The verdict
For a small team that builds software and wants to start shipping, I'd pick Linear. The model is a head start, and the interface stays clean as work piles up. If you have releases, dependencies, several stakeholders, or non-software teams that need the same tool, pick Jira, and start with the free plan and only the workflow you actually use. Jira gets messy when nobody owns the configuration. Linear gets awkward when your process is unusual. If you want one tool for tasks and docs, look at Notion or ClickUp before either.