DarnlyBoth tools are built for AI coding agents and both close the loop: the agent reports what it fixed. Shotline is built around clients; Darnly is built around you testing your own app. Shotline's facts come from its own site, checked on 10 November 2026.
The short version
- Pick Shotline if clients review your work: they comment on a link with no install or account, and they approve fixes in a portal. It also reviews images, PDFs, video and audio.
- Pick Darnly if you find the bugs yourself, want it free with no project limit, work on localhost, or want bugs saved in your project with no account.
Side by side
| Darnly | Shotline | |
|---|---|---|
| Price | Free | Free (1 project, 1 canvas, 1 member); Pro $19 a month billed yearly |
| Who reports | You, with the extension or Mac app | Clients and guests, by link |
| Localhost | Works as is | Needs a tunnel such as ngrok |
| What a bug keeps | Screenshot with the element boxed, selector, HTML and styles, file that drew it on a local project, console errors, failed and slow requests, the steps that led there | Selector, viewport, screenshot, console errors, and where available the component path and network activity |
| Agent | Reads project files with no setup, or the MCP server; marks each bug fixed with a note | MCP server; resolves pins with a fix summary and a before and after recapture |
| Account | None, unless you use the cloud inbox | Needed for you; not for clients |
Where Shotline is the better pick
- Client work. Guests comment with nothing to install, and approve fixes. Darnly has no client portal.
- Proof. The agent's before and after screenshot is built in.
- More than web pages. Images, PDFs, video and audio.
Where Darnly is the better pick
- Free for real use. No project or canvas limit.
- Your own testing, anywhere. One key in your normal browser, localhost and logged-in pages included, plus a Mac app for native apps and simulators.
- The steps and the scope. Each bug keeps what you did before it, and "Change only this one" or "Change all like it" tells the agent how far to go.
See every option side by side in the best bug reporting tools for AI coding agents, or add Darnly to Chrome.