What-If Tool
What-If Tool: A free, open-source tool for visual model explanations, counterfactuals, and fairness checks. Ranked #11 of 29 in AI Model Explainability Software by our editors (7.2/10); pricing: Free plan; best for notebook users exploring explanations and fairness visually.
At a glance
- Editor score7.2 / 10
- PricingFree plan
- Best forNotebook users exploring explanations and fairness visually
- Free planYes
- Paid fromNone
- Feature attributionYes
- Facts checked28 Sep 2026
Where it wins
- Edit datapoints and test hypothetical changes interactively
- Explore attributions, counterfactuals, and subgroup fairness metrics
- Integrates with Jupyter, Colab, Cloud AI notebooks, and TensorBoard
Where it doesn't
- Listed model support centers on TensorFlow and custom prediction functions
- No export feature for generating audit reports
- Requires a notebook, TensorBoard, or supported model environment
Our verdict on What-If Tool
What-If Tool (WIT) is an open-source visual interface for investigating trained machine-learning models with minimal coding. It is suited to notebook users who want to probe classification or regression behavior, compare models, and examine how results vary across datasets and subgroups. Users can edit datapoints to test hypothetical changes, view partial-dependence and datapoint visualizations, inspect feature attributions, search for counterfactual examples, and review fairness metrics. Its scope also covers tabular, image, and text data, making it useful for exploratory analysis across different kinds of inputs.
WIT’s main appeal is the range of questions it supports in one visual workflow. Attribution views include SHAP, LIME, integrated gradients, and SmoothGrad through custom functions; counterfactual search and subgroup performance analysis complement those views. Model comparison can be performed across datasets and subsets. The tool connects with Jupyter, Google Colaboratory, Google Cloud AI Platform or Vertex AI notebooks, and TensorBoard, with TFMA Fairness Indicators also among its integrations. This makes it a natural fit for teams already working in those environments, rather than a standalone explanation service.
The project is distributed under the Apache License 2.0, with no-cost access and no paid tiers described. Model support includes TensorFlow Estimators, TensorFlow Serving models, Cloud AI Platform models, and arbitrary Python models supplied through custom prediction functions. That flexibility has a boundary: users outside those model paths may need to adapt their prediction workflow. WIT also has no export feature for audit-report generation, so teams that need packaged audit reports should choose a different tool. Pick WIT for visual investigation and fairness exploration in notebooks; look elsewhere when report export or broader out-of-the-box model support is central.
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What-If Tool pricing
What-If Tool fact sheet
| Free plan | Yes |
|---|---|
| Paid from | None |
| Feature attribution | Yes |
| Counterfactual explanations | Yes |
| Fairness analysis | Yes |
| Audit reports | No |
| Deployment options | Hybrid |
| Supported model types | TensorFlow Estimators; TensorFlow Serving models; Cloud AI Platform models; arbitrary Python models via custom prediction functions |
| Deployment | Cloud, Self-hosted |
| Platforms | Web |
| Support | Community, Docs |
| Built for | Solo, Small business, Mid-market, Enterprise (editorial estimate) |
| Integrations | 5 integrations: Jupyter, Google Colaboratory, Google Cloud AI Platform/Vertex AI notebooks, TensorBoard, TFMA Fairness Indicators |
| Pricing | Free plan |
| Website | pair-code.github.io |
| Facts checked | 28 Sep 2026 |
What-If Tool integrations
What-If Tool lists 5 integrations on its own site.
- Jupyter
- Google Colaboratory
- Google Cloud AI Platform/Vertex AI notebooks
- TensorBoard
- TFMA Fairness Indicators
Alternatives to What-If Tool
- AIX360A broad, self-hosted Python toolkit for local, global, and time-series model explanations.9.1
- Arize AIProduction-focused explainability pairs feature attribution with fairness monitoring and model comparisons.8.5
- Fiddler AIA tracing and evaluation platform for teams debugging LLM and agent workflows.7.4
See all What-If Tool alternatives →
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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