This product was not featured by Product Hunt yet. It will not be visible on their landing page and won't be ranked (cannot win product of the day regardless of upvotes).
Your agent writes the code, then the conversation ends and you review it alone. Diffo keeps it open: a live diff in your browser. Comment on a line and the session that wrote it answers, and its fix lands in the diff you're reading. Big changes come in layers, in the order to read them. Works on GitHub PRs too: the agent drafts comments, you submit. Not an AI reviewer: no grades, no nitpicks. Works with Claude Code, Cursor, Codex. Local, no account, Apache-2.0. Try it: diffo.io/demo
AI agents can make changes across dozens of files in minutes. Reviewing those changes takes longer. You need to understand how the pieces fit together, why certain decisions were made, and whether the code actually does what you wanted.
That’s where we were spending more and more of our time. Reading a long diff, figuring out where to start, then jumping back to chat whenever we had a question or wanted something changed.
We built Diffo to make that part easier.
Type /diffo and a live review opens in your browser, connected to your coding agent.
• Leave a question directly on the code. The agent answers in the same thread, with the context of what you’re reading.
• Ask for a change. The agent makes the fix, the diff updates, and anything edited since you read it is marked.
• Work through bigger changes in layers: related files grouped into smaller steps, with explanations and a suggested reading order.
• Open an existing GitHub PR, discuss it privately with your agent, and submit your review to GitHub when you’re ready.
You’re still the reviewer. Diffo helps you understand what you’re looking at and work through it with the agent.
It works with Claude Code, Cursor, Codex, Copilot CLI, Gemini CLI, and more. It runs locally, needs no account, and is open source under Apache-2.0.
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About Diffo on Product Hunt
“The same agent that builds it helps you review it”
Diffo was submitted on Product Hunt and earned 2 upvotes and 1 comments, placing #150 on the daily leaderboard. Your agent writes the code, then the conversation ends and you review it alone. Diffo keeps it open: a live diff in your browser. Comment on a line and the session that wrote it answers, and its fix lands in the diff you're reading. Big changes come in layers, in the order to read them. Works on GitHub PRs too: the agent drafts comments, you submit. Not an AI reviewer: no grades, no nitpicks. Works with Claude Code, Cursor, Codex. Local, no account, Apache-2.0. Try it: diffo.io/demo
Diffo was featured in Open Source (69k followers), Developer Tools (521.5k followers) and GitHub (41.4k followers) on Product Hunt. Together, these topics include over 138.8k products, making this a competitive space to launch in.
Who hunted Diffo?
Diffo was hunted by Refael Shetrit. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
Want to see how Diffo stacked up against nearby launches in real time? Check out the live launch dashboard for upvote speed charts, proximity comparisons, and more analytics.
Refael Shetrit
Hey Product Hunt 👋
AI agents can make changes across dozens of files in minutes. Reviewing those changes takes longer. You need to understand how the pieces fit together, why certain decisions were made, and whether the code actually does what you wanted.
That’s where we were spending more and more of our time. Reading a long diff, figuring out where to start, then jumping back to chat whenever we had a question or wanted something changed.
We built Diffo to make that part easier.
Type /diffo and a live review opens in your browser, connected to your coding agent.
• Leave a question directly on the code. The agent answers in the same thread, with the context of what you’re reading.
• Ask for a change. The agent makes the fix, the diff updates, and anything edited since you read it is marked.
• Work through bigger changes in layers: related files grouped into smaller steps, with explanations and a suggested reading order.
• Open an existing GitHub PR, discuss it privately with your agent, and submit your review to GitHub when you’re ready.
You’re still the reviewer. Diffo helps you understand what you’re looking at and work through it with the agent.
It works with Claude Code, Cursor, Codex, Copilot CLI, Gemini CLI, and more. It runs locally, needs no account, and is open source under Apache-2.0.
Try the demo, no install needed:
https://diffo.io/demo
Or add the skill to your agent:
npx skills add DiffoHQ/diffo --skill diffo -g
Then use /diffo for local changes, or /diffo followed by a PR link.
If you try it, tell us what helps and where you get stuck. We’re here to answer questions 🙂