01
Overview
Mastra Factory is an open-source, agent-powered software delivery environment from Mastra that turns work items such as GitHub or Linear issues into a staged workflow for triage, planning, implementation and review.
02
What launched
Mastra announced the Factory beta on September 8, 2026. The company describes it as the internal system it built to automate its own software work before releasing it publicly. Mastra says Factory is currently responsible for roughly 25–35% of its pull requests and closes 50–60% of its issues. Those figures are Mastra's own internal measurements, not independent benchmarks, so they should be read as a description of the company's experience rather than a universal productivity expectation.
03
How Mastra Factory works
Factory is organized around configurable lifecycle stages. Mastra's own example is Intake → Triage → Planning → Build → Review → Done. Teams can change those stages and decide whether each step runs manually or automatically.
At each stage, agents operate in sandboxed environments under stage-specific rules. A work item keeps an agent session that includes chat, tool activity and workspace files. Humans can inspect diffs, answer questions, change plans, approve actions and decide whether a pull request should merge.
04
GitHub, Linear and Slack
Mastra says Factory can connect GitHub, Linear and Slack. GitHub and Linear can supply issues and pull requests to the workflow, while Slack can participate in team coordination. The main value is not simply another coding chat interface: Factory attempts to preserve one workflow from intake through reviewed implementation.
05
Can it work with an existing codebase?
Yes. Mastra's product documentation says teams can connect an existing GitHub repository. Factory can inspect the codebase, plan a requested change, implement it, run checks and open a pull request. Human review remains part of the default workflow.
06
Is Mastra Factory open source?
Yes. Mastra describes Factory as open source and publishes a software factory template on GitHub. The template can run locally, including an auth-less local mode before integrations are configured. The project exposes both the Factory UI and API from the same local server.
07
Local, hosted and self-hosted deployment
Mastra offers a hosted path through Mastra Platform, but its product documentation also says Factory can be hosted on your own infrastructure. That makes the tool relevant to teams that want agentic software delivery without handing the entire development workflow to a closed SaaS product.
Self-hosting does not make the system automatically secure. Model credentials, repository permissions, tool access, sandbox configuration and deployment secrets still need to be scoped carefully.
08
Mastra Factory pricing
Mastra's current Factory page lists three Mastra Platform tiers.
Starter is $0/month and currently includes 100,000 observability events, 24 CPU hours and 15 days of data retention, with unlimited users, deployments and projects. Usage beyond the included amounts is billed separately according to the listed overage rates.
Teams is $250/month and currently includes 1 million observability events, 250 CPU hours, six months of data retention, multiple teams, SSO and SOC 2 documentation. Enterprise uses custom pricing and adds enterprise controls and support.
These are platform prices, not a universal all-in cost for running coding agents. Model-provider usage and other infrastructure can create additional expense depending on configuration.
09
What makes Factory different from a coding agent?
A coding agent usually starts with a task and produces code. Factory tries to manage the surrounding software-development lifecycle as well: intake, clarification, planning, isolated execution, review and completion. Its configurable stages and explicit human gates are therefore at least as important as the underlying coding model.
10
Where it may fit best
Factory is most relevant to teams with a steady stream of structured engineering work: feature requests, bug fixes, refactors, tests and maintenance tasks. It may also be useful to agencies maintaining many repositories because repeatable stage rules can reduce the amount of manual coordination around each change.
Mastra also says the open-source system can be adapted beyond software development to other multi-step processes such as content production, research or data analysis. That is a capability of the underlying framework rather than evidence that every non-coding workflow is mature today.
11
Important limitations
Factory is still in beta. Its productivity numbers are vendor-reported, not independently validated. Real results will depend on repository quality, test coverage, issue clarity, model choice, tool permissions and how much autonomy a team allows.
Teams should also distinguish Mastra Platform pricing from external model and infrastructure costs. A free Factory deployment is not necessarily a zero-cost production workflow.
12
FAQ
When did Mastra Factory launch?
Mastra announced the public beta on September 8, 2026.
Is Mastra Factory free?
The Factory software is open source, and Mastra currently offers a $0 Starter tier on Mastra Platform. External model or infrastructure usage may still cost money.
Does Mastra Factory support GitHub?
Yes. Mastra documents GitHub repository and issue integration, and Factory can create reviewed pull requests from connected work.
Does it support Linear?
Yes. Linear can be used as a work-intake source in the Factory workflow.
Can I self-host Mastra Factory?
Mastra says Factory can be hosted on your own infrastructure as well as deployed on Mastra Platform.
Is it fully autonomous?
It can automate stages, but Mastra's documented workflow includes human checkpoints for questions, plans, diffs and merges. Teams decide how much autonomy to grant.
13
Bottom line
Mastra Factory is an early example of the shift from standalone coding assistants toward persistent, governed software-delivery systems. Its strongest idea is not 'AI writes code'; it is that agents can move work through a visible lifecycle while humans retain explicit review gates. Because it is open source and can run outside a proprietary coding-agent SaaS, it is worth watching closely as agentic development workflows mature.
Sources
Primary and supporting sources
Facts were rechecked against the linked sources immediately before publication. Pricing, product availability and rollout status can change.