What is mypy?
A tool that verifies Python code for type correctness using optional type hints, enabling developers to catch errors before running the code.
mypy pricing
We don't have mypy's full plan breakdown yet (its pricing page resisted automated reading). Here's what we could confirm. Always check live pricing for exact numbers.
What mypy does
The capabilities that matter for code quality tools, normalised so it lines up with every alternative. “-” means we haven't confirmed it, not that it's missing.
- Function
- Type checker
- Language scope
- Single-language
- Implementation language
- Python
- Autofix
- ✗
- Config model
- -
- Custom rules
- ✗
- Deployment
- CLI-local
- Editor integration
- ✓
- CI / VCS gating
- ✓
- Code metrics
- ✗
- Incremental / monorepo aware
- ✓
- Open-source
- OSS
- Pricing model
- Free
Platform & deployment
Independently observed- CLI
Integrations (1)
Independently observed- VS Code•
Security & compliance
Known vulnerabilities: 0 (0 in the last 12 months) sourcea count reflects scale & disclosure, not quality
mypy FAQ
Common questions about mypy, answered from independent, dated evidence.
What is mypy?
A type analysis tool for Python that enables code to transition from pure dynamic typing to statically-typed code through annotations, with error detection at check time. Code runs with negligible performance impact and developers can incrementally adopt static types in existing projects. It is indexed under Code Quality Tools.
Source: https://mypy-lang.org
Is mypy free to use?
mypy is open source, so it can be self-hosted and used at no licence cost. Pricing changes often, so verify at source before relying on it.
Source: https://mypy-lang.org
What platforms does mypy support?
mypy supports a command-line interface. Platforms we have not confirmed are simply not listed here rather than ruled out.
Source: https://mypy-lang.org
mypy alternatives
Other code quality tools we track, ranked by the same independent score.
- PrettierA code formatter that automatically enforces consistent style across projectshigh · 79%
- StyleLintA tool for checking CSS code for errors and style inconsistenciesmedium · 72%
- ESLintStatic analysis tool that identifies and fixes issues in JavaScript codehigh · 78%
- Ruffmedium · 68%
- BlackAn opinionated Python code formatter that automatically reformats code to a consistent stylehigh · 79%
- BiomeA unified code formatter and linter for web developmentmedium · 67%
Compare mypy
Side by side against other code quality tools, attribute by attribute, with a source on every value.
The vioscaleAI score: one lens on the evidence
Not user reviews and not a paid placement: a confidence-weighted blend of the independent signals below (adoption, activity, security posture, and more), which you can sort and re-weight yourself. Vendors can correct their listing but can never move their rank, and stars are weighted low as a vanity metric. It is one way to read the evidence for mypy, not the verdict.
| Signal | Score | Weight | Contribution | Evidence |
|---|---|---|---|---|
| Package downloads | 98 | 0.17 | 16.9 | ✓ |
| Dependent projects | 79 | 0.08 | 6.3 | ✓ |
| Development activity | 51 | 0.12 | 6.1 | ✓ |
| Capabilities | 58 | 0.08 | 4.8 | ✓ |
| Security score | 67 | 0.05 | 3.6 | ✓ |
| Stars | 81 | 0.03 | 2.7 | ✓ |
| Integrations | 9 | 0.05 | 0.5 | ✓ |
| Release cadence | 0 | 0.07 | 0.0 | - |
| Security posture | 0 | 0.09 | 0.0 | - |
| Developer Q&A activity | 0 | 0.08 | 0.0 | - |
Computed . Re-weight it by intent, or see the full method.
All data & sourcesshow ↓
Every value we hold, with its source, retrieval date, and confidence. This is the evidence behind the score: don't trust it, verify it.
Activity
| Attribute | Value | Evidence |
|---|---|---|
| Commits last 30d | 40 | mediumsource · 2026-09-10 · 65% |
Adoption
Content
| Attribute | Value | Evidence |
|---|---|---|
| Faq | 3 items | mediumsource · 2026-09-10 · 60% |
Features
| Attribute | Value | Evidence |
|---|---|---|
| Capabilities | Autofix: No · Metrics: No · Function: type_checker · Ci gating: Yes · Deployment: cli_local · Incremental: Yes | mediumsource · 2026-09-10 · 60% |
Integrations
| Attribute | Value | Evidence |
|---|---|---|
| Count | 1 | mediumsource · 2026-09-10 · 60% |
Language
| Attribute | Value | Evidence |
|---|---|---|
| Primary | Python | highsource · 2026-09-10 · 98% |
Pricing
Security
Is mypy the right choice for you?
Tell us the job, the constraints and what you weigh most, and we will rank mypy against the rest of the code quality tools we index, using the same dated evidence weighted your way.
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