StackAI vs Microsoft Copilot Studio vs Relevance AI

Compared on	StackAI Free plan VisitRemove	Microsoft Copilot Studio From $200/mo VisitRemove	Relevance AI Contact sales VisitRemove
What it is	Enterprise no-code platform for building, deploying and governing AI agents	Microsoft's low-code tool for building AI agents for Microsoft 365 and websites	Platform for building teams of specialised AI agents for sales and operations
Free plan	500 runs per month; 2 projects; 1 seat; community support on Discord	No	No
Cheapest paid plan	Not publishedStackAI pricing	$200/mo (Copilot Credit capacity pack)Microsoft Copilot Studio pricing	Not publishedRelevance AI pricing
What it covers	Not stated	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
Free trial	None stated	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
Platforms	Web, Self-hosted	Web	Web, API
Integrations (vendor's figure)	300+ enterprise integrations	1,400+ connectors	1,000+ apps
Open source	Yes, self-hostable	No	No
Good for	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 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	Researching and enriching prospect lists before outreach Preparing briefs before sales meetings and drafting follow-ups after calls Drafting proposals from deal information
Watch out for	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	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 published prices, free plan or self-serve plan; getting started means talking to sales The only listed plan (Enterprise) uses custom action and vendor-credit allowances rather than fixed published limits
Made by	StackAI (owned by Asana, Inc.)	Microsoft Corporation	OnSearch Pty Ltd (trading as Relevance AI)

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.