compare
FastGPT vs Sim
The same facts for both, read from GitHub every night, and the relation a person reviewed.
| Fact | FastGPT | Sim |
|---|---|---|
| Language | TypeScript | TypeScript |
| Licence | Other | Apache-2.0 |
| Stars | 30k | 30k |
| Latest | v4.17.1 | v0.9.14 |
| Last push | 2026-10-06 | 2026-10-06 |
| Release cadence | about 11 days between releases | about 1 day between releases |
| Active contributors | 38 commit authors on the default branch in the last 90 days | 7+ commit authors on the default branch in the last 90 days |
| Flags | none | none |
How they relate
Both replace Microsoft Copilot Studio. Alternatives to Microsoft Copilot Studio →
PartialFastGPTKnowledge-base chatbots and visual workflows, served behind an OpenAI-compatible API.
PartialSimA visual builder for agent workflows with many integrations, on your own server.
FastGPT
- v4.17.12026-09-30更新 fastgpt-app（FastGPT 主服务）镜像 tag: v4.17.1
- v4.17.02026-09-11升级到 V4.17.0 前，请先升级到 V4.16.2，并执行完成 V4.16.x 版本要求的所有旧升级脚本。 V4.17.0 的自动升级机制只管理从本版本开始登记的新任务，不会补执行此前版本的历史脚本。
- v4.16.22026-09-03由于 branch 选择错误，重新选择分支发布。
- v4.16.12026-08-21启用 Agent Sandbox 时，请在 fastgpt-app 和 fastgpt-pro 中同步检查以下配置。4.16.1 使用完整的运行态镜像地址：
- v4.16.02026-08-164.16.0 需要依赖 proxy 进行静态资源代理访问，如果网关支持 ws 和 http 在同一个端口，则可以只开放一个端口。如果不支持，可以通过设置 PREVIEW_PORT 来设置 http 访问端口。
Sim
- v0.9.142026-10-05fix(mothership): preserve workflow identity in background confirmations (#8615)
- v0.9.132026-10-04feat(library): Slack AI Agent Security: Permissions, Data, and Audit Guide (#8600)
- v0.9.122026-10-03feat(forks): compare last synced source deployments (#8586)
- typescript-sdk-v0.2.12026-10-03TypeScript SDK v0.2.1
- python-sdk-v0.2.12026-10-03Python SDK v0.2.1
FastGPT
✓ signed The latest release, v4.17.1, carries a signature GitHub verified.
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Sim
✓ signed The latest release, v0.9.14, carries a signature GitHub verified.
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