Scheduling and meetings decision
Demio
A single-capable developer can implement a narrow self-hosted webinar workflow (registration, streaming, chat, polls, recording) over several weeks, but reproducing Demio’s scale, polish, integrations, and AI features would be costly and operationally heavy—so building a minimal in-house substitute is realistic, but replacing the full paid product is not.
Visit website↗$63/mo
$756/yr
Per seat. Read off the official pricing page.
$100one-off80 h to build
$200/mo20 h/mo upkeep
On cash alone, building overtakes the subscription at 4 seats.
No open-source build does this yet
Nothing published replaces this one, so a replacement starts from an empty file. Here is what it would have to cover.
What a replacement has to do
- Host a webinar: register attendees → stream audio/video to attendees → provide chat/Q&A/polls/handouts → record session and surface post-event analytics and attendee engagement
What it still won’t have
- Highly polished, production-ready UI and UX
- Built-in scale and global low-latency streaming
- Enterprise integrations and dedicated account support
- Demio AI features and other proprietary add-ons
- Restreaming, advanced analytics, and turnkey reliability
What remains hard
- Product polish and ongoing maintenance
First-year cost
Keep paying
Paying is—cheaper in year one.
On cash alone, building overtakes the subscription at 4 seats.
Money you would actually spend
Time you would spend
—
What you would spend
What we assumed
The verdict above measures whether you could build it. This one is only about money.
Runnable build prompt
Build a minimal self-hosted webinar service using: React frontend, Node.js (Express) backend, Postgres for data, Redis for pub/sub, S3-compatible storage, and a managed WebRTC/SFU provider (or Daily.co/Twilio) for streaming. In scope: attendee registration pages with email confirmations, one-host live webinar room with WebRTC streaming, real-time chat/Q&A via WebSockets, polls and downloadable handouts, server-side recording to S3 and automatic transcription (use a speech-to-text API), basic engagement analytics (events stored in Postgres) and an admin page to start/stop events. Out of scope: multi-room horizontal scaling, enterprise SSO, advanced integrations, and mobile native apps. Include error handling for failed uploads/streams, tests for registration, chat, and recording flows, and deployment scripts (Docker + Terraform) for a single-region setup.
How we checked
How the score was reached
- Partly verdict base52
- 3 cited sources+3
- Price verified on pricing page+3
- Evidence score58
The base comes from the verdict. Everything under it is a check that either happened or did not, and each one is a fact frozen in this record rather than a judgement made at render time - so the same evidence always produces the same number.
How scoring works →Cited sources · 3
Every page the run actually retrieved.
- official productDemio - Hassle-free Webinar Software for Marketers
- official pricingPricing | Demio
- official docsEngagement Features — Demio
Integrity checks
What held up, and what did not.
