Video calls · checked 2026-10-19Can I vibecode Demio?
KINDA· weekend project
A webinar for a few dozen people is a registration page, a video room, a chat and a recording, and with LiveKit's open-source server an agent gets a working room in a weekend. The gaps are the parts attendees judge you on: video that holds up on bad networks, a room that stays up when hundreds join, reminders that reach the inbox and a replay pipeline that doesn't fail. Rehearsals matter more than code here.
$63/moprice
$756you'd save a year
weekendbuild time
—people replaced it
What you need on hand.
DifficultyAdvanced · Real infrastructure or OAuth work.
TimeA weekend, plus a rehearsal before going live
- Claude Code, Codex or CursorAny of them can run the prompt.
- Node.js 22better-sqlite3 compiles a native module, so build tools must be installed.
- DockerRuns LiveKit and its egress service for recordings.
- A VPS with a public IPOpen the UDP range LiveKit documents; a home connection behind NAT won't serve strangers well.
- SMTP credentials and a domain with HTTPSBrowsers only allow camera and mic on secure pages.
Before you buildDemio has no free plan, only a 14-day trial limited to 20 attendees and 1-hour sessions. If you only need a group call, Jitsi Meet is free.
- 1. Install one agent: Claude Code, Codex, Cursor.
- 2. Make an empty folder and open it in the agent.
- 3. Paste the prompt below, press enter, and answer its questions as it builds.
The prompt
Build me a small webinar room to replace Demio. Requirements: - Node.js 22 + TypeScript: a Fastify server, server-rendered pages (Eta) and the LiveKit JavaScript client in the browser. `npm start` serves http://localhost:4950 with /e/<slug> (register), /live/<slug> (room), /replay/<slug> and /admin. - Media: a LiveKit server from docker compose (`livekit/livekit-server`, keys in .env) or a LiveKit Cloud project. The Fastify server mints join tokens with `livekit-server-sdk`: attendees may only subscribe, presenters (up to four, each with their own link) may publish camera, mic and screen. - Storage: better-sqlite3 in ./data/webinars.db: events (title, start time, timezone, room cap), registrants (name, email, unique join token, UTM source), chat messages, poll votes and attendance (joined, left). - Registration: a form that saves the registrant, sends a confirmation with an .ics file, then reminders 24 hours and 15 minutes before, through nodemailer SMTP from .env. A join link works only for that event's registrants. Refuse registrations beyond the room cap and show "room full" instead of a broken room. - Room: video stage, attendee chat with a moderator view for presenters, a questions queue, and polls the presenter launches mid-session with live result bars. - Recording: LiveKit Egress (room composite) to ./data/recordings/<slug>.mp4. The replay page serves it to registrants, with an on/off switch per event. - Admin: one password in .env; event list; CSV export of registrants and attendance in minutes. - Single user. No accounts, no telemetry, local-first. Outbound calls: SMTP and your LiveKit server only. - Out of scope: automated evergreen webinars, CRM integrations, restreaming, live captions, payments. - README: ports and the UDP range to open, TURN and HTTPS on a VPS, and a warning to rehearse with a handful of real browsers on different networks before the first live event.
Opens your agent with the prompt filled in, you press enter. Or copy it and paste it into an empty folder.
Then keep going
Next prompts, same folder.
The first prompt builds the core. Run these one at a time in the same folder to grow it into your own Demio.
Add automated webinars to the webinar room in this folder. Requirements: - An event can be marked "automated": pick a recording and a weekly schedule such as Tuesday and Thursday 10:00 in the registrant's timezone. - At the session time, /live/<slug> plays the recording to everyone present, synchronised to the server clock so late joiners start where the others are. - Chat stays on; the presenter's replies come from a list of timed messages I write in the admin. - Registrants can pick the next session from a dropdown on the registration page. - Update the README.
Add post-event emails to the webinar room in this folder. Requirements: - One hour after an event ends, send attendees a thank-you with the replay link and no-shows an "in case you missed it" email, using templates I edit in the admin. - Segment by attendance minutes: under 5 minutes counts as a no-show. - Log every send in SQLite and never send the same email twice to a person for one event. - A dry-run flag that prints the recipients without sending. - Update the README.
Add a HubSpot export to the webinar room in this folder. Requirements: - A private-app token in .env (HUBSPOT_TOKEN). After each event, create or update a contact per registrant by email through the HubSpot API. - Write the event title, registration source, attended yes/no and minutes watched to custom contact properties, creating the properties on first run. - Retry on rate limits with exponential backoff and record failures in SQLite. - Update the README with the scopes the token needs.
What you lose
- Rooms of 500 to 3,000 attendees with consistent quality
- Automated and on-demand webinars that run on a schedule without you
- HubSpot, Salesforce, Marketo and Pardot sync for registrants and attendance
- Engagement analytics, live captions, restreaming and the AI chat assistant
- The no-download join experience that has been tested on many browsers and networks
Why people still pay
Marketing teams run webinars as a lead source, so a broken live room costs far more than the subscription. Demio gives attendees a link with no download, gives hosts a tested room, and pushes registrants and attendance to the CRM afterwards.
Demio or your own copy?
