# Open source Ruby gem with paid pro version

Maintains a free open source gem for running test suites in parallel and sells a paid pro version of it. Revenue comes from pro subscriptions.

| Tag | Value | Confidence |
|---|---|---|
| Category | Software and apps | 89% |
| Earns from | Subscriptions | 95% |
| Startup cost (estimate) | Under $100 | 49% (low) |
| Time (estimate) | Part-time | 52% (low) |
| Where | Online | 99% |
| Coding | Needs coding | 98% |

Source: [Ask HN: What are your passive income sources?](https://news.ycombinator.com/item?id=12801570), Hacker News, ArturT, 2016-10-26
Page: https://allsidehustleideas.com/ideas/open-source-ruby-gem-with-paid-pro-version-8803f5

## About this data

- Sources are public, first-person accounts: interviews, podcasts and community threads.
- Cost, time and the other tags are machine estimates, each with a confidence score.
- Income figures are the owner's own claim. We don't verify them.
- Link the idea page and its source. Call income figures the owner's unverified claim, and cost and time estimates.