Alternatives · AI Chatbot Builders

Best Stack AI Alternatives

A sourced shortlist of Relevance AI, Dify, Microsoft Copilot Studio, Dust and Gumloop, compared with Stack AI on pricing, free plan, automation, AI and fit. No rankings and no paid placement.

  • Verified 13 Nov 2026Sources are dated on this page
  • 5 alternativesEach with a full sourced profile
  • Not a rankingFit depends on your priorities
  • Not tested by Stack18Editorial summary of documented facts
Quick answer

What are the best alternatives to Stack AI?

The alternatives to Stack AI covered here are Relevance AI, Dify, Microsoft Copilot Studio, Dust and Gumloop. Each is reviewed on pricing structure, free plan, automation, AI and fit, and none is best for everyone: the right choice depends on team size, budget, workflow and how much control you need.

Teams look for Stack AI alternatives after the Asana acquisition, when they need self-serve paid plans, or when they want open source.

The shortlist below covers Relevance AI, Dify, Microsoft Copilot Studio, Dust and Gumloop.

Why switch

Why teams look for Stack AI alternatives.

The most common reasons teams evaluate other options, drawn from the sources reviewed.

01

Build style

Platforms range from no-code builders to visual canvases and developer frameworks.

02

Pricing structure

Messages, credits, seats and usage-based billing behave differently at scale.

03

Ecosystem fit

Some are tied to Microsoft, Salesforce or another suite; others are vendor-neutral.

04

Deployment and control

Self-hosting, open source and enterprise governance options differ.

Shortlist

Best Stack AI alternatives at a glance.

Suitability depends on company size, budget, use case and technical requirements. Open a profile for sources and caveats.

Stack AI alternatives compared on best fit, pricing, free plan and trade-offs
AlternativeBest forPricingFree planTrade-offs
Relevance AITeams building multi-agent workforces for sales and operations.Docs list Pro from $19 and Team from $234 a month (annual); public page shows Enterprise only. NoTwo meters; Enterprise-only public pricing.
DifyDevelopers who want a self-hostable visual builder for LLM apps.Free self-hosted; Cloud Professional $59 and Team $159 a month; Enterprise custom. YesLicence conditions; enterprise features gated.
Microsoft Copilot StudioMicrosoft 365 organisations building agents for Teams and the web.$0.01 per Copilot Credit pay-as-you-go, or $200 a month for 25,000 credits. NoCredit consumption hard to predict.
DustTeams that want agents grounded in company knowledge with clear seat pricing.Pro $30 and Max $150 per seat a month (less annually); Enterprise custom. NoPer-seat costs; credit metering.
GumloopTeams building AI-heavy automations on a visual canvas.Pro from $37 a month with 20,000 credits plus an 8% orchestration fee; Enterprise custom. NoNo free plan; orchestration fee.
In detail

Each Stack AI alternative described.

Relevance AI

Relevance AI · AI workforce platform for building and managing teams of AI agents

Relevance AI is a no-code and low-code platform for building AI agents and multi-agent workforces that research, write, update systems and run calls and meetings, with tools, knowledge and integrations. It bills two meters: Actions for each tool run and Vendor Credits for AI model costs passed through at wholesale.

Pricing
Docs list Pro from $19 and Team from $234 a month (annual); public page shows Enterprise only.
Free plan
No
Strengths
  • Model costs passed through at wholesale.
  • Multi-agent workforces.
Trade-offs versus Stack AI
  • Two meters; Enterprise-only public pricing.

Dify

LangGenius · Open-source platform for agentic workflows, RAG and chatbots

Dify is an open-source platform from LangGenius for building and running LLM applications: agents, agentic workflows, chatbots and RAG pipelines, designed on a visual canvas and published as web apps, APIs, embeds or MCP-compatible tools. It is available as free self-hosted software and as Dify Cloud.

Pricing
Free self-hosted; Cloud Professional $59 and Team $159 a month; Enterprise custom.
Free plan
Yes
Strengths
  • Free self-hosting with the full visual builder.
  • Broad model and plugin support.
Trade-offs versus Stack AI
  • Licence conditions; enterprise features gated.

Microsoft Copilot Studio

Microsoft · Low-code agent builder for Microsoft 365, Teams, websites and Power Platform

Microsoft Copilot Studio is a low-code platform for building, testing and publishing AI agents and conversational bots that work in Microsoft Teams, Microsoft 365 Copilot, websites and other channels, grounded in company data and connected to systems through Power Platform connectors and flows. It is billed in Copilot Credits rather than per user.

