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Open WebUI Alternative

Independent comparison, updated October 2026

An open-source alternative to Open WebUI for work beyond chat

Open WebUI and Kortix are both open source, but they solve different problems. One is a self-hosted chat interface over your models. When the work has to run, Kortix is the one we recommend: an AI Operating System where agents land finished work as a change request you review.

Try KortixCompare the options

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

The open-source AI Operating System

kortix.yamlyaml
# kortix.yamlagents:  support-triage:    file: agents/support-triage.md   # what it does, in plain markdown    connectors: all                  # what it may reach
source: https://github.com/kortix-ai/suna

One isolated sandbox per session.

02

Kortix and Open WebUI, side by side

The Kortix column quotes Kortix, the Open WebUI column quotes its own repository and docs. We recommend Kortix when the work has to run.

01What it is
KortixThe open-source AI Operating System
Open WebUIA self-hosted interface over local and API models
02Open source
KortixYes, read it, fork it, audit it
Open WebUIYes
03Where it runs
KortixKortix Cloud, your VPC, or on-prem. Self-host is free
Open WebUIOn your own server or laptop, online or fully offline
04Your configuration
KortixFiles in a git repo you own
Open WebUIAdmin settings and environment variables in your instance
05Models
KortixAny model provider with your own keys
Open WebUIOllama and any OpenAI-compatible API
06Connectors and tools
Kortix3,000+ apps in a click, plus MCP, OpenAPI, GraphQL and raw HTTP
Open WebUIMCP, MCPO and OpenAPI tool servers, plus plugins
07Isolation
KortixOne isolated sandbox per session
Open WebUITerminals gives per-user isolated environments
08Review path
KortixSession work reaches main through a change request
Open WebUIAnswers and artifacts stay in the chat

The Open WebUI column reflects its own repository and documentation, checked October 2026.

03

Six layers, each a file or a command you can read

Kortix is the open-source AI Operating System. Your agents, skills, company memory, and connectors live in one git repo you own, and each session runs on its own cloud computer.

  1. Repo01

    One git repo that is the company

    Your agents, their skills, your company memory and every connector in one git repo you own.

    project treetext
    project (git repo + kortix.yaml)session: an isolated sandbox on a branch named after the sessionthe OpenCode agent workschange request: you review and merge to main
    source: https://github.com/kortix-ai/suna
  2. Connectors02

    Every tool your company already runs on

    3,000+ apps in a click, plus MCP, OpenAPI, Postman, GraphQL and raw HTTP. Connector credentials are brokered server-side and never enter the machine.

    kortix.yamlyaml
    # kortix.yamlagents:  support-triage:    connectors: all   # what it may reach
    source: https://github.com/kortix-ai/suna
  3. Models03

    Any model, your keys

    Any model provider with your own keys. Or the ChatGPT plan you already pay for. Or sign in with your OpenCode Console account for OpenCode Zen and Go.

    terminalsh
    $ kortix providers login opencode$ kortix providers login opencode-go
    source: kortix providers login --help
  4. Harness04

    The part that turns a model into an agent

    OpenCode is the harness. The harness gives a model planning, tool use and multi-step runs it finishes.

    kortix.yamlyaml
    # kortix.yamlagents:  support-triage:    file: agents/support-triage.md   # what it does, in plain markdown
    source: https://github.com/kortix-ai/suna
  5. Computer05

    A cloud computer per session

    One isolated sandbox per session. Each session has its own isolated machine and branch.

    terminalsh
    $ kortix sessions new --prompt "Summarize this week's commits and open a change request"
    source: https://github.com/kortix-ai/suna
  6. Review06

    Work lands as a change request

    Session work reaches main through a change request. Merge is default-deny for agents.

    terminalsh
    $ kortix sessions new --prompt "Reproduce issue #142, fix it, and open a change request"$ kortix cr ls   # review what the agents propose
    source: https://github.com/kortix-ai/suna

GitHub stars

Open source. Read it, fork it, audit it.

05FAQ

Questions people ask before they switch

Short answers, each quoted from Kortix’s own docs.

  1. 01

    What does an alternative to Open WebUI add beyond a chat UI?

    Open WebUI answers questions in a chat over your models and documents. Kortix runs agents on their own cloud computers, takes real actions in your tools and returns finished work: decks, reports, code and replies. Each session lands as a change request you read before it reaches main.

  2. 02

    Can a team self-host it?

    Yes. Run it on Kortix Cloud, in your VPC, or on your own on-prem network. Self-host is free. The instance runs as one Docker Compose stack on a Linux box you control.

  3. 03

    Does it work with my models?

    Any model provider with your own keys. Or the ChatGPT plan you already pay for. Or sign in with your OpenCode Console account for OpenCode Zen and Go.

  4. 04

    How is it different from a workflow engine?

    A workflow engine runs a fixed flowchart: the same steps in the same order every time. Kortix runs open-ended work on a real cloud computer, with the configuration in git and a person approving what changes.

Run your whole company from one repo you own.

Start with one job, then let the repo grow.

Compare the optionsSee the six layers

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