Software Alternatives, Accelerators & Startups

Castr VS Emisar.dev

Compare Castr VS Emisar.dev and see what are their differences

Note: These products don't have any matching categories. If you think this is a mistake, please edit the details of one of the products and suggest appropriate categories.

Castr logo Castr

Castr.io allows streamers to stream to multiple streaming platforms simultaneously!

Emisar.dev logo Emisar.dev

One governed MCP server connects any AI agent to a finite action catalog, enforced on-host with pack trust, policy gates, human approvals, and a hash-chained audit trail.
  • Castr Landing page
    Landing page //
    2022-11-05
  • Emisar.dev Approvals
    Approvals //
    2026-07-21
  • Emisar.dev Audit Log
    Audit Log //
    2026-07-21
  • Emisar.dev Policies
    Policies //
    2026-07-21
  • Emisar.dev Runner fleet
    Runner fleet //
    2026-07-21

Emisar is the last MCP server youโ€™ll need to install: a Zero-Trust gateway connecting Claude, Cursor, ChatGPT, and any AI agent to your infrastructure. One server handles production access, debugging, alerts, and internal operations, with new capabilities added as packs. Agents can inspect real production state, debug what they shipped, and help resolve incidents. Safe reads run automatically; policy allows, blocks, or routes risky actions for approval. No SSH keys, VPNs, remote shells, or standing shell access โ€” and every call is recorded.

Emisar.dev

Website
emisar.dev
$ Details
freemium $20.0 / Monthly (per runner)
Startup details
Country
United States
State
CA
Founder(s)
Andrew Dryga
Employees
1 - 9

Castr features and specs

  • Multi-Platform Streaming
    Castr allows users to stream to multiple platforms simultaneously, such as Facebook, YouTube, Twitch, and more, which enhances audience reach and engagement.
  • User-Friendly Interface
    The platform offers an intuitive and easy-to-navigate interface, making it accessible for users with varying levels of technical proficiency.
  • Customizable Player
    Castr provides users the ability to customize their video player, including colors, logos, and other branding elements, to maintain a consistent brand identity.
  • Low Latency
    The platform boasts low-latency streaming, which minimizes delays and provides a more real-time experience for viewers.
  • Analytics and Insights
    Castr offers comprehensive analytics and insights that help users track their live streams' performance and make data-driven decisions.
  • 24/7 Customer Support
    Users have access to round-the-clock customer support, ensuring any issues or queries are promptly addressed.

Possible disadvantages of Castr

  • Cost
    Compared to some competitors, Castr can be relatively expensive, especially for users who are looking for basic streaming features.
  • Learning Curve for Advanced Features
    While the basic interface is user-friendly, some of the more advanced features may require additional time and effort to learn and utilize effectively.
  • Limited Free Plan
    The free plan offered by Castr has limited features and functionalities, potentially necessitating an upgrade to a paid plan for more robust capabilities.
  • Bandwidth Limits
    Some of the pricing plans come with bandwidth limits, which might be restrictive for users who have high streaming demands.
  • Geographic Restrictions
    Users in certain regions may experience restrictions or reduced performance due to geographic limitations.

Emisar.dev features and specs

No features have been listed yet.

Castr videos

Castr vs Restream - Multi streaming Review

More videos:

  • Review - Restream VS Castr Comparison. Which is the best multi-streaming service?
  • Tutorial - How To Live Stream to Multiple Platforms At The Same Time | Castr.io

Emisar.dev videos

No Emisar.dev videos yet. You could help us improve this page by suggesting one.

Add video

Category Popularity

0-100% (relative to Castr and Emisar.dev)
Video Streaming
100 100%
0% 0
AI Tools
0 0%
100% 100
Live Streaming
100 100%
0% 0
Infrastructure Monitoring

Questions & Answers

As answered by people managing Castr and Emisar.dev.

How would you describe the primary audience of your product?

Emisar.dev's answer:

emisar is for SRE, DevOps, platform engineering, infrastructure, and security teams that want AI agents to inspect and operate production systems. It is especially relevant to teams managing multiple Linux hosts, clusters, databases, cloud services, or regulated environments where unrestricted shell access and incomplete audit records are unacceptable.

Which are the primary technologies used for building your product?

