Comparison

Locust vs pytest

On the evidence we track, pytest leads this comparison with a composite score of 75/100. Scores are only directly comparable because these tools share a category; the full breakdown and every source is below.

Locust full profile →pytest full profile →

Machine formatsMarkdownJSONGraphQLMarkdown is open. JSON and GraphQL need a free key.

Locust57

★pytest75

Attribute comparison across 2 tools
Attribute	Locust	pytestLeader
vioscaleAI score	57 / 100low · 49%	75 / 100medium · 72%
Pricing
Free tierpricing.free_tier	✓	✓
Modelpricing.model	commercial	open_source
Price levelpricing.price_level	free	free
Transparentpricing.transparent	✓	-
Integrations
Countintegrations.count	4	-
Security
Scorecardsecurity.scorecard	6.3	7
Vulnerabilitiessecurity.vulnerabilities	Count: 1 · Source: https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=pypi&package_name=locust&per_page=100 · Last 12m: 0 · Max severity: MODERATE	Count: 1 · Source: https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=pypi&package_name=pytest&per_page=100 · Last 12m: 1 · Max severity: MODERATE
Adoption
Dependent reposadoption.dependent_repos	1,883	283,154
Github starsadoption.github_stars	28,210	14,599
Package downloads weeklyadoption.package_downloads_weekly	-	209,672,006
Stackoverflow questionsadoption.stackoverflow_questions	-	30,000
Activity
Commits last 30dactivity.commits_last_30d	53	54
Release
Cadence daysrelease.cadence_days	13	46
Historyrelease.history	20 items	20 items
License
Spdxlicense.spdx	MIT	MIT
Language
Primarylanguage.primary	Python	Python
Market
Availabilitymarket.availability	-	Available worldwide
Content
Faqcontent.faq	5 items	8 items

Score

vioscaleAI score

Locust57 / 100low · 49%

pytest75 / 100medium · 72%

Pricing

Free tier

Locust✓

pytest✓

Model

Locustcommercial

pytestopen_source

Price level

Locustfree

pytestfree

Transparent

Locust✓

pytest–

Integrations

Count

Locust4

pytest–

Security

Scorecard

Locust6.3

pytest7

Vulnerabilities

LocustCount: 1 · Source: https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=pypi&package_name=locust&per_page=100 · Last 12m: 0 · Max severity: MODERATE

pytestCount: 1 · Source: https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=pypi&package_name=pytest&per_page=100 · Last 12m: 1 · Max severity: MODERATE

Adoption

Dependent repos

Locust1,883

pytest283,154

Github stars

Locust28,210

pytest14,599

Package downloads weekly

Locust–

pytest209,672,006

Stackoverflow questions

Locust–

pytest30,000

Activity

Commits last 30d

Locust53

pytest54

Release

Cadence days

Locust13

pytest46

History

Locust20 items

pytest20 items

License

Spdx

LocustMIT

pytestMIT

Language

Primary

LocustPython

pytestPython

Market

Availability

Locust–

pytestAvailable worldwide

Content

Faq

Locust5 items

pytest8 items

Capabilities

Feature-by-feature on the axes that matter for testing tools. “-” means undocumented, not absent.

Capability comparison for Testing Tools
Capability	Locust	pytest
Core
Test types	-	-
Browser automation	✓	-
Built-in assertion library	-	✓
Languages	Python	Python
Isolation
Mocking / stubbing	-	-
Techniques
Snapshot testing	-	-
Performance
Parallel execution	✓	-
Insight
Code coverage	-	-
DX
Watch mode	-	-
Ops
CI integration	✓	✓

Core

Test types

Locust-

pytest-

Browser automation

Locust✓

pytest-

Built-in assertion library

Locust-

pytest✓

Languages

LocustPython

pytestPython

Isolation

Mocking / stubbing

Locust-

pytest-

Techniques

Snapshot testing

Locust-

pytest-

Performance

Parallel execution

Locust✓

pytest-

Insight

Code coverage

Locust-

pytest-

Watch mode

Locust-

pytest-

Ops

CI integration

Locust✓

pytest✓

What each one is

The product in its own terms, so the numbers below have context.

Locust

An open-source framework for writing performance tests as regular Python code, supporting distributed testing across multiple machines with real-time progress monitoring and the ability to test HTTP and other protocols.

Independently observed

pytest

Leader

A Python framework designed for writing tests ranging from basic to complex, featuring straightforward assertion syntax with detailed failure diagnostics and built-in support for test organization through fixtures and parameterization.

Independently observed

Pricing

List pricing as published by each vendor, with the date we read it. Always verify at the source before you buy.

Locust

Open sourceFree tier

as of 2026-08-16verify ↗

pytest

Leader

Open sourceFree tier

Free and open source. Enterprise support available via Tidelift.

Community (Open Source)Free
- Detailed assertion introspection
- Auto-discovery of test modules
- Modular fixtures
- unittest compatibility
- 1300+ external plugins
Enterprise SupportContact sales

as of 2026-07-08verify ↗

Platform & deployment

Where each product runs and how it can be hosted. A dash means undocumented, not unsupported.

Platform and deployment support comparison
Supports	Locust	pytest
WebPlatforms	✓	✗
CLIPlatforms	✓	✓
Self-hostedDeployment	✓	✓

Platforms

Web

Locust✓

pytest✗

CLI

Locust✓

pytest✓

Deployment

Self-hosted

Locust✓

pytest✓

Integrations

What each product connects to. Counts come from the vendor's own integration directory where one exists.

Locust

4 total

Azure Load Testing
Azure DevOps
GitHub
VS Code

Independently observed

pytest

Leader

Not documented yet.

Still deciding?

Locust or pytest: which one depends on you

A composite score cannot know your constraints. Describe them and both get re-weighted against what you actually need, with the evidence behind every position.

Free to run, no account needed to start. How the evaluation works

Comparison generated from independently-sourced facts. Every value links to its source and retrieval date. See the method.