Nyckel
What it is
Nyckel provides live API endpoints that turn inputs into structured decisions while handling model selection, training, hosting, monitoring, and ongoing improvement. It supports classification, Box Detect, and Search functions, with image classification, object detection, OCR, and custom models listed among its capabilities. A function endpoint becomes live when created and can return predictions before labeled examples are added. Predictions include calibrated confidence scores from 0.0 to 1.0. Reviewed predictions can become training samples, and Nyckel retrains and promotes a model only when it scores better than the current one. The REST API uses bearer-token authentication and includes endpoints for functions, labels, samples, annotations, and invocation. A Zapier integration provides classify, import, and train actions on every plan. Custom models can run in Nyckel infrastructure across AWS, GCP, or Azure regions, or in a customer cloud. The Free plan includes 100 invokes monthly, 200 samples, and five functions. Paid plans start at $149 a month.
For and against
For
- Live endpoints before labeled data
- Calibrated confidence scores
- REST API with bearer tokens
- Zapier integration on every plan
- Cloud or customer-cloud deployment
Against
- Free plan limits monthly invokes
- Additional usage is billed
- Object detection training has stated limits
The verdict
Nyckel packages model operations and prediction APIs with a free tier and usage-based paid plans. Its endpoint, feedback, integration, and deployment options fit teams building custom decision services.
Who it suits
It suits developers and teams that need hosted prediction endpoints, feedback-based model improvement, or object and image analysis. Enterprise customers can add regional deployment, compliance features, and dedicated ML support.
Plans and prices
Free
100 invokes/month · up to 200 samples · up to 5 functions · $0.005 per invoke after included usage
Read 30 Sep 2026 · nyckel.com
Starter
15,000 invokes/month · up to 30k samples · up to 20 functions · $0.005 per invoke
Read 30 Sep 2026 · nyckel.com
Business
300,000 invokes/month · up to 600k samples · up to 100 functions · $0.001 per invoke
Read 30 Sep 2026 · nyckel.com
Enterprise
Dedicated infrastructure and regional deployments · enterprise security and compliance · large-scale retention and auditing · advanced integrations and tooling
Read 30 Sep 2026 · nyckel.com
On the record
- API access
- The platform exposes a REST API with bearer-token authentication and endpoints for functions, labels, samples, annotations, and invocation.nyckel.com · read 30 Sep 2026
- Confidence scores
- Function predictions include a calibrated confidence score ranging from 0.0 to 1.0.nyckel.com · read 30 Sep 2026
- Deployment
- Nyckel says custom models can be deployed in its secure infrastructure in any AWS, GCP, or Azure region or in the customer's cloud.nyckel.com · read 30 Sep 2026
- Feedback loop
- Reviewed predictions become training samples and Nyckel retrains and promotes a new model only when it scores better than the current one.nyckel.com · read 30 Sep 2026
- Function types
- Nyckel supports classification, Box Detect, and Search functions.nyckel.com · read 30 Sep 2026
- Immediate endpoint
- A function endpoint is live when created and can return predictions before labeled examples are added.nyckel.com · read 30 Sep 2026
- Integrations
- Nyckel offers a Zapier integration with classify, import, and train actions, and the integration is available to users on any plan.nyckel.com · read 30 Sep 2026
- Object detection limits
- Nyckel's bounding-box product lists up to 1,000 classes, 1M images, and 2–4 hours per training.nyckel.com · read 30 Sep 2026
- Security compliance
- Nyckel's terms state that it will maintain annually updated reports or certifications for penetration testing and SOC2 Type I.nyckel.com · read 30 Sep 2026
- Support
- The Enterprise plan includes dedicated ML support and consulting.nyckel.com · read 30 Sep 2026
- Training-data privacy
- Nyckel states that customer training data is used exclusively to train models for that customer and is not used to train models for another party.nyckel.com · read 30 Sep 2026
- What it does
- Nyckel provides live API endpoints that turn inputs into structured decisions while handling model selection, training, hosting, monitoring, and continuous improvement.nyckel.com · read 30 Sep 2026
