# Sephir

> The agent layer for the browser. A multi-turn AI agent in every tab, powered by your own ChatGPT, Claude, Gemini, or OpenRouter subscription. Local-first conversations. One-time lifetime payment.

Sephir is a Chrome and Firefox extension plus companion dashboard built by the team behind the original ChatGPT File Uploader (120,000 installs, 2023). The pivot: instead of being a single file-picker, the file-uploader DNA became one tool the agent can call. The new surface is a full multi-turn agent loop with a saved-skill library, audit timeline per conversation, and cross-surface handoff between popover and side panel.

Two tiers: Free (BYOK + single-turn chat, no account required) and Pro Lifetime — $39 for the first 500 buyers, $79 standard, $99 final. No subscription. Working refund button via Polar. Conversations live in browser local storage, never on our servers.

## Product
- [Homepage](https://sephir.app/): Positioning, five-pillar manifesto, founder story
- [Pricing](https://sephir.app/pricing): Free vs Pro Lifetime, ladder, refund policy, FAQ
- [Alternatives hub](https://sephir.app/alternatives): One-page index of every competitor comparison

## Competitor comparisons
- [vs Monica](https://sephir.app/vs/monica): 3M weekly users, proprietary credit pool, BYOK lies
- [vs Sider](https://sephir.app/vs/sider): 5M users, "no free version" deception, daily caps
- [vs MaxAI](https://sephir.app/vs/maxai): 700K users, cancel trap, surprise charges
- [vs AITOPIA](https://sephir.app/vs/aitopia): 1M+ users, silent auto-renew, ChatGPT page hijacking

## Roles
- [For developers](https://sephir.app/for/developers): Multi-tab agent, BYO subscription, saved skills, exportable audit
- [For researchers](https://sephir.app/for/researchers): Synthesis across tabs, citation-friendly output
- [For writers](https://sephir.app/for/writers): Tone-anchor skills, page-aware editing
- [For students](https://sephir.app/for/students): Cross-tab study with explicit-citation prompts

## Trust
- [Privacy policy](https://sephir.app/privacy-policy): Local-first commitment, telemetry opt-in payload list
- [Terms of service](https://sephir.app/terms-and-conditions): Lifetime licence terms
- [Refund policy](https://sephir.app/refund-policy): 30-day no-questions refund via Polar portal

## Discovery
- [Sitemap](https://sephir.app/sitemap.xml): Full URL index
- [Robots](https://sephir.app/robots.txt): Crawler directives and Content-Signal preferences

## Five pillars

1. **Real agent loop** — multi-turn, tool-calling, audit-by-default. Not a single-turn chat wrapper around someone else's tokens.
2. **Bring your own everything** — OpenAI key, Anthropic key, ChatGPT Plus via Codex OAuth, local Ollama. We never resell tokens.
3. **Every interaction is a saved conversation** — see what the AI did, when, with which tools, what it cost. Token spend per provider, exact.
4. **Local-first, maintained, drift-resistant** — conversations and keys in browser local storage. 48-hour update SLA after every host (ChatGPT, Claude, Gemini) UI change.
5. **One-time price, working cancel button** — $39 / $79 / $99 ladder. No auto-renew, refund button on the account page, lifetime includes every future update.