Greptile's pitch is context. It indexes your repository into a graph of files, functions and classes and how they connect, so a review can follow a change out into the code that depends on it rather than reading the diff in isolation. That is a genuinely good idea and it is the thing most AI reviewers are worst at.
Talyn's pitch is restraint. A review runs several agents with different concerns, has a judging pass throw out everything it cannot stand behind, and puts what survives in the app rather than on your pull request.
The interesting comparison is not "which reads more code". It is what each tool does with a finding once it has one.
What Greptile does
As of September 2026, from its own site and pricing page:
- Builds a graph of the codebase — files, functions, classes, directories and their relationships — and reviews a pull request against it, tracing which dependencies a change affects.
- Posts a pull request summary and inline comments tied to specific lines, with a confidence score on each finding.
- Generates sequence diagrams showing call flows for a change.
- Answers follow-up questions in the pull request thread.
- Supports custom rules and connections to external apps.
Pricing is per seat with credits: a free Starter tier for one active developer with 50 credits a month and unlimited repositories, Pro at $30 per seat per month with 50 credits included per seat and $1 per extra credit, and Enterprise with a self-hosting option. Reviews cost 1, 3 or 10 credits depending on depth. Qualifying open-source projects and early-stage startups get free or discounted access.
Where the two actually differ
On the confidence problem. Both tools know that a reviewer which surfaces everything it notices is useless. Greptile's answer is to score each finding and show you the score. Talyn's is to run a separate judging pass whose job is to reject, and to only show you what it kept — with the reason it kept or dropped each one recorded.
A score hands the filtering decision back to you, which is honest and puts the work in your lap. A judge makes the decision and has to be right. Ours keeps a minority of candidates; on the first real review it ran, one of six.
On where it goes. Greptile comments on the pull request. Talyn does not write to GitHub at all during a review — no comments, no approval, no requested changes, enforced in the reviewing agent's own system prompt. The findings live in the app, grouped by severity, each naming which of the reviewers raised it.
On what happens next. A Greptile review ends with the review. Talyn's ends with a button: tick the findings worth acting on and an agent makes those changes and pushes one commit to the branch. And a confirmed blocker parks the pull request in Talyn's merge queue rather than letting it land.
On the bill. Greptile is per seat plus credits, and a deep review costs ten of them. Talyn is $15/month flat — or free, with three concurrent tasks and one review cycle — and the inference runs on the Claude or ChatGPT subscription you already pay for, so there is no metered cost per review from us.
What Talyn does not do
- No codebase graph. A Talyn review reads the diff and the repository it is checked out in, with the agent free to open whatever files it decides it needs. That is a general-purpose coding agent exploring, not a pre-built dependency index, and on a large repository Greptile's approach will sometimes see a consequence ours does not go looking for.
- No inline comments and no confidence scores on the pull request, because nothing goes on the pull request.
- No sequence diagrams.
- GitHub only, and no self-hosting.
- Slower. Standard is typically about half an hour and Deep can be over an hour, because several reviewers run in parallel and then two more passes go over everything they produced.
What Greptile does not do
Land the pull request. It reviews, and reviewing is the whole product. Nothing watches the branch afterwards, nothing fixes the failing test, nothing merges it when it goes green.
Talyn's review sits inside that loop, and honestly the loop is the bigger half: the same agent that fixes a review finding fixes your CI, resolves the conflict when main moves underneath you, and hands off to a queue that merges the thing in order the moment it is ready.
Which one
Use Greptile if the reviews that matter to you are cross-cutting — the change that is fine locally and breaks a caller elsewhere — and you want that raised inline with a confidence score, in front of whoever else is reading. Its indexing approach is built for exactly that and Talyn's is not.
Use Talyn if you want the review to stay between you and the tool, you would rather be shown three findings that survived scrutiny than twelve with scores attached, and what you are ultimately after is the pull request landing without you nursing it.