Rollbar Lines | A software factory on your own systems

Rollbar Lines takes the tickets that eat your team’s week and works them in parallel, on virtual machines on your own systems. A Rollbar team installs it, writes the operating documents for your repositories, and stays to tune it. Tested pull requests come back for your engineers to approve, and your code never leaves your systems.
Pre-check live-feed support and fall back to a timed refresh when it is unavailable
agent/PLA-1666 in your repository, on your systems
Feed client, fallback timer, and the tests that cover both paths
Your unit suite and lint checks. Passed.
Behavior against production traffic. Nobody has run this against live data.
Pull request open and waiting on a reviewer from your team.
What changes for your team
Every ticket goes down the same line. A virtual machine comes up, the tests run, a pull request comes out, and one of your people approves it. Run twenty tickets or two hundred and the line does not change. The numbers come from one of our own teams, twelve people across engineering, design, and product, comparing the two weeks before it arrived with the latest two weeks, eight months apart.
Merged pull requests per week rose 3.5x over eight months with no added headcount. Rollbar Lines wrote 35% of what merged.
The slowest quarter of pull requests took about 47% less time to merge over the same eight months, and the median stayed under a day. The agent’s pull requests arrive with the tests already run and the report already written.
Every pull request your engineers open gets a review that names the files it followed and the checks it skipped. In the case study, reviews went from a handful a month to about twenty a day once Rollbar Lines reviewed everything automatically.
Capacity without headcount
Each job gets its own virtual machine, created on demand on your own systems, so a sprint’s worth of scoped tickets runs in parallel and nothing waits in a queue behind a single agent.
The work it takes on is the dependency upgrades, feature-flag removals, bug reproductions, and 145-line changes that nobody gets to, so the people you hired for the roadmap can work on the roadmap. It reads the error monitoring and metrics you already run, so you do not have to change observability tools to use it. If you already use Rollbar Observability, you get the deepest version. Production errors arrive as tickets it can reproduce and fix with the stack trace attached, and the check after the merge reads the same error it started from.
Case study figures were measured from our own code host across three repositories, comparing two-week windows eight months apart.
We install it with you
Rollbar Lines is only as good as what it knows about your systems, meaning how the pieces fit together, how each repository gets run and tested, and the things a reviewer knows that a diff never shows. We sit down with your engineers and write that down together in three short documents. The first is a map of how your systems connect, the second is an operating guide for each repository, and the third holds the notes a reviewer needs. That is most of the install.
You provide a place for it to run (a cloud account or your own data center), access to the repositories you choose, and a first set of tickets. We agree on the never-run list and who can trigger a run.
We stand up the service and build the virtual machine image with your development environment. We interview your engineers, draft the map, the operating guides, and the review notes, and verify every claim in them against your code.
We start with one team, one repository, and a first line of tickets. Your reviewers correct it, and the corrections go back into the documents. We tune until the merge rate is one you are happy with.
We stay on, and each new repository gets its own operating document and each new kind of work gets its own line.
We tell every customer up front that nobody’s map of their own architecture survives contact with their code, and ours did not. The corrections are the most valuable thing the install produces.
Compared with the agents you already pay for
Cursor and Anthropic both tell self-hosted customers to staff it themselves, and their docs list the worker image, the infrastructure, the secrets, the scaling, and the validation as things you own. A Rollbar team installs Rollbar Lines on your systems, writes the operating documents for your repositories, and stays on to tune it.
Cursor, Claude Code, and Copilot can borrow your machines, and even then they run the agent and read your code through their own service. Rollbar Lines runs the whole thing on your systems and calls only the model provider you already have an agreement with, on your keys. One of our customers pays for Cursor and still will not turn on its cloud agents for that reason.
Devin can merge its own work, Cursor’s routing agent approves low-risk changes, and OpenHands merges below a risk threshold. With Rollbar Lines a person on your team merges every change, and the agent has no path to your main branch.
Cursor, Claude Code, Copilot, Codex, and Devin all stop at the pull request. Ask Rollbar Lines whether the fix held and it reads your error monitoring and your metrics and reports what it sees.
Follow a ticket through every step to a merged pull request, and see the kinds of work your team can give it.
See where every part of it runs, what leaves your environment, who can start a run, who can merge, and how you turn it off.
Read the security page →
We installed it at Rollbar first. In under six months it wrote 271 pull requests across 21 of our repositories, and our engineers merged 157 of them after review. One of our teams saw merged pull requests per week rise 3.5x in eight months.
Set up a demo, or talk with a Rollbar engineer about where it would fit. Tell us what you run and which tickets you would give it first, and we will reply with a time.
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