Comparison
| Tool | Price from | Free plan | Category |
|---|---|---|---|
 Mastra | 250 USD/mo | yes | Website & app builders |
 LangChain | 39 USD/mo | yes | Website & app builders |
 Gemini Enterprise Agent Platform | 0,75 USD | ? | Website & app builders |
 Pipedream | 99 USD/mo | yes | Website & app builders |
 Langflow | not listed | yes | Website & app builders |
 Dify | 590 USD/yr | yes | Website & app builders |
 JetBrains Air | 100 EUR/yr | ? | Website & app builders |
 Replit | 20 USD/mo | yes | Website & app builders |
 Capacity | 25 USD/mo | trial | Website & app builders |
Each alternative in short
1. LangChain
Open agent engineering platform for building, testing, deploying and monitoring AI agents, aimed at engineering teams.
Yes, there is a free plan. Developer plan: free, 1 seat, up to 5k base traces per month, then pay-as-you-go, community support. Open source frameworks are free to use.
2. Gemini Enterprise Agent Platform
Google Cloud platform for developers to build, scale, govern and optimize AI agents on Gemini models.
The vendor does not state this clearly on the homepage or pricing page.
3. Pipedream
Managed integration layer that lets AI agents and apps call 10,000+ prebuilt tools and 3,000+ APIs with per-user auth handled for them.
Yes, there is a free plan. Free plan: full access to build and test in development, all features, 3,000+ connectors, unlimited team members, community support. Production use requires Startup.
4. Langflow
Low-code builder for AI agents, RAG apps and MCP servers, with visual flows you can extend in Python.
Yes, there is a free plan. Get Started for Free; a free cloud account is offered for deployment. Open source version available on GitHub.
5. Dify
Visual platform for building, testing and deploying AI agents, workflows and RAG pipelines, for teams going from prototype to production.
Yes, there is a free plan. Community Edition is free to self-host with Docker (source-available). The cloud plans listed on the pricing page start with paid tiers; a sandbox tier is referenced in the pricing text but its details are not fully shown.
6. JetBrains Air
One system for building software with agents, working with Claude, Codex, Junie, Copilot and other ACP-compatible agents, for developers and teams.
The vendor does not state this clearly on the homepage or pricing page.
7. Replit
AI platform where you describe an app or website in plain language and it builds, hosts and publishes it, with no coding needed.
Yes, there is a free plan. Free Mode lets you brainstorm and create without token costs; the first prompt is free and Free Mode allows up to 30 hours of chat and 60 projects on the Core plan.
8. Capacity
No-code AI builder that turns a plain-language app idea into a live app with accounts, payments and a custom domain, for non-developers.
There is a free trial. The first app is free, per the homepage. The demo can be tried without signing up.
FAQ
What is the best alternative to Mastra?
The most popular option in the same category is LangChain. See the comparison table above.