Microsoft Copilot Studio vs StackAI vs Dust

Compared on	Microsoft Copilot Studio From $200/mo VisitRemove	StackAI Free plan VisitRemove	Dust Free plan · from $24/seat/mo VisitRemove
What it is	Microsoft's low-code tool for building AI agents for Microsoft 365 and websites	Enterprise no-code platform for building, deploying and governing AI agents	Workspace for building and sharing AI agents connected to company data
Free plan	No	500 runs per month; 2 projects; 1 seat; community support on Discord	Free seat: 500 credits in total (a lifetime allowance, not monthly); when used up, free users are prompted to request an upgrade
Cheapest paid plan	$200/mo (Copilot Credit capacity pack)Microsoft Copilot Studio pricing	Not publishedStackAI pricing	$24/seat/mo billed annually (Pro seat (Business plan))Dust pricing
What it covers	25,000 Copilot Credits per pack per month; unused credits do not roll over; pay-as-you-go alternative at $0.01 per credit.	Not stated	8,000 credits per seat per month; prices exclude VAT.
Free trial	Trial licence lets individuals build and test agents but not publish them (length not stated); a new free Azure account includes a $200 credit that can be used for agents	None stated	None stated
Platforms	Web	Web, Self-hosted	Web, API
Integrations (vendor's figure)	1,400+ connectors	300+ enterprise integrations	70+ connectors
Open source	No	Yes, self-hostable	No
Good for	An internal help agent in Teams that answers staff questions from company documents A website agent that answers customer questions from return policies and product manuals An agent that processes new orders and emails confirmations automatically	Automating document-heavy compliance or legal review steps Handling IT service requests across ticketing and internal systems Building a customer-support agent grounded in company documents	An internal assistant that answers questions from Notion, Google Drive and Slack content Agents that draft sales or support replies using company knowledge Scheduled agents that compile weekly reports
Watch out for	Publishing agents to channels outside Microsoft 365, such as websites, needs a standalone Copilot Studio plan Prepaid credits reset monthly without rollover; at 125% of prepaid capacity, custom agents are disabled until capacity is added Standalone plans require an Azure subscription to use agents	No self-serve paid plan; anything beyond the free tier is a custom Enterprise quote Free plan: 500 runs a month, 2 projects and 1 seat On-premises and VPC deployment, SSO and dedicated support are Enterprise-only	The Business plan is for teams of up to 100 people Business allows up to 3 connected data sources and 5 remote MCP servers; unlimited connectors need Enterprise Unused credits do not roll over; SCIM and audit logs are Enterprise-only
Made by	Microsoft Corporation	StackAI (owned by Asana, Inc.)	Dust

Entry prices are the cheapest paid plan, as each vendor publishes it; “What it covers” says what that price is per (a user, a channel, a brand, a number of contacts). The sources are listed on each tool's page.

Every tool in AI agent builders is on its category page, with the written head-to-heads on Compare.