Best AI Agent Builders in 2026
Updated
In short: Microsoft Copilot is ranked #1 of 35 as of 4 October 2026, ahead of Houston and Agentforce Vibes. The best-ranked option with a free plan is Houston. The lowest first paid tier on this page is Dust at €2/mo.
Build agents and workflows around the tasks you want to automate, then compare the controls and capabilities each builder lists. App connectors and included agents indicate what can be brought into a workflow; scheduled runs and run limits help you assess how execution is handled. Human approvals may matter when you want review points, while web browsing is relevant when tasks require online information. Microsoft Copilot, Houston, and Agentforce Vibes are among the entries to compare. Check free-plan availability and the paid-from price alongside these features to gauge which options align with your needs and budget.
35 AI agent builders ranked on what their makers publish — plans and prices, free tiers, platforms and the facts on their own pages.
14 of the 25 here have a free tier you can use, 0 have open-source code on record, and 0 have full bars: free, open, on most of your devices and documented.
| # | App | Signal | Free tier | Open code | Devices | From | Score |
|---|---|---|---|---|---|---|---|
| 1 | Microsoft CopilotWeb · Windows · Mac · Android · iPhone | Three bars | — | 5 of 6 | $8.33/mo | 6.8 | |
| 2 | HoustonWeb · Windows · Mac · Linux | Three bars | — | 4 of 6 | $12/mo | 6.6 | |
| 3 | Agentforce VibesWeb · Android · iPhone | Three bars | — | 3 of 6 | $125/mo | 6.5 | |
| 4 | Automation Anywhere Document AutomationWeb · Windows · Mac · API | Three bars | — | 3 of 6 | Free | 6.5 | |
| 5 | WordwareWeb · iPhone | Two bars | — | 2 of 6 | $29/mo | 6.5 | |
| 6 | DustWeb · API · Extension | Two bars | — | 1 of 6 | €2/mo | 6.4 | |
| 7 | Falcon BuilderWeb · API | Two bars | — | 1 of 6 | $29/mo | 6.4 | |
| 8 | MindStudioWeb · Self-hosted · API · Extension | Two bars | — | 1 of 6 | $20/mo | 6.4 | |
| 9 | Relevance AIWeb | Two bars | — | 1 of 6 | $19/mo | 6.4 | |
| 10 | StackAIWeb · Self-hosted · API · Extension | Two bars | — | 1 of 6 | Free | 6.4 | |
| 11 | Workato Agent StudioWeb · API | Two bars | — | 1 of 6 | $75/mo | 6.4 | |
| 12 | KopernWeb | Two bars | — | 1 of 6 | $79/mo | 6.3 | |
| 13 | LangChainSelf-hosted · API | Two bars | — | 0 of 6 | $39/mo | 6.3 | |
| 14 | SmythOSWeb | Two bars | — | 1 of 6 | $39/mo | 6.3 | |
| 15 | UiPath Test CloudWeb · Windows · Mac · Self-hosted · API | Two bars | — | — | 3 of 6 | — | 5.6 |
| 16 | SEPIAWeb · Windows · Mac · Linux · Android · iPhone · Self-hosted | One bar | — | — | 6 of 6 | — | 5.4 |
| 17 | Kore.aiWeb | No signal | — | — | 1 of 6 | — | 5.2 |
| 18 | Aisera AI Agent StudioWeb | No signal | — | — | 1 of 6 | — | 5.1 |
| 19 | augLabWeb | No signal | — | — | 1 of 6 | — | 5.1 |
| 20 | Forge by FocaloidWeb | No signal | — | — | 1 of 6 | — | 5.1 |
| 21 | Frederick AIWeb | No signal | — | — | 1 of 6 | — | 5.1 |
| 22 | Glean Agent BuilderWeb | No signal | — | — | 1 of 6 | — | 5.1 |
| 23 | Harmony AI Agent BuilderWeb | No signal | — | — | 1 of 6 | — | 5.1 |
| 24 | QuickBlox Chat APIWeb | No signal | — | — | 1 of 6 | — | 5.1 |
| 25 | ServiceNow AI Agent StudioWeb | No signal | — | — | 1 of 6 | — | 5.1 |
Is your app on this list?
Numbered spots on this list can be sponsored. They are labelled, and the editorial order and scores never change for payment.
Questions about this list
Which AI agent builder is ranked first on Freedom251?
Microsoft Copilot is ranked #1 of 35 with a score of 6.8. Houston is second and Agentforce Vibes third.
How many of these have a free plan?
14 of the 25 on this page publish a free plan on their own pricing pages.
Which is the cheapest paid option?
On this page, Dust has the lowest first paid tier we found: €2/mo.
How is this list ranked?
Ranked free-and-open first: a usable free tier and open-source code, then the platforms it runs on and its documentation. Paid placements never change a rank.