Software Alternatives, Accelerators & Startups

Devise VS Emisar.dev

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

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Devise logo Devise

Flexible authentication solution for Rails with Warden.

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.
  • Devise Landing page
    Landing page //
    2022-11-04
  • 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

Devise features and specs

  • Comprehensive Functionality
    Devise provides a broad range of authentication features out-of-the-box, including registration, login, password recovery, and session management.
  • Modular and Extensible
    Devise is built with a modular approach, allowing developers to pick and choose the modules they need. It also offers hooks and callbacks for further customization.
  • Community Support
    As one of the most popular authentication solutions for Rails, Devise has extensive community support, abundant documentation, and numerous tutorials, making it easier to get help and find resources.
  • Security
    Devise follows industry-standard security practices, offering features like encryption, configurable secret keys, and other mechanisms to protect against common vulnerabilities.
  • Integration with Rails
    Devise is specifically designed to integrate seamlessly with Ruby on Rails, ensuring a smoother development experience and better compatibility with other Rails components.

Possible disadvantages of Devise

  • Complex Configurations
    For developers new to Devise or those requiring highly custom authentication systems, the configuration can be complicated and may have a steep learning curve.
  • Opinionated Defaults
    Devise comes with many pre-set defaults that may not align with every projectโ€™s requirements. Customizing these defaults can sometimes be cumbersome.
  • Dependency Management
    Devise is a large library with several dependencies. Keeping these dependencies up to date and compatible with the rest of the application can sometimes be challenging.
  • Performance Overhead
    Due to its comprehensive feature set, Devise can introduce performance overhead compared to more lightweight authentication solutions.
  • Ease of Customization
    While Devise offers many customization options, very specific or unconventional authentication workflows can be difficult to implement, requiring significant overrides or extensions.

Emisar.dev features and specs

No features have been listed yet.

Analysis of Devise

Overall verdict

  • Devise is considered a robust and reliable option for authentication in Rails applications. Its ease of use combined with flexibility and wide adoption makes it a good choice for many developers.

Why this product is good

  • Devise is a flexible authentication solution for Rails based on Warden. It is highly popular due to its comprehensive range of features, which include modules for database authentication, registration, password recovery, email confirmation, social integration, and more. Its modularity allows developers to include only the features they need, making the application lighter and faster. Moreover, it has a strong community support offering extensive documentation and resources.

Recommended for

    Devise is recommended for Ruby on Rails developers looking for a well-established and comprehensive authentication library. It's suitable for projects of various sizes, from startups to enterprise-level applications, particularly when rapid development with standard authentication features is desired.

Devise videos

Devise Fingerboard Review

More videos:

  • Review - Figure 8 Devise Review
  • Review - Devise TV on your phone Tzumi Magic TV Best Review

Emisar.dev videos

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

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Category Popularity

0-100% (relative to Devise and Emisar.dev)
Identity And Access Management
AI Tools
0 0%
100% 100
Identity Provider
100 100%
0% 0
Infrastructure Monitoring

Questions & Answers

As answered by people managing Devise 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, Devise seems to be more popular. It has been mentiond 47 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.

Devise mentions (47)

  • What I learned while building ActiveRubyist
    ActiveRubyist is now a Progressive Web App (PWA) with Hotwire-based interactivity. For authentication, I use devise, and for real-time notifications, noticed. Where possible, I lean into default Rails features: for background jobs, I use Solid Queue instead of Sidekiq, keeping everything aligned with the Rails way. - Source: dev.to / about 1 year ago
  • Ruby on Rails Flash notifications with Hotwire and ViewComponents
    Assume we use devise for authentication. We need to subscribe user for personal notifications channel. Add this line to app/views/layouts/application/_flash_container.html.erb. - Source: dev.to / over 2 years ago
  • SpendWise - Budget management app (Ruby on Rails + React) - Part 3
    If you like to know how to implement Devise for user authentication, here's the link- Devise. - Source: dev.to / almost 2 years ago
  • Rails and Keycloak, Authentication Authorization, part one
    Use devise gem, which is probably the most famous rails authentication system. - Source: dev.to / almost 2 years ago
  • Should I Use jwts For Authentication Tokens?
    IMHO the stateful opaque token approach is simple enough that it can (and often does) get baked into whatever language/framework youโ€™re using to write your app. In addition, the very nature of session tokens is such that the logic for what the token actually means/represents lives in your app, on the server. So, that may be why we donโ€™t see more โ€œopaque session tokenโ€ standards/libraries out there as an... - Source: Hacker News / about 2 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 Devise and Emisar.dev, you can also consider the following products

Auth0 - Auth0 is a program for people to get authentication and authorization services for their own business use.

Okta - Enterprise-grade identity management for all your apps, users & devices

OneLogin - On-demand SSO, directory integration, user provisioning and more

Atlassian Crowd - Crowd is a single sign-on and user identity solution.

Amazon Cognito - Amazon Cognito lets you add user sign-up, sign-in, and access control to your web and mobile apps quickly and easily. It scales to millions of users and supports sign-in with social identity providers and enterprise identity providers via SAML 2.0.

Google Cloud IAM - Google Cloud Identity & Access Management (IAM) lets administrators authorize who can take action on specific resources, giving you full control and visibility to manage cloud resources centrally.