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If you want an Assrt alternative that checks what the app did after your agent's change (requests, state, console) rather than generating more Playwright specs, Reticle is built for that. If you want plain Playwright test code written for you and kept in your repo, Assrt fits better.
What Assrt does
Assrt describes itself as an "Open-source AI testing framework. Write tests in plain English, discover scenarios automatically, self-heal on UI changes. Built on Playwright" (assrt.ai).
assrt discover <url> crawls an app and writes standard Playwright TypeScript specs. assrt generate "<scenario>" adds specs from English, and broken selectors are patched in a pull request. It ships an MCP server with setup for Claude Code, Cursor and VS Code.
It is MIT-licensed and early: the site says "Now in public beta" and the repo had about 21 stars on 2026-10-25 (GitHub). Pricing is open source at $0, Cloud at $49 per seat a month, and Enterprise custom (pricing).
What Reticle does
Reticle checks an AI coding agent's change and returns a pass or fail with evidence. It reads the network calls, the console, the DOM and the application state, and on React and Svelte it names the file:line to fix.
Your agent calls it over MCP from Claude Code, Cursor or Codex. Flows it drives are saved and replay with no model in the loop. It works on your own app with the SDK built in, and on sites you don't own by driving its own browser and injecting the SDK; app state and file:line need your build. The SDK is open source (Apache-2.0).
Assrt vs Reticle at a glance
| Assrt | Reticle | |
|---|---|---|
| Main output | Playwright spec files in your repo | A verdict with evidence for each check |
| How it sees the app | Outside the page, through the browser | Inside the page: network, state, console, DOM |
| Points to the fix | The failing spec step | The failing request or state, and file:line on React and Svelte |
| Re-runs | Playwright runs the specs | Saved flows replay with no model, 0% flake over 8 replays |
| MCP for coding agents | Yes | Yes |
| Maturity | Public beta, v0.1 | Released, with a published benchmark |
| License | MIT | SDK Apache-2.0; server FSL-1.1 |
| Pricing | $0 OSS; Cloud $49/seat/mo | Start free, no card; open-source SDK free |
Where Assrt is the better choice
- You want test code you own. Assrt's output is plain Playwright, so it runs anywhere Playwright runs and you can drop the tool later. Reticle saves flows in its own format.
- You want a suite discovered for you.
assrt discovercrawls the app and proposes scenarios. Reticle covers the flows your agent or you drive. - You want everything MIT. Assrt is MIT throughout. Reticle's SDK is Apache-2.0, but its server is FSL-1.1.
- You already run Playwright in CI and want more specs in it, not a second tool.
Where Reticle is the better choice
- The bug does not show on screen. A request that fires twice, a write that returns 200 and never persists, a store that disagrees with the total. A spec that checks the screen passes; Reticle reads the request count, the state and the console and fails the step.
- Your agent needs a verdict, not a file. The agent reads pass or fail with the evidence in the same session and fixes the
file:linebefore it says done. - You need numbers before you trust it. Reticle caught 85 of 88 seeded bugs with no false alarms in its published benchmark, and re-verifying a four-flow suite costs about 480 tokens.
Can you use both?
Yes. Assrt can grow your Playwright suite, and Reticle can check each agent change underneath the screen while it is being made. One leaves test files behind; the other answers "did this change work?" The argument for checking behaviour, not just assertions, is in why a green check isn't proof.
For more browser-driving tools, see Reticle vs Playwright MCP and the Playwright alternative page. Every comparison is on the alternatives hub.
Try Reticle
Paste one line to your coding agent and it installs and wires the SDK:
Follow https://raw.githubusercontent.com/reticlehq/reticle/main/SKILL.md
Or run npx @reticlehq/core init. The README has the details.
FAQ
What is the best alternative to Assrt?
The best alternative to Assrt depends on what you want from it. For a verdict on each agent change, read from network, state and console inside the app, Reticle fits. For hand-written Playwright tests, use Playwright itself. For another AI tool that writes Playwright specs for you, look at test-generation tools.
Is Assrt open source?
Yes, Assrt is open source under the MIT license, built on Playwright, with a paid Cloud plan at $49 per seat a month. It was in public beta at version 0.1 when checked in October 2026. Reticle's SDK is open source under Apache-2.0, and its server is source-available under FSL-1.1.
How is Reticle different from Assrt?
Reticle is different from Assrt in what it produces. Assrt writes Playwright spec files that test the app from outside the page. Reticle gives your coding agent a pass or fail with evidence from inside the page, including network calls, app state and console, and points to the source line on React and Svelte.
Do both work with Claude Code and Cursor?
Yes, both work with Claude Code and Cursor through MCP. Assrt documents MCP setup for Claude Code, Cursor, VS Code, Windsurf and Claude Desktop. Reticle ships an MCP server for Claude Code, Cursor and Codex, and a skill file the agent can follow to install and wire it into your app.
Why Reticle
Your agent says it works. Reticle checks.
- Checks each change inside the running app: network, state and console, not a screenshot.
- Returns a pass or fail with the evidence and the file:line to fix.
- Open-source SDK on your machine, or the platform on every preview and PR.
No credit card required.