Mastra vs Moltis
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 source2.6k stars
Moltis
Security-focused Rust agent with voice support and 15+ TTS/STT providers
Category
Mastra
Moltis
Tagline
TypeScript-first agent framework with observational memory and workflow orchestration
Security-focused Rust agent with voice support and 15+ TTS/STT providers
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
Web, Telegram, Discord, Teams, Voice
Open source
Yes
Yes
Privacy
Good privacy posture for most teams, especially when self-hosted or carefully configured.
Good privacy posture for most teams, especially when self-hosted or carefully configured.
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
Moltis 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
Moltis 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.
Moltis 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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