What does “lifetime” mean exactly?

One payment, every future update to Sephir included, forever. No major-version fee.

Can I cancel and get a refund?

Nothing recurring to cancel. Refund within 30 days through the Polar portal — no email thread.

Every multi-AI sidebar runs one and most users complain about auto-renew traps. Lifetime keeps the incentives honest.

Pricing

One payment. Then it’s yours.

No monthly fee, no auto-renew, no token reselling. Free covers the chat surface — Pro unlocks the agent loop, tools, and skills. BYOK is never paywalled.

Free

$0forever

No account required. Install and you’re in.

BYOK across OpenAI, Anthropic, Gemini, Mistral, OpenRouter
Sign in with ChatGPT Plus (Codex OAuth) — no extra subscription
Single-turn chat in any tab
Selection popover · page summarize · ask-about-PDF
Conversation history stored locally on your device
Read-only audit log of your own conversations
Cross-surface handoff between popover and sidebar

Install for Chrome

Pro · Lifetime

$39$99one-time

Limited early-adopter seats — first 100 only.

Pay once. All future Sephir updates included, forever.

Everything in Free, plus:
Multi-turn agent loop (pi-agent-core under the hood)
Real tool surface: extractPageText, openTab, click, fill, snapshot, web-search, and 18 more
Schema-aware structured extraction
Saved skills — named tool-use workflows
Conversation export to Markdown / JSON
Full audit timeline with token + cost per turn
Optional encrypted cloud sync when it ships — included in your lifetime licence
7-day trial, no credit card required

Start 7-day trial

Refund within 30 days · Lifetime means lifetime

If Sephir ever launches its own hosted AI, it ships as a separate, opt-in usage subscription. Your lifetime licence is for the agent surface — not for inference we host.

What you don’t get

Three things Pro doesn’t buy you.

A second AI subscription
Sephir uses your existing ChatGPT Plus, Claude Pro, or any API key you bring. We don't run inference and don't resell tokens.
Team / org seats — yet
Multi-seat licences and shared skills are on the roadmap. Single-user is what's on offer today.
Cloud sync today
Conversation history is local-first. If we ship optional encrypted sync, it stays opt-in with per-install keys — and your lifetime licence covers it when it lands.

Our pricing promises

Six commitments, shipped inside the product.

01One-time payment. Nothing recurring to forget about.
02Refund button on the main settings page — one click, no support thread.
03Refund window: 30 days. Polar handles the portal, we honor it.
04Lifetime means lifetime — every future update included.
05If we ever ship our own AI, it's a separate opt-in usage subscription.
06BYOK is never gated. Free tier always carries the full provider list.

These aren’t taglines — they’re the buttons we ship inside the product. Cancel, refund, and BYOK are all one click, never behind a support email.

Quick questions

The three you’re probably about to ask.

What does “lifetime” mean exactly?: One payment, every future update to Sephir included, forever. No major-version fee.
Can I cancel and get a refund?: Nothing recurring to cancel. Refund within 30 days through the Polar portal — no email thread.
Why no monthly plan?: Every multi-AI sidebar runs one and most users complain about auto-renew traps. Lifetime keeps the incentives honest.

Lock in the $39 seat.

Trial first, decide in seven days, keep the licence for life.

Start 7-day trial Install Free first