# Best Agent platforms — Open models

> Source: https://theagentsindex.com/best/agent-platforms/open-models (curated, quality-gated, re-verified)

12 of 20 agent platforms have a confirmed yes for “Open models”. 4 are qualified or tier-scoped, 1 are confirmed no, and 3 remain not established. Only confirmed yes answers appear in this set; an unknown is never treated as a negative.

| # | Name | What it is | Pricing | API |
| --- | --- | --- | --- | --- |
| 1 | [Agno](https://theagentsindex.com/agno.md) | Python SDK, self-hosted AgentOS runtime and hosted control plane for building and running agents | freemium | Yes |
| 2 | [Botpress](https://theagentsindex.com/botpress.md) | Build, deploy and run AI agents from a visual studio, a TypeScript ADK, or a chat-based builder. | freemium | Yes |
| 3 | [Dify](https://theagentsindex.com/dify.md) | Open-source platform for building agentic workflows, RAG pipelines and agents, on cloud or self-hosted | freemium | Yes |
| 4 | [ElevenLabs ElevenAgents](https://theagentsindex.com/elevenlabs-conversational-ai.md) | Voice and chat agent platform built on ElevenLabs speech models, deployed to web, mobile and telephony. | freemium | Yes |
| 5 | [Glean](https://theagentsindex.com/glean.md) | Enterprise Work AI platform: indexes company apps into a permission-aware graph and runs agents on that context. | paid | Yes |
| 6 | [MindStudio](https://theagentsindex.com/mindstudio.md) | Visual builder for AI agents, with a typed SDK, CLI and MCP server over 200+ models | freemium | Yes |
| 7 | [n8n](https://theagentsindex.com/n8n.md) | Workflow automation platform for building AI agents on a visual canvas, self-hosted or on n8n Cloud. | freemium | Yes |
| 8 | [OpenClaw](https://theagentsindex.com/openclaw.md) | Self-hosted, MIT-licensed gateway that runs AI agents across chat apps, a browser UI, and the terminal. | paid | Yes |
| 9 | [Relevance AI](https://theagentsindex.com/relevance-ai.md) | Enterprise platform for building, running and governing teams of specialist AI agents | paid | Yes |
| 10 | [Sierra](https://theagentsindex.com/sierra.md) | Conversational AI platform for customer-facing agents across voice, chat, email and messaging, priced per outcome. | paid | No |
| 11 | [Sim](https://theagentsindex.com/sim.md) | Open-source AI workspace for building, deploying and governing AI agents across 1,000+ integrations. | freemium | Yes |
| 12 | [Vellum](https://theagentsindex.com/vellum-ai.md) | Personal AI assistant with its own identity, memory and installable skills; open-source runtime, cloud or self-hosted | freemium | Yes |

## Methodology

Projected from the live listing datasheets using the tenant’s “Can it run open-weight models?” axis. Membership requires a sourced yes; partial and unknown answers are reported above but excluded from the ranking. Entries retain the directory’s paid-tier ordering, visibly labelled on every promoted card.