Comparison
CapyBro vs Slashit App
Both bring AI to your text on a hotkey. CapyBro is open-source, free, and supports local AI — Slashit is none of those.
Slashit App is a well-marketed AppSumo lifetime deal that adds AI rewrites to Windows, Mac, and the browser. CapyBro is a free, open-source MIT-licensed alternative that works only on Windows today (Mac is in the roadmap), supports local AI via Ollama, and ships with three UI languages instead of one.
Side-by-side at a glance
| Feature | CapyBro | Slashit App |
|---|---|---|
| Pricing | Free + $19 one-time Pro | AppSumo lifetime deal ($59-89) |
| Platforms | Windows (Mac in roadmap) | Windows, Mac, browser |
| Open source | Yes (MIT) | No |
| Local AI mode | Yes, via Ollama | No, cloud only |
| Multi-provider AI | OpenRouter + Ollama (GPT/Claude/Gemini/+) | Built-in (limited transparency) |
| UI languages | English, Ukrainian, Russian | Mostly English |
| Custom prompts | Unlimited | Predefined + some customization |
| Long-term durability | MIT, anyone can fork | Depends on AppSumo deal continuity |
The full story
Why AppSumo lifetime deals are a gamble
Slashit's value is "pay $89 once, get lifetime access." The risk: lifetime deals have a history of companies sunsetting features for legacy users, degrading service to push paid upgrades, or going under entirely (AppSumo then keeps complaints alive but updates stop). With CapyBro, the MIT-licensed core means if I disappear tomorrow, the code stays on GitHub forever and anyone can fork.
Cross-platform: Slashit wins today
Honest disclosure: Slashit supports Mac and browser, CapyBro is Windows-only at the moment. A Mac port via Avalonia is on the roadmap (~2 months of work). If you're on Mac and need this functionality now, Slashit is the right pick. If you're on Windows or willing to wait, CapyBro will be cheaper, open-source, and more transparent.
Privacy: CapyBro wins decisively
Slashit's privacy policy is vague about what happens to your text on their backend — they could log it, store it, or pass it to OpenAI under their account. CapyBro is fully transparent: cloud mode goes directly to OpenRouter (you choose the provider, read their policy yourself); local mode goes to nothing — open the code and verify.
Custom prompts: CapyBro deeper
Slashit gives you predefined transforms plus some customization. CapyBro is completely user-managed: name your prompt, bind a model to it (cheap fast model for simple grammar, stronger one for translations), reorder them, and get Prompt Packs in Pro for ready-made bundles aimed at legal/marketing/dev use cases.
Who should pick which
Common questions
Is Slashit App a bad product?
No, it's a competent product with a different design philosophy. CapyBro just prioritizes open-source, transparency, and local AI — Slashit prioritizes cross-platform reach and zero-config UX.
When will CapyBro support macOS?
Roadmap target is ~2 months of work via an Avalonia rewrite. Linux support after that. Follow GitHub releases for status.
Why not match Slashit's lifetime deal?
Considering it. CapyBro's $19 one-time Pro is already close to lifetime-deal pricing — you just buy direct from the maker via Gumroad instead of through AppSumo.
Can I read the code first before installing?
Yes, the full source is at github.com/phantasmat2018/capy-bro. No part of the Free tier is closed.
Try the open-source alternative
If you value open-source, local AI, or you're skeptical of AppSumo lifetime deals — CapyBro is the answer. Free download, MIT-licensed, ~50 MB.