Originally published on butterneck.com.
Adaptl and Butterneck both start from the same idea: the person who asked for a change should try it on a running app before it ships, and the team's own coding agent should do the work. They make different choices after that. We make Butterneck, so we are not neutral. We have stuck to what Adaptl says on its public site, and we say where Adaptl may be the better pick.
Everything about Adaptl below comes from adaptl.ai and its compare page, as read on November 3, 2026. Adaptl is a young product and is changing fast. Check its site for the current details.
Adaptl vs Butterneck, in short: Adaptl opens the GitHub issue, branch and draft pull request itself, hands the brief to your agent, and fills the preview with made-up customers. Butterneck works on the app as it already runs on a developer's computer, can start from a Jira label, and does not commit, push or open a pull request. The edit runs on your computer. Your team still decides what goes live.
What Adaptl says it does
Adaptl's home page says: "See your AI's changes work before your users do." Its flow, in its own words:
- You describe the change "the way a customer would notice it". Adaptl asks about cases you missed, "then opens the issue, branch and draft pull request on GitHub".
- It hands the brief to "Claude Code, Codex or Aider on your computer, or any agent you mention on the pull request". You use your own AI key.
- You open a preview "full of made-up customers", such as an admin, a new user and a locked-out account, pin what's wrong, and the agent fixes it. "Then your team merges."
Its FAQ says: "Adaptl prepares a normal pull request on GitHub. Nothing merges until a person on your team approves it." It also says the preview never uses your customers' records: "Every person and record in a preview is made up."
Other things on the site: a plain-English history of how the product evolved from merged pull requests ("lineage"), a list of what a change does for users before it merges, helper agents (some marked "Coming"), and a playground where you can explore a shared project first. It lists PostgreSQL, Django, Prisma, SQLAlchemy and GitHub, with MySQL "soon", and says it is tested on Saleor and Cal.com.
On price and hosting it says: "Signing up is free. Adaptl runs online at inloop.adaptl.ai, hosted in the EU, or on your own computer." We did not find a public pricing page.
What Butterneck does
- A PM, designer or support lead opens a share link to the app running on a developer's computer and types the change in a chat next to the screen they mean. Or they label a Jira Cloud ticket
butterneckand assign it. - The coding agent CLI the developer already uses (Cursor, Claude Code or Antigravity) edits the connected project folder on that computer.
- The requester checks the result on the same preview. The developer reviews the diff in their own tools and ships it through the team's usual process.
Butterneck does not commit, push, open a pull request, merge or deploy. To be exact about data: files are edited on the developer's computer, the coding CLI sends prompts and code context to its own AI provider, and preview traffic and chat pass through Butterneck's server. More in how the agent runs on your machine.
The main differences
| Adaptl (as of 3 Nov 2026) | Butterneck | |
|---|---|---|
| Who opens the pull request | Adaptl opens the issue, branch and draft PR on GitHub | Nobody, automatically. The developer decides whether to commit and open a PR |
| Code host | GitHub repo, or start a project from scratch | Any project folder that runs on the developer's computer |
| Data in the preview | Made-up customers written through your app's models | The app as it runs on the developer's computer, with whatever data it has there |
| Agents | Claude Code, Codex, Aider, or an agent mentioned on the PR | Cursor, Claude Code or Antigravity CLI |
| Where it runs | Online (EU-hosted) or on your own computer | The connector runs on the developer's computer; share link relayed by Butterneck |
| Jira | Not mentioned on its home page | Label a ticket butterneck; the preview link is posted back to the ticket |
| Try before setup | Playground with a shared project | Sample shop (app.butterneck.com/trial), before connecting a computer |
| Price | "Signing up is free"; no public pricing page found | Starter free; Pro USD 19 per person per month |
The pull request
This is the clearest fork. Adaptl puts the change on a branch and a draft PR from the start, and the loop runs inside that PR. Butterneck stops at edited files and a running preview. Some teams want the PR made for them. Others want the AI kept out of their Git history until a developer has looked. See why we show a live preview before a pull request.
Preview data
Adaptl's made-up customers let you try a change as an admin, a new user or a locked-out account without touching real records. That is a real strength for apps with many roles. Butterneck previews whatever the app already has on the developer's computer, which is quick to set up but only as good as that data.
See it before you set anything up: create a free account and try a request on a sample shop before connecting a computer. On your own project, the edit runs on your computer. Your team still decides what goes live.
When Adaptl is likely the better fit
- You want the tool to open the issue, branch and draft PR for each change.
- You want to try changes as several kinds of customer with realistic made-up data.
- Your stack is on its list (for example Django or Prisma with PostgreSQL) and your code is on GitHub.
- You like the idea of a running history of how the product evolved.
When Butterneck is likely the better fit
- Most requests are small (copy, layout, a missing field) and the slow part is explaining which screen.
- You want the AI to edit files and stop there, with a developer deciding what becomes a commit.
- Requests already live in Jira and you want a label and an assignee to start the work.
- Your team already pays for Cursor, Claude Code or Antigravity.
FAQ
Is Butterneck an Adaptl alternative?
Partly. Both put a non-developer on a live preview and use the team's own coding agent. Adaptl opens a draft pull request and seeds made-up customers. Butterneck works on the app running on a developer's computer and opens no pull request.
Does Butterneck open pull requests like Adaptl?
No. Butterneck edits files in the connected folder. The developer reviews them and decides whether to commit, open a PR, or throw the change away.
Does Butterneck keep my code on my computer?
The files are edited on the developer's computer, but not everything stays there. The coding CLI sends prompts and code context to its AI provider, and preview traffic and chat pass through Butterneck's server.
What does each cost?
Adaptl says signing up is free and you pay your AI provider directly; we found no public pricing page. Butterneck Starter is free for one developer and one requester, and Pro is USD 19 per person per month. With both, you pay for your own AI agent. See pricing.
Try it
See a request run on the sample shop, or see pricing and start on the free Starter plan. For a wider view, read AI tools that let non-developers change an existing web app and our Itera comparison.