Over
Your usage
12h ×$/h
Demio, 1 yr$756
Your own copy, 1 yr$280running + build session
You keep$476pays for itself in the first month
Estimate · A small VPS runs a room for a few dozen people; video bandwidth is the real cost and grows with audience size and session length, so treat these as a rough range. The build is token usage on your agent plan.
Take your data, then cancel.
1 · Take your data out of Demio
- 1Registrants and attendees: open the event's Activity section, go to the Registrants tab and click Export CSV. Large exports are emailed as a CSV or ZIP.
- 2Polls, handouts and featured actions: use the Insights tab and click Export; each downloads as a CSV straight away.
- 3Chat messages, questions and summaries are processed in the background and arrive by email as a ZIP of CSVs.
- 4Recordings: the best-practices article says you can download a recording and re-upload it elsewhere; the data-export article doesn't cover recordings, so download each one while the account is active.
2 · Cancel Demio
- 1Open the drop-down next to your account name, then Settings and the Billing tab, and start the cancellation at the bottom (labelled Cancel Your Account or Start Cancellation).
- 2Answer the follow-up questions and confirm. You keep access until the end of the paid billing period.
- 3Changed your mind? Use Stop upcoming cancellation on the Billing tab before the period ends.
- 4Premium and Unlimited plans can't be cancelled this way: contact Customer Success, with 30 days' notice.
- The account is deactivated at the end of the period and its data is erased 30 days later, so export first.
- Each export can be requested once every 24 hours, and the emailed link expires after 48 hours.
- Cancel the Boost add-on separately if you started its trial; it begins a paid term after 14 days.
- The help articles don't cover refunds; ask support if you cancel mid-term.
The escape hatch
Don't feel like building it? These are already free.
Jitsi MeetOpen sourceApache-2.0 video conferencing with a Docker self-host; good for meetings and small groups, with no registration pages or webinar analytics.★ 30k · active Oct 2026 · docker to self-host
Web, Android, iOSVisit ↗BigBlueButtonOpen sourceLGPL-3.0 web conferencing built for classes, with polls, breakout rooms, shared notes and recordings; it expects a dedicated server.★ 9.2k · active Oct 2026 · self-host, real ops
WebVisit ↗OwncastOpen sourceMIT self-hosted live streaming with a built-in chat; you stream in from OBS, so it is one-way broadcast with no audience on stage.★ 12k · active Oct 2026 · docker to self-host
WebVisit ↗
Web, Android, iOSVisit ↗BigBlueButtonOpen sourceLGPL-3.0 web conferencing built for classes, with polls, breakout rooms, shared notes and recordings; it expects a dedicated server.★ 9.2k · active Oct 2026 · self-host, real ops
WebVisit ↗OwncastOpen sourceMIT self-hosted live streaming with a built-in chat; you stream in from OBS, so it is one-way broadcast with no audience on stage.★ 12k · active Oct 2026 · docker to self-host
WebVisit ↗
The numbers
Demio pricing
| Plan | Monthly | Annual, per month | What you get |
|---|---|---|---|
| Starter | $63 | $45 | One host, 50-attendee room, 3-hour sessions, 4 people on stage, 15 event admins; chat, polls, featured actions, handouts, engagement analytics and live event series. |
| Growth | $117 | $80 | Rooms of 150, 500, 1,000 or 3,000 attendees, 8-hour sessions, 6 on stage, 25 event admins; adds on-demand and automated webinars, custom room and email branding, custom form fields, source tracking and Showcase. |
| Premium | — | $196 | Rooms of 150 to 3,000, 10-hour sessions, 10 on stage, 50 event admins, unlimited hosts; adds 1080p, restreaming, live captions, custom domains, auto-transcriptions, HubSpot, Salesforce, Marketo and Pardot integrations, Demio AI, a dedicated CSM and priority support. |
| Larger rooms and SSO | custom | — | Rooms beyond 3,000 attendees and single sign-on. |
- Free tier
- No free plan. The 14-day trial has Growth features but only 20 attendees and 1-hour sessions.
- Billing
- Monthly or annual per host, in USD; the page advertises about 30% off for annual. Starter and Growth upgrades apply at once and downgrades at the end of the billing cycle; Premium changes need 30 days' notice. Subscriptions renew automatically; you can request cancellation at any time and the account is deactivated at the end of the billing period.
- Hidden costs
- A host is needed per simultaneous event, so two live events at once mean two hosts. The Boost add-on starts a paid term automatically after its 14-day trial. Zapier setup support is $150 extra and concierge onboarding is a paid service. Bigger attendee rooms cost more than the entry prices shown.
- Source
- www.demio.com
Also on the list
Related apps
Kinda. The core is a weekend build with the prompt on this page, but real gaps remain: Rooms of 500 to 3,000 attendees with consistent quality, Automated and on-demand webinars that run on a schedule without you.
About $63 a month on the Starter, 50 attendees, one host plan, $756 a year (checked 2026-10-19).
Rooms of 500 to 3,000 attendees with consistent quality; Automated and on-demand webinars that run on a schedule without you; HubSpot, Salesforce, Marketo and Pardot sync for registrants and attendance; Engagement analytics, live captions, restreaming and the AI chat assistant; The no-download join experience that has been tested on many browsers and networks. If any of those matter to you, keep paying.
Yes: Jitsi Meet (open source), BigBlueButton (open source), Owncast (open source).