Best AI Agents

Letta

Platform for agents with long-term memory

Platform for building stateful agents that keep memory across sessions. It grew out of the open source MemGPT research project and includes an open source server and a hosted service.

memorystatefulmemgptopen-source

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Model Context Protocol

Agent infra

Open protocol for connecting models to tools and data

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Agent2Agent Protocol

Agent infra

Open protocol for agents to talk to each other

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Arize Phoenix

Agent infra

Open source tracing and evaluation for LLM apps

Open sourceobservabilityevals

Composio

Agent infra

Tool and integration layer for agents

Freemiumtoolsintegrations

E2B

Agent infra

Cloud sandboxes for running agent-generated code

Open sourcesandboxcode-execution

Firecrawl

Agent infra

Turns websites into clean data for LLMs

Open sourcescrapingcrawling