Which is more popular, Mastra or oumi?

Mastra has more GitHub stars (28,498 vs 9,393).

Which is more actively developed, Mastra or oumi?

Mastra had more commits in the last 90 days (4,044 vs 109).

Compare their capabilities, limitations and "best for" notes above. Trying each on a small task is the fastest way to decide.

Side-by-side comparison of two AI agent tools

Mastra is growing faster: +969 GitHub stars in the last 30 days vs +75 for oumi.
Pick Mastra for: from the team behind Gatsby, Mastra is a framework for building AI-powered applications and agents. Pick oumi for: easily fine-tune, evaluate and deploy gpt-oss, Qwen3, DeepSeek-R1, or any open source LLM / VLM.

From GitHub data refreshed daily.

From the team behind Gatsby, Mastra is a framework for building AI-powered applications and agents with a modern TypeScript stack.

oumiopen-source

Easily fine-tune, evaluate and deploy gpt-oss, Qwen3, DeepSeek-R1, or any open source LLM / VLM!

+Comprehensive end-to-end pipeline covering fine-tuning, evaluation, and deployment of open-source LLMs/VLMs with minimal setup
+Strong community support and active development with regular releases, extensive documentation, and integration with popular ML frameworks
+Advanced features including automated hyperparameter tuning, data synthesis, and RLVF support for sophisticated model training workflows

-Limited to open-source models only, excluding proprietary models like GPT-4 or Claude
-Requires significant computational resources and GPU access for effective model fine-tuning
-Learning curve may be steep for users new to LLM fine-tuning concepts and workflows

•Fine-tuning specialized domain models for text-to-SQL generation or other domain-specific tasks
•Developing custom AI agents with reinforcement learning capabilities using OpenEnv integration
•Creating production-ready custom language models with automated evaluation and deployment pipelines

Which is more popular, Mastra or oumi?: Mastra has more GitHub stars (28,498 vs 9,393).
Which is more actively developed, Mastra or oumi?: Mastra had more commits in the last 90 days (4,044 vs 109).
Should I use Mastra or oumi?: Compare their capabilities, limitations and "best for" notes above. Trying each on a small task is the fastest way to decide.