Bonfire Terminal vs Merlin
Merlin is a hybrid AI browser assistant with over a million users, freemium up to $19/mo across OpenAI, Anthropic, Google, and Llama, though it marks up keys. Bonfire Terminal is a sovereign on-device agent instead: nothing leaves the device, your own key billed at cost with no markup, and one perpetual license.
Bonfire Terminal vs Merlin: the 16-factor comparison
| Rating factor | Merlin | Bonfire Terminal |
|---|---|---|
| Category | LLM Chat UI | AI Terminal / Local Agent |
| Popularity | ~1M+ users | Growing · indie |
| Hosting architecture | Hybrid | On-Device Local |
| Licensing model | Freemium | One-Time Perpetual |
| Data / training policy | Not disclosed | Fully local — nothing leaves device |
| Offline capability | No | Yes |
| Pricing tier range | $0-$19/mo | One-time license |
| Execution unit cost | Subscription | Unlimited Local Compute |
| API-key markup | Yes | No — BYO key at cost |
| Supported LLM providers | OpenAI;Anthropic;Google;Meta/Llama | OpenAI; Anthropic; Google; Local; Any |
| Auth / permission types | OAuth;Username-Password | API Key; Local/None |
| Phone / messaging bridges | None | Telegram; WhatsApp |
| Speech recognition engine | Partial | Whisper (local) |
| Local media processing | Partial | Yes |
| Sovereign score | 48 / 100 | 93 / 100 |
The sovereignty gap
Where Merlin lands on each weighted pillar (its bar) — the red marker is Bonfire's score. Auto-derived from the 16 factors above.
Which should you choose?
Choose Merlin if…
Choose Merlin if you want a versatile browser assistant for chatting, summarizing, and writing across the web with access to many models.
Choose Bonfire Terminal if…
Choose Bonfire Terminal if you want an on-device agent you own outright, with keys at cost and no markup, not tied to the browser.
Bonfire Terminal vs Merlin: FAQ
Is Merlin private?
Merlin's training policy is unstated, and it is a hybrid browser assistant, so your prompts and page data often reach its servers. Bonfire Terminal runs on-device, so your data never leaves your machine.
Is Bonfire Terminal cheaper than Merlin?
Merlin subscribes from free to $19/mo and marks up keys. Bonfire Terminal is a one-time perpetual license with bring-your-own key billed at cost and no markup, so it avoids recurring fees and inflated token prices.
Can Bonfire Terminal replace Merlin?
Largely. Both are multi-model AI assistants. Bonfire runs on-device with a perpetual license and no markup. If you specifically want Merlin's in-browser overlay across websites, that extension experience differs from Bonfire's local agent approach.
What can Bonfire Terminal do that Merlin can't?
Bonfire runs fully on-device with keys at cost and adds Telegram and WhatsApp bridges, local Whisper speech recognition, and full local media processing. Merlin is a hybrid extension that marks up keys and offers only partial local media handling.
How do I switch from Merlin to Bonfire Terminal?
Install Bonfire Terminal, add your own key for any provider, and recreate the chat, summary, and writing prompts you used in Merlin as local on-device agents rather than a browser extension.
Does Bonfire Terminal work offline vs Merlin?
Merlin is a hybrid extension with no real offline capability. Bonfire Terminal runs on-device, so Whisper transcription and local media processing work offline; LLM calls need connectivity but route directly to your own provider key.