Docs + lightweight task tracker
Notion is a flexible docs and database tool that a lot of small teams stretch into being their task tracker too.
Notion is extremely flexible — you can build a task board, a wiki, and a roadmap all in the same connected workspace, which is appealing for small teams that don't want five separate tools.
Notion has essentially no native git integration. Tracking which branch or PR belongs to which Notion task is entirely manual, and there's no equivalent to Jira's ticket-transition API that a tool like Jitly could even hook into.
This is really the whole reason Jitly exists — it's not trying to replace Notion at what Notion is good at. Jitly's job is narrower and more specific: jitly start ABC-123 creates your branch and moves the Jira ticket to In Progress in one shot, jitly done commits, pushes, and updates the status to whatever your team's workflow has, fetched live so it never gets out of sync with how your Jira is actually configured.
Mainly very small teams or early-stage startups using Notion for everything before they've adopted a dedicated tracker. If that's not you, this comparison probably isn't that relevant to your day — Notion and Jitly solve different problems most of the time.