Ant Media Server vs Castr Comparison 2026
Ant Media Server is infrastructure a developer runs to get sub-second latency into their own product, licensed by the instance from $0.24 an hour. Castr is a hosting and paywall layer for a business running scheduled channels: live-to-VOD, a 24/7 playout loop and pay-per-view, from $19.99 a month with a 7-day trial that needs no card. Neither is really a substitute for the other. One is for building streaming into a product you write; the other is for running a channel that needs to get paid.
Sub-second streaming you run yourself
Live streaming with hosting and a paywall
At a glance
- Castr starts cheaper, at $19.99.
- Neither has a free tier.
Side by side
Ant Media Server | Castr | |
|---|---|---|
| Starting price (they differ) | From $109 | From $19.99 |
| Pricing model | Paid subscription | Paid subscription |
| Free tier | No | No |
| Billing | Monthly or annual | Monthly or annual |
| Free trial | Not stated | 7 days |
| API | Yes |
Ant Media Server
Sub-second streaming you run yourself
Ant Media Server is streaming infrastructure rather than a streaming service: it takes RTMP or WebRTC in, transcodes, and delivers with latency measured in fractions of a second. Licences are sold by the instance, by the hour for something that runs occasionally and by the month for something always on. SDKs are included rather than sold separately. This is a product for whoever is building the streaming app, not for whoever is going live tonight.
Our note
Work out your hours before choosing between the hourly and monthly licences, because the crossover is around the twentieth day of uptime and event streaming rarely gets near it. Anything running continuously should be on the monthly licence from the start rather than discovering that at the end of a billing period.
Castr
Live streaming with hosting and a paywall
Castr covers the parts of streaming that sit either side of the broadcast: hosting the recording afterwards, running a 24/7 playout channel, and putting a paywall in front of either. Bandwidth is sold as a pool rather than metered per viewer. It is priced for a business running channels, not for somebody going live on a Sunday.
Why people weigh these two
- Castr instead of Ant Media Server
- Castr bundles live streaming with hosting and a paywall from $19.99, hosted for you rather than run on your own instances.
- Ant Media Server instead of Castr
- Ant Media Server is sub-second streaming infrastructure you run yourself from $109, for a business that wants Castr's job on its own servers.
Which one should you pick
Pick Ant Media Server when latency is the requirement and you are building the streaming feature yourself: an auction, a betting product, live shopping. The licence does not meter viewers or streams. Its hourly rate, from $0.24 an instance, keeps an occasional event cheap.
Pick Castr when the business needs a paywall in front of a live stream or a 24/7 channel and nobody wants to write a line of code. Starter is $19.99 a month for 3 streams and 2.4TB of bandwidth, and Premium at $166.67 adds the adaptive bitrate and API access a growing channel eventually needs. A solo creator going live once a week is paying for far more than they will use on either plan.
Common questions
- Does Castr do what Ant Media Server does?
- Not the same job. Ant Media Server is a media server a developer installs for sub-second, interactive streaming. Castr is a hosted platform that turns a broadcast into a paywalled, replayable channel, starting at $19.99 a month with no server to run.
- Which one includes a paywall?
- Castr does, on every tier from Starter at $19.99 a month, letting a business charge for access to a live stream or its recording. Ant Media Server has no paywall feature; it is licensed to deliver the stream, not to monetise the audience watching it.
- Is Ant Media Server cheaper than Castr?
- For an occasional event, yes: the hourly licence starts at $0.24 an instance plus a one-dollar signup fee. For a business running a channel continuously, Castr's bundled bandwidth and hosting at $19.99 a month is simpler to budget than metering Ant Media's uptime by the hour.
- Can I try either before paying?
- Castr offers a 7-day trial with no card required. Ant Media's cloud marketplace listing on AWS also states a seven-day trial, though the self-hosted licence route charges from the first hour.
Ratings are the average of reviews readers left. The facts are stated by each tool’s own listing and are not verified by CloutStack. How we make money.