2,000,000 users · Honest comparison
Sephir vs ChatGPT for Google.
Sidebar widget that injects AI answers next to Google/Bing/DuckDuckGo SERPs. Acquired by Butterfly Effect PTD Ltd, billed via Paddle. ~2M weekly users. Below: what ChatGPT for Google users actually say, and how Sephir is built around the opposite incentives.
From ChatGPT for Google’s Chrome Web Store reviews
What real users actually said.
- “No access to ChatGPT unless Pro plan.”
- “Way too restricted for people who just want to use their own API key… advertise being able to use my own API key only to then find the extension is artificially crippled unless I pay for the Pro service.”
- “BEWARE YOUR DATA IS NOT SAFE ANYMORE!!! YOU MUST UNINSTALL. The original developer has since SOLD IT TO A PRIVATE COMPANY.”
- “I paid the subscription, but it was never activated. Many emails / tickets, Paddle says they are resellers and routing to Butterfly Effect PTD Ltd to resolve.”
How Sephir is different
Built around the opposite incentives.
- 01BYOK is first-class: your OpenAI / Anthropic / Gemini / OpenRouter key unlocks the full agent loop. No second subscription on top.
- 02Talks to providers through official APIs + ChatGPT Plus OAuth — no chatgpt.com scraping, no Cloudflare bot-check roulette.
- 03Real multi-turn agent on every site, not a SERP overlay. Frontier models the day they ship, no ads in the panel.
- 04Conversations are local-first with an audit timeline you can inspect. Lifetime price ladder — no acquisition surprise renames you into a subscription.
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.