The Best AI Agent Platforms (2026)
4 AI agent-building platforms — n8n, Dify, Lindy and Relevance AI — compared on what actually splits them: open-source and self-hostable vs. closed-source and cloud-only, and flat published pricing vs. metered credits that are easy to misjudge.
All four of these call themselves an "AI agent platform," but they split on two real axes, not one ranking. n8n and Dify are both open (fair-code and Apache-2.0-derived, respectively) and self-hostable via Docker — n8n started as a visual workflow-automation tool with AI-agent nodes layered on top, so its scope is any automation, not agents specifically; Dify started as an LLM-app platform with a built-in RAG pipeline, so its scope is building and shipping model-backed apps and agents. Lindy and Relevance AI are both closed-source and cloud-only. Lindy is the simplest on-ramp: a no-code builder for single AI "employees" that automate recurring inbox, meeting and CRM busywork. Relevance AI is the more production-grade of the two, purpose-built for orchestrating multi-agent "workforces" with a cost-optimising LLM router, evals, tracing and RBAC/SSO.
One pattern is worth weighing across all four before you commit: n8n's Cloud tiers and Dify's Cloud tiers both publish flat monthly or annual prices. Lindy and Relevance AI both meter usage in credits instead, and that metering has a real, documented cost: independent reviews repeatedly flag Lindy's overage charges as a billing surprise, and Relevance AI's own dual "Actions plus Vendor Credits" meter is easy to misjudge on AI-heavy agents (its pricing page now foregrounds a custom Enterprise quote over self-serve numbers). None of that makes the credit-metered platforms worse — Relevance AI in particular ships production controls the flat-rate pair does not — but it means the real cost of scaling up is a question worth modelling before you buy, not just the number on the pricing page.
How we ranked these
Every entry is a Published listing that already cleared this site's per-listing quality gate — sourced facts, admitted weaknesses, a "best for" and a "not for," re-verified on a rolling cadence (see /methodology). agent-platforms (Build group) clears the same 4-listing minimum as the four Agents-group rankings above, and — unlike coding-agents and frameworks — was never named as already-adequately-covered by the flagship grouping alone, so this is a genuine, previously unbuilt gap rather than a revisit of a settled call. Sierra also carries the agent-platforms tag but is excluded here: it is a vertical customer-support product, already ranked as the lead entry of /best-ai-support-agents, not a general-purpose agent-building platform. The ordering runs open-and-automation-first (n8n), through open-and-app/RAG-first (Dify), to closed-and-simplest (Lindy), to closed-and-most-production-grade (Relevance AI), grouped around the openness and pricing-predictability splits described above rather than a single "best overall" pick, since the four serve different jobs. The live score chip on every card (evidence, honesty, depth, freshness) is computed the same way as that tool's own listing page.
The ranking
Editor’s pick
#1
n8nSource-available workflow automation with native AI-agent nodes, self-hostable and integration-rich.
7.0Best forOps and automation teams who want to build agentic workflows visually while keeping data on self-hosted infrastructure.
n8n is fair-code (source-available, not OSI-approved) and free to self-host, with a visual canvas, 400+ app integrations and native AI-agent nodes so an agent can actually take actions — update a CRM, post to Slack, hit an API — not just answer a question. Cloud pricing is flat and published, from €20/month. The trade-off is scope: it is an automation platform an agent plugs into, not an agent-first product, and deeply branching agent logic can get harder to read on a canvas than in code.
- #2
DifyOpen-source, visual platform for building production LLM apps and agents, self-host it or run it in the cloud.
7.1Best forDevelopers and teams who want an open-source, self-hostable platform to build RAG apps and agents with full data control.
Dify is open-source (Apache-2.0-derived, 149K+ GitHub stars) and self-hostable via Docker, with a built-in RAG pipeline, model-agnostic runtime across hundreds of LLMs, and a visual Workflow Studio that publishes apps as a hosted page, a REST API, an embed or an MCP tool. Cloud pricing is flat and published too, from $590/year. Its licence carries conditions beyond pure Apache-2.0 (check before commercial resale), and deeply bespoke agent logic can still be easier in a code-first framework.
