# InlineWhispers

InlineWhispers is a Red-Team & Adversary Emulation product. It runs on-premises. Pricing is free.

A tool for working with Direct System Calls in Cobalt Strike's Beacon Object Files (BOF) for offensive security purposes.

Checked October 2026.

## What is InlineWhispers?

InlineWhispers is a tool designed to work with Direct System Calls in Cobalt Strike's Beacon Object Files (BOF), allowing users to create and manage BOF files for various offensive security purposes.

It provides a convenient way to interact with BOF files, enabling users to create, modify, and execute system calls within the context of a Beacon payload.

InlineWhispers is particularly useful for red teamers and penetration testers who need to create custom BOF files for their operations.

The tool is built on top of the Cobalt Strike framework and is designed to simplify the process of working with BOF files, making it an essential tool for anyone involved in offensive security.

Tags: Red Team

## Quick facts

- Category: [Offensive Security](https://cybersectools.com/categories/offensive-security-testing) · [Red-Team & Adversary Emulation](https://cybersectools.com/categories/offensive-security)
- Deployment: On-Premises
- Company size fit: Mid-Market, Enterprise
- Pricing model: Free
- GitHub stars: 321
- Website: github.com

## InlineWhispers FAQ

### What is InlineWhispers?

InlineWhispers is a product in the Red-Team & Adversary Emulation category. It covers Red Team.

### What is the pricing for InlineWhispers?

InlineWhispers is free. Download and setup instructions are at https://github.com/outflanknl/InlineWhispers/.

### What are alternatives to InlineWhispers?

Alternatives to InlineWhispers listed on CybersecTools:

1. [Fortra Cobalt Strike](https://cybersectools.com/tools/fortra-cobalt-strike) - Threat emulation product for adversary simulations and red team operations (Commercial)
2. [GoSecure Titan® Adversarial Simulation](https://cybersectools.com/tools/gosecure-titanr-adversarial-simulation) - Human-led adversary emulation service testing detection & response capabilities (Commercial)
3. [Core Security Cobalt Strike](https://cybersectools.com/tools/core-security-cobalt-strike) - Post-exploitation threat emulation platform for red team operations. (Commercial)
4. [Dreadnode Offensive Security Agents](https://cybersectools.com/tools/dreadnode-offensive-security-agents) - AI agent platform for automating offensive security operations and evals. (Commercial)
5. [Red Specter Cheatsheet](https://cybersectools.com/tools/red-specter-cheatsheet) - CLI cheatsheet for Red Specter's 30-tool offensive security platform. (Commercial)

Compare all InlineWhispers alternatives at [https://cybersectools.com/alternatives/inlinewhispers](https://cybersectools.com/alternatives/inlinewhispers)

### What deployment and organization size does InlineWhispers fit?

InlineWhispers is available as on-premises software. It is listed for mid-market companies and enterprises. It is free.

## Compare InlineWhispers with similar solutions

- [InlineWhispers vs Fortra Cobalt Strike](https://cybersectools.com/compare/fortra-cobalt-strike-vs-inlinewhispers)
- [InlineWhispers vs GoSecure Titan® Adversarial Simulation](https://cybersectools.com/compare/gosecure-titanr-adversarial-simulation-vs-inlinewhispers)
- [InlineWhispers vs Core Security Cobalt Strike](https://cybersectools.com/compare/core-security-cobalt-strike-vs-inlinewhispers)

All alternatives to InlineWhispers: [/alternatives/inlinewhispers](https://cybersectools.com/alternatives/inlinewhispers)

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Source: https://cybersectools.com/tools/inlinewhispers

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