Comparison
mastra vs modelfusion
Verdict
Pick mastra if mastra is a modern TypeScript framework tailored specifically for building AI-powered applications and agents, supporting technologies like chatbots, language models, and TTS; pick modelfusion if a TypeScript library for AI applications, supports diverse models.
Markdown twin · mastra alternatives · modelfusion alternatives
GraphCanon updated 4d
vs
Trust & integrity
| Signal | mastra | modelfusion |
|---|---|---|
| Maintenance | Very active (0d since push) As of 4d · github_public_v1 | Archived (757d since push) As of 5d · github_public_v1 |
| Provenance | Not a fork · Organization account As of 4d · github_public_v1 | Not a fork · Organization account As of 5d · github_public_v1 |
| OSV dependency advisories | No lockfile (source not queried) As of 1mo · osv@v1 | No lockfile (source not queried) As of 1mo · osv@v1 |
| deps.dev advisories | Not queried deps.dev@v1 | Not queried deps.dev@v1 |
| OpenSSF Scorecard | Not queried openssf-scorecard@v1 | Not queried openssf-scorecard@v1 |
Tagline
- mastra
- Modern TypeScript framework for AI-powered applications and agents
- modelfusion
- TypeScript library for building AI applications
Stars
- mastra
- 27k
- modelfusion
- 1.3k
Forks
- mastra
- 2.6k
- modelfusion
- 95
Open issues
- mastra
- 469
- modelfusion
- 42
Language
- mastra
- TypeScript
- modelfusion
- TypeScript
Adopt for
- mastra
- Mastra is a modern TypeScript framework tailored specifically for building AI-powered applications and agents, supporting technologies like chatbots, language models, and TTS.
- modelfusion
- A TypeScript library for AI applications, supports diverse models.
Persona
- mastra
- -
- modelfusion
- -
Runtime
- mastra
- -
- modelfusion
- -
License
- mastra
- Mastra operates under a dual-license model with its core components licensed under Apache-2.0 and enterprise-exclusive features under the proprietary Mastra Enterprise License.
- modelfusion
- MIT
Last pushed
- mastra
- Aug 16, 2026
- modelfusion
- Jul 19, 2024
Categories
- mastra
- AI Agents, Evaluation & Observability, LLM Frameworks, Speech & Audio
- modelfusion
- Developer Tools, LLM Frameworks
Trust and health
Maintenance
- mastra
- Very active (96%)
- modelfusion
- Archived (8%)
Days since push
- mastra
- 0d
- modelfusion
- 757d
Archived on GitHub
- mastra
- No
- modelfusion
- Yes
Open issues (now)
- mastra
- 469
- modelfusion
- 42
Stars delta
- mastra
- +954 (30d)
- modelfusion
- +1 (30d)
Open issues delta
- mastra
- +66 (30d)
- modelfusion
- 0 (30d)
Full report
- mastra
- Trust report
- modelfusion
- Trust report
Choose mastra if…
- License: mastra is Other, modelfusion is MIT.
- Pricing: Free for open-source Apache-licensed portions; Mastra Enterprise License subscription required for full feature access..
- Requirements: Project must be developed in TypeScript.; JavaScript and TypeScript ecosystems (Node.js, NextJS) are prerequisites for leveraging Mastra's integrations fully..
- Tags unique to mastra: agents, chatbots, evals, javascript.
- Also covers AI Agents, Evaluation & Observability, Speech & Audio.
- You should use Mastra when you are developing AI-driven applications or bots that require integration with technologies such as text-to-speech (TTS) or complex chatbot functionalities.
When NOT to use mastra
- Mastra may not be suitable if your application does not require TypeScript and prefers simpler setup or non-TypeScript environments.
- Avoid using Mastra if enterprise-level features or a dual-license model do not align with your project’s requirements or budget, especially when cost-free, fully open-source alternatives exist that
- If you are working on smaller projects where the overhead of a comprehensive framework like Mastra overwhelms the available resources or the scope of work is minimal, consider lighter-weight solutions
Choose modelfusion if…
- License: modelfusion is MIT, mastra is Other.
- Tags unique to modelfusion: artificial-intelligence, chatbot, claude, dall-e.
- Also covers Developer Tools.
