Speed up your tests with optimal test suite parallelisation

Split your tests evenly on parallel CI nodes to run faster CI builds and save time.

Without Knapsack Pro

you have to wait 20 minutes for slow tests running too long on red node

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Run fast parallel CI build with Knapsack Pro

CI build completes work in only 10 minutes because Knapsack Pro ensures all parallel nodes finish work at a similar time

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You can even run 20 parallel nodes to complete your CI build in 2 minutes

How it works

1. Install Knapsack Pro client in your project

2. Add Knapsack Pro client to your current CI server and run your tests in parallel

Knapsack Pro how it works with CI server

3. Update your CI server config file to run tests in parallel with Knapsack Pro

Knapsack Pro in Queue Mode will split tests in a dynamic way across parallel CI nodes to ensure each CI node finishes work at a similar time. Thanks to that your CI build time is as fast as possible. It works with many supported CI servers.

How to install it

Programming Language	Supported test runners	Installation guide	Knapsack Pro Library README / Source	FAQ
Ruby	RSpec, Cucumber, Minitest, test-unit, Spinach, Turnip	Install	knapsack_pro gem	FAQ
JavaScript	Cypress.io	Install	@knapsack-pro/cypress	FAQ
JavaScript	Jest	Install	@knapsack-pro/jest	FAQ
JavaScript / TypeScript	Any test runner in JavaScript	How to build native integration with Knapsack Pro API to run tests in parallel for any test runner	@knapsack-pro/core	FAQ
Any programming language	Any test runner	How to build a custom Knapsack Pro API client from scratch in any programming language	-	-

Do you use other programming language or test runner? Let us know.

Do you know

Hundreds of developers use Knapsack Pro every day to run fast CI builds.
Risk-free integration! Knapsack Pro runs tests in Fallback Mode if your CI servers can't reach our API for any reason.
We don't need access to your repository. Knapsack Pro is just wrapper around test runner like RSpec, Cucumber, Cypress etc.

Start using Knapsack Pro

Sign up and speed up your tests.

Trusted solution

Join the teams optimizing their tests with Knapsack Pro.

We've been really enjoying Knapsack Pro, it's been saving us a ton of time.

Devin Brown Software Engineer at Pivotal

This is a fantastic product, it's been a total game-changer for us.

Geoff Harcourt CTO at CommonLit

We are using CircleCI and we noticed that builds were being limited by the slowest parallelized container. Knapsack Pro was really east to setup and we saw huge improvements right away. Thank you for making this tool!

Martin Sieniawski Software Engineer at Collage

🛠 How to run 7 hours of tests in 4 minutes using 100 parallel Buildkite agents and @KnapsackPro’s queue mode: https://t.co/zbXMIyNN8z
— Buildkite (@buildkite) March 29, 2017

Knapsack Pro has helped us build an insanely fast and scalable build pipeline with almost no setup or maintenance.

Tim Lucas Co-founder of buildkite.com

Knapsack Pro saves us hours of engineer waiting time every week, and is the best solution for keeping our tests load balanced that we've used to date.

Michael Amygdalidis Senior Software Engineer at Popular Pays

I've been playing with Queue Mode. Love it! Wow, I love how fast it goes.

Michael Menne CTO at humanagency.org

Awesome to see @NASA speeds up tests with #knapsack gem in https://t.co/GFOVW22dJn project! https://t.co/2GGbvnbQ7a #ruby #parallelisation
— KnapsackPro (@KnapsackPro) April 6, 2017

I just logged into my account expecting it to say that I needed to add a credit card and was so surprised and delighted to see the trial doesn't count usage by calendar days but by testing days! This is incredible! I love it!!!

I just wanted to say that I really appreciate that small but very huge feature. Thank you for being so thoughtful :)

Shannon Baffoni Senior Software Engineer
at Blue Bottle Coffee

See more testimonials

Features that make your tests perform better

Queue mode see video

Dynamic tests allocation across CI nodes. It ensures all parallel CI nodes finish work at a similar time to get the fastest CI build time.

