Software Alternatives, Accelerators & Startups

Yjs VS Emisar.dev

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

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Yjs logo Yjs

A CRDT framework with a powerful abstraction of shared data, Shared data types for building collaborative software

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.
  • Yjs Landing page
    Landing page //
    2023-09-01
  • 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

Yjs features and specs

  • Real-time Collaboration
    Yjs enables real-time collaborative editing, allowing multiple users to work on the same document simultaneously without conflicts.
  • Conflict-free Replicated Data Type (CRDT)
    Yjs employs CRDTs to automatically resolve changes and conflicts, eliminating the need for complex merging algorithms.
  • Scalability
    The framework is designed to efficiently handle a large number of users, making it suitable for large-scale collaborative applications.
  • Offline Editing
    Yjs supports offline editing, allowing users to make changes while disconnected from the network and synchronizing them once back online.
  • Language Agnostic
    Yjs can be integrated with different programming languages, making it flexible for various tech stacks.
  • Open Source
    As an open-source library, Yjs provides full transparency of its codebase and fosters a supportive community for continuous improvement.

Possible disadvantages of Yjs

  • Complexity of CRDTs
    While powerful, CRDTs introduce a level of complexity that might be challenging for developers unfamiliar with distributed systems.
  • Learning Curve
    Developers may need time to understand and effectively implement Yjs, especially if they are new to real-time collaboration frameworks.
  • Integration Overhead
    Adding Yjs to an existing application might require significant changes in the architecture, particularly if the app wasn't initially designed for real-time collaboration.
  • Performance Overhead
    Handling a large amount of operational transformations in real-time can introduce performance overhead, especially in less optimized implementations.

Emisar.dev features and specs

No features have been listed yet.

Category Popularity

0-100% (relative to Yjs and Emisar.dev)
Databases
100 100%
0% 0
AI Tools
0 0%
100% 100
Developer Tools
100 100%
0% 0
Infrastructure Monitoring

Questions & Answers

As answered by people managing Yjs 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, Yjs seems to be more popular. It has been mentiond 26 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.

Yjs mentions (26)

  • Centralized vs. Decentralized: Why Modern Collaborative Tools choose CRDTs
    In the architecture of my Collaborative-Code-Editor, choosing CRDTs over OT gives me the advantage of not depending on a server for my data conflicts. Using Yjs as my CRDT library, not only fixes the problems OT arises but comes with additional features. A unique identifier keeps track of the characters' identity, and relative addressing that points to the character position in my code editor. The relative... - Source: dev.to / 2 months ago
  • Quack: The DuckDB Client-Server Protocol
    Highly suggest you take a look here: https://github.com/yjs/yjs CRDT can absolutely do what youโ€™re asking. - Source: Hacker News / 3 months ago
  • Show HN: Opensidian: Local-first notes in the browser with POSIX shell and sync
    ``` Those commands create and move real files that immediately appear in the editor's file tree. The best part is that all of this works in both browser and server-side contexts, since yjs (https://github.com/yjs/yjs) is isomorphic. Under the hood, metadata (name, parent, timestamps) lives in a versioned CRDT table. Document content lives in a separate Y.Doc per file, so the directory index syncs without pulling... - Source: Hacker News / 4 months ago
  • Local-First Software: Why the Future of Apps Doesn't Need the Cloud
    Libraries like Automerge and Yjs have gone from academic curiosities to production-ready tools. They handle edge cases that would have made local-first apps unreliable five years ago. - Source: dev.to / 4 months ago
  • Show HN: ยตJS, a 5KB alternative to Htmx and Turbo with zero dependencies
    I really like these sorts of frameworks from an architectural perspective, but what's the use-case? Maybe I'm too SPA-pilled, because to me all the fun of Web development is in providing really fluid, skeuomorphic experiences like those enabled by, eg pragmatic-drag-and-drop[0] or yjs[1]. I just struggle to envision what application benefits from the efficiency that this or htmx offer, but from neither the... - Source: Hacker News / 5 months 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 Yjs and Emisar.dev, you can also consider the following products

GUN - Self-hosted Firebase.

RxDB - A fast, offline-first, reactive Database for JavaScript Applications

Liveblocks - Build amazing realโ€‘time collaborative products

Reflect.net - High-performance sync for multiplayer web apps. Up to 120 FPS sync, automatic persistence, server authority, fine-grained auth, and more...

Thymer - Web-based Project management and task planning for people who hate project management and task planning. For individuals, teams and small businesses.

ShareDB - Realtime database backend based on Operational Transformation (OT)