- You prioritize TypeScript in development and require support for multiple LLMs.
When NOT to use modelfusion
- If your preference leans towards languages other than TypeScript for AI projects.
- For projects that demand a library strictly limited to one type of LLM framework.
Explore
Sources
Every stat on this page traces to a dated GitHub sync, license file, enrichment field, or trust scan.
- GitHub stars (mastra-ai/mastra) · observed Aug 16, 2026
- GitHub forks (mastra-ai/mastra) · observed Aug 16, 2026
- Last push (mastra-ai/mastra) · observed Aug 16, 2026
- License file (Other) · observed Aug 16, 2026
- Decision facts (enrichment) · observed Jul 11, 2026
- Trust scan (lockfile / OSV) · observed Jul 11, 2026
- GitHub stars (vercel/modelfusion) · observed Aug 15, 2026
- GitHub forks (vercel/modelfusion) · observed Aug 15, 2026
- Last push (vercel/modelfusion) · observed Jul 19, 2024
- License file (MIT) · observed Aug 15, 2026
- Decision facts (enrichment) · observed Jul 14, 2026
- Trust scan (lockfile / OSV) · observed Jul 11, 2026
GitHub stars on cards: mastra 27k · modelfusion 1.3k (synced Aug 16, 2026).
Common questions
- What is the difference between mastra and modelfusion?
- mastra: Modern TypeScript framework for AI-powered applications and agents. modelfusion: TypeScript library for building AI applications. See the comparison table for live GitHub stats and shared categories.
- When should I choose mastra over modelfusion?
- Choose mastra over modelfusion when License: mastra is Other, modelfusion is MIT; Pricing: Free for open-source Apache-licensed portions; Mastra Enterprise License subscription required for full feature access.; Requirements: Project must be developed in TypeScript.; JavaScript and TypeScript ecosystems (Node.js, NextJS) are prerequisites for leveraging Mastra's integrations fully.; Tags unique to mastra: agents, chatbots, evals, javascript; Also covers AI Agents, Evaluation & Observability, Speech & Audio; You should use Mastra when you are developing AI-driven applications or bots that require integration with technologies such as text-to-speech (TTS) or complex chatbot functionalities.
- When should I choose modelfusion over mastra?
- Choose modelfusion over mastra when License: modelfusion is MIT, mastra is Other; Tags unique to modelfusion: artificial-intelligence, chatbot, claude, dall-e; Also covers Developer Tools; You prioritize TypeScript in development and require support for multiple LLMs.
- When should I avoid mastra?
- Mastra may not be suitable if your application does not require TypeScript and prefers simpler setup or non-TypeScript environments. Avoid using Mastra if enterprise-level features or a dual-license model do not align with your project’s requirements or budget, especially when cost-free, fully open-source alternatives exist that If you are working on smaller projects where the overhead of a comprehensive framework like Mastra overwhelms the available resources or the scope of work is minimal, consider lighter-weight solutions
- When should I avoid modelfusion?
- If your preference leans towards languages other than TypeScript for AI projects. For projects that demand a library strictly limited to one type of LLM framework.
- Is mastra or modelfusion more popular on GitHub?
- mastra has more GitHub stars (27,229 vs 1,319). Stars measure visibility, not whether either tool fits your constraints.
- Are mastra and modelfusion open source?
- Yes - both are open-source projects on GitHub (mastra: Other, modelfusion: MIT).
- Where can I find alternatives to mastra or modelfusion?
- GraphCanon lists graph-backed alternatives at mastra alternatives and modelfusion alternatives (mastra markdown twin, modelfusion markdown twin), ranked by typed relationship edges rather than popularity votes.
- Is there a machine-readable version of this comparison?
- Yes. The markdown twin at this comparison mirrors this page for agents and LLM crawlers, with the same stats table and FAQ answers.
- Which is better maintained, mastra or modelfusion?
- mastra: Very active. modelfusion: Archived. Compare maintenance labels, days since push, and release cadence in the trust section below - stars alone do not measure maintenance.
- Where are the full trust reports for mastra and modelfusion?
- GraphCanon publishes per-repo trust reports with dated maintenance, provenance, and scan summaries: mastra trust report; modelfusion trust report.