SmythOS is an AI agent platform with a visual workflow builder and prompt-based agent editing.
Free plan Open source From $39 a month AndroidiPhone & iPadWebWindowsMacLinux+2
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Best AI Agent Platforms 2026
Facts read 27 Sep 2026 – 15 Oct 2026
SmythOS leads this list of 73 (record score 6.5, free plan). Vellum is next (record score 6.4, free plan), and Dify is the next highest-placed with a free plan (record score 6.0).
AI agent platforms give you a way to compare tools for building or providing AI agents. This guide is for buyers weighing access, deployment and the features a platform lists.
The standings: top 10
| Name | In a line | Record score | Price from | Try it free | Runs on | Facts read |
|---|---|---|---|---|---|---|
| 01 SmythOS | SmythOS is an AI agent platform with a visual workflow builder and prompt-based agent editing. | 6.5 | $39 a month | Free plan | Android, iPhone & iPad, Web, Windows | 14 Oct 2026 |
| 02 Vellum | Vellum is an AI assistant that can save context and use custom skills to work with your files and computer. | 6.4 | $30 a month | Free plan | Android, iPhone & iPad, Web, Windows | 15 Oct 2026 |
| 03 Dify | Dify suits teams building AI applications that need configurable workflows, knowledge retrieval or multiple publishing options. | 6.0 | $590 a year | Free plan | Web, Windows, Mac, Linux | 15 Oct 2026 |
| 04 Microsoft Copilot | Copilot suits people seeking an AI assistant across web and desktop or mobile platforms, including those who want it alongside Microsoft 365 apps. | 6.0 | $99.99 a year | Free plan | Android, iPhone & iPad, Web, Windows | 27 Sep 2026 |
| 05 Voiceflow | Voiceflow is an AI agent platform available on web, mobile, and self-hosted deployments. | 6.0 | $972 a year | Free plan | Android, iPhone & iPad, Web, API | 14 Oct 2026 |
| 06 Retool | Retool identifies developers, business engineers, analysts, and operations teams as people who can build with it. | 5.9 | $10 a month | Free plan | Android, iPhone & iPad, Web, API | 30 Sep 2026 |
| 07 Workato Agent Studio | Workato Agent Studio runs on the web, iOS, Linux, macOS, and Windows, with API access. | 5.9 | Free plan | Free plan | iPhone & iPad, Web, Windows, Mac | 14 Oct 2026 |
| 08 QuickBlox Chat API | QuickBlox offers chat SDKs and UI kits for in-app messaging, with moderation tools for shared media and text. | 5.8 | $107 a month | Free plan | Android, iPhone & iPad, Web, API | 8 Oct 2026 |
| 09 Google Agent Development Kit | 5.6 | Free plan | Free plan | Web, Windows, Mac, Linux | 15 Oct 2026 | |
| 10 Camunda | 5.5 | Free plan | Free plan | Web, Windows, Mac, Linux | 14 Oct 2026 |
Compare free plans with free trials, then check paid-from pricing, deployment model and support for visual building, multiple agents, knowledge grounding, voice and human handoff. Check whether a platform supports the environment you need.
02
Vellum
Vellum is an AI assistant that can save context and use custom skills to work with your files and computer.
AndroidiPhone & iPadWeb+5 Record6.4 Visit
03
Dify
Dify suits teams building AI applications that need configurable workflows, knowledge retrieval or multiple publishing options.
WebWindowsMac+4 Record6.0 Visit
04
Microsoft Copilot
Copilot suits people seeking an AI assistant across web and desktop or mobile platforms, including those who want it alongside Microsoft 365 apps.
AndroidiPhone & iPadWeb+2 Record6.0 Visit
05
Voiceflow
Voiceflow is an AI agent platform available on web, mobile, and self-hosted deployments.
AndroidiPhone & iPadWeb+2 Record6.0 Visit
6
Retool
AndroidiPhone & iPadWeb+2 $10 a month Record5.9 Visit Retool identifies developers, business engineers, analysts, and operations teams as people who can build with it.
