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Castr alternatives · Webinars

Self-hosted alternatives to Castr

The Castr listing does not say it can be self-hosted. 6 of the 60 other webinar and live streaming tools in this directory can be self-hosted, according to their own sites.

Castr is a paid product with a free trial, starting at $16.67 per month, billed annually ($19.99 billed monthly). 1 of them is free or has a free plan.

6 tools · Listings checked up to Nov 13, 2026 · Where the facts come from

How each one differs from Castr

  1. Wowza

    Streaming server software you run yourself, plus a cloud platform

    • Wowza starts at $195 per month for Streaming Engine, billed monthly. Castr starts at $16.67 per month, billed annually ($19.99 billed monthly).
    • Wowza is self-hostable, according to its own site.
    • Castr also covers multistreaming.
    Wowza pricing and details

  2. Ant Media Server

    Low-latency WebRTC streaming server you run or rent by the hour

    • Ant Media Server starts at $109 per instance / month, billed annually ($129 billed monthly). Castr starts at $16.67 per month, billed annually ($19.99 billed monthly).
    • Ant Media Server is self-hostable, according to its own site.
    • Ant Media Server also covers video calls and webinars.
    • Castr also covers multistreaming.
    Ant Media Server pricing and details

  3. Red5

    Self-hosted ultra-low latency streaming server and SDKs

    • Red5 starts at $29.99 per month for 100 connections. Castr starts at $16.67 per month, billed annually ($19.99 billed monthly).
    • Red5 is self-hostable, according to its own site.
    • Red5 also covers video calls and webinars.
    • Castr also covers multistreaming.
    Red5 pricing and details

  4. Nimble Streamer

    Software media server for live and VOD streaming, billed per server

    • Nimble Streamer starts at $70 per month for one server and the required slice. Castr starts at $16.67 per month, billed annually ($19.99 billed monthly).
    • Only Nimble Streamer lists a Linux app.
    • Nimble Streamer is self-hostable, according to its own site.
    • Nimble Streamer also covers transcription and webinars.
    Nimble Streamer pricing and details

  5. VDO.Ninja

    Free browser tool for bringing remote video guests into OBS

    • VDO.Ninja is free. Castr starts at $16.67 per month, billed annually ($19.99 billed monthly).
    • VDO.Ninja has a free plan. Castr does not, though it has a free trial.
    • VDO.Ninja is self-hostable, according to its own site.
    • VDO.Ninja also covers video calls.
    VDO.Ninja pricing and details

  6. Flussonic

    Streaming media server for IPTV, CCTV and corporate video

    • Only Flussonic lists a Linux app.
    • Only Castr lists a web app.
    • Flussonic is self-hostable, according to its own site.
    • Flussonic also covers video calls and webinars.
    Flussonic pricing and details

Common questions

Is there a self-hosted alternative to Castr?

Yes. Wowza, Ant Media Server, Red5, Nimble Streamer, VDO.Ninja and Flussonic can be self-hosted, according to their own sites.

Can Castr be self-hosted?

The Castr listing does not say it can be self-hosted. The listing was checked on Oct 18, 2026 against the pages it cites.

Which of these webinar and live streaming tools are free?

VDO.Ninja is free or has a free plan.

When was this checked?

Each listing shows its own date. On this page they run from Oct 18, 2026 to Nov 13, 2026. Vendors change prices and plans without notice, so confirm on their site before you buy.

This page is built from the listings. A tool is here because its listing says so, and the order is how close each is to Castr: the alternatives its listing names first, then the tools that share the most features with it.