Updated October 2026

Best AI Agent Marketplaces in 2026

Eight places to find AI agents, compared: what each one is, who it is built for, how pricing works, and where it falls short. UpAgents is one of them, so we have put it last and kept its entry to the facts.

How we ranked them

The ranking is for a business that wants an AI agent doing a real job today. We weighed five things: how well the platform fits a specific job, how much setup it takes, whether you can try it before paying, how clear the pricing is, and how mature the product is. Descriptions are kept general on purpose: features and prices change often, so check each vendor's site before you decide.

New to the category? Start with what an AI agent marketplace is.

The ranking

1.
Agent.ai
Open directory
An open network of AI agents published by many creators.
Strengths
Wide choice of small, ready-made agents for marketing, sales and research tasks. Easy to browse and run without setup, and anyone can publish an agent with its no-code builder.
Weaknesses
Quality varies from creator to creator. Most agents run a single task on what you type in rather than working inside your own tools.
Pricing
Free to start. Check agent.ai for current usage limits.
Best for
Trying many small agents quickly to see what AI can take off your plate.
2.
OpenAI GPT Store
Open directory
A directory of custom GPTs that run inside ChatGPT.
Strengths
A very large selection, and it runs inside ChatGPT, which many people already use every day. Building your own GPT needs no code.
Weaknesses
GPTs are specialised chat assistants: you still steer them turn by turn, and quality varies by creator.
Pricing
Comes with a ChatGPT account. Paid ChatGPT plans raise usage limits.
Best for
ChatGPT users who want a specialised assistant for a recurring task.
3.
Relevance AI
Builder platform
Low-code platform for building AI agents and teams of agents.
Strengths
A capable builder with templates and connections to common business tools. Good for teams that want agents shaped around their own process.
Weaknesses
You build and maintain the agents yourself, and the learning curve is real.
Pricing
Free tier, then tiered subscriptions.
Best for
Operations teams with the time and skills to build their own agents.
4.
Lindy
Builder platform
No-code AI assistants for email, meetings, scheduling and CRM work.
Strengths
Quick to set up from templates, with strong email and calendar automation for individuals and small teams.
Weaknesses
Built around personal and small-team productivity. You still configure each assistant yourself.
Pricing
Free tier, then paid plans.
Best for
Solo operators, executives and small teams automating their own admin.
5.
Stack AI
Builder platform
No-code platform for building AI agents and workflows in larger companies.
Strengths
Visual builder with a strong focus on security and compliance, which suits regulated industries.
Weaknesses
Builder-first and enterprise-oriented, so it is more than a small team needs for one job.
Pricing
Enterprise-focused plans. Check the site for current options.
Best for
Enterprise teams building compliant AI workflows in-house.
6.
CrewAI
Developer framework
Open-source framework for orchestrating teams of AI agents, plus a managed platform.
Strengths
Flexible multi-agent orchestration with an active open-source community. Full control for engineers.
Weaknesses
Developer-first: there is nothing to browse and hire, and deploying an agent takes engineering work.
Pricing
The open-source framework is free; the managed platform has paid plans.
Best for
Engineering teams building custom multi-agent systems.
7.
Sintra
Bundled helpers
A bundle of themed AI helpers for small business tasks.
Strengths
Friendly for non-technical owners: helpers for social posts, copywriting, support replies and similar tasks in one subscription.
Weaknesses
Closer to chat assistants than agents that finish a job end to end.
Pricing
Monthly subscription.
Best for
Small business owners who want a simple set of AI helpers.
8.
UpAgents
Single-vendor catalog
AI agents built and run by UpAgents, each doing one job end to end, plus free browser tools.
Strengths
Nothing to configure: each agent takes your input and returns a finished result. When an agent launches, you can try it free on your own files. Free browser tools are available today.
Weaknesses
Very new: no agent is live yet, and you can only use agents we have built.
Pricing
Priced per agent, shown on each agent's page. Reserving isn't open yet.
Best for
Getting one specific job done without setting anything up.

AI agent marketplace comparison

AI agent marketplaces compared
Marketplace	Type	Who builds the agents	Setup	Try before paying	Pricing	Best for
Agent.ai	Open directory	Many creators	Low	Yes	Free to start	Trying many small agents
GPT Store	Open directory	Many creators	Low	With a ChatGPT account	ChatGPT plans	ChatGPT users
Relevance AI	Builder platform	You	Medium to high	Free tier	Free tier, subscriptions	Ops teams that build
Lindy	Builder platform	You, from templates	Medium	Free tier	Free tier, paid plans	Solo operators, small teams
Stack AI	Builder platform	You	Medium to high	Check vendor	Enterprise plans	Enterprise teams
CrewAI	Developer framework	Your engineers	High	Open source	Free OSS, paid platform	Engineering teams
Sintra	Bundled helpers	Sintra	Low	Check vendor	Monthly subscription	Small business owners
UpAgents	Single-vendor catalog	UpAgents	None	Free tools now; agents coming soon	Per agent	One job, no setup

Verdict

If you want to see what AI agents can do with no commitment, browse Agent.ai or the GPT Store. If you have a process you want automated your way and the time to build it, Relevance AI and Lindy are the most approachable builders. Engineers should start with CrewAI, and enterprises with compliance requirements should evaluate Stack AI. Small business owners who want simple AI helpers can look at Sintra.

If you would rather hand over one specific job and get a finished result back without setting anything up, that is what UpAgents is for. The catalog is small and new, so check whether we have an agent for your job.

AI agent marketplace comparison questions

What is the best AI agent marketplace in 2026?

There is no single best one: it depends on the job and on how much setup you want to do. To browse and try many ready-made agents, Agent.ai and OpenAI's GPT Store are the easiest places to start. To build agents around your own process, look at Relevance AI or Lindy; engineering teams should look at CrewAI, and enterprises with strict compliance needs at Stack AI.

How do AI agent marketplaces differ from each other?

Mainly in who builds the agents and how much setup you do. In open directories many creators publish agents; on builder platforms you assemble your own; developer frameworks need engineers; single-vendor catalogs like UpAgents build and run every agent themselves. Pricing models differ too: free tiers, subscriptions, usage credits and per-result pricing.

Which AI agent marketplace is cheapest?

Most of them have a free way to start, so list price matters less than whether the result is usable. The cheapest option is the one where you can confirm the agent does your job well, on your own work, before you pay.

Can I try an AI agent before paying?

Usually, yes. Agent.ai, Relevance AI and Lindy have free ways to start, the GPT Store works with a ChatGPT account, and CrewAI's framework is open source. On UpAgents the free browser tools work now, and the first agents are coming soon.

Is UpAgents an AI agent marketplace?

UpAgents is a single-vendor catalog: we build and run every agent ourselves, and each one does one job end to end. It is not an open directory where anyone can publish. Payments go through Whop.