AI agent builder reviews
10 tools, one page each: the verdict first, then plans, limits, the billing unit and the catch.
n8n review
One run costs one execution, whether the workflow has 3 steps or 300.
Make review
The cheapest hosted way to wire 3,500 apps together, with agents on every plan.
Zapier review
If an app exists, Zapier probably connects it: 9,000+ of them.
Lindy review
Less a builder than a teammate you brief in Slack or by text.
Gumloop review
One plan, unlimited seats, and a meter that follows model list prices.
Botpress review
A support agent with a helpdesk attached, priced per conversation.
Microsoft Copilot Studio review
The obvious pick inside a Microsoft tenant, and a detour outside one.
Relevance AI review
Multi-agent "workforces" with evaluations, sold through a sales call.
Voiceflow review
Chat and voice agents with real release tooling, behind a demo.
Flowise review
The team wound Flowise down in 2026. The code stays, the support does not.
Compared, without a full review yet
Activepieces, Langflow, StackAI, Dify are scored with the same formula and sit in the rankings. Their rows link to the comparison tool.
| Tool | Score | Entry price | Billed in | Free plan or trial | Integrations | Self-hosting | Official page |
|---|---|---|---|---|---|---|---|
 ActivepiecesFrom $20/mo · checked Nov 15, 2026 | 9.4/10 | From $20/mo | Credits (one per run) | Free plan | 770+ | Yes, limited | Check price at Activepieces |
 LangflowFree, open source · checked Nov 15, 2026 | 9.0/10 | Free, open source | No platform fee | Free self-hosted edition | Not stated | Yes | Get Langflow free |
 StackAIPrice on request · checked Nov 15, 2026 | 8.8/10 | Price on request | Runs | Free plan | 500+ | Enterprise only | See plans at StackAI |
 DifyFrom $59/mo · checked Nov 15, 2026 | 8.7/10 | From $59/mo | Message credits | Free plan | Not stated | Yes | Check price at Dify |