Queue Mode solves CI node bottlenecks impacting your parallel tests split:
- random test files execution time (i.e. E2E tests)
- flaky tests (retrying test can slow down CI node)
- failed tests often leave room on CI node to run more tests
- overloaded CI node can become a bottleneck
Regular mode see video

Test suite split based on time execution. Generates subset of test suite per CI node before running tests.
Fallback mode

Network issues? Not a problem, run tests anyway! Auto switch to the fallback mode to not depend on Knapsack Pro API.
Auto split slow test file by test examples

A single slow RSpec test file can be auto split by test examples between parallel jobs
Supported test runners

Ruby: RSpec, Minitest, Test::Unit, Cucumber, Spinach, Turnip.

JavaScript: Cypress.io, Jest

API: Use native integration with Knapsack Pro API to run tests in parallel for any test runner

Other languages: How to build a custom Knapsack Pro API client from scratch in any programming language

Do you use different programming language or test runner? Let us know in the poll

Discover all features or see
how to use Knapsack Pro with your CI

Problem you want to solve

Do you wait 15 minutes or even a few hours to run tests on CI? Slow tests mean wasted developers time
Have you tried to run tests in parallel on CI server? How to split tests across CI servers to avoid bottleneck server?
Run tests on CI servers with Knapsack Pro to ensure servers finish work at a similar time. You get the fastest CI build time!

Get faster feedback from your favourite CI server

save time & money
deliver features faster
catch errors earlier

Popular CI providers integration examples

CircleCI - Improve CircleCI parallelisation for RSpec, Minitest, Cypress
Heroku CI - How to run parallel dynos on Heroku CI to complete tests faster
Buildkite - Auto balancing 7 hours tests between 100 parallel agents
Jenkins - Jenkins Pipeline how to run parallel tests in your workflow stages
CodeShip - How to run CodeShip Parallel Test Pipelines efficiently - optimal CI parallelization
Semaphore CI - Run parallel jobs on Semaphore CI 2.0 to get faster CI build time
Travis CI - How to run Travis CI parallel jobs with build matrix feature fast
Knapsack Pro works with all CI providers because it is CI-agnostic tool - Discover all features

JavaScript test runners integration

Cypress - Run JavaScript E2E tests faster with Cypress on parallel CI nodes
Check more examples on the blog

How much can you save with faster tests on your CI?

Monthly you can save hours
and up to $
on faster development cycle.

Speed up your tests run 1 hour test suite in 2 minutes
with optimal parallelisation on your CI

Without Knapsack Pro

Run fast parallel CI build with Knapsack Pro

How it works

How to install it

Do you know

Start using Knapsack Pro

Sign up and speed up your tests.

Trusted solution

Features that make your tests perform better

Queue mode see video

Regular mode see video

Fallback mode

Auto split slow test file by test examples

Supported test runners

Problem you want to solve

Get faster feedback from your favourite CI server

Popular CI providers integration examples

JavaScript test runners integration

How much can you save with faster tests on your CI?

Introduction to CI parallelisation with Knapsack Pro

Start using Knapsack Pro

Sign up and speed up your tests.

Speed up your tests run 1 hour test suite in 2 minutes with optimal parallelisation on your CI

Without Knapsack Pro

Run fast parallel CI build with Knapsack Pro

How it works

How to install it

Do you know

Start using Knapsack Pro

Sign up and speed up your tests.

Trusted solution

Features that make your tests perform better

Queue mode see video

Regular mode see video

Fallback mode

Auto split slow test file by test examples

Supported test runners

Problem you want to solve

Get faster feedback from your favourite CI server

Popular CI providers integration examples

JavaScript test runners integration

How much can you save with faster tests on your CI?

Introduction to CI parallelisation with Knapsack Pro

Start using Knapsack Pro

Sign up and speed up your tests.

Speed up your tests run 1 hour test suite in 2 minutes
with optimal parallelisation on your CI