1,000,000 users · Honest comparison
Sephir vs Merlin.
AI sidebar by Foyer Tech (Ctrl+M hotkey) bundling GPT-4o, Claude, Gemini behind a credit-metered plan. ~1M weekly users. Below: what Merlin users actually say, and how Sephir is built around the opposite incentives.
From Merlin’s Chrome Web Store reviews
What real users actually said.
- “I have a lifetime license via AppSumo and highly recommend you do not install this extension. It now injects annoying 'charitable' ads from a service called Give Freely.”
- “They've started limiting their PRO users so that it's no longer unlimited. False advertising.”
- “Pure garbage. My browser RAM / memory usage has increased significantly due to this extension. It is possible this extension is running a load of malware in the background.”
- “Not working. Can't delete account.”
How Sephir is different
Built around the opposite incentives.
- 01Sephir never injects overlays, affiliate popups, or ads — paid or free. Your tab is yours.
- 02Lifetime price ladder, no credits to ration. Your own API key or ChatGPT Plus OAuth handles the metering.
- 03Local-first conversations + transparent telemetry. Nothing to harvest, no hidden background work.
- 04One-endpoint account deletion. Refund button on the account page — not a support ticket.
Try it free
The agent layer for the browser, without the auto-renew.
Free tier covers BYOK + single-turn chat. Pro Lifetime unlocks the agent loop, $39 for the first 500 buyers, one-time payment.