Mastra vs OpenFang
Side-by-side comparison of two agent options that often come up together when people are choosing between self-hosted frameworks, managed assistants, and extensible AI tooling.
Open source23k stars
Mastra
TypeScript-first agent framework with observational memory and workflow orchestration
Open source17k stars
OpenFang
Open-source Agent OS built in Rust — autonomous agents on schedules with 40 channel adapters
Category
Mastra
OpenFang
Tagline
TypeScript-first agent framework with observational memory and workflow orchestration
Open-source Agent OS built in Rust — autonomous agents on schedules with 40 channel adapters
Deployment
Self-Hosted
Self-Hosted
Pricing
Free to use, with optional model or infrastructure costs if you self-host.
Free to use, with optional model or infrastructure costs if you self-host.
Channels
Web, CLI
Telegram, Discord, Slack, WhatsApp, Web
Open source
Yes
Yes
Privacy
Good privacy posture for most teams, especially when self-hosted or carefully configured.
Very strong privacy posture with local-first or tightly controlled deployment options.
Mastra pros
- TypeScript-first — rare in the agent framework space (most are Python)
- Observational Memory — automatically tracks and surfaces agent reasoning patterns
- From the Gatsby team — proven track record building developer-facing OSS
OpenFang pros
- Open source with transparent code and flexible deployment options.
- Security posture is strong for sensitive workflows.
- Strong privacy story for users who care where data runs.
Mastra cons
- TypeScript-only — not suitable for Python-heavy stacks
- Younger ecosystem compared to LangChain or CrewAI
- Primarily a development framework — not a ready-to-use personal assistant
OpenFang cons
- Trade-offs are moderate rather than severe, but it does not stand out sharply on every dimension.
Mastra gotchas
- You should expect ongoing hosting, uptime, and secret-management work if you deploy it for real users.
OpenFang gotchas
- You should expect ongoing hosting, uptime, and secret-management work if you deploy it for real users.
Not sure which one fits you?
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