Side-by-side comparison
Compare AI Tools
Pick two to five tools. Every cell comes from a verified record; anything unverified says so. There is no overall winner — the right choice depends on your task, budget and technical needs.
| Criterion | CrewAI | LangChain | LlamaIndex | Langfuse |
|---|---|---|---|---|
| Provider | CrewAI | LangChain | LlamaIndex | Langfuse |
| What it is for | Open-source Python framework for teams of role-based AI agents, with a hosted platform for building and running them. | Open-source framework for building LLM apps and agents that work with many model providers. | Open-source framework for connecting LLMs to your data, plus the commercial LlamaParse document platform. | Open-source tracing, prompt management and evaluation for LLM applications, self-hosted or in the cloud. |
| Latest confirmed model | — | — | — | — |
| Main capabilities |
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| Free plan | Yes | Yes | Yes | Yes Your infrastructure |
| Cheapest paid plan | No monthly list price | LangSmith Plus: $39/mo Per seat per month, then pay as you go | LlamaParse Starter: $50/mo | Core: $29/mo |
| API access | Limited · docs (opens in a new tab) | Limited · docs (opens in a new tab) | Yes · docs (opens in a new tab) | Yes · docs (opens in a new tab) |
| Learning curve | Some experience helps | Some experience helps | Some experience helps | Some experience helps |
| Last verified | Oct 19, 2026 | Oct 19, 2026 | Oct 19, 2026 | Oct 19, 2026 |
How to choose
Start from the rows that matter for your job: a free plan and learning curve for casual use; API access, rates and data terms for building products; context window and modalities for long documents or images. Provider claims are labelled as such; we do not rank.
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