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Manus Alternative

Open source Manus alternatives for developers

Kortix is open source, and for a developer that is the point: you self-host it, point it at your own model keys, and keep the whole setup in version control. Manus, OpenManus and AutoGPT are the alternatives weighed against it.

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Manus alternatives for developers, side by side

Kortix is the recommendation; the Manus, OpenManus and AutoGPT columns state what each one documents, checked October 2026.

Open source

  • KortixYes. Open source. Read it, fork it, audit it.
  • ManusNo. A hosted product you sign in to.
  • OpenManusYes. An open-source framework for building general AI agents.
  • AutoGPTYes. The GitHub project is open source; the hosted Platform is paid.

Self-host and where it runs

  • KortixKortix Cloud, your VPC, or your own on-prem network; self-host is free.
  • ManusManus's cloud only; no self-host.
  • OpenManusYou run it on your own machine or server.
  • AutoGPTSelf-host on your own infrastructure, or run the managed Platform.

Model choice and keys

  • KortixAny model provider with your own keys.
  • ManusA Flex key (OpenRouter, Fireworks, Modal); agent infrastructure still consumes Manus credits.
  • OpenManusThe LLM API keys you add to config.toml.
  • AutoGPTBuilt-in models on the Platform; self-host brings your own keys.

How it is configured

  • KortixAgents, skills, memory and connectors as files in one git repo.
  • ManusInside Manus's web app.
  • OpenManusOne config.toml and Python files in your clone.
  • AutoGPTA visual builder, or AutoPilot in plain English.

Developer workflow

  • KortixA managed cloud for your coding agents: kortix init, then kortix ship.
  • ManusA RESTful API to create tasks and get results.
  • OpenManusPython entry points (main.py, run_mcp.py) and MCP tools.
  • AutoGPTBlocks connect 45+ platforms; hundreds of models built in.

Three commands to a running project

Self-host, scaffold the project repo, and ship it live.

CLI

terminal
$ kortix self-host start$ kortix init$ kortix ship
Read the docs

kortix.yaml

kortix.yaml
kortix_version: 2default_agent: kortixagents:  kortix:    file: agents/kortix.md    connectors: all
Kortix on GitHub

Choosing a Manus alternative as a developer

Replacing Manus comes down to three questions: where the work runs, whose keys pay for the model, and whether the setup lives in a file you can review. Those questions separate the options more than any feature list.

Manus is a hosted agent. You sign in, describe a task, and Manus plans and executes it in Manus's own cloud, returning a finished deliverable; its documentation describes an autonomous general agent that plans, executes and delivers complete work products. For a single autonomous task you hand off and check later, that is a complete product. Manus Flex lets you power it with your own inference key from OpenRouter, Fireworks or Modal, while the rest of the task's infrastructure still spends Manus credits. Developers who want to call it from code can use its RESTful API to create tasks and retrieve results.

When you want an open-source framework you wire yourself, OpenManus and AutoGPT are the names to know. OpenManus is a compact Python framework: clone the repository, add your LLM API keys to config.toml, and run it from a terminal with a Browser Use MCP server attached. AutoGPT is the larger project, at 185,000+ GitHub stars (checked October 2026), with a visual builder, a marketplace of ready-made agents and connections to 45+ platforms. Both hand you an agent you operate yourself; neither ships the team layer around it.

When the agent layer belongs to a whole team, the shape changes. Kortix is the open-source AI Operating System: your agents, their skills, your company memory and every connector are files in one git repo you own. Each session runs on its own cloud computer and branch, and session work reaches main through a change request a person approves, because merge is default-deny for agents. Any model provider works with your own keys, or the ChatGPT plan you already pay for. You choose where it runs: Kortix Cloud, your VPC, or your own on-prem network, and self-host is free. For developers it is a managed cloud for your coding agents: kortix init, then kortix ship, and background agents with a preview per change.

Two pages go deeper. Self-hosting Kortix covers the install on your own server, and the comparison sets Kortix against the wider field of open-source options. For the commands and the configuration, Read the docs.

Questions developers ask about a Manus alternative

  1. Is there an open-source Manus alternative for developers?

    Yes. Kortix is open source, and it is a managed cloud for your coding agents: kortix init, then kortix ship. Manus also documents a RESTful API for creating tasks and retrieving results.

  2. Can I run Manus on my own infrastructure?

    No. Manus runs only in Manus's cloud, and its own documentation describes a product you sign in to, not a server you host. Kortix is the open-source alternative you can run on your own infrastructure.

  3. Which Manus alternative can I self-host?

    Kortix, OpenManus and AutoGPT each have a self-host path. Kortix self-hosts free, and the first run asks six things and no model key; OpenManus runs from a cloned Python repository, and AutoGPT self-hosts with your own infrastructure and model keys.

  4. Can my whole team share one configuration?

    With Kortix, yes: agents, skills, memory and connectors are files in one git repo the team clones, reviews and rolls back. Manus keeps tasks and output inside its own app, and OpenManus and AutoGPT keep configuration in each deployment.

Run the open-source stack you own

Install in three commands, or self-host the full platform on your own server.

Try KortixSelf-host guide

Open source · Any model, your keys · Self-host, VPC, or on-prem