stanford AI Index 2026 / QuidScope and related research
A cross-cutting task; a paper may also belong to its underlying data modality.
Organizations
Selected examples- Nixtla Product
Time-series foundation models.
- Feedzai Product
Financial fraud detection.
- Darktrace Product
AI cybersecurity.
More organizations (6)
- Abnormal AI Product
Email security.
- C3 AI Product
Enterprise and industrial AI.
- Falkonry Product
Industrial time-series intelligence.
- Featurespace Product
Fraud detection.
Part of Visa - Sift Product
Fraud decisioning.
- Vectra AI Product
Threat detection.