Pricing
$0.01 per Copilot Credit pay-as-you-go, or $200 a month for 25,000 credits.
Free plan
No
Strengths
  • Native to Microsoft 365 and Teams.
  • No per-user fee; free maker licence.
Trade-offs versus Stack AI
  • Credit consumption hard to predict.

Dust

Dust · Workspace for building AI agents on company knowledge and tools

Dust is a platform for building and using AI agents connected to a company's own documents and tools, such as Notion, Slack, Google Drive, GitHub and MCP servers. Teams create agents for support, sales, engineering and operations and use them in Dust, Slack or other surfaces, with per-seat pricing that includes monthly credits.

Pricing
Pro $30 and Max $150 per seat a month (less annually); Enterprise custom.
Free plan
No
Strengths
  • Transparent per-seat pricing.
  • Strong connectors to company knowledge.
Trade-offs versus Stack AI
  • Per-seat costs; credit metering.

Gumloop

Gumloop · AI workflow and agent builder with a visual node canvas

Gumloop is an AI automation platform where teams build workflows on a node-based canvas and create AI agents that use tools and integrations, including its Gummie assistant that helps build flows. It offers 35+ models or bring-your-own keys and is billed in credits.

Pricing
Pro from $37 a month with 20,000 credits plus an 8% orchestration fee; Enterprise custom.
Free plan
No
Strengths
  • Unlimited seats on every plan.
  • Low entry price for a full builder.
Trade-offs versus Stack AI
  • No free plan; orchestration fee.
Best-fit scenarios

Which Stack AI alternative should you choose?

No single alternative is best for everyone. Match the scenario to your own requirements, then test your shortlist against a real process.

Consider Relevance AI if you…

  • Teams building multi-agent workforces for sales and operations.
See the Relevance AI profile

Consider Dify if you…

  • Developers who want a self-hostable visual builder for LLM apps.
See the Dify profile

Consider Microsoft Copilot Studio if you…

  • Microsoft 365 organisations building agents for Teams and the web.
See the Microsoft Copilot Studio profile

Consider Dust if you…

  • Teams that want agents grounded in company knowledge with clear seat pricing.
See the Dust profile

Consider Gumloop if you…

  • Teams building AI-heavy automations on a visual canvas.
See the Gumloop profile
Switching

How to switch from Stack AI.

Moving away from Stack AI means exporting or rebuilding flows, re-uploading knowledge, reconnecting channels, APIs and tools, and re-running conversation tests. Rebuild one agent in the new platform before migrating the rest.

General switching checklist
  1. Export a sample of your data and test an import into the new product.
  2. List the automations, integrations and permissions you would need to rebuild.
  3. Pilot with one team before a full cut-over.
  4. Check contract terms and notice periods with the current vendor.

General guidance, not specific to any vendor. Confirm migration options with the vendors.

FAQ

Stack AI alternatives: questions and answers

What is the best alternative to Stack AI?

No single alternative is best for everyone. Relevance AI, Dify, Microsoft Copilot Studio, Dust and Gumloop each suit different needs; test two or three on a real task before choosing.

Is there a free alternative to Stack AI?

Yes. Dify document a free plan, free tier or free open-source use. Free tiers usually cap usage, and model costs may still apply.

What is the cheapest alternative to Stack AI?

Entry prices from the profiles: Relevance AI: Docs list Pro from $19 and Team from $234 a month (annual); public page shows Enterprise only.; Dify: Free self-hosted; Cloud Professional $59 and Team $159 a month; Enterprise custom.; Microsoft Copilot Studio: $0.01 per Copilot Credit pay-as-you-go, or $200 a month for 25,000 credits.; Dust: Pro $30 and Max $150 per seat a month (less annually); Enterprise custom.; Gumloop: Pro from $37 a month with 20,000 credits plus an 8% orchestration fee; Enterprise custom. Compare total cost at your expected usage, not just the entry price.

Is there an open-source alternative to Stack AI?

Yes. Dify are documented as open source or source-available.

Sources and verification

Where this shortlist comes from.

Alternatives are summarised from the linked profiles and their sources. Confirm current details with each vendor. Stack18 has not tested these products.

Next step

Evaluating Stack AI alternatives?

Compare your shortlist side by side, read the full profiles, or talk to Stack18 if off-the-shelf software is not the answer.

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