700,000 users · Honest comparison
Sephir vs MaxAI.
Universal AI sidebar with right-click context menu. ~700K weekly users. Below: what MaxAI users actually say, and how Sephir is built around the opposite incentives.
From MaxAI’s Chrome Web Store reviews
What real users actually said.
- “There is no option to cancel… Clicking on 'Your plan' and 'compare plan' only produces this same page.”
- “Predatory billing… Charged two years in a row for an unused annual subscription with no renewal warning.”
- “Says in the product description that you can add your own OpenAI API key — you can't.”
- “This app will automatically deduct money, so please be cautious.”
How Sephir is different
Built around the opposite incentives.
- 01Nothing recurring to cancel. Refund within 30 days through the Polar portal.
- 02BYOK is the primary onboarding flow — not a buried hidden feature.
- 03ChatGPT Plus OAuth runs over your existing subscription. $0 in tokens.
- 04Lifetime price ladder ($39 → $79 → $99). Price stays where it was on the day you bought.
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.