DeckIn
Self-hosted Docsend, operated by your agent.
What it is
DeckIn is an email-gated PDF viewer you self-host.
It captures who opens your deck, where they are, and how long they spend on each slide. No subscription, no per-deck fees, no third party with your data.
There is no dashboard. Your interface is the agent you already work with in Cursor, Claude, or Codex. Ask it who opened your deck. Ask it which slide lost them. It queries your database and tells you.
Get started
Install with your agent.
Paste into Claude Code, Cursor, or Codex.
Set up DeckIn following the instructions at https://github.com/dmonsef/deckin/blob/main/SETUP-DECKIN.md~10 minutes · Vercel + Supabase free tiers
What you get
Re-gate on forward
If your link gets forwarded, the new viewer goes through the gate. You capture every opener.
Slide-level attention
Time per slide, split by active vs. backgrounded. See exactly where people slow down or drop off.
Rich session data
Email, location, referrer, and user agent per session. Enough to know who, where, and how they arrived.
Agent-queryable
No dashboard to build or maintain. Ask your AI agent for stats. Set a scheduled task for daily summaries.
Self-hosted data
Everything stays in your Supabase project. No third-party subscription, no per-deck fees.
Small footprint
Next.js, Supabase, and Vercel. Free tiers cover most installs. About 600 lines of code.
The category
“SaaS applications, or biz apps — the notion that business applications exist, that will probably collapse in the agent era.”
Software as an Agent. Read the essay →
SaaA is software designed to be operated by an agent rather than a human.
Want stats? Ask your agent. Want to delete a viewer? Ask your agent. Want a daily summary emailed to you? Set up a scheduled task.
DeckIn is SaaA for sending pitch decks.
Built by
Darius A Monsef IV
@bubs
3x YC Founder. 2 exits. Built Creative Market (acquired by Autodesk, 2014) and Sightbox (acquired by J&J, 2017).
DeckIn started as my own tool. Sharing it as open source.