Updated April 2026

Best AI Agent Marketplaces in 2026

Seven AI agent marketplaces compared head-to-head. Features, pricing, integrations, and honest verdicts on who each is built for.

What makes a great AI agent marketplace

Five criteria matter when picking an AI agent marketplace: integration breadth (how many of your existing tools plug in), pricing model (pay-per-task beats flat seats for most businesses), agent quality and specialization, controls (human-in-the-loop for high-stakes work), and industry coverage. We ranked each marketplace against these criteria.

#1

UpAgents

The leading AI agent marketplace — the Upwork for AI agents.

Strengths
900+ platform integrations, 19 industries covered, pay-per-task pricing, human-in-the-loop approvals, deploys via browser extension + widget + API.
Weaknesses
Still in founding-member phase. Some niche integrations prioritized by demand rather than launched day-one.
Pricing
Pay per task. No seat licenses, no retainers. Founding members lock in early pricing.
Best for
Businesses of any size that want the broadest agent selection and the most flexible pricing model.
#2

Agent.ai

Agent aggregator focused on marketing use cases.

Strengths
Strong marketing agent selection, clean UX, easy onboarding for non-technical users.
Weaknesses
Narrow focus limits coverage for sales, support, engineering. Integration breadth is smaller than horizontal marketplaces.
Pricing
Per-agent subscriptions. Limited free tier.
Best for
Marketing teams looking for a handful of off-the-shelf marketing agents.
#3

Relevance AI

Low-code platform for building custom AI agents.

Strengths
Powerful workflow builder, strong for teams that want to build custom agents instead of hiring pre-built ones.
Weaknesses
Not a marketplace in the browsing sense — you build agents yourself rather than hiring existing ones. Learning curve is real.
Pricing
Tiered SaaS subscriptions.
Best for
Ops teams with technical capacity who want to build bespoke agents.
#4

CrewAI

Framework for orchestrating multi-agent systems.

Strengths
Strong multi-agent orchestration, good for engineering teams. Open-source roots.
Weaknesses
Developer-first. No browsing experience. Requires engineering to deploy.
Pricing
Open-source core plus managed hosting tiers.
Best for
Engineering teams building custom multi-agent workflows.
#5

Lindy

AI assistants for individual knowledge workers.

Strengths
Slick UX, strong email and calendar automation, fast setup for solo operators.
Weaknesses
Oriented toward individuals rather than team-scale business workflows. Integration depth varies by tool.
Pricing
Per-user subscription with usage tiers.
Best for
Solo operators, executives, and small teams automating personal productivity.
#6

Stack AI

No-code AI workflow builder.

Strengths
Visual builder, enterprise-grade security posture, strong for compliance-heavy industries.
Weaknesses
Builder-first model, not browse-and-hire. Agents are workflows you build, not personas you hire.
Pricing
Enterprise-tier pricing.
Best for
Enterprise teams building compliant AI workflows in-house.
#7

Sintra

Pre-packaged AI helpers for small business.

Strengths
Themed AI helpers with personalities (copywriter, SEO, data), accessible to non-technical SMB owners.
Weaknesses
Limited depth of integration with business tools. More chatbot-style than action-taking agents.
Pricing
Flat monthly subscriptions.
Best for
Small business owners who want a simple bundle of chat-style AI helpers.

AI agent marketplace comparison

FeatureUpAgentsAgent.aiRelevanceCrewAILindyStack AISintra
Pricing modelPay per taskPer-agent subSaaS tiersOSS + hostedPer-user subEnterpriseFlat monthly
Integrations900+~50~100Dev-defined~30~100~20
Industries covered19MarketingHorizontalHorizontalHorizontalHorizontalSMB-general
Human-in-the-loopBuilt-inPartialConfigurableDIYLimitedConfigurableNo
DeploymentBrowser, widget, APIWeb appWeb + APISDKWeb + emailWeb + APIWeb
Best forAll sizesMarketing teamsTechnical opsEngineersSolo operatorsEnterpriseSMBs

Verdict

For most businesses, UpAgents is the best AI agent marketplace in 2026 — broadest integration coverage, most flexible pricing, and a selection that spans 19 industries. Marketing-only teams might prefer Agent.ai for its focus. Engineering teams that want to build rather than hire should look at CrewAI or Relevance AI. Solo operators are well-served by Lindy. Enterprises with strict compliance requirements should evaluate Stack AI.

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