Knapsack Pro

Drone vs Heroku CI comparison of Continuous Integration servers
What are the differences between Drone and Heroku CI?

Drone

https://drone.io

Heroku CI

https://www.heroku.com/continuous-integration
Unique feature

Customization

Heroku Flow

Type of product

SaaS / On Premise

SaaS

Offers a free plan

Yes

The cloud version is free for open source projects. Also offers a free plan for any project, with a limit of 5000 builds per year. The on-premise version is available as a Docker image.

No (partial)

For CI only, the cost starts at $10 for pipeline, plus a variable amount depending on how long the build runs for (prorated per second). The servers used for CI cost $250 for a full month, which means you get about 3 hours for $1. For hosting, there's a free tier, limited to 1 web/1 worker with 512 MB RAM. One of the more annoying limitations is that free dynos are put into sleep mode after 30 min. of inactivity, which increases loading times considerably.

Predictable pricing

Yes

Predictable pricing based on number of users and repositories. They have a calculator to help determine cost.

Yes

Clearly defined, offers a calculator.

Support / SLA

N/A

It's not clear what their support commitment is. They have a fairly active community on Discourse, for community support.

Yes

Paralellism
Every CI servers tends to address this differently (parallel, distributed, build matrix). Some of it is just marketing, and some is just nuance. For this table, parallel means that tasks can be run concurrently on the same machine, distributed means that tasks can be scaled horizontally, on multiple machines
How to split tests in parallel in the optimal way with Knapsack Pro

Yes

Pipeline task configuration allows running tasks in parallel

Yes

Up to 16 nodes. You can ask Heroku support to enable up to 32 parallel dynos.

Distributed builds
distributed means that tasks can be scaled horizontally, on multiple machines
How to split tests in parallel in the optimal way with Knapsack Pro

Yes

Pipelines can be configured to run on multiple machines, although they recommend that to be an option only if paralellizing tasks and scaling vertically doesn't suffice. They even support multi-platform distribution (ie: running tasks on various operating systems)

N/A

Containers support / Build environment

Yes

By default, they offer Docker support for the CI/CD job runners.

Yes

Builds run in isolation on new dynos (Heroku containers). Wide support via buildpacks: https://devcenter.heroku.com/articles/buildpacks

Analytics / Status overview
Analytics and overview referrs to the ability to, at a glance, see what's breaking (be it a certain task, or the build for a specific project)

Yes

Yes

Great visual overview built-in.

Management support
How easy is it to manage users / projects / assign roles and permissions and so on

Yes

They offer in-depth documentation for user and server management. A lot of it can be done via the drone CLI tool, which seems to be the focal point of the docs.

Yes

One of the more mature solutions for teams on the market, Heroku Teams is available for free for 1-5 people, and comes at a cost for 6+ team members: https://www.heroku.com/pricing#team-comparison. Allows setting roles and app-level permissions with ease.

Self-hosted option

Yes

No

Hosted plans / SaaS

Yes

Yes

Build pipelines
A continuous delivery pipeline is a description of the process that the software goes through from a new code commit, through testing and other statical analysis steps all the way to the end-users of the product.

Yes

Easily configurable pipelines via YML files.

Yes

Very easy and intuitive process that allows defining a pipeline from code commit, to code review (review apps), user acceptance testing and production deployment, via Heroku Flow. Works best if the project is also hosted on Heroku.

Reports
Reports are about the abilty to see specific reports (like code coverage or custom ones), but not necesarily tied in into a larger dashboard.

N/A

Yes

Ecosystem
Besides the official documentation and software, is there a large community using this product? Are there any community-driven tools / plugins that you can use?

Yes

Drone CI allows integrating plugins into the CI/CD process. They have a list of available community plugins and provide documentation on building your own. Plugins are Docker containers which plug directly into the CI/CD process.

Yes

Wide array of 3rd party add-ons available via Heroku Elements: https://elements.heroku.com/addons. Custom buildpacks are also available for almost any stack you might be using (over 5500 buildpacks available at the moment)

Specific language support: Ruby
Some CI servers have built-in support for parsing RSpec or Istanbul output for example and we mention those. Some others make it even easier by detecting Gemfiles or package.json and automate parts of the process for the developer.

No (partial)

No specific support, but they do provide sufficient documentation on getting a Ruby project up and running, including a multi-platform example.

Yes

Although not specifically built in to Heroku, it's guaranteed that any Ruby specific need that might arise would be solved via add-ons, buildpacks or other integrations available.

Specific language support: JavaScript

No (partial)

No specific 1st party support, but the plugin marketplace features an NPM authoring and an NPM authentication plugin.

Yes

Although not specifically built in to Heroku, it's guaranteed that any Javascript specific need that might arise would be solved via add-ons, buildpacks or other integrations available.

Integrations
1st party support for common tools (like Slack notifications, various VCS platforms, etc)

Yes

Integrates well with source code management platforms (1st party support for GitHub, GitLab, BitBucket) as well as other systems via 3rd party plugins.

Yes

The strongest built-in integrations are with GitHub and Slack (ChatOps) but even allows integrating 3rd party CI servers in the workflow if you so require, among others.

API
Custom integreation is available, via an API or otherwise, it's mentioned separately as it allows further customization than any of the Ecosystem/Integration options

Yes

Drone provides a feature-rich REST API, as well as an official Go SDK for it.

Yes

Offers a feature rich API that allows CRUD operations on the most important features, such as promoting an app to production, or inspecting a specific pipeline.

Auditing

Yes

Yes

Additional notes

The fact that Drone works with any source code manager, as well as the fact that it can run tasks on multiple platforms makes it stand out from the rest. Very nifty!

How to leverage Heroku CI to run your tests faster?

Introduction to Knapsack Pro Heroku add-on

Heroku CI parallelism integration

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