kitio.aiPolyaxon vs Stacklok
A side-by-side look at pricing plans, free tiers, features, pros and cons, updated for 2026. Polyaxon starts at $555/mo and Stacklok starts at See pricing page. Check both pricing pages for current plans.
At a glance
Best for
Category
Pricing model
Starting price
Free plan
Made by
Based in
Rating
Key features
- Training and fine-tuning jobs
- Hyperparameter sweeps and DAGs
- Model serving and notebooks
- Experiment tracking and registry
- Agent sandboxes
- Access policies and audit logs
- MCP registry
- MCP gateway
- MCP runtime
- AI gateway
- Kubernetes-native deployment
- Open-source agent harness
| Feature | Polyaxon | Stacklok |
|---|---|---|
| Best for | Open-source control plane for ML training, serving and agents on Kubernetes | Kubernetes-native MCP and AI gateway platform for enterprise agents |
| Category | Models & APIs | Models & APIs |
| Pricing model | Freemium | Freemium |
| Starting price | $555/mo | See pricing page |
| Free plan | Yes | Yes |
| Made by | Polyaxon | Stacklok |
| Based in | – | United States |
| Rating | No ratings yet | No ratings yet |
| Key features |
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Pricing compared
Polyaxon starts at $555/mo and Stacklok starts at See pricing page. Check both pricing pages for current plans.
Free plan
Cheapest paid plan
Top plan
Free trial
4 plans
Open Source
Free
- Self-hosted
- Core tracking and scheduling
Platform
$555/mo
- 3 developer seats
- 1 compute cluster
- 50 concurrent runs
- Collaboration features
Teams
$1500/mo
- 6 developer seats
- 2 compute clusters
- Teams management
- Priority support
Enterprise
Custom
- Custom seats
- Custom policies and deployment
Prices in USD, checked Oct 29, 2026 or later. Plans change often, so confirm on each tool's site before you buy.
Pros and cons
Polyaxon
- Self-hosted, data stays on your infra
- Covers training, serving and tracking
- Free for academics
- Paid plans start at a high price
- Requires Kubernetes expertise
- Extra seats and clusters cost more
Stacklok
- Built by Kubernetes co-creators
- Avoids lock-in to one model vendor
- Fits existing Kubernetes ops
- Requires Kubernetes expertise
- Enterprise pricing not published
- Aimed at platform teams, not end users
Which one should you choose?
Choose Polyaxon if you want:
- Self-hosted, data stays on your infra
- Covers training, serving and tracking
- Free for academics
Watch out: paid plans start at a high price.
Choose Stacklok if you want:
- Built by Kubernetes co-creators
- Avoids lock-in to one model vendor
- Fits existing Kubernetes ops
Watch out: requires kubernetes expertise.
Polyaxon vs Stacklok FAQ
What is the difference between Polyaxon and Stacklok?
Polyaxon: Open-source control plane for ML training, serving and agents on Kubernetes. Stacklok: Kubernetes-native MCP and AI gateway platform for enterprise agents. Both are models & apis tools.
Is Polyaxon or Stacklok cheaper?
Polyaxon starts at $555/mo and Stacklok starts at See pricing page. Check both pricing pages for current plans.
Do Polyaxon and Stacklok have free plans?
Polyaxon: Yes. Stacklok: Yes.
Who makes Polyaxon?
Polyaxon is made by Polyaxon.
Who makes Stacklok?
Stacklok is made by Stacklok, based in United States.
Which should I choose, Polyaxon or Stacklok?
Choose Polyaxon if you value self-hosted, data stays on your infra and covers training, serving and tracking. Choose Stacklok if you value built by kubernetes co-creators and avoids lock-in to one model vendor.