Comparison
| Tool | Price from | Free plan | Category |
|---|---|---|---|
 Vapi | 29 USD/mo | trial | AI agents |
 Flowise | 35 USD/mo | yes | AI agents |
 Microsoft Foundry | not listed | ? | AI agents |
 Synthflow | 30000 USD/yr | no | AI agents |
 Gumloop | 37 USD/mo | trial | AI agents |
 CrewAI | not listed | yes | AI agents |
 Relevance AI | not listed | ? | AI agents |
 Warp | 20 USD/mo | yes | AI agents |
 Manus | 20 USD/mo | ? | AI agents |
Each alternative in short
1. Flowise
Open source visual platform for building AI agents, multi-agent workflows and RAG chatbots, for developers and small to mid-sized teams.
Yes, there is a free plan. Free plan: 2 flows and assistants, 100 predictions per month, 5MB storage, evaluations and metrics, custom embedded chatbot branding, community support.
2. Microsoft Foundry
Enterprise platform from Microsoft Azure to build, ground, and govern AI apps and agents with a wide model catalog and centralized security.
The vendor does not state this clearly on the homepage or pricing page.
3. Synthflow
Enterprise platform for building and running AI voice agents that answer and make phone calls for sales and support teams.
No - according to the vendor, it is paid only.
4. Gumloop
Multiplayer AI agent builder letting teams create agents with any AI model and integration while IT controls access.
There is a free trial. 14-day free trial of the Pro plan.
5. CrewAI
Enterprise platform for building, running and governing multi-agent AI workflows, for business teams and engineers.
Yes, there is a free plan. Basic plan: visual editor and AI copilot, GitHub integration, 50 workflow executions per month, 2 automations, tracing, LLM testing and guardrails.
6. Relevance AI
Platform for building and running specialist AI agents for sales, customer success, marketing, HR and operations teams.
The vendor does not state this clearly on the homepage or pricing page.
7. Warp
Open platform for running fleets of coding agents across the software development lifecycle, plus an agentic terminal and CLI for developers and teams.
Yes, there is a free plan. Free plan includes core terminal features, Warp Agent CLI access, limited cloud agents access, and bring-your-own AI inference; additional agent usage is at pay-as-you-go rates. Page also mentions qualified teams getting up to $10k in free factory usage.
8. Manus
An AI agent that executes tasks and automates workflows rather than only answering questions, for users who want hands-on help.
The vendor does not state this clearly on the homepage or pricing page.
FAQ
What is the best alternative to Vapi?
The most popular option in the same category is Flowise. See the comparison table above.