- #3
LindyAn AI executive assistant you text over iMessage or SMS, built on a no-code agent platform still available underneath.
6.6Best forBusy professionals and non-technical sales, support and ops teams who want an AI assistant they can just text — with a no-code agent builder still available if they want to construct custom workflows.
Lindy is the most approachable of the four — describe an agent in plain language, wire a trigger and some of its 100+ integrations, and it runs recurring email, meeting and CRM work on its own, with human-in-the-loop approval by default. There is no permanent free plan, only a 7-day trial, and usage is metered in credits — independent reviews repeatedly flag overage charges as a billing surprise once real usage ramps up.
- #4
Relevance AIBuild and run an "AI workforce", teams of no-code agents that do real sales, ops and research work.
7.4Best forRevenue and ops teams that want to build and run coordinated multi-agent workforces in production, with enterprise controls.
Relevance AI is purpose-built for coordinated multi-agent teams rather than a single bot, with the production plumbing — a cost-optimising LLM router across Claude/GPT/Gemini, evals, tracing, approvals and RBAC/SSO — that separates a demo from something to trust with live pipeline. Pricing is a dual meter (Actions plus Vendor Credits) its own listing calls easy to misjudge on AI-heavy agents, and the flagship Bosh BDR agent is a custom, multi-week enterprise onboarding, not a self-serve click.
Side by side
All 4 compared. Scroll the table sideways, the fact column stays pinned →
| Feature | n8n | Dify | Lindy | Relevance AI |
|---|---|---|---|---|
| Description | Source-available workflow automation with native AI-agent nodes, self-hostable and integration-rich. | Open-source, visual platform for building production LLM apps and agents, self-host it or run it in the cloud. | An AI executive assistant you text over iMessage or SMS, built on a no-code agent platform still available underneath. | Build and run an "AI workforce", teams of no-code agents that do real sales, ops and research work. |
| Category | Agent platforms | Agent platforms | Agent platforms | Agent platforms |
| Pricing | Free | Free | $49.99 / month | Free |
| Tier | Listed | Listed | Listed | Listed |
| API | Yes | Yes | - | Yes |
| Tags |
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Frequently asked questions
- What is the best AI agent platform?
- It depends on how much control you need over hosting and code. For an open, self-hostable automation platform with AI-agent nodes bolted on, n8n. For an open, self-hostable platform built around LLM apps and RAG specifically, Dify. For the simplest no-code on-ramp to a single AI "employee," Lindy. For production-grade, coordinated multi-agent "workforces" with enterprise controls, Relevance AI.
- Which AI agent platforms are open-source and self-hostable?
- n8n (fair-code, source-available, free to self-host) and Dify (Apache-2.0-derived, 149K+ GitHub stars, self-hostable via Docker). Lindy and Relevance AI are both closed-source and cloud-only, with no self-hosting option.
- Why isn’t Sierra on this list if it’s tagged as an agent platform?
- Sierra is a vertical customer-support agent product — an enterprise "agent OS" for resolving customer issues — not a general-purpose platform for building an arbitrary agent. It is already ranked as the lead entry of the dedicated /best-ai-support-agents page instead of appearing here too.
- Which of these platforms has predictable, flat pricing?
- n8n and Dify both publish flat monthly or annual Cloud tiers. Lindy and Relevance AI both meter usage in credits instead — independent reviews flag Lindy’s overage charges as a recurring surprise, and Relevance AI’s own dual "Actions plus Vendor Credits" meter is easy to misjudge on AI-heavy agents.
- Do any of these AI agent platforms have a free plan?
- n8n (free Community self-hosted edition), Dify (free Community self-hosted edition, plus a free Sandbox on Cloud) and Relevance AI (a free self-serve tier with a monthly Actions allowance) all have a genuine free option. Lindy does not — only a 7-day trial.