What is Psalm?
A PHP code analysis tool that performs type checking and detects potential issues including security problems.
Psalm pricing
Plans, per-tier features and add-ons, dated and linked to live pricing. Pricing changes often; always verify at source before you rely on it.
Free and open-source. Optional paid support contracts available.
Open Source
FreeFree and open-source static analysis tool for PHP
What Psalm 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
- Static analyzer
- Language scope
- Single-language
- Implementation language
- PHP
- Autofix
- ✓
- Config model
- Config file
- 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
- Self-hosted
Security & compliance
Known vulnerabilities: 0 (0 in the last 12 months) sourcea count reflects scale & disclosure, not quality
Psalm FAQ
Common questions about Psalm, answered from independent, dated evidence.
What is Psalm?
Psalm is a free, open-source static analyzer for PHP that identifies type-related errors and bugs in codebases at their strictest settings. It can automatically fix many common issues and supports safe coding patterns used in other languages. It is indexed under Code Quality Tools.
Source: https://psalm.dev/
Is Psalm free to use?
Psalm is open source, so it can be self-hosted and used at no licence cost. It is released under the MIT licence. Pricing changes often, so verify at source before relying on it.
Source: https://psalm.dev/
What platforms does Psalm support?
Psalm supports a command-line interface. Platforms we have not confirmed are simply not listed here rather than ruled out.
Source: https://psalm.dev/
Can Psalm be self-hosted?
Yes. Psalm can be deployed self-hosted, so it does not have to run on the vendor's infrastructure.
Source: https://psalm.dev/
Is Psalm open source?
Yes. Psalm is published under the MIT licence, a permissive licence that generally allows commercial use and modification. Licence terms can change between releases, so verify against the repository for the version you intend to use.
Source: https://github.com/vimeo/psalm
Psalm 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%
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 Psalm, not the verdict.
| Signal | Score | Weight | Contribution | Evidence |
|---|---|---|---|---|
| Release cadence | 99 | 0.07 | 6.7 | ✓ |
| Capabilities | 67 | 0.08 | 5.6 | ✓ |
| Dependent projects | 70 | 0.08 | 5.6 | ✓ |
| Stars | 71 | 0.03 | 2.3 | ✓ |
| Development activity | 19 | 0.12 | 2.3 | ✓ |
| Security score | 41 | 0.05 | 2.2 | ✓ |
| Integrations | 0 | 0.05 | 0.0 | - |
| Security posture | 0 | 0.09 | 0.0 | - |
| Package downloads | 0 | 0.17 | 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 | 3 | mediumsource · 2026-09-10 · 65% |
Adoption
Content
| Attribute | Value | Evidence |
|---|---|---|
| Faq | 5 items | mediumsource · 2026-09-10 · 67% |
Features
| Attribute | Value | Evidence |
|---|---|---|
| Capabilities | Autofix: Yes · Metrics: Yes · Function: static_analyzer · Deployment: cli_local · Open source: oss · Config model: config_file | mediumsource · 2026-09-14 · 60% |
Language
| Attribute | Value | Evidence |
|---|---|---|
| Primary | PHP | highsource · 2026-09-10 · 90% |
License
| Attribute | Value | Evidence |
|---|---|---|
| Spdx | MIT | highsource · 2026-09-10 · 95% |
Pricing
Release
Security
Is Psalm the right choice for you?
Tell us the job, the constraints and what you weigh most, and we will rank Psalm against the rest of the code quality tools we index, using the same dated evidence weighted your way.
Free to run, no account needed to start. How the evaluation works
Is this your product?
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