claudecoworkalternative.com · 2026-10-29
Cowork names two sold products; open source is the layer you keep
Cowork now names two sold products, Microsoft Copilot Cowork and Claude Cowork, which became part of Claude in September 2026. Both run the work inside a tenant you rent. Kortix is the open-source CompanyOS, with that layer in a repository the team controls, and that is my pick for a team that wants to keep it; I work on Kortix's marketing, so weigh that accordingly.
Three ways to get a coworker that does the work
Rival cells come from each vendor's own pages, checked October 2026.
The manifest at the root of a Kortix project
# The agent a session or trigger runs when it names none. My Kortix hands# work to `worker` by name; a helper it starts without naming an agent works# with My Kortix's own access.default_agent: mykortix # Workspace skills: folders under skills/, registered by name. Each agent then# enables them with its own `skills:` grant.skills: {}Seven lines from the starter manifest at the root of a Kortix project: default_agent, the agent a session or trigger runs when it names none, and the workspace skills folders registered by name, which each agent then enables with its own skills: grant.
Two products sold to companies answer to the name
Ask ten people what Cowork is and the answers split by vendor. Microsoft's Copilot Cowork runs multi-step work inside Microsoft 365: email in Outlook, meetings and calendar, files in OneDrive and SharePoint, Teams posts, and Word, Excel and PowerPoint documents. Microsoft documents work and school accounts as generally available, with personal accounts in preview (Cowork overview). Fabric and Dynamics 365 come in as plugins: Fabric IQ is a generally available feature of Microsoft Fabric, installed by default (Fabric IQ in Cowork), and the Dynamics 365 Customer Service, Sales and ERP plugins ship through the Microsoft 365 App Store (available plugins).
Since September 16, 2026, Cowork has been a feature of Claude rather than a product sold on its own, and the work it did now starts from any conversation. Pro, Max and Ultra plans received it first, with more plans to follow.
The interaction each vendor describes is close. Microsoft says you approve each action before it happens, and its product page adds a pause before sending an email or scheduling a meeting. Anthropic's default starts new tasks in "Automatically approve" mode on Pro, Max and Team plans, and in "Manually approve" on Enterprise plans, screening each action and asking when it judges one unsafe. The packaging differs: Microsoft sells Copilot Cowork through usage-based billing, while Anthropic includes Cowork in paid Claude plans.
What both products keep inside the rent
What a coworker knows is the interesting part, and on both platforms that knowledge gathers in an account the company does not hold. Claude keeps conversations, artifacts, connectors and skills inside the Claude account, so the merge moved the work into conversation without moving the store. Microsoft grounds Copilot Cowork through Work IQ in email, meetings and files, and keeps the data in the customer's Microsoft 365 tenant, which Microsoft operates.
That arrangement feels fine until the question changes from which product to buy to what the company keeps if it stops buying. Neither vendor's pages describe a repository a team can clone, and neither describes a self-hosted install. The coworker, its skills and its memory stay where the subscription put them. Choosing between the two matters less than choosing whether that layer stays rented.
The layer a team can hold in git
Kortix takes the other position. Each Kortix project lives in a git repo whose root holds kortix.yaml, and the agents, skill folders, memory, tools, triggers and connector configuration are files in it (the manifest reference). The manifest registers what exists across the project: the connectors, the triggers and the secret names the work needs. Each agent's block holds its description, mode, model, permissions and grants. The prompt itself is a markdown file, so the part that decides how work happens is text a teammate can read in a diff.
Kortix ships as open source. Read it, fork it, audit it. A skill change arrives as a diff, a memory edit can be reverted, and a new agent is a file someone reviews before it runs.
What ownership changes week to week
Two habits follow from a repository. The first is review: session work reaches main through a change request, and a person reviews the change before it lands. The second is portability: the files that describe today's setup are the same files a team carries to another machine, another project, or the next model it wants to try.
The bill changes shape too. A finance lead who has compared per-seat pricing with consumption will recognize the difference, and will ask which line grows as the team hands over more work. Kortix's pricing page lists the tiers.
Choosing past the name
If the work already lives in Microsoft 365 and approvals need to happen inside that tenant, Copilot Cowork is the direct fit. If the work starts in Claude and the team is on Pro or Max, the merged Claude is the direct fit. Neither answer settles who holds the layer underneath.
Kortix is for the team that wants that layer in its own repo. Run it on Kortix Cloud, in your VPC, or on your own on-prem network.
The three sit side by side in the comparison. For the merge itself, read what Claude Cowork became; for the tenant question, read how it differs from Microsoft Copilot; and for the wider field, the alternatives page covers the rest.
Cowork questions, answered plainly
Each answer rests on the vendor's own page, checked October 2026.
What does cowork mean in AI?
Cowork is a product name for an agent that takes a multi-step task and returns finished work such as a document, a deck or a sent email. Microsoft Copilot Cowork and Claude Cowork are the two that companies buy.
Is Cowork the same as Copilot?
No. Two products sold to companies use the Cowork name. Microsoft Copilot Cowork works inside Microsoft 365, reaching Fabric through the Fabric IQ plugin and Dynamics 365 through its plugins, while Claude Cowork is now part of Claude, so they come from separate vendors.
Is Microsoft Cowork available?
Yes. Copilot Cowork is generally available for work and school accounts, and personal accounts are in preview. It comes through usage-based billing, and an admin enables it in the Microsoft 365 admin center.
Is Copilot Cowork any good?
That depends on the work. Microsoft's pages show it drafting decks, sorting inboxes and preparing briefings inside Microsoft 365, with a pause before sensitive actions. Judge it on your own tasks, and on whether you want the layer in Microsoft's tenant.
Is Claude Cowork free to use?
Not today. Claude Cowork ships with paid Claude plans, with Pro at $17 a month billed annually or $20 monthly, and Anthropic says Free plans will follow (Anthropic's pricing). Kortix installs on a server you run (the self-hosting guide).
Put the coworker in a repo you control
Start hosted or self-hosted, and keep the configuration with the team.