kitio.aiMetaflow vs LMQL
A side-by-side look at pricing plans, free tiers, features, pros and cons, updated for 2026. Metaflow starts at Free and LMQL starts at Free. 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
- Workflows in plain Python
- Automatic versioning
- One-command production deploy
- Cloud compute and GPUs
- Event-based triggers
- Constrained generation
- Typed output variables
- Python integration
- Nested queries
- Online playground
| Feature | Metaflow | LMQL |
|---|---|---|
| Best for | Open-source Python framework for ML and AI workflows | Programming language for prompting LLMs with types and constraints |
| Category | Models & APIs | Models & APIs |
| Pricing model | Free | Free |
| Starting price | Free | Free |
| Free plan | Yes, fully free | Yes, fully free |
| Made by | Outerbounds | SRI Lab, ETH Zurich |
| Based in | – | Switzerland |
| Rating | No ratings yet | No ratings yet |
| Key features |
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Pricing compared
Metaflow starts at Free and LMQL starts at Free. Check both pricing pages for current plans.
Free plan
Cheapest paid plan
Top plan
Free trial
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
Metaflow
- Free and open source
- Same code runs locally and in production
- Tracks every step automatically
- Requires Python skills
- Cloud setup takes effort
LMQL
- Free and open source
- Guarantees output formats
- Backed by academic research
- New syntax to learn
- Smaller community than mainstream frameworks
- Release pace has been slow
Which one should you choose?
Choose Metaflow if you want:
- Free and open source
- Same code runs locally and in production
- Tracks every step automatically
Watch out: requires python skills.
Choose LMQL if you want:
- Free and open source
- Guarantees output formats
- Backed by academic research
Watch out: new syntax to learn.
Metaflow vs LMQL FAQ
What is the difference between Metaflow and LMQL?
Metaflow: Open-source Python framework for ML and AI workflows. LMQL: Programming language for prompting LLMs with types and constraints. Both are models & apis tools.
Is Metaflow or LMQL cheaper?
Metaflow starts at Free and LMQL starts at Free. Check both pricing pages for current plans.
Do Metaflow and LMQL have free plans?
Metaflow: Yes, fully free. LMQL: Yes, fully free.
Who makes Metaflow?
Metaflow is made by Outerbounds.
Who makes LMQL?
LMQL is made by SRI Lab, ETH Zurich, based in Switzerland.
Which should I choose, Metaflow or LMQL?
Choose Metaflow if you value free and open source and same code runs locally and in production. Choose LMQL if you value free and open source and guarantees output formats.