Emisar.dev's answer:

The hosted control plane and operator interface use Elixir, Phoenix, LiveView, PostgreSQL, and Tailwind CSS. The host runner and MCP bridge are written in Go. Action packs use YAML and JSON Schema, while production infrastructure is managed with Terraform on Google Cloud. The system communicates through MCP, OAuth 2.1, TLS, and WebSockets.

Who are some of the biggest customers of your product?

Emisar.dev's answer:

  • Blitz.gg - game analytics for billions of matches and a pretty large infrastructure.

What's the story behind your product?

Emisar.dev's answer:

Founder Andrii Dryga spent a decade working as a CTO, full-stack engineer, SRE, and DevOps engineer. He experienced the cost of running the wrong command on the wrong cluster, while also seeing AI solve operational problems in seconds. emisar grew from the need to preserve both truths: AI agents are useful, and production access must remain bounded. Its answer is to give agents a reviewed catalog of operations instead of a blank terminal.

What makes your product unique?

Emisar.dev's answer:

emisar lets AI agents work on real infrastructure without giving them a shell. Agents choose from a finite catalog of typed, versioned actions. Policy decides what runs, what requires approval, and what is denied, while an outbound-only runner verifies the action again on the host. New capabilities arrive as packs behind the same MCP integration, and every request is recorded in both a searchable audit trail and a tamper-evident host journal. [

Why should a person choose your product over its competitors?

Emisar.dev's answer:

Choose emisar when you want an agent to keep investigating and handling routine operations without handing it SSH credentials or supervising every call. Compared with raw shell access, copy-paste workflows, or one-off MCP servers, emisar provides reviewed action contracts, host-level enforcement, risk-based policy, scoped access, approvals, pack integrity checks, and a durable audit trail. It is built specifically for governed infrastructure access rather than generic automation.

User comments

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Social recommendations and mentions

Based on our record, Castr seems to be more popular. It has been mentiond 6 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.

Castr mentions (6)

  • how do other streamers read their chats?
    I use castr.io, which is a little less expensive than restream imho. I'm on their Multistream Plus plan, which allows up to 2 concurrent streams and multistreaming to up to 5 destinations. I think they charge $12.50/mo, but I've been getting it for less on an annual plan because they offered a special discount during the holidays. Source: over 3 years ago
  • Suggestions on cameras for Mixed Martial Arts
    We're going to broadcast this PPV through castr.io (looking at 1080p) and I'm currently using an ATEM Mini Pro Extreme ISO (HDMI Inputs). Source: over 3 years ago
  • Ask HN: Recommend video streaming CDN service
    Https://www.100ms.live/ Super low-latency livestreaming API with premium pricing https://castr.io/ All-In-One, ok pricing https://www.api.stream/ Good, pay as you go pricing https://liveapi.com/pricing/ Good, pay-as-you-go pricing https://www.simplelive.co/livestream One click embeded live stream start-up, pricing seems to good to be true * Example repo which used Jitsi for livestreaming to thousands:... - Source: Hacker News / almost 4 years ago
  • Getting chats from YouTube and Twitch.
    I personally use castr.io which combines them into one chat, however it can be buggy sometimes and not always be the most dependable. I would love to know of other options to pull this off as I multistream myself (even though I am a twitch affiliate). Source: almost 4 years ago
  • Which Platform for 24/7 Live Streaming?
    You'd be using something else to push simultaneously to YouTube and Twitch. OBS can send RTMP to 2 destinations, or you can use a dedicated service like castr.io or restream. Both take in a single RTMP, and send it to multiple locations. Source: about 4 years ago
View more

Emisar.dev mentions (0)

We have not tracked any mentions of Emisar.dev yet. Tracking of Emisar.dev recommendations started around Jul 2026.

What are some alternatives?

When comparing Castr and Emisar.dev, you can also consider the following products

Restream - Restream is your live streaming companion. Easily broadcast your content live from your browser to 30+ platforms at the same time.

Flutin - Flutin is an online live streaming platform through which you can easily multistream on 40+ platforms.

YouTube - Our mission is to give everyone a voice and show them the world.

Vimeo Live - Live stream your videos in high-quality 1080p, get tools to boost engagement (and lower stress), and enjoy one home for all your live and uploaded videos.

StreamYard - StreamYard is a live streaming studio in your browser.

GiveCentral Live - GiveCentral Live is an online web streaming solution that allows you to live-stream your charity events, galas, and other fundraising activities to your supporters.