Software Alternatives, Accelerators & Startups

OpenCalc VS Emisar.dev

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

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OpenCalc logo OpenCalc

Simple and beautiful calculator for Android. Contribute to Darkempire78/OpenCalc development by creating an account on GitHub.

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.
  • OpenCalc Landing page
    Landing page //
    2023-10-05
  • 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

OpenCalc features and specs

  • Open Source
    OpenCalc is open-source, which means that anyone can contribute to its development, inspect the code, and modify it to better fit their needs.
  • Customizable
    Users have the ability to customize and extend the functionality of OpenCalc according to their individual preferences and requirements.
  • Community Support
    Being a part of an active GitHub project, users can benefit from community support and collaboration, which can lead to quicker identification and resolution of issues.
  • Transparency
    The open-source nature of OpenCalc ensures that users can transparently see how their data is being processed and stored, fostering trust in the software's operations.

Possible disadvantages of OpenCalc

  • Potential for Bugs
    As with many open-source projects, there might be bugs or unpolished features, especially if the project does not have comprehensive testing or documentation.
  • Limited Features
    Compared to commercial calculator software, OpenCalc might lack some advanced features and conveniences that are found in fully-developed products.
  • Variable Support
    Support for open-source projects like OpenCalc often depends on the community, which can vary in responsiveness and depth of expertise.
  • Steeper Learning Curve
    Users who want to modify or extend the software might need to have a good understanding of programming and the specific languages or frameworks used in the project.

Emisar.dev features and specs

No features have been listed yet.

OpenCalc videos

Excel VS OpenCalc

Emisar.dev videos

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Category Popularity

0-100% (relative to OpenCalc and Emisar.dev)
Calculators
100 100%
0% 0
AI Tools
0 0%
100% 100
Advanced Calculator
100 100%
0% 0
Infrastructure Monitoring

Questions & Answers

As answered by people managing OpenCalc 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.

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What are some alternatives?

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

SpeedCrunch - SpeedCrunch. SpeedCrunch is a high-precision scientific calculator featuring a fast, keyboard-driven user interface. It is free and open-source software, licensed under the GPL. Download Documentation Donateย .

Qalculate! - Qalculate! is a multiplatform multi-purpose desktop calculator.

Numi App - Numi is a beautiful text calculator for Mac.

Fossify Calculator - Introducing Fossify Calculator โ€“ your versatile and efficient tool for all your calculation needs.

fxSolver - fxSolver is an free online math solver, equation library, graphing calculator and science/engineering problem helper. To get started, add some formulas, fill in any input variables and press "Solve."

GeoGebra Scientific Calculator - Free online scientific calculator from GeoGebra: perform calculations with fractions, statistics and exponential functions, logarithms, trigonometry and much more!