NeMo Data Designer
NeMo Data Designer: A broad open-source toolkit for developers creating multimodal synthetic datasets. Ranked #1 of 29 in Synthetic Data Generation Software by our editors (9.3/10); pricing: Open source; best for open-source multimodal dataset creation.
At a glance
- Editor score9.3 / 10
- PricingOpen source
- Best forOpen-source multimodal dataset creation
- Paid fromFree
- Founded1993 · Santa Clara, California, USA
- Facts checked22 Sep 2026
Where it wins
- Covers tabular, text, code, JSON, images, and embeddings
- Offers SDK, CLI, REST, hosted, and self-hosted execution
- Combines previews, dependencies, validation, and quality scoring
Where it doesn't
- Hosted NVIDIA Build jobs allow a maximum of 100 records per job
- Ecosystem integrations are concentrated in NVIDIA and NeMo services
- Generation workflows require Python configuration and schema design
Our verdict on NeMo Data Designer
NeMo Data Designer is NVIDIA’s open-source framework for creating configurable synthetic datasets from scratch or seed data. It is aimed at developers and data teams building training, testing, or evaluation datasets across tabular data, text, code, structured JSON, images, and embeddings. Seed inputs can come from CSV, Parquet, JSON, JSONL, Hugging Face, or pandas DataFrames, while outputs include CSV, JSON, JSONL, and Parquet. The platform supports web, API, and self-hosted workflows, with Python configuration at the center of dataset design.
Its strongest distinction is breadth within one generation workflow. Statistical samplers handle categorical, numerical, temporal, person, and distribution-based data, while LLM features cover text, code, structured JSON, and judge columns. Prompt-driven image generation and embeddings extend the workflow beyond conventional tabular synthesis. Dependency-aware field generation with Jinja2 templates helps connect generated values, and preview runs let teams inspect a generation plan before creating the full dataset. Python, SQL, local, and remote validation workflows add checks around the resulting data.
Execution options include a CLI, SDK, REST API, hosted NVIDIA Build service, and Docker Compose deployment for local development and testing. Integrations include NVIDIA Build API, OpenAI, OpenRouter, and NeMo services for inference, files, secrets, and jobs. This makes NeMo Data Designer a strong fit for engineering teams that want open-source control and multimodal coverage, especially within NVIDIA-oriented environments. Teams seeking a narrowly focused interface for a single data type, or a broader independently verified integration ecosystem, may prefer a more specialized alternative.
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NeMo Data Designer pricing
NeMo Data Designer fact sheet
| Free plan | Not verified |
|---|---|
| Paid from | Free |
| Data modalities | tabular, text, code, structured JSON, images, embeddings |
| Privacy technique | Not verified |
| Deployment options | Hybrid |
| API access | Yes |
| Generation limit | Not verified |
| Output formats | CSV, JSON, JSONL, Parquet |
| Deployment | Cloud, Self-hosted |
| Platforms | Web |
| Support | Docs |
| Built for | Small business, Mid-market, Enterprise (editorial estimate) |
| Integrations | 7 integrations: NVIDIA Build API, OpenAI, OpenRouter, NeMo Inference Gateway API, NeMo Files API, NeMo Secrets API … |
| Pricing | Open source |
| Website | build.nvidia.com |
| Facts checked | 22 Sep 2026 |
NeMo Data Designer integrations
NeMo Data Designer lists 7 integrations on its own site.
- NVIDIA Build API
- OpenAI
- OpenRouter
- NeMo Inference Gateway API
- NeMo Files API
- NeMo Secrets API
- NeMo Jobs API
Alternatives to NeMo Data Designer
- SAS Data MakerA mature low-code platform for generating, evaluating and augmenting synthetic data.9.1
- NVIDIA OmniverseA free, programmable toolkit for visual and sensor-data generation pipelines.9.0
- Tonic.aiBroad synthetic data and API generation with a free entry plan and paid usage tiers.8.7
See all NeMo Data Designer alternatives →
NeMo Data Designer vs the competition
- NeMo Data Designer vs SAS Data Maker
- NeMo Data Designer vs NVIDIA Omniverse
- NeMo Data Designer vs Tonic.ai
- NeMo Data Designer vs MOSTLY AI
- NeMo Data Designer vs Synthesized
- NeMo Data Designer vs Aindo Synthetic Data Platform
Compare NeMo Data Designer with any tool side by side →
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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