7
Workato Agent Studio
iPhone & iPadWebWindows+3 Free plan Record5.9 Visit Workato Agent Studio runs on the web, iOS, Linux, macOS, and Windows, with API access.
8
QuickBlox Chat API
AndroidiPhone & iPadWeb+2 $107 a month Record5.8 Visit QuickBlox offers chat SDKs and UI kits for in-app messaging, with moderation tools for shared media and text.
11
Houston
WebWindowsMac+1 $12 a month, billed yearly Record5.5 Visit Houston lets teams coordinate AI agent tasks across connected tools and models on desktop or the web.
12
Lindy
WebBrowser extension $29.99 a month Record5.5 Visit Lindy suits individuals and teams wanting connected workflow automation, scheduled routines, integrations, and conditional or webhook-driven tasks.
13
Flowise
WebWindowsMac+3 $35 a month Record5.4 Visit Flowise offers visual tools for AI agents and LLM workflows on the web, desktop, Linux, or self-hosted setups.
14
Workato Agentic
WebAPI Free plan Record5.4 Visit It suits organizations building governed AI workflows across finance, sales, operations, and connected business systems.
15
LangSmith
WebWindowsMac+3 $39 usage-based Record5.3 Visit LangSmith helps teams build and improve AI agents, with evaluations for datasets and live interactions.
16
Wordware
iPhone & iPadWeb $29 a month Record5.3 Visit Sauna may suit teams looking to use shared work context for suggested or configured actions.
17
Falcon Builder
WebAPISelf-hosted $29 a month Record5.2 Visit Falcon Builder creates and deploys AI agents as chat, form, website, WhatsApp, and SMS experiences.
18
Helios
WebMacLinux+1 Free plan Record5.1 Visit Helios gives teams cloud-based AI agents with connected tools and scheduled workflows.
19
Meya
AndroidiPhone & iPadWeb+1 $99 a month Record5.1 Visit Meya suits teams building conversational apps for websites or mobile apps, including engineers who want to customize flows and integrations.
20
Relevance AI
Web $19 a month, billed yearly Record5.1 Visit Relevance AI suits teams or individuals looking to build specialist AI agents and connect them to app workflows.
21
Yak
WebAPI $800 a month Record5.0 Visit Yak embeds AI assistants in software products to answer questions and use connected APIs.
23
Botpress
WebAPI $150 a month, billed yearly Record4.9 Visit Botpress creates AI bots with visual building, knowledge-base answers, and deployment across multiple channels.
Before you choose
Check how you can try it
A free plan and a free trial are different ways to start. Check which one a platform offers and what its listed paid-from price is before comparing costs.
For example, SmythOS lists a free plan and paid pricing from $39 per user per month. Vellum lists a free plan and paid pricing from $30 per month.
Match deployment to your setup
Compare the deployment model and platform availability against the environment you plan to use. Options represented in this category include web, API, self-hosted, macOS, Linux and Windows.
If you need a specific environment, confirm its availability on the platform's listing before choosing.
Compare the agent features
Look at whether the platform lists a visual agent builder, multi-agent support or knowledge grounding. These fields help you compare how a tool describes building and supporting agents.
Voice agent support and human handoff are also comparison fields. Consider which of these capabilities matter for your intended setup.
Questions
What should I compare when choosing an AI agent platform?
Compare free access, paid-from pricing, deployment model, visual building, multi-agent support, knowledge grounding, voice support and human handoff.
Is a free plan the same as a free trial?
No. A free plan and a free trial are separate access options. Check the platform listing to see which it offers.
Can I use an AI agent platform through an API?
API is one of the platform availability fields in this category. Check the individual listing to confirm API availability for a platform.
Can I self-host an AI agent platform?
Self-hosted is one of the deployment options represented in this category. Check the individual platform listing for its deployment model.
What does multi-agent support mean in this comparison?
Multi-agent support is a listed comparison field. Use the platform details to see whether it supports